3400 turbo ?s

[darkroom]

Today i started to fab up my turbo kit for my 1998 sunfire with a 3400 engine. While i was finding a place to set the turbo i was wonder if it was possible or if anyone has tired to install a single turbo but only use the front exhaust manifold. In other words use the front exhaust manifold to push the turbo (t3) and have the downpipe from the turbo connect back to the rear exhaust manifold. Let me know what you think if it would work or not.
If it does work i'll most likely do this tell i get a rear tgp manifold or a camero 3400 passenger manifold.

[TheProfessor]

im not a turbo expert
but the thought of restricting the exhaust flow of only half your cylinders dosent seem like i good idea to me
plus the lag might be horrible considering you arent making use of all the exhaust force

[sharkey]

there isnt enough flow and will be to much of a "pulse" if you only use one bank. this will result in lag and it wont have enough velocity to spin the turbo right up.

most people that turbo a 660 use a custom crossover pipe and have the turbo in the engine bay. i dont see any reason you couldnt have the turbo off the rear exaust manifold. there should be anough room for the turbo to sit there and run the charge pipe back up.

[vsop4me3.1]

Re: 3400 turbo ?s

Today i started to fab up my turbo kit for my 1998 sunfire with a 3400 engine. While i was finding a place to set the turbo i was wonder if it was possible or if anyone has tired to install a single turbo but only use the front exhaust manifold. In other words use the front exhaust manifold to push the turbo (t3) and have the downpipe from the turbo connect back to the rear exhaust manifold. Let me know what you think if it would work or not.
If it does work i'll most likely do this tell i get a rear tgp manifold or a camero 3400 passenger manifold.

out of curiousity what are the specs on the turbo?

[Guest]

That idea, while being the most unique I have heard yet will not work....well. I'm sure you'd create a pressurized intake (boost) and increae the performance, but there will be some odd tuning issues, due to different loads on each bank of cylinders, the turbine exit being restricted by being forced to run back into the rear manifold, and a few other variables that I'm not finding the words to explain. Over all, bad idea, just do it right or don't do it at all.

Also the Camaro was never equipped with a 3400, and the 3.4 uses a manifold that will not bolt onto a 3400.

[darkroom]

Thanks for the input i'll just cap the rear manifold and try to run my down pipe below and in front of the transmission. Thanks for correcting me The Raven i was going to try to spend time looking into getting a camaro exhaust manifold.

[DEI37]

The Saab 3.0 V6 turbo ran the turbo off the front bank only. I thought that the TGP was this way as well?

[TurboZ24]

The TGP runs off both banks, it's mounted on the crossover and uses a different rear manifold than the stock 3.1. I have seen it done by running off one bank only, but you would need too size the turbine for an engine half the displacement and properly sizing for a 1.6 liter motor wouldn't be the easiest thing too do. Also, on the Saab V6, what HP does it produce? How much boost were they looking for? Too match a small enough turbine up, you would need something on the order of a T25 at biggest, more accurately a T2 probably, which you can't mount too a compressor that's all that large. Maybe a stock T-25 or 14G off a 2.0 eclipse might work.

[DEI37]

I don't know off hand what size turbo Saab used. It made 200hp.

[dbtk2]

The only time I would ever think of running a turbo off of just one bank is if you had twin turbo's. It would be sweet to fab up a twin T25 or something similar to that. Although, I wonder if it would be better for spool-up to just have both turbo's on a crossover so the pressure is divided equally between them from all 6 cylinders? But anyways, for a single turbo setup, either you would have to use a setup similar to the TGP turbo setup with the crossover and all that, or put the turbo at the exit of the rear exhaust manifold.

Shawn

[oil pan 4]

Turbo off one bank. I have herd it brought up many times.
For a factory car to have a turbo only on one bank sounds like a real lame low preformance OEM chop job. A lot of factory turbo cars don't have that much get up on the high end, this one would be real bad.
If your doing it for preformance then useing 1 bank would be a waste of time.
It would be like an under the hood version of the STS turbo. Would it work? yea. Would the new power blow your mind and waste honds all day? No.
A real turbo system on a 3.4L engine easily makes 270hp minimum, out of all the custom turbo jobs I have seen. 270 seams to be the base line.