This is in my 91 firebird. I have a 355 small block 10.5:1 compression ratio, 4 bolt main w/ forged Weisco (sp) flat top pistons, stage II connecting rods, ground stock crankshaft for the shortblock. I have Dart Iron Eagle Platnium 215cc/64cc cylinder heads. Clevite 246/246 @ .050, .531/.531 INT/EXT solid lifter camshaft with the Scorpion 1.6 roller rockers. Lift numbers are with the 1.6 RR's, performer RPM intake manifold and a freshly rebuilt Holley 650 DP. Exhaust consist of Hooker Super Comp 1-3/4" long tube headers and a custom 3" y-pipe to a custom 4" exhaust over the axle w/ a dynomax bullet muffler. All backed by a T-56 Transmission to 3.73 Richmond gears and a Zexel posi unit. Could somebody give me an educated guess on how this car will do HP/TQ wise, or quarter mile wise roughly? The only suspension mods I have are UMI SFC's and Lakewood lower control arms, poly torque arm bushing and drag radials. What do you think it will put out HP / Trq wise, quarter mile?

 

38 views and no replies?

 

At first I was going to be flippant, but then I thought you might be new, but with 160+ post you should know that a simple search probably would have gotten you 38 answers.

 

Thanks for your reply. I was actually just looking for different opinions / critique my combo.

 

I would say your lookin at 400-450HP. The 650 may be a little small for the combo,but track testing will figure that out.

Depending on traction and driving skill,your lookin at mid - low 12's if the car is full weight.

Sounds like a good combo to me,pretty stout and you can always tell your friends that the steel heads are stock! I would anyway.

 

That looks pretty good other than the carb maybe being a bit small.

What does the car weigh, and what clutch are you using?

That should be an easy 11 second ride trapping in the high teens if you can drive it.

 

Low 12's at 114 MPH, if you are using 26" tall drag radials and can stick the launch.

 

Damn.. I saw zach and was gonna comment.. but ****.. the whole third gen crew is in here! Good to see ya guys again!
Zach.. I think you've got a pretty fly car there. Can't tell ya how fast or how many hp, but I'll tell ya it sure sounds exotic.

 

With your combo the only thing I see killing you is that carb. Your heads will never breath like they should with a 650. With a 750 carb you should be in the low 12's. With slicks, the right gearing and suspension tuning high 11,s. Good luck.