Are you sure it only raises the compression to 11.2? I thought someone calculated it would raise it to 12.

 

you basically need racing gas or a lot of timing retarding to run 12 or higher compression right?

 

You should need race gas because I don't think you can retard the timing enough. I have have always heard that 11.5 to 1 is the limit on pump gas.

 

comp cams came out with a 14:1 head manifold and cam setup for pump gas 350 SB's that combo was runable because of the overlap /duration of the cam used.

 

NISMO says 12:1 with those heads....

Is there a dyno or ??? that shows VQ35 valves float past 7300rpm on STOCK cams?

 

VQ30/VQ35 hybrids are running 11.5:1 on 93-octane, however they don't have the stock ECU advance VQ35s do but the VQ35s have much better head cooling.

 

our race team is working on something with the NISMO 12:1 heads currently... I called them to confirm everything I would need and turned out they were building pretty much the same motor using the MOTEC Engine Mangement...

They are aiming for over or around 400RWHP NA...

I hope to get 350 out of it with the stock ECU...

There is a BIG problem with the 12:1 heads which they are trying to work out for nissan... If they do they will be either changing all the heads or figuring something else out...

 

i mean stock rods & pistons... just the connecting rod bolts need to be stronger...

 

thats what we thought.. turns out its 12:1...




by the way... my Crawford Plenum will be here next week... i will then install / dyno the same...

my car has opened up alot since i did the dyno the same day i installed the mid-plenum... pulls much harder now...

 

So at 12:1 would you have to use race gas all the time?

 

Jason,

Can you describe the mid-plenum effect on low torque

 

nope just the fact that a friend missed a shift from 5 to 6th and instead hit 4th at the stock redline this pushed his rpms to editwe think based on the 1000rpm difference and how long he said it took to shift) 7300-7400 rpm and there was piston to valve smackage. (chunks taken out of piston and bent valves.

 

because everybody shifts gears at 8000 rpm.

Nothing wrong with stroker and except maybe sleeves causing higher water temps.

 

Depends on cams and other things. If you can get a cam that will get all the exhuast gas out before the next xyxle you dont have to worry about higher octane gas.

 

Theres no way your going to get 350 without ECU or tuning. I dont care how big a cam you use. If your not revving over 6700 rpm your not going to make 350 hp. You need an ecu to raise the limiter right?

 

Your going to need a bigger oil pump for that mister. And one mis shift at 8000 rpm is going to **** your block.

 

That's what I thought....

VQ35s will rev to 7500rpm with STOCK cams and withOUT valve float as long as you have connecting rod bolts.

 

What do you think the 300hp engine will rev up to?

 

hey ice guy the piston hit the valve due to float and this was on stock cams.

its not the cams that cause float man it the springs

edit: I said nothing about broken con rod bolts and nothing about an oil pump just that the piston smaked the valve at high RPM in no doubt caused by the "softness" of the stock spring aka its ability to return the valve to a closed pos by the time the piston gets to TDC.

edit #2 : Ice can you show me anyone that has taken the stock springs and cams to 7400 that has not had valves hit the piston since you are so quick to doubt me and my first hand experience.

 

I never said no tuning...

Tuning the stock ECU is still using the stock ECU...