I have a question about the effect of increased back pressure on only one of the banks of an engine. Attached is a crude picture of how I think a turbo system works, and I dont have any CAD available to me know, so don't laugh lol.

There seems to be a fundemental flaw with the placement of a turbo on only a single manifold. Won't the backpressure on the bank that you place the turbo be greater than the other bank, and will this cause undo wear on the engine internals? Since I have an 02, how does everyone think of this idea for a stealthier, somewhat easier (I use that term loosely) way to make a turbo manifold, while keeping the back pressure equal on both of the banks.

Think of my engine bay with no battery and and air intake just yet. There is a decent amount of space to work with, no? You cut out the pre-cats with a torch, (or you cut a piece out of the very first available 2.5in pipe after the manifold) you weld a "Y" divider on both manifolds. You weld various tubing angles and whatnot until you come around to the side of the engine, right above the tranny. Then, you join the two sides of the tube by an angle weld, and mount the turbo inlet right on top of it.

Do you think that would be a better way to go? Or should I not worry about it and only use one manifold to spool the turbine?

 

I'm confused... who uses only one bank to spool their turbo?

Your thinking is correct that it would cause a bunch of weirdness and is not a good thing, but that's why no one does that (at least no maxima setup that I've ever heard of, and not any one worth a damn anyways).

I addition to the problems with increased backpressure causing different power production and different amounts of reversion between the banks, etc, you'd only have 1.5L spooling your turbo, so whatever turbo you chose, it would spool just like if it were on a 1.5L civic engine... i.e. like crap (or, if you sized it properly for the 1.5L of exhaust you'd be seeing, it'd probably not be a good fit for your setup as far as compressor flow.)

 

Maybe I missed something when I was looking at other people's setups. I was just making sure, I don't want to go into this half-assed.

How well will the exhaust flow up to the turbo if I have a "Y" connector off of the manifold if the exhaust has to go "up and around" the engine compartment to the turbo instead of just a straight-through design of the stock exhaust?

Usually, gasses and electricity take the "path of least resistance", will this be the same with the setup I am thinking of? I realize that some exhaust will get to the turbo, but will it be enough to spool it properly or do I have to think of a different solution? The more that I think about it, it seems like even though the exhaust will flow through the "Y" up to the turbo, it seems as though most of the useable pressure will escape through the normal route of the exhaust, make sense?

 

you're not understanding how the exhaust system of a turbo car works. ALL of the exhaust goes through the turbo, there is no alternate path for the exhaust to take (until the wastegate opens, but that is more complication than this discussion needs).

 

fixed but with no wastegate....

 

ahahaha rad muffler

DF

 

Ahhhhhhhhhhhhhh, OK. See, by looking at other people's setups, and looking online, it seems like most of the people doing turbo setups are 4-bangers. It's hard to find a v6, and even when you can find one, I couldn't find just an exhaust diagram for a turbo setup; so that's why I was way off when i was thinking of how to to this.

I Think that by having all of the exhaust go to the turbo will be easier that trying to do what I was thinking of. Thanks JeEvE for fixing the diagram, and nealoc for talking some sense into me.

Does anyone with a low-pressure turbo setup (or high pressure for that matter) completly trust internal wastegates? I think it'll work, but I don't want to be driving then all of a sudden have a spike to 15psi because the wastegate decided to crap out on me. Would you recommend having an external for insurance?

 

Anyone? does anyone completly trust internal wastegates or should I have a back-up?

 

tons of cars use internal wastegates without issues. all factory turbo cars have internal wastegates. personally i wouldn't use one though if i were building a turbo setup for a car that didn't come factory turbocharged.