warmpancakes
New member
Re: Turbo 3800 blazer
I heard the guy with the tcase is an asshole
I heard the guy with the tcase is an asshole
Turbo 3800 blazer
- Thread starter BMFB
- Start date
BMFB
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Re: Turbo 3800 blazer
I started into the transmissions I have. In the first one I have a beast shell, and some good hardened 4 gear planetarys as well as some other case hardened things. I havn't torn into the other yet, but its looking good. I should have it together tonight and Ill post up some pics.
I started into the transmissions I have. In the first one I have a beast shell, and some good hardened 4 gear planetarys as well as some other case hardened things. I havn't torn into the other yet, but its looking good. I should have it together tonight and Ill post up some pics.
BMFB
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Re: Turbo 3800 blazer
Trans went together pretty well.
The hardparts should be good for 800 horse, the softparts might hold that for a while...The part that worries me the most is the 3800 style input shaft and the converter. but build list is something like
hardened plantaries
.55 boost valve
corvette servo
beast shell
hardnened front drum (stock input drum, fingers crossed)
redline clutches (few extra whereever we could)
firm but not ever firm shiftkit (too hard and Ill just sheer hardparts)
new front pump
new valvebody (got lucky on a never used factory 89 valvebody)
new redline band
I'll put some cheepo deeper oil pan on it and a derale 16 pass cooler, which seems to work great on the ty. I'm hoping that the zero chance I have of really launching this thing with the converter and the size of the turbo should help save the trans. The 2-3 shift will be interesting though.
I also am buying a turbosmart 38mm wastegate and a plx wideband setup for down the road, they were just so cheap I had to get them.
I didn't think anyone was really that interested in pics of a trans...
Trans went together pretty well.
The hardparts should be good for 800 horse, the softparts might hold that for a while...The part that worries me the most is the 3800 style input shaft and the converter. but build list is something like
hardened plantaries
.55 boost valve
corvette servo
beast shell
hardnened front drum (stock input drum, fingers crossed)
redline clutches (few extra whereever we could)
firm but not ever firm shiftkit (too hard and Ill just sheer hardparts)
new front pump
new valvebody (got lucky on a never used factory 89 valvebody)
new redline band
I'll put some cheepo deeper oil pan on it and a derale 16 pass cooler, which seems to work great on the ty. I'm hoping that the zero chance I have of really launching this thing with the converter and the size of the turbo should help save the trans. The 2-3 shift will be interesting though.
I also am buying a turbosmart 38mm wastegate and a plx wideband setup for down the road, they were just so cheap I had to get them.
I didn't think anyone was really that interested in pics of a trans...
BMFB
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Re: Turbo 3800 blazer
I got the engine mounts fabbed out mostly. I didnt want to weild them in any final way until I have th trans cross member built, which its about halfway done. I can't finish it until I get my transfercase, just so that I can make sure it clears the front prop shaft and everything. I should have it in the next day or so, and then I can get it finalized.
I ordered the cam (Lift is .544”/.536” with stock rockers. Lobe separation 117 degrees Duration @ .050" is 230°/224°.) as well as the springs, new double timing chain, retainers, gaskets, and some other do dads. I got the gate and the wideband in and they look good, so i am happy.
I decided I am going to have to make my own headers. I think I have a good idea on how I am going to make the collectors and such (collectors scare me the most) the only thing that comforts me is the fact that turbos don't need scavenging.
I still need to buy the fuel items, I'll do that here once I get the rest done, The time its taken to get far astounds me...
I got the engine mounts fabbed out mostly. I didnt want to weild them in any final way until I have th trans cross member built, which its about halfway done. I can't finish it until I get my transfercase, just so that I can make sure it clears the front prop shaft and everything. I should have it in the next day or so, and then I can get it finalized.
I ordered the cam (Lift is .544”/.536” with stock rockers. Lobe separation 117 degrees Duration @ .050" is 230°/224°.) as well as the springs, new double timing chain, retainers, gaskets, and some other do dads. I got the gate and the wideband in and they look good, so i am happy.
I decided I am going to have to make my own headers. I think I have a good idea on how I am going to make the collectors and such (collectors scare me the most) the only thing that comforts me is the fact that turbos don't need scavenging.
I still need to buy the fuel items, I'll do that here once I get the rest done, The time its taken to get far astounds me...
BMFB
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Re: Turbo 3800 blazer
Some progress has been had
Here is a pic of the cam and some of the parts I've been slowly collecting. I also have the wastegate and a plx wideband setup not pictured. I have most the gaskets, cam, springs, timing set, valve seals, camaro intake, shocks, lowering blocks, zq8 QR steering box, bw 4472 awd transfer case out of a scrapped typhoon, and a few other odds and ends. I still need quite a few parts, and I can't wait to dig in and get the exhaust made...next is to pull the motor out and start on the rebuild. I will prolly start in on the wiring harness while thats being donel. The only machine work really being done is the milling and building of the heads for a set of cometic gaskets. Rat Tech will be doing the work, and I may have him do some port work while he's in there.
I thought this cam was note worthy
trans crossmember I made from some plate and pipe I bought off some country singers, it took alot of work to get it to fit around the torsion bars...
While I was at work today my dad finished the engine mounts which was very cool. he's retired, and bored, and it turns out he does good work. Heres some before and after on them, they need to be taken out and some finish work done, but they're basically done.
its amazing how far a sawzall and a 40 year arc wielder can get you...
Some progress has been had
Here is a pic of the cam and some of the parts I've been slowly collecting. I also have the wastegate and a plx wideband setup not pictured. I have most the gaskets, cam, springs, timing set, valve seals, camaro intake, shocks, lowering blocks, zq8 QR steering box, bw 4472 awd transfer case out of a scrapped typhoon, and a few other odds and ends. I still need quite a few parts, and I can't wait to dig in and get the exhaust made...next is to pull the motor out and start on the rebuild. I will prolly start in on the wiring harness while thats being donel. The only machine work really being done is the milling and building of the heads for a set of cometic gaskets. Rat Tech will be doing the work, and I may have him do some port work while he's in there.
I thought this cam was note worthy
trans crossmember I made from some plate and pipe I bought off some country singers, it took alot of work to get it to fit around the torsion bars...
While I was at work today my dad finished the engine mounts which was very cool. he's retired, and bored, and it turns out he does good work. Heres some before and after on them, they need to be taken out and some finish work done, but they're basically done.
its amazing how far a sawzall and a 40 year arc wielder can get you...
BMFB
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Re: Turbo 3800 blazer
I pulled the motor out of it last night and pulled the intake and heads off of it. Heads look good, and the cross hatch is still cut into the cylinder walls (I couldn't believe it). I talked to my machine shop today and I'll drop them off there tomorrow and should have them back sometime next week.
I pulled the trans as well and made sure that the T-case was the right spline count, just my luck, it was :tup: Thanks again on that ken, I know it was a pain in the ass to get your hands on.
I talked to a couple friends of mine and got my hands on a set of cometic gaskets for it, I am hoping to have those soon. I'd like to build the motor over the weekend and have it together by the next weekend and put it back in. I want to start fabbing the exhaust and the trans tunnel. I have been doing some research on how to build headers, so wish me luck.
While this is all apart I think I'm gonna pull the trans cross member out and redo the welds, I didn't care much about it at the time, but I look back and its pretty knarly. Some of the gaps I filled were HUGE and I wasn't using the thickest rod, a second layer wouldn't hurt...
I pulled the motor out of it last night and pulled the intake and heads off of it. Heads look good, and the cross hatch is still cut into the cylinder walls (I couldn't believe it). I talked to my machine shop today and I'll drop them off there tomorrow and should have them back sometime next week.
I pulled the trans as well and made sure that the T-case was the right spline count, just my luck, it was :tup: Thanks again on that ken, I know it was a pain in the ass to get your hands on.
I talked to a couple friends of mine and got my hands on a set of cometic gaskets for it, I am hoping to have those soon. I'd like to build the motor over the weekend and have it together by the next weekend and put it back in. I want to start fabbing the exhaust and the trans tunnel. I have been doing some research on how to build headers, so wish me luck.
While this is all apart I think I'm gonna pull the trans cross member out and redo the welds, I didn't care much about it at the time, but I look back and its pretty knarly. Some of the gaps I filled were HUGE and I wasn't using the thickest rod, a second layer wouldn't hurt...
BMFB
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Re: Turbo 3800 blazer
I dropped my heads off at the machine shop today and talked to my machine guy for a while. Cool guy, great machinist, hates the government (i'm on his side). Says he can have them back by the end of next week. I told him to machine them for cometics (50 ra, I believe is the correct way to say it, he knew what I was talking about and said it would be good). tonight I plan on either taking the cross member out and rewelding it, and starting in on the wiring, or taking the turbo off of my typhoon and taking that apart to see what happened to it.
Also not sure if I mentioned this, but me and a friend rebuilt the trans. Beast shell, hardend planitarys, input shaft, and output shaft. Red line clutches (except reverse, for some reason) and thicker shell. Valve body was pulled out of a newer trans and is apparintly a great valve body which we modified (as well as the plate) to shift a bit (lot) firmer. The servo is a 3 puck and the boost valve is now a .50 so help it hold the shifts. The input shaft scares me to death, but I'm gonna roll with it and see how it does, its harder than stock, but man its about the size of a splined cheese stick, and I don't know what it can do...
Big fun...
I dropped my heads off at the machine shop today and talked to my machine guy for a while. Cool guy, great machinist, hates the government (i'm on his side). Says he can have them back by the end of next week. I told him to machine them for cometics (50 ra, I believe is the correct way to say it, he knew what I was talking about and said it would be good). tonight I plan on either taking the cross member out and rewelding it, and starting in on the wiring, or taking the turbo off of my typhoon and taking that apart to see what happened to it.
Also not sure if I mentioned this, but me and a friend rebuilt the trans. Beast shell, hardend planitarys, input shaft, and output shaft. Red line clutches (except reverse, for some reason) and thicker shell. Valve body was pulled out of a newer trans and is apparintly a great valve body which we modified (as well as the plate) to shift a bit (lot) firmer. The servo is a 3 puck and the boost valve is now a .50 so help it hold the shifts. The input shaft scares me to death, but I'm gonna roll with it and see how it does, its harder than stock, but man its about the size of a splined cheese stick, and I don't know what it can do...
Big fun...
BMFB
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Re: Turbo 3800 blazer
After a long fight I got the harmonic balancer off the front of the motor and I got the front cover off. After which I very carefully pulled the cam out along with the lifters (not in that order). The cam looked good, no scratches or anything out of the ordinary and the lifters all looked good as well. I cleaned the top of the motor the best I could and oiled up the cam with some assembly lube and put it in...
The lifters went in with no issue and I was carefull to keep them in the same place, rolling in the same direction. The girdles also got cleaned and reinstalled. The real trick was getting the new double roller timing gear on. It didn't want to just slide so I had to pound it on with a socket and a hammer, and with the help of some oil it moved with just a touch of effort. it took me 2 trys to get the cam side on correctly, and it was a bit more tricky than I'm used to , just because its a key'd shaft instead of a bolt on gear. I eliminated the balance shaft...
I used the multi gasket trick to get clearance fron the double timing chain to the front cover, and put it back on after cleaning it up a bit. I also replaced the gasket for the oil filter adapter and the front crank seal. I need to drill out the oil pan for a turbo return line, not sure of the best way to go about it yet.
I talked to a friend of mine and found a good way to make a collector, so thats a plus. He offered to do any tig weilding I needed on the headers and the oil pan as well as the construction of the collectors themselves.
After a long fight I got the harmonic balancer off the front of the motor and I got the front cover off. After which I very carefully pulled the cam out along with the lifters (not in that order). The cam looked good, no scratches or anything out of the ordinary and the lifters all looked good as well. I cleaned the top of the motor the best I could and oiled up the cam with some assembly lube and put it in...
The lifters went in with no issue and I was carefull to keep them in the same place, rolling in the same direction. The girdles also got cleaned and reinstalled. The real trick was getting the new double roller timing gear on. It didn't want to just slide so I had to pound it on with a socket and a hammer, and with the help of some oil it moved with just a touch of effort. it took me 2 trys to get the cam side on correctly, and it was a bit more tricky than I'm used to , just because its a key'd shaft instead of a bolt on gear. I eliminated the balance shaft...
I used the multi gasket trick to get clearance fron the double timing chain to the front cover, and put it back on after cleaning it up a bit. I also replaced the gasket for the oil filter adapter and the front crank seal. I need to drill out the oil pan for a turbo return line, not sure of the best way to go about it yet.
I talked to a friend of mine and found a good way to make a collector, so thats a plus. He offered to do any tig weilding I needed on the headers and the oil pan as well as the construction of the collectors themselves.
![Quickstop [UK]](/forums/data/avatars/m/5/5165.jpg?1570199786){kind=avatar}
Quickstop [UK]
Combating adversyty.
Re: Turbo 3800 blazer
Why did you do a 3.8 with this build? Impressive work!
:tup:
Why did you do a 3.8 with this build? Impressive work!
:tup:
BMFB
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Re: Turbo 3800 blazer
I went with the 3800 for a few reasons. I have been hearing for years that the 3800's were some of the strongest motors that gm had built (up until the ls-series). There are a few people around here that have stock bottom end motors that are pushing some big power out of some simple setups. zzp's got a grand prix running over 850hp on what they claim is a stock bottom end motor (debated) but after talking to a few people and seing what I have seen I thought I would try my hand and see what could really be done.
The motors are so cheap that its not even really a problem if I blow it up as long as the cam and timing gear survives (I got this one for free basically). The part i am truly worried about is the trans, I'm not gonna be able to really launch this truck, but I'm ok with that.
The other reason I went this was was weight. The motor is alot lighter than the 4.3, and way lighter than a 350 (prolly not lighter than an ls, but for the money, I'm ok with that)
This really is an experiment...I still need to clean those trans crossmember welds up...
I went with the 3800 for a few reasons. I have been hearing for years that the 3800's were some of the strongest motors that gm had built (up until the ls-series). There are a few people around here that have stock bottom end motors that are pushing some big power out of some simple setups. zzp's got a grand prix running over 850hp on what they claim is a stock bottom end motor (debated) but after talking to a few people and seing what I have seen I thought I would try my hand and see what could really be done.
The motors are so cheap that its not even really a problem if I blow it up as long as the cam and timing gear survives (I got this one for free basically). The part i am truly worried about is the trans, I'm not gonna be able to really launch this truck, but I'm ok with that.
The other reason I went this was was weight. The motor is alot lighter than the 4.3, and way lighter than a 350 (prolly not lighter than an ls, but for the money, I'm ok with that)
This really is an experiment...I still need to clean those trans crossmember welds up...
BMFB
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Re: Turbo 3800 blazer
I managed to get a couple things done last night. I cleaned off my cometics and installed them with a healthy layer of copper. I cleaned the heads up, installed the studs, and torqued them down to 90ft/lbs. This week I am going to order all of the stuff for my exhaust and get that going next week, as well as a few odds and ends. I would like to get the exhaust finished, the oil pan tapped, and the fab work I need to do for the belt to get done.
a few pics from last night.
Something that has been really bothering me about this whole build is my trans selection. I really thought (and still somewhat fear) that the input shaft of the trans was simply to small to be able to support what I was doing. Last night I compaired the size of the input shaft of my 700 to one of my turbo 400's and I was amazed to see that they were nearly the same size. The 400 was a big larger, but not by much, maybe an 1/8 of an inch, and the wall thickness seemed to be the same.
I managed to get a couple things done last night. I cleaned off my cometics and installed them with a healthy layer of copper. I cleaned the heads up, installed the studs, and torqued them down to 90ft/lbs. This week I am going to order all of the stuff for my exhaust and get that going next week, as well as a few odds and ends. I would like to get the exhaust finished, the oil pan tapped, and the fab work I need to do for the belt to get done.
a few pics from last night.
Something that has been really bothering me about this whole build is my trans selection. I really thought (and still somewhat fear) that the input shaft of the trans was simply to small to be able to support what I was doing. Last night I compaired the size of the input shaft of my 700 to one of my turbo 400's and I was amazed to see that they were nearly the same size. The 400 was a big larger, but not by much, maybe an 1/8 of an inch, and the wall thickness seemed to be the same.
BMFB
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Re: Turbo 3800 blazer
just a short no-pic update...
I've gotten the intake on and the pushrods/rockers. I wasn't sure on how to prep the rockers correctly so i soaked them in fresh oil for a while before I installed them to try an get oil into the bearings.
I managed to get my bung in the oil pan for the oil return line. I accomplished this with a 3/4 brass fitting, a couple washers, 2 o-rings, and a while bunch of oil resistant permatex, and a couple nuts. From what I can tell it'll never leak, but at worst I can't see it leaking anything significant...only thing that really bothered me is that the pan is actually 2 pieces of steel formed one on top of the other, and I tried my best to spread the 2 layers out and fill them with permatex, and then crush them together with 2 pairs of vice grips before threading the fitting into them and tightning it down.
Turns out I was wrong about the gtp alternator bracket fitting with the camaro intake, I need to go out and find a camaro alternator here today or tomorrow.
the pipe I bought won't be here until thursday, but i am hoping to have everything I need to get it going right when it shows up to the door.
just a short no-pic update...
I've gotten the intake on and the pushrods/rockers. I wasn't sure on how to prep the rockers correctly so i soaked them in fresh oil for a while before I installed them to try an get oil into the bearings.
I managed to get my bung in the oil pan for the oil return line. I accomplished this with a 3/4 brass fitting, a couple washers, 2 o-rings, and a while bunch of oil resistant permatex, and a couple nuts. From what I can tell it'll never leak, but at worst I can't see it leaking anything significant...only thing that really bothered me is that the pan is actually 2 pieces of steel formed one on top of the other, and I tried my best to spread the 2 layers out and fill them with permatex, and then crush them together with 2 pairs of vice grips before threading the fitting into them and tightning it down.
Turns out I was wrong about the gtp alternator bracket fitting with the camaro intake, I need to go out and find a camaro alternator here today or tomorrow.
the pipe I bought won't be here until thursday, but i am hoping to have everything I need to get it going right when it shows up to the door.
BMFB
Not to scale
Re: Turbo 3800 blazer
so this was a difficult decison to share this, because i know its gonna get flamed.
anyway, this is what I have come up with for an exhaust. I'm pretty happy with it. I have a couple people that have looked at it and say they would be happy to donate time into tig welding them up for me and think they can get them looking very good in the end. I made these with a grinder, sawzall, chop saw, and a dye grinder, and toilet paper rolls...keep in mind this is my first time ever trying anything like this...
This was easily the most difficult part, and took me about 4 hours of grinding and checking. I don't have any pics of the inside, but it looks about perfect.
down pipe is going to be a 4 inch dump coming out of the fender. I hope to have these finished by the end of this next week. let me know what you think
so this was a difficult decison to share this, because i know its gonna get flamed.
anyway, this is what I have come up with for an exhaust. I'm pretty happy with it. I have a couple people that have looked at it and say they would be happy to donate time into tig welding them up for me and think they can get them looking very good in the end. I made these with a grinder, sawzall, chop saw, and a dye grinder, and toilet paper rolls...keep in mind this is my first time ever trying anything like this...
This was easily the most difficult part, and took me about 4 hours of grinding and checking. I don't have any pics of the inside, but it looks about perfect.
down pipe is going to be a 4 inch dump coming out of the fender. I hope to have these finished by the end of this next week. let me know what you think
The Bronze
New member
Re: Turbo 3800 blazer
I won't make fun of someone doing the work themselves. My only observations are with that much "leverage", will you have the turbo hard-mounted to the body? If so, you should have flex-pipe in line, unless the engine is also mounted solidly to the frame. Also, what thickness of pipe are you running?
Personally, I will be there soon enough as I am also custom fabbing some exhaust to add a turbo to my Early Bronco.
I won't make fun of someone doing the work themselves. My only observations are with that much "leverage", will you have the turbo hard-mounted to the body? If so, you should have flex-pipe in line, unless the engine is also mounted solidly to the frame. Also, what thickness of pipe are you running?
Personally, I will be there soon enough as I am also custom fabbing some exhaust to add a turbo to my Early Bronco.
BMFB
Not to scale
Re: Turbo 3800 blazer
Its 16 gauge stainless (304 IIR). I have thought about putting at least some kind of brace in there to help it out. Its not too far off of the pass side, but something even supporting it halfway up there couldn't hurt. The motor is being mounted solidly to the frame but even then I know the whole thing is gonna flex with the torque I'm putting onto it.
I will say that the first picture is kind of an illusion, it makes it look like the turbo is way far away from the motor but its not at all, its just the turbo is half the size of the block. the second pic is better for scale, you can see the turbo might be 14 inches away form the #2 cylinder pipe.
Its 16 gauge stainless (304 IIR). I have thought about putting at least some kind of brace in there to help it out. Its not too far off of the pass side, but something even supporting it halfway up there couldn't hurt. The motor is being mounted solidly to the frame but even then I know the whole thing is gonna flex with the torque I'm putting onto it.
I will say that the first picture is kind of an illusion, it makes it look like the turbo is way far away from the motor but its not at all, its just the turbo is half the size of the block. the second pic is better for scale, you can see the turbo might be 14 inches away form the #2 cylinder pipe.
BMFB
Not to scale
Re: Turbo 3800 blazer
I got the last couple parts of the exhaust buttoned up. It came out pretty good and I'm happy with it. The pipe coming out of the gate is 1 5/8's mild and I just pointed it out of the driver side fender. The pipe coming out of the turbo does a bend and comes out of the pass. fender, and its 4 inch mild held on to the turbo with a 4 inch mild v-band setup. I think I like the way it looks, its hard to tell because the truck is still sitting up so high. I tried to keep both pipes with a decent downhill slope to them so that water can't run into the system. I couldn't get more than about 8 degrees with the 4 inch so I might have to drill a weep hole.
I had my neighbor look at it and he said he could do it for about 120 dollars, but I might look a couple other places to see where I can have it done.
gate coming off of the driver side pipe and exhausting towards the drivers fender. I made sure to have clearance on the steering box and i should be able to get hoses down in there with no problem. It should clear the radiator by at least 4 inches so I might be able to sneak a fan in there with comfort. There is room to move the radiator forward if I need to.
Its ugly, but remember, that's part of the fun.
I got the last couple parts of the exhaust buttoned up. It came out pretty good and I'm happy with it. The pipe coming out of the gate is 1 5/8's mild and I just pointed it out of the driver side fender. The pipe coming out of the turbo does a bend and comes out of the pass. fender, and its 4 inch mild held on to the turbo with a 4 inch mild v-band setup. I think I like the way it looks, its hard to tell because the truck is still sitting up so high. I tried to keep both pipes with a decent downhill slope to them so that water can't run into the system. I couldn't get more than about 8 degrees with the 4 inch so I might have to drill a weep hole.
I had my neighbor look at it and he said he could do it for about 120 dollars, but I might look a couple other places to see where I can have it done.
gate coming off of the driver side pipe and exhausting towards the drivers fender. I made sure to have clearance on the steering box and i should be able to get hoses down in there with no problem. It should clear the radiator by at least 4 inches so I might be able to sneak a fan in there with comfort. There is room to move the radiator forward if I need to.
Its ugly, but remember, that's part of the fun.
BMFB
Not to scale
Re: Turbo 3800 blazer
Last night I managed to get the gas tank out of it with the help of some friends, whichw as nice because it was one muddy bitch. I ended up just cutting the straps off, they were way too rusted. Tonight I'm gonna work on getting them out of there with some heat and oil. I also managed to finish all the grinding on the headers.
I also managed to get a good start on the wiring harness with the help from a friend whos been through a few of these before.. I've got the power wires seporated that I need to run power too, and the engine harness is basically ready to plug in. I need to go through and de-pin alot of the transmission wires and such from the PCM connectors, just because there are wayyyy to many of them to just leave hangin out.
Tonight I plan on being out there again. I want to get those bolts out of the gas tank, and get the T-case mounted, and take a look at what the seats are going to take. Its a strange transition from fabrication to final assembily of some of the parts. Its weird to start wiring it for some reason...
Last night I managed to get the gas tank out of it with the help of some friends, whichw as nice because it was one muddy bitch. I ended up just cutting the straps off, they were way too rusted. Tonight I'm gonna work on getting them out of there with some heat and oil. I also managed to finish all the grinding on the headers.
I also managed to get a good start on the wiring harness with the help from a friend whos been through a few of these before.. I've got the power wires seporated that I need to run power too, and the engine harness is basically ready to plug in. I need to go through and de-pin alot of the transmission wires and such from the PCM connectors, just because there are wayyyy to many of them to just leave hangin out.
Tonight I plan on being out there again. I want to get those bolts out of the gas tank, and get the T-case mounted, and take a look at what the seats are going to take. Its a strange transition from fabrication to final assembily of some of the parts. Its weird to start wiring it for some reason...