Increase Redline

[Craney]

Got a 34 gt-t with about 90,000 kms. Got a microtech in and with the way it's tuned at the moment i'm getting good power from when the turbo spools up (4000rpm) to redline (7000rpm). However the gain in power between 6000 and 7000 is unreal. A friend (300zx owner) tells me it is common to increase the factory redline and after reading a couple of threads it appears this is the case. Which interests me as i'd like to extend this power range.

So basically I'm asking if i can increase the redline, and if so, what's a safe limit.

R34 gt-t

Stock rb25det neo

650cc injectors

600hp garret turbo

hybrid intercooler

bosch fuel pump

splitfire coils

greddy intake manifold

3 inch dump with 3.5 inch rest of exhaust

Basically everything without touching the internals. Currently running 308 rwkw on 18 psi boost. If you need more info let me know.

Any opinions are welcome.

Cheers

[R31Nismoid]

I wouldnt go any higher on a stock bottom end personally.

Not with 18psi/300rwkw.

Would be ok i guess for 7500, for a *brief* squirt. Extended RPM though forget it.

[T04GTR]

yeah. unless you have rods and pistons. and a full engine balance use the factory red paint.

[fEkuaR]

You are really leaning on that stock bottom end as it is. I definately wouldn't move the limiter from where it is.

[NYTSKY]

After my car was tuned i noticed my rev limit was set to 7500rpm.

I dont hit the limiter often,it might happen when boost comes on in first and my foot is on the floor but i normally change before then anyway.

But to be on the safe side i might lower it to 7200rpm.

[Bass Junky]

I rev mine to 7800 rpm, it starts to run out of puff by then anyway. I do however run a set of cams. Standard bottom end.

Maybe with that turbo you might try dropping in a set of sticks, make the power a bit earlier and not have to rev so hard.

308 rwkw might be leaning on the bottom end a bit, but R34s do run GTR rods, so maybe not as much as we think.