How much NOS would VR6 Take

I know there are lots of arguements etc etc but if i gave you a stock 2.9 VR6 a NOS kit and 1000 how much power do think you could extract. The engine would have to survivie repeated shots.

We are ignoring the drive train for this topic...

please elaborate on your choise...

Tim

 

Standard bottom ends have been proven to take 500BHP in the states.

Remember, it's not the nitrous that will blow it up, it'll be the lack of fuel or you firing it too early and bending the conrods with the ridiculous torque.

I'm putting forged pistons in mine and I'm going for a 200BHP direct port setup with it's own seperate fuelling system. Balls to turbos.

 

Yeah and you still get the advantage of having a High compression engine for normal use.

 

i'd get about 190bhp and a good afternoon in the bookies

 

paul are you going to raise your CR?

 

Yes. and fit 288 cams.

My gearing won't suit a turbo, I want a nice torque but revvy NA motor.

 

288s will be a bit wild if your after torque surely?

good stuffhereabout dynamic compression ratio Paul, makes a lot of sense.

Also don't you have to be carefull on compression when using NOS? you got forged pistons?
Edited by: prof

 

I will be getting forged pistons. but I'm not sure whether or not to take it out to 3.0 or 3.1 yet. that should take care of any torque isues

 

should definitely help, but will place even more demands on the head flow, you attacking that with a dremel too?

 

Dremel? no I've got a 22,000rpm die grinder and a 3HP compresser for that job

 

nice, although this is a k- series, dave here gives some good general advice porting stuff wonder what heads are similar to the vr one, vertical valves innit?

 

yep, totally vertical.

cheers for the links.

 

pinto or crossflow maybe? Vizard wrote loads about porting them,

 

a quote form Bill Blydenstein

"most of the gains from head work can be found within 1" of the valve seat"

or something like that.

 

yep I was looking at a 16v bmw head the other day and was amazed at the sharp edges just inside the throat, however on modern engines they might be there for extra turbulence on something

 

more nitro /cam info

 

What make of piston??

How much are you thinking to pay for them??

 

Excellant. So my 75Bhp NOS hit I have will be pretty much fine then?


Hmmm, maybe I should go for some more!?!

 

Probably JE pistons. haven't priced them up yet. but they'l be coming from the states.

 

Thats what I did you should be looking at 100 a piston... for JE's