geez, I know it has been brought up somewhere but I cant find the thread. SDPC claims 360 HP w/ their Vortec base, heads and hotcam...STOCK computer, chip, MAF, etc

I call B.S.....what do you all think. If its good for 350 HP I will order it all RIGHT NOW!

 

well, remember that these kinda tests can be quite "shady"... I mean, look at those charts which muffler manufacturers make up to show the comparison between their brand and the "leading competitors". 360hp is attainable, but under what circumstances? Their test engine could've had the base port/polished, same with the heads, etc.. etc..

But on the other hand, they also have to be careful as to how they advertise their claims because of potential lawsuits.. so they might actually be truthful.

 

There's a good article in the latest GMHTP on a TPI Vortec build up. Brian Gruben, an employee of SDPC, built a Vortec headed 350 in his 1989 'Bird.

SDPC Vortec TPI Base Manifold
Edelbrock High Flow runners
Vortec Heads
LT4 Hot Cam & 1.5 Roller Rockers
1 7/8 inch Dyno headers
52mm TB
15* Base timingon 92 octane

Dynoed out at 356.7 hp. That's pretty impressive. Throw a SuperRam on it and see what happens.

EDIT: "With a conservative 20 percent driveline loss, that would come out to around 285.3 rearwheel horsepower."

285hp at the rear wheels isn't bad. Didin't ZBRA have a SuperRam/Edelbrock manifold set up that dynoed in at 330rwhp?

Does anyone remember? I just remember wanting to make sweet love to that car.

 

That might be attainable since they're talking crank HP.

360 @ crank = 288 RWHP

I'm at 271 RWHP with a stock intake, so you can draw your own conclusion from there.....

 

Geez, I'm pulling 287hp at the rear wheels with TPI, ported stock runners, nasty aluminum Vette heads, and the same cam as their test used.

I was kinda hoping they'd get more out of the Vortec heads, with all that extra flow and better combustion chambers.

 

Yeah, i'd say 360 hp would seem like a conservative goal for that set-up.