Nightkat

I have finally come to my finances and have decided to boost. I have done numerous searches and have done a lot of research here on the forum. The only thing that keeps me from wanting to go with the Greddy is the fact that it becomes inefficient at 7k.....One of the reasons I bought the 8 was for the high rev. capacity.

The question I have is are there any hybrids out there in which there are turbo's that will stay fairly consistent with RPM's above the 7K benchmark. I believe that going with a bigger turbo it would be able to handle the capacity but have boost lag in the lower RPM's. Is there anybody in here that has overcome the problem and what kind of setup/problems are you having? I would probably stay with a Greddy E.M. or Interceptor X.

ricky356

dude you havent done that much searching on one of the threads surounding this one mysql1o1 talks about the greddy going to 9krpm if its at 6psi "what the kit is made to do" throw on a larger turbo with a faster spool up "gt287" and ye shall excede 7krpm at hi-ir psi. that turbo is made for small displacment engines.

good luck

R.

rotorocks

Ya ain't making power unless ya pushing 12psi

Just kidding.

xenon

Yep, just get the greddy kit and have fun with it as-is out of the box. Then when you need more power, swap in the GT2871R turbo and you will have a whole new beast again.

Fun times!

SlideWayz

For it's displacement, a rotary engine can spool a bigger turbo than you'd think because the exhaust gas is so hot (more kinetic energy per unit mass = more energetic molecules hitting the turbine blades thus faster spool).

It is a bit of consolation for the inefficiency of the rotary: the chemical energy of the gasoline isn't converted to mechanical energy as much as in a piston engine; instead too much of it is converted to thermal energy.

mysql101

yeah, if you stick to the stock boost of 6 psi with the greddy, it'll maintain 6 psi to redline. Most of us turn up the boost to 8-9 psi though, cause you can get another 40 whp out of it. At the higher psi, at 7k rpm the boost will drop and it'll end up at 6 psi again.

you can swap out the turbo if this is an issue.

chetrickerman

i happen to think that the rotary is more efficient than a piston engine. The crank shaft has to turn all this stuff like cam shafts and other things, when the rotary engine only has to turn two things, the rotor and the eccentric shaft.

Brettus

iTrader: (2)

just looking at it simply you would think that - unfortunately the reverse is true ..

chetrickerman

damn it, oh well, there is always wishful thinking, and FI does make an engine more efficient