Xemeth

Hey, guys. I was just tossing this idea around in my head. How much power can a naturally aspirated 4v make? I know with the 2v you're pretty much maxed out at around 350-370rwhp. And that's with ported heads, big cams, high compression, etc...

But what about a 4v? The 2v's are limited cause they flow like **** (230 cfm on a stage 3 head if you're lucky). I know the 4v's can flow over 300 with good heads, but are they still displacement limited?

I wanted to know cause I'm doing a 4v swap this winter, and wanted to see if I should go with NA cams or blower cams. I figure if I can make 450-500rwhp NA then I can throw a nice shot of nitrous on it to hit 9's. But if that's not really plausible, then I'd go Novi 2000.

Any help is appreciated.

mfj

500 rwhp NA? Not going to happen, bro... Go boost!

Blownsvt

you will be hard pressed to hit 500hp NA. i would be shocked. you are going to need boost. also good luck going 9's with under aroud 750whp in a full weight mustang.

mfj

9's are very realistic number with a 750 rwhp full weight stang... On a good tire that is...

Stone629

You're going to need a lot just to make 400rwhp. I love the idea of being N/A, but you will come out much cheaper with forced induction.

Xemeth

I'm not really too worried about cost. I kinda like the NA with a big nitrous shot. And I'm fully aware how fast 9's are. It won't be full weight, I can tell you that.

I'm just wondering if it's possible to be around 450 or so NA. It's kinda dissapointing if it isn't possible with a 4v, either.

So a 4.6 4v with ported heads (300+cfm flow), really nasty cams (I don't care about streetability), short runner intake, and high compression (13.5:1 or something) with 110 octane race fuel wouldn't be able to make 500rwhp NA?

Mustang3GT07

Just remember most power comes from a tune. So make sure you have a good tuner!

mfj

Well if your talking about doing something completely unstreetable, then yes. 13.5:1 compression means race gas 24/7. Along with some RADICAL cams, and everything else you mentioned. COMPLETELY UNSTREETABLE...

If I built a Stang that was unstreetable, it better have a FUKK LOAD more than 500 rwhp... A really stupid build, IMO, but to each his own.

Xemeth

I'm looking for as much power as I can make NA, and then make up the rest with nitrous.

Streetability isn't a concern. I might drive it 1000 miles a year. Trailer it to the track. That sort of thing.

So in that scenario 500rwhp is possible? Cause with a 2v, Mitch (code3GT, now 1SLO85) make like 360 or something rwhp with 13 or 13.5:1 compression, stage 3 heads and cams, P-51 intake, 283ci motor, and some other stuff.

mfj

Hmmm... Mmmmaybe possible... I haven't seen it done yet though... The Big Dawgs of the modular world use boost.