pimpin4profits

I know thatin supras it is faster to put a single tubo in place of thetwn turbo, but is this also true for RX-7s? I know its hard to compare a v6 with a twin turbo but I would like to know for a friend of mine who is in the market for an rx-7. peace

__________________
Tranforming from family sedan.....to WRX slayer!!!

"Hey Riceboy, dont be mad at me because your car puts out more decibals then it does horsepower."-Me(I think)



"Don't like what I say, Well youre a hypocrit, Cause now youre givin me shit, for givin you shit."-Brad Holmes

Mike.Com

Yes, most people that have FD's with the stock twins ditch them for high hp appplications.

__________________
-Mike C.
1995 Infiniti G20t
http://community.webshots.com/user/mike13bt

NB8CT

They are faster, sometimes, most big hp Japanese tuners use big twins to make over 1000hp out of skyline.
The RX-7 does like a big single, it helps with engine life too, the dual setup has a lot of room for error and the single helps that.
And none of the cars we are talking about here have a V6

R1-rider

http://www.rx-7tt.freeservers.com/rx7stuff.htm
Has alot of information about the twin turbo setup for the rx-7.

I would go with a good single turbo, probably a T series turbonetics.

Like NB8CT said, the twin turbo setup has alot of problems and malfunctions more often then a single turbo.

mauimoon

Single turbos are fine for > 600 hp applications but all the power comes above 6000 rpm. Twin turbos can not only be powerful they make the rotary engine really shine. The trick is the right computer (APEXi Power FC or Haltech), improved fuel delivery (pump, filter, injectors), and the exhaust, intake and cooling mods to match. You end up with 500+ hp and a very street drivable machine where all 500hp shows up around 4000rpm and stays pretty much all the way to redline (12000 rpm in a balanced engine).

Mid_KnightFD

Yeah, single is better and makes more HP, but what you said makes no sense. Let me correct you. First off, the supra is not a V6, its an inline 6,
and what do you mean when you say its hard to compare a v6(inline 6) with a twin turbo? I think you mean rotory because both the supra and rx7 are twin turbo from the factory, just to let you know.

I hope you're talking about aftermarket twins because the most HP I have ever heard of from the stock twins is 350, and I think if you went to the rx7forum and asked any of them, they would agree.

__________________
93 rx7 black
t-78 single turbo
3mm seals, haltech, streetport
17" bronze volk te-37
re amemiya sleek headlight kit
and alot of other good stuff

Cbass

He was mentioning the V6 as to the question of twin charging. The V6 would require 2 turbos for efficiency, as it has two engine banks, so a single turbo would require combining the headers, or running unequal backpressure.

It's all depentant on your goals. A TT setup that supports 400hp will be more streetable than a single turbo doing the same job. A single big turbo is more efficient, and the clear choice for a drag/race car, where the RPMs will allow constant boost.

A street car will see a lot of off boost duty, often with rpms of 2000 or even less. You have to worry about stop lights, gearing down... the list goes on. If you have a good single setup, with a good stand alone engine management, you can almost eliminate lag.

The sad fact is, single turbos lag. They lag really badly if you want big power. I have seen 4 cylinder turbo cars, 400hp with a pair of little K24 turbos, with no lag. The header collecters went right into the turbos, and they then merged into a single pipe. Crazy...

__________________


Connor - Porsche Nazi since 2001, VW defiler since 2004
This here's a Fabrication forum!
My lugnut requires more torque than your LS1 makes.

Pennzoil GT-R

i always thought twin turbos had longer lag times unless there was one low pressure for low revs and one high pressure for higher revs. dont twin turbos take more power to get them to spool?

__________________