Still Can't Make 9 Seconds

OK guys. I have taken my 514 crate and replaced the cam with a Comp Cam 9-703-34. I also when from a .040 to a .038 head gasket. I'm running AR-3339 plugs, and the pickup still won't do 9 seconds. With the stock crate 514 it did 10:50 in the 1/4 @ 126 MPH. Now it goes 10:35 @ 130 MPH. I know the torque is higher cause after the mods I had to readjust my 4-link to get it to launch straight. I put it on a dyno and adjusted the timing and carb, but still no 9 seconds.

Do I have to pull the pistons and increase the compression ratio. Is that my only option? More specs below

Carb 1050 Doninator 96 squared
Powerglide trans 1.76
4:56 rear gears
3000 lb pickup weight
shift point 6500 RPM
launch RPM 5000
Timing 38 degrees

60' seems slow, what converter? I know at our track our c4 stuff will out 60 a pg anyday given the same power and weight. We fought 60' issues for years and finally got it to come around....was all in the converter.

My converter stalls at 5100 RPMs, and my 60 foot times are slow (1.51). I'm also running an 7AL-3 ignition, and I've match ported the SCJ heads. OF course it's got the Victor manifold. I'm running a vacuum pump also.

What I don't understand is the dyno says I'm only running about 465 HP@ 6300 RPM, but the stock crate claims 600 HP at the same RPM. Now remember the dyno I used is at the rear wheels so I can add 25 to 30 percent on to the 465, but still after changing the cam I figured I'd get more HP out of it. I don't have the torque figures with my at work, but they did increase, but not significantly...

Guys I'm on the way home from work, so I'll be off line all weekend. I will bring in specific specs for my pickup on Monday so I can answer all the quesions. Have a nice weekend

60' is slow, there is more to the converter deal than stall speed. I would venture a guess this is why the cam swap made no real diff. Our 306" fox mustang runs high 10.60's at 125, bout a 1.47 60', typical 3000' d/a, 2900#s Every time we send the converter back we seem to find just a little bit more.

If you running the scj heads i would recomend 29-31 degree total timing.
38 sounds way to mutch on the scj head.

Try jetting it down a couple sizes and see where it goes if it picks up keep reducing the jet sizeuntil it slows down, this is the least expensive way to find power. Gregg

Bill......When you went to the chassis dyno, was the car on slicks?

I agree on the 29-31 degrees total timing with the Kaase SCJ heads. In fact I read somewhere here that they like 28 degrees best.

Seems you are missing a bit of power somewhere. My combo is basically a 0.030" over crate motor, but with 10.7 comp and a cam similar to the Comp XR292R. In a 3500lb car it's pulling a traction limited 10.28 @ 131.8mph. I'm running a 4000rpm stall convertor C4 and 3.9 diff gears. From memory, my 1050 is jetted 84/94, so maybe a bit of tuning with the carb and timing might find you some missing hp.

Gentlemen: I need to respond to your questions.

1. Kjebba and Todd521: Ford recommends 34 degrees of time for this motor. That was their recommendation when I purchased the crate motor. I tried 34, 36 and 38 degrees on the dyno and it liked 38 the best. But I will leave the issue of timing open for further discussion.

2. Kjebba and Todd521: Yes the car had it's slicks on when I dynoed it.

3. Zephyrracer: When I went into the dyno, I had 91 squared, I changed to 94 and finally 96s. It liked the 96s best.

Guys I've brought all the specs for my car to work today. Ford says they dynoed the motor at 600HP @ 6000RPM.

Any help you can give would be greatly appreaciated.

Convertor may be to loose? To much gear? Over reving? Your mph is way low to make a 9 second pass.

Dynos are only good for tuning, Don't let the Dyno number go to your head. Alot of the readings are dependent on operator input and they can sometimes be a little off.

How Tall are your slicks? What Elevation are you at?

Bill take it back to the track and make a pass with the 96 jets then make your next pass with the 88 jets the 1050 came with and see how the car responds Dyno is good for tuning but can be different in the real world. then try the timing. Keep us posted good luck. Gregg

Bill.........Was the car on slicks when it went to the dyno?????????????

Be sure car is hooking , {no more than one rev.} and stays hooked . a big block starts to unload when it comes down and i never notice it ,but camera did :lol:

Is that 600 hp at the flywheel ??

we started with a 514 crate with 2" hooker headers and 1050 out of the box through a c4 and made 490 on the chassis dyno at a ffw event. That mph is low for a 9 sec slip. Our best et with that motor was 10.26 @131

I also been told ford dynos a motor. They tweak on one and build the rest the same way. I also remember when we got our motor the heads were clean had not been run. Have been told they have a machine to run the motor in for 20 minutes to break them in and thats it. Don't know whether theres any truth to that but thats what I've been told.

my cousin has this same motor (heads) he ran 28 degress of timing and he picked up 5 mph 10.60@130