Little on the theoretical side and I also have no idea what I'm talking about... but would it be at all possible to have a smaller primary turbo to handle the lowend rpm's and the larger twin turbos for the higher end, each dealing with 2 cylinders? Supposing I have any idea what I'm talking about and there's enough space to fit them.

I don't know, it's off topic a bit and probably makes about as much sence as me asking if write TURBO GAS on a can of Coke and pour it in my tank will it make be go faster.

 

I'm talking about a PARALLEL twin turbo setup, what you are talking about is a SEQUENTIAL twin turbo setup, there are 2 kinds of twin setups. If you have one turbo being run by 2 cylinders and another turbo being run by the other 2 cylinders, than that is a PARALLEL turbo setup. Because the 2 turbos would be working at almost the same time (parallel to one another).

Quote:

That's all there is to twin turbo cars, look at factory specs on 300zx's,RX-7's and Supra's.They all have small primary turbos and large secondary turbos.I hope this clarifies any confusion.

I know that those cars come with stock SEQUENTIAL turbos, but it is not uncommon for owners of those cars to switch the turbos to PARALLEL operation. Parallel operation is when both turbos spool at the same time, instead of the smaller one at low RPMs and the larger one at high RPMs.


If you were to want to TT a 4 cylinder a sequential would be a poor choice. I think that only NA cars that have a lot of exhaust flow and a lot of room in the engine bay would benifit from a sequential setup. For example the S2000, if there was enough room in the engine bay the car would handle a sequential setup pretty well, since it flows the same amount of air as an FD with no turbos (no boost). However sequential turbo setups are more complex than parallels, which is a one of the reasons that most MKIV and FD guys go parallel.

EDIT: also, FYI the 300ZX TT has a stock PARALLEL system....it IS NOT a sequential system.

 

I know in his 2001 Civic COUPE he had a Single Turbo on an h22.

I'm pretty sure he has the same setup in his hatch. But yeah, i'll have to see

 

Twin turbo's on a 4 cylinder is pointless, its mostly for show (Hey look at this!!) purposes.

 

oh my bad.. sorry i was thinking of another car.. correction.. papdakis doesn't have a TT setup... really sorry! but they exist.... unsure of the benefit.. most guys who want to modify their TTs end up upgrading to just a single turbo....

 

the benifits of a TT setup is that they have really fast spool-up but are more complex than a single setup.

 

TT on a 4 cyl could never be as good as a single setup, EXCEPT in a boxer engine. for the same reason that a TT parallel setup was good in the 300zx. there were two banks of cylinders in the V6 so by using a small turbo on each side, they reduced the amount of piping, and thus reduced lag. it is inevitable that people will be twin turboing their WRXs in the near future, because one of the flaws in its design is that there is only one turbo, and furthermore, its placement is nearer one bank of cylinders than the other.

 

Apexi's drag Integra had a twin turbo setup on it.

 

SOmeone plaese close this thread. It's driving me crazy:jerkit:

 

Porsche twin turbos are also parallel, on their flat sixs... at least, I'm pretty sure they are.