new setup. power guesses

[66StangGuy]

any idea what kind of power i should find from this setup

holley 600cfm vac sec.
performer intake
world casting windsor sr. 200cc intake runners and 2.02 intake 1.60 exhaust valves. huge exhaust ports 64 cc chambers.

flat top pistons with valve reliefs
stock bottom end
hooker super comp headers. 2 chamber flows.

also what timing should i set these heads at. i used to have 68 cc heads and ran 12*. with more compression because of the smaller chambers should i run less timing say about 10 or whats the best place to start so i can try different ones.

[Dark Knight]

with a 64cc chamber and flat top pistons.. you can run MORE timing.. you probably only have about 9.25-1 compression..

you've kind of got a mismatch of parts there.. the heads are a little to big for a mild 289.. the performer will help some, but it's going to be kind of flat on the bottom end..

also, what cam?

[rbohm]

with a stock cam you should hit the factory 4bbl engine rating of 225 hp. with more cam that could run over 300hp.

[66StangGuy]

i think you guys are a little underestimating my setup.
i agree with the mismatch but only bought the heads because of the deal. the intake and cam is next on the list after i jet the carb.

i would guess my power to be at least in the 300's now. iv ben in a k code mustang and it was not all that fast. in my car now i have a new problem....traction.. with my roller rockers and all i put my specs into desktop dyno 2000 and it says 4oohp flywheel at 5500rpm.

[rbohm]

ok, stock the 4bbl challenger V8(the a code engine) was an overrated 225 hp. it netted more like 180-190hp. the heads are worth about 50hp on a stock motor which means that at best you are getting 230hp net which is around that of a 87 mustang gt 5.0. with the right cam, you can be seeing arounf 350hp as the heads and cam working together can really wake an engine up. i have been doing this for a long time, including building race engines, and i have built engines on desktop dyno, and matched them to real world settups, and i can tell you that likely you used the wrong head parameters. and that will give you erronious hp and torque readings. i made that mistake myself at first.

[Dark Knight]

well. I'd say either hit the dyno.. or run it in the 1/4.. you might be pushing 250 at the wheels..

K-code mustangs only run low 15's- high 14's...

here's a road test from 65.. hipo went 15.9 in the 1/4... 85 MPH

http://www.hipomustang.com/remotes/

[66StangGuy]

ok with that given what is your guess on the 1\4 mile run?

[Dark Knight]

mid to high 14's... depending on altitude, tires and what all is done to the tranny...if it's the stock converter... it's going to hurt alot..

go race.. it's a blast!

[Rev]

I'd say 200 RWHP or there abouts. That may be 250 SAE net at the flywheel. That should put you mid or low 14's at the track with decent traction and driving.

When comparing HP, one has to be careful to designate gross (pre 1972 factory numbers), net (post 1972 factory numbers), standard dyno (conditions used in most magazine tests), and then the RWHP or FWHP numbers, usually also SAE from the chassis dynos. There's huge differences in those various measuring systems.

Rev

[66StangGuy]

i dont have the stock converter. its a 1500 stall but i dont know the brand. its about 2 years old. the tranny is a rebuilt c4 with a b&m stage 2 shift kit. it almost chirps the tires when i shift normally. i have 265 60 15 tires. they are crap tires but are really wide. assuming traction is good and trans is good. what do you think i could get in the quarter. also with my setup. what should i do next to help everything work together. bigger intake? performer rpm or something else.

[Dark_5.0]

Those heads eem pretty big for your set-up. I think you are low 14 second capable. With a descent 60ft.

[Rev]

1500 is about stock for the C-4 torque convertor.

Rev