detroit1994z28

I was thinking either having a 396 stroker with a 15 pounds of boost procharger Or maybee just having a 355 with forged internals with 20 pd of boost procharged. How much horsepower I'm I looking at with the 396 compared to the 355. I want a fast street dependable car.

rskrause

20psi and "dependable" are not really compatible terms. A motor can bel built for that kind of boost, but it will be very expensive. And if the rest of the combo is anywhere near optimzed, it will make huge hp and will need mondo supporting components (fuel system, drivetrain, exhuast system, supension and chassis mods, etc.),

As far as a stroker vs. stock stroke, as long as you are buying a new rotating assy it only makes sense to build a stroker. I am a fan of the 3.75" stroke 383 vs. the 3.875" 396 for reasons to tiresome to go into now.

So, I would advise "none of the above" and suggest you build a 383 and plan to run not more than 12-15psi. It still won't be a cheap or easy project, but it's more realistic than an ultra-high boost motor.

Rich

detroit1994z28

All I want - my goal is to have somewhere around 600 at the wheels but stay dependable also. They have the new cobras running on pump gas and dependable with 650 at the wheels. If I build a 355 with a 15pd boost procharger with all optimal parts do you think thats possible??

blownbird01

in my opinion, there is no such thing as 600rwhp being dependable! With that said you would have no problem building a blown 355 to run in the tens. I have stock heads and intake and I'm almost there with a hot cam and 12#s. Can't get traction and that is causing me to run out of gear because of th350.

n2oblkz

I don't think that you are asking for too much. I am in the process of getting things together to build me a blown 357. I have bare AFR 210 LT4 heads that I am going to have hogged out. I just purchased a Cola Forged 3.50 inch stroke crank. I am going to use Maley H beam 5.7 rods along with JE extreme duty -22CC .030 over blower pistons with Hellfire rings. The motor is going to have studded heads and mains and converted to 4 bolt. I am going to hopefully use and ATI D1 and run 15 pounds of boost. I am probably going a little overboard on the setup, but I only want to do it one time and I want a car that can handle more boost than I am throwing at it. I am rooting for over 600 RWHP and I think that I can meet my goal with the setup. Below is a post that I made of a friends car that was tuned this summer. You can see that it is running 10 pounds of non-intercooled boost and it made 572 RWHP (He does have alky inj). Take the same car with 15 pounds and a good intercooler and I think it would be over 600. His cam is not too radical either, it is extremely streetable and you could drive it anywhere. I don't think your goals are too lofty, just take your time and build the bottom end like a tank and have a good set of heads and you'll reach your goal. Oh, and if your interested, the car listed below is for sale.

TonyJ

I resemble that remark...

TenaciousDB

I would be very skeptical that the new Cobra is "dependable" with bolt-on 650 rwhp. Can you bolt on a ProCharger F-1A system and get that kind of power? Apparently so--but I would be interested to see whether it can hold up to that for very long. I'm also curious as to whether the transmission and rear can handle the power.

A 355 with 15# should be able to give you 600 rwhp, but I agree with rskrause--you're going to need a forged crank and rods to do that anyway, so why not go with the 383. You'll get more out of it. I'd avoid the 396 for various reasons as well.

Dave