Turbo 3800 blazer
- Thread starter BMFB
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warmpancakes
New member
Re: Turbo 3800 blazer
so where the pics of the new diff
so where the pics of the new diff
BMFB
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Re: Turbo 3800 blazer
Thanks guy!
I did an autox with it, and it took a bit of getting used to but it drove pretty well. I had the wrong tires on it for the temp...
Went to the strip again and managed an 11.005@134.5, with a 2.1 60ft. That time I gave no effort on getting it to spool off the line, just to help keep heat off the trans while i tuned the rest of the truck. It never really made a clean pass tune wise. I was having some issues with it breaking up rich when it would shift, and then on my final pass my coolant res. blew open and sprayed my filter with coolant, which made its way into the motor...causing alot of knock retard...
But the motor seems ok otherwise.
I decided to go through the thing and re-torque the heads. I knew i was getting some exhuast leaks and knew I could do better on sealing a few things up so I went after that as well. What I found explains alot of my spooling issues I think...3 cracks. one off the pass. side hot pipe right after cyl. 2, one off the drivers hot pipe off cyl.1 and one on the gate. I belive that the two of the cyl. 1 and 2 were cause by my downpipe/muffler. While autoxing the mount that holds the weight of it broke, and the turbo was supporting the full weight of the exhaust. this broke the brace I had holding the turbo up, as well as the pipes holding the turb to the motor. One of them was broken nearly in half. The gate was likely caused by teh fact that the dump goes out of the fender, and just rattles like hell on the fender and probably gets more force put on it than i originally thought by the fender when it moves around. I am going to install a flex onto it, or just cut it off and let it dump behind the fender somwhere.
Had a few head bolts that were less than torqued, Glad I went through them.
After I get it all back together tonight I am going to see if the turbo spools a bit better with its newly sealed exhaust.
Thanks guy!
I did an autox with it, and it took a bit of getting used to but it drove pretty well. I had the wrong tires on it for the temp...
Went to the strip again and managed an 11.005@134.5, with a 2.1 60ft. That time I gave no effort on getting it to spool off the line, just to help keep heat off the trans while i tuned the rest of the truck. It never really made a clean pass tune wise. I was having some issues with it breaking up rich when it would shift, and then on my final pass my coolant res. blew open and sprayed my filter with coolant, which made its way into the motor...causing alot of knock retard...
But the motor seems ok otherwise.
I decided to go through the thing and re-torque the heads. I knew i was getting some exhuast leaks and knew I could do better on sealing a few things up so I went after that as well. What I found explains alot of my spooling issues I think...3 cracks. one off the pass. side hot pipe right after cyl. 2, one off the drivers hot pipe off cyl.1 and one on the gate. I belive that the two of the cyl. 1 and 2 were cause by my downpipe/muffler. While autoxing the mount that holds the weight of it broke, and the turbo was supporting the full weight of the exhaust. this broke the brace I had holding the turbo up, as well as the pipes holding the turb to the motor. One of them was broken nearly in half. The gate was likely caused by teh fact that the dump goes out of the fender, and just rattles like hell on the fender and probably gets more force put on it than i originally thought by the fender when it moves around. I am going to install a flex onto it, or just cut it off and let it dump behind the fender somwhere.
Had a few head bolts that were less than torqued, Glad I went through them.
After I get it all back together tonight I am going to see if the turbo spools a bit better with its newly sealed exhaust.
![Quickstop [UK]](/forums/data/avatars/m/5/5165.jpg?1570199786){kind=avatar}
Quickstop [UK]
Combating adversyty.
Re: Turbo 3800 blazer
This is an awesome build and a great thread - that 3.8 is putting out some power! Must be a lot of fun!
This is an awesome build and a great thread - that 3.8 is putting out some power! Must be a lot of fun!
BMFB
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Re: Turbo 3800 blazer
nah, just for fun. I wasnt sure I could beat him, super wrong.
Anyway, I have been tracking that misfire. It seems to have been the ICM. They go out occasionally. This one has messed with me though, I thought i fixed it 3 days ago and it came back the next day...last night it was great so today Ill see if it remains that way. if it does i need to install my zex kit and hit the track tomorrow.
nah, just for fun. I wasnt sure I could beat him, super wrong.
Anyway, I have been tracking that misfire. It seems to have been the ICM. They go out occasionally. This one has messed with me though, I thought i fixed it 3 days ago and it came back the next day...last night it was great so today Ill see if it remains that way. if it does i need to install my zex kit and hit the track tomorrow.
BMFB
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Re: Turbo 3800 blazer
had fun with it this weekend.
after trying to race a G8 but scaring him off the highway instead. I noticed a clicking noise coming from the front end later that night. I thought it was the front axle but I found that the driverside CV axle had about 1/4 inch up and down play. Autozone gold lasted about 3 months.
That being said I am replacing it with another free autozone gold today and hoping that was my clunk.
I installed a nitrous system over the weekend. I couldnt get the bottle filled until yesterday...but I held off on trying it until the front end isnt broke.
Im running a dry shot straight into the turbo. My goal is to spray a small shot on the line to use it to spool the bitch so I can launch better. I can achieve a 10psi launch on brakes now, but it takes awhile and isnt really usefull.
My initial thought was to run a 40 shot but, on second thought that might be huge. I'm not sure how that stuff is rated but 40 shot ususally means 40 hp worth of nitrous, on a v8, at probably 5k+ rpm. cut 1/3 off the displacement and rpm in half and that 40 shot starts to look pretty significant....might start with something closer to a 15 and work my way up to be safe.
had fun with it this weekend.
after trying to race a G8 but scaring him off the highway instead. I noticed a clicking noise coming from the front end later that night. I thought it was the front axle but I found that the driverside CV axle had about 1/4 inch up and down play. Autozone gold lasted about 3 months.
That being said I am replacing it with another free autozone gold today and hoping that was my clunk.
I installed a nitrous system over the weekend. I couldnt get the bottle filled until yesterday...but I held off on trying it until the front end isnt broke.
Im running a dry shot straight into the turbo. My goal is to spray a small shot on the line to use it to spool the bitch so I can launch better. I can achieve a 10psi launch on brakes now, but it takes awhile and isnt really usefull.
My initial thought was to run a 40 shot but, on second thought that might be huge. I'm not sure how that stuff is rated but 40 shot ususally means 40 hp worth of nitrous, on a v8, at probably 5k+ rpm. cut 1/3 off the displacement and rpm in half and that 40 shot starts to look pretty significant....might start with something closer to a 15 and work my way up to be safe.
89shortbox
Member
Re: Turbo 3800 blazer
40 hp is 40hp on any nitrous kit. It has nothing to do with the engine size.
If you just need to get up on boost use a hobbs switch to turn the kit off .
I have an 80shot setup on a 4.3 that turns off at 9 psi and runs 15 psi once it lit up. Cant even feel it shut off.
40 hp is 40hp on any nitrous kit. It has nothing to do with the engine size.
If you just need to get up on boost use a hobbs switch to turn the kit off .
I have an 80shot setup on a 4.3 that turns off at 9 psi and runs 15 psi once it lit up. Cant even feel it shut off.
BMFB
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Re: Turbo 3800 blazer
I bought some new shoes for the truck. I bought the ugliest, stupidest, bestest wheels I could think of...10 inch wide aluminum salad shooters. I bought a new set of tires for the first timein a long time. I managed to get a deal on 4 new conti extreme contact dws 275x40x17's, mounted them and tried them out last night. They grab really well for an all terrain tire.
I was forced to buy a second trans cooler. my temps get really high after a few hot laps on the strip or a few autox runs...this second cooler should do the trick, its a big powered derale cooler like what I run on the typhoon. I also got my launch issues firgured out thanks to a 40 shot coming on during brake boosting.
Tonight I am going to mount my sway bar on the rear to help stiffen it up a bit. It didnt do bad at the first autox I did, but I think this will help.
I bought some new shoes for the truck. I bought the ugliest, stupidest, bestest wheels I could think of...10 inch wide aluminum salad shooters. I bought a new set of tires for the first timein a long time. I managed to get a deal on 4 new conti extreme contact dws 275x40x17's, mounted them and tried them out last night. They grab really well for an all terrain tire.
I was forced to buy a second trans cooler. my temps get really high after a few hot laps on the strip or a few autox runs...this second cooler should do the trick, its a big powered derale cooler like what I run on the typhoon. I also got my launch issues firgured out thanks to a 40 shot coming on during brake boosting.
Tonight I am going to mount my sway bar on the rear to help stiffen it up a bit. It didnt do bad at the first autox I did, but I think this will help.
BMFB
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Re: Turbo 3800 blazer
Pics of the tires
Last night I pulled the rear axle apart. To y suprise there was fluid in it still, and everything was in good shape with the exception of the seal on the driverside tube. With some tools I rented from the zone I had it replaced pretty quickly. The axle wear surface for the bearing looked good, so I just replaced the bearing and seal and put it back together.
Also, its an open diff..its amazing to me what this thing has taken for abuse,
Also, I installed a rear sway bar.
I took it for a test drive and the axle didn't fall out or anything so that shoudl be good. The rear sway bar made the truck seem even more like a big go-cart. I cannot wait for the autox this weekend.
Pics of the tires
Last night I pulled the rear axle apart. To y suprise there was fluid in it still, and everything was in good shape with the exception of the seal on the driverside tube. With some tools I rented from the zone I had it replaced pretty quickly. The axle wear surface for the bearing looked good, so I just replaced the bearing and seal and put it back together.
Also, its an open diff..its amazing to me what this thing has taken for abuse,
Also, I installed a rear sway bar.
I took it for a test drive and the axle didn't fall out or anything so that shoudl be good. The rear sway bar made the truck seem even more like a big go-cart. I cannot wait for the autox this weekend.
BMFB
Not to scale
Re: Turbo 3800 blazer
I ran a second autox with the truck over the last weekend. I did pretty well, although I noticed a few problems with the setup. Although I have a rear sway bar and the truck is lighter it still sways like hell. And normally I am good with sway but with my open diff it causes an unloading issues where I cannot put power down out of a corner hard, and sometimes coming out of a slolom isnt fast.
Those things being said, the rest of the truck did great. I installed a second trans cooler which worked great for keeping temps in check. The truck was controlable, and had good amounts of predictable oversteer off the throttle, and reasonable understeer.
I replaced all of my sway bar bushings front and back with polys. I also re-mounted my rear sway bar...When I mounted it the first time I made the mistake of mounting it with the springs unloaded. Once they would load the geometry was all wrong, so I fixed it. I can feel a differance. There is another autox this monday. I will try to get some footage.
I ran a second autox with the truck over the last weekend. I did pretty well, although I noticed a few problems with the setup. Although I have a rear sway bar and the truck is lighter it still sways like hell. And normally I am good with sway but with my open diff it causes an unloading issues where I cannot put power down out of a corner hard, and sometimes coming out of a slolom isnt fast.
Those things being said, the rest of the truck did great. I installed a second trans cooler which worked great for keeping temps in check. The truck was controlable, and had good amounts of predictable oversteer off the throttle, and reasonable understeer.
I replaced all of my sway bar bushings front and back with polys. I also re-mounted my rear sway bar...When I mounted it the first time I made the mistake of mounting it with the springs unloaded. Once they would load the geometry was all wrong, so I fixed it. I can feel a differance. There is another autox this monday. I will try to get some footage.
BMFB
Not to scale
Re: Turbo 3800 blazer
Thanks LF! So the wheel and tires must be more liked than I thought, I keep getting offers from people to buy them....reasonable offers...Time to get some locking lugs.
Over memorial day weekend I had a couple bolts loosen up on me on one side of the trans. It made alot of noise but nothing seems to be damaged from it...but I didnt get it fixed until after the detroit autox. I'm not sure how they came loose, as they were both crush nuts but they did...so I hit them with some loctite and tightened them back up.
After that I went after alot of vibrations and clatter that the chasis and body makes while its driving down the road. After an hour of taking apart one of the windowns and re-making a body mount I had most of the noises gone. This is one of the better things i have done to the truck for comfort, as it turns out those noises were louder than the engine and exhaust. Its more pleasent to drive, and I might even be able to get a girl to be willing to go for a ride (ha).
I also bought a backup L67 3800 in case i break this one. I am planning on going to the oppie event this weekend, and next weekend id like to go to the xceed bbq, and then an autox thats happeneing the next day.
Thanks LF! So the wheel and tires must be more liked than I thought, I keep getting offers from people to buy them....reasonable offers...Time to get some locking lugs.
Over memorial day weekend I had a couple bolts loosen up on me on one side of the trans. It made alot of noise but nothing seems to be damaged from it...but I didnt get it fixed until after the detroit autox. I'm not sure how they came loose, as they were both crush nuts but they did...so I hit them with some loctite and tightened them back up.
After that I went after alot of vibrations and clatter that the chasis and body makes while its driving down the road. After an hour of taking apart one of the windowns and re-making a body mount I had most of the noises gone. This is one of the better things i have done to the truck for comfort, as it turns out those noises were louder than the engine and exhaust. Its more pleasent to drive, and I might even be able to get a girl to be willing to go for a ride (ha).
I also bought a backup L67 3800 in case i break this one. I am planning on going to the oppie event this weekend, and next weekend id like to go to the xceed bbq, and then an autox thats happeneing the next day.
BMFB
Not to scale
Re: Turbo 3800 blazer
A few months ago I started having coolant issues, coolant was dissappearing randomly. It was not leaking on the ground, or burning, or getting into the crankcase so I figured my shitty res was the issue. This cooing issue started immedietly after the track were I sucked in all that water at the end of the track.
Fast forward to saturday night and I was investigating an exhaust leak. while Im down there I noticed that I had some bubbles coming out of the side of my head. I decided this made sense with my cooling issue, as it also looked like those bubbles were coolant weeping out of the gasket. Last night I pulled it apart (pics later) and found that I twisted my pass. side gasket at some point (probably when I sucked in all that coolant out of my broken res at the track a few months ago) and it has been slowly leaking. I noticed the plug on cyl 2 the plug was wayy brown, from talking to people this goes with burning coolant, or it was running super super rich. Super rich wouldnt have hurt the cyl, ecspecially concidering how well it was running. Everything else looks good. I have a lead on some new gaskets already and I should be able to get the heads re-milled or at least looked at by the end of the week.
Did an autox on sunday (after discovering damaged gasket) and did really well. I ran on all season tires to see if it was possible and although not as fast as a couple of other cars (on slicks) it did really well. all seasons scream
vid!
A few months ago I started having coolant issues, coolant was dissappearing randomly. It was not leaking on the ground, or burning, or getting into the crankcase so I figured my shitty res was the issue. This cooing issue started immedietly after the track were I sucked in all that water at the end of the track.
Fast forward to saturday night and I was investigating an exhaust leak. while Im down there I noticed that I had some bubbles coming out of the side of my head. I decided this made sense with my cooling issue, as it also looked like those bubbles were coolant weeping out of the gasket. Last night I pulled it apart (pics later) and found that I twisted my pass. side gasket at some point (probably when I sucked in all that coolant out of my broken res at the track a few months ago) and it has been slowly leaking. I noticed the plug on cyl 2 the plug was wayy brown, from talking to people this goes with burning coolant, or it was running super super rich. Super rich wouldnt have hurt the cyl, ecspecially concidering how well it was running. Everything else looks good. I have a lead on some new gaskets already and I should be able to get the heads re-milled or at least looked at by the end of the week.
Did an autox on sunday (after discovering damaged gasket) and did really well. I ran on all season tires to see if it was possible and although not as fast as a couple of other cars (on slicks) it did really well. all seasons scream
vid!