Stock downpipe flange
- Thread starter Bustedsm
- Start date
turbodig
Active member
Re: Stock downpipe flange
You'd have to pull the plug, remove the arm and flapper, plug the hole for the arm, machine the hole the flapper covered to take a section of pipe, weld that pipe into the housing to seal it, and finally, build a mounting flange to mount the external.
Doesn't sound easy or cheap to me.
Much easier - remove the crossover, weld a flange on it, mount the External WG there.
Spot weld the WG flapper arm on the housing shut.
Issue with the stock flange and 3" pipe becomes clearance around the bolt holes. You can use stainless allen cap screws instead of the studs to alleviate this.
Many people are surprised to find that bolting a 3" pipe instead of the 2.5" pipe doesn't gain you much.
The real gains come in the freeing up of the exhaust side of the housing, and getting rid of a WG flow path that exits perpendicular to the flow coming out of the turbine.
You'd have to pull the plug, remove the arm and flapper, plug the hole for the arm, machine the hole the flapper covered to take a section of pipe, weld that pipe into the housing to seal it, and finally, build a mounting flange to mount the external.
Doesn't sound easy or cheap to me.
Much easier - remove the crossover, weld a flange on it, mount the External WG there.
Spot weld the WG flapper arm on the housing shut.
Issue with the stock flange and 3" pipe becomes clearance around the bolt holes. You can use stainless allen cap screws instead of the studs to alleviate this.
Many people are surprised to find that bolting a 3" pipe instead of the 2.5" pipe doesn't gain you much.
The real gains come in the freeing up of the exhaust side of the housing, and getting rid of a WG flow path that exits perpendicular to the flow coming out of the turbine.
Darin
New member
Re: Stock downpipe flange
The crossover isn't the best place to run a WG off of either. One bank of the engine would be breathing easier than the other. External gate off of a stock turbo setup on a Syty would be difficult as was mentioned above, the wastegate path is sorta within the turbine housing itself, hard to describe until you see it yourself. It could be done, but I feel better gains would be found using a spacer of sort between the turbo and manifold, mounting a gate (or 2 if staying divided) and remake the downpipe to fit. That's my plan, anyways.
I know exaclty what you're trying to accomplish, similar to the FP series of turbos and the green/red. Interesting off topic: Green has the same turbine wheel as the stock Ty, and a red is a TD06H, same as the typical 20G upgrade. The super 20G that Hahn used to sell is a Syty turbine housing'ed (10cm) 20G, off the shelf. The green really has me thinking as it'll just slap into a stock ty housing...
FYI, I'm an ex-dsm'er or MANY years, 15 or so
The crossover isn't the best place to run a WG off of either. One bank of the engine would be breathing easier than the other. External gate off of a stock turbo setup on a Syty would be difficult as was mentioned above, the wastegate path is sorta within the turbine housing itself, hard to describe until you see it yourself. It could be done, but I feel better gains would be found using a spacer of sort between the turbo and manifold, mounting a gate (or 2 if staying divided) and remake the downpipe to fit. That's my plan, anyways.
I know exaclty what you're trying to accomplish, similar to the FP series of turbos and the green/red. Interesting off topic: Green has the same turbine wheel as the stock Ty, and a red is a TD06H, same as the typical 20G upgrade. The super 20G that Hahn used to sell is a Syty turbine housing'ed (10cm) 20G, off the shelf. The green really has me thinking as it'll just slap into a stock ty housing...
FYI, I'm an ex-dsm'er or MANY years, 15 or so
Darin
New member
Re: Stock downpipe flange
It's possible, but more work than you would expect due to the weird wastegate setup. On the DSM O2 housings the wastegate gases are routed back into the exhaust main stream in the housing, On a Syty, they are routed back in inside of the turbine housing themselves. You would need to block off the internal passage with a pipe, weld that to the cast iron (a bitch, to be honest) and then go about making the piece that you have shown above.
Best advice I can give is to actually look at the housing then decide if it's worth the effort. I personally feel that it isn't for the gains that you'd be after.
It's possible, but more work than you would expect due to the weird wastegate setup. On the DSM O2 housings the wastegate gases are routed back into the exhaust main stream in the housing, On a Syty, they are routed back in inside of the turbine housing themselves. You would need to block off the internal passage with a pipe, weld that to the cast iron (a bitch, to be honest) and then go about making the piece that you have shown above.
Best advice I can give is to actually look at the housing then decide if it's worth the effort. I personally feel that it isn't for the gains that you'd be after.
Bustedsm
Numbered Car Crazy
Re: Stock downpipe flange
I just want to utilize a little higher flowing exhaust and hopefully find some sort of better wastegate management. The car over boosts a little right now (somewhere in the neighborhood of 15-16lbs max) but I'm going to tune it for that with Code59
I just want to utilize a little higher flowing exhaust and hopefully find some sort of better wastegate management. The car over boosts a little right now (somewhere in the neighborhood of 15-16lbs max) but I'm going to tune it for that with Code59
The Devils Own Chariot
Active member
Re: Stock downpipe flange
http://cgi.ebay.com/ebaymotors/OBX-...ptZMotorsQ5fCarQ5fTruckQ5fPartsQ5fAccessories
http://cgi.ebay.com/ebaymotors/OBX-...ptZMotorsQ5fCarQ5fTruckQ5fPartsQ5fAccessories
Bustedsm
Numbered Car Crazy
Re: Stock downpipe flange
Aren't factory exhaust systems 2.5" already? I have to figure out something with this stock turbo setup. The open downpipe is cool and all but it's ratty and rusty
Aren't factory exhaust systems 2.5" already? I have to figure out something with this stock turbo setup. The open downpipe is cool and all but it's ratty and rusty
JSM
Active member
Re: Stock downpipe flange
On occasion I make a 3" dp for the stock turbo. It includes an oval flange so that the puck and everything between the puck and outlet can be removed. This works extremely well.
Another thing people forget is the stock system includes the program in the ECM, if you change mufflers, remove a cat etc you have changed the system and the ECM setting just may need to be changed also. Code59 will help you get into those settings but by itself won't fix your problem.
At nats Dig and I have a section planned on boost tuning also.
On occasion I make a 3" dp for the stock turbo. It includes an oval flange so that the puck and everything between the puck and outlet can be removed. This works extremely well.
Another thing people forget is the stock system includes the program in the ECM, if you change mufflers, remove a cat etc you have changed the system and the ECM setting just may need to be changed also. Code59 will help you get into those settings but by itself won't fix your problem.
At nats Dig and I have a section planned on boost tuning also.
Bustedsm
Numbered Car Crazy
Re: Stock downpipe flange
How much would you charge to make an oval flange setup just enough to where I can weld up my own downpipe? Thanks
How much would you charge to make an oval flange setup just enough to where I can weld up my own downpipe? Thanks
burmeister
Today forecast High Winds
Re: Stock downpipe flange
so you can make a 3" downpipe from the stock turbo into my soon to be atr 3" cat back exhaust?
so you can make a 3" downpipe from the stock turbo into my soon to be atr 3" cat back exhaust?
burmeister
Today forecast High Winds
Re: Stock downpipe flange
twin put me down for one i want to run the stock to 3" so im good for one...rob
twin put me down for one i want to run the stock to 3" so im good for one...rob
Bustedsm
Numbered Car Crazy
Re: Stock downpipe flange
No thanks, I want to remove that stupid puck on the hotside, what a horrible idea!
No thanks, I want to remove that stupid puck on the hotside, what a horrible idea!