The 1947 - Present Chevrolet & GMC Truck Message Board Network - View Single Post - 400-450hp 355 on a budget?

Marv D · 12-10-2011, 04:55 PM

I believe guido is speaking normally aspirated, and I'd have to agree, but I should sit on my hands let him clarify that himself.

And I'd agree with it DEFINATELY in referencing the GM production vortec castings. In fact making 400 n/a with a L31 head warmed over.... well,,, Hell even the ZZ4 / Fastburn package with hot cam and everything McClaren could do short of a real port job only made 380ish on a 'REAL' dyno.
The aftermarket offers a vortec style head (such as the Edelbrock E-tec in 170 and 200cc version, as does a lot of others) that is well capable of closer to 500 n/a on a big inch small block.

12-10-2011, 04:55 PM	#35
Marv D Registered Truck Offender Join Date: May 2008 Location: hells training ground (aka Ariz) Posts: 3,118	Re: 400-450hp 355 on a budget? I believe guido is speaking normally aspirated, and I'd have to agree, but I should sit on my hands let him clarify that himself. And I'd agree with it DEFINATELY in referencing the GM production vortec castings. In fact making 400 n/a with a L31 head warmed over.... well,,, Hell even the ZZ4 / Fastburn package with hot cam and everything McClaren could do short of a real port job only made 380ish on a 'REAL' dyno. The aftermarket offers a vortec style head (such as the Edelbrock E-tec in 170 and 200cc version, as does a lot of others) that is well capable of closer to 500 n/a on a big inch small block. __________________ Still playin with trucks, even at my age! When you're dead, it's only a problem for the people around you, because you don't know you're dead. .....It's kinda the same when your STUPID. I just did my taxes and reviewed my SS statement. Thanks to the current administration it looks like I will only have to work till noon on the day of my funeral.