Help me achieve 300RWHP

[OrLackThereof]

Running 18 to 20 degrees of timing on PUMP GAS with aluminum heads is rubbish. You're gonna need to run either some 100 or 110 octane race fuel to run that much base advance, unless your engine's compression is....nonexistent. 16 degrees is a good number as long as you dont ping. Ive got Edelbrock alum. heads, and on 93 octane if I run 15 or 16 degrees, I start to ping. And my compression ratio is only somewhere between 9.0 and 9.5:1...probably like 9.4.

You CAN bump the fuel pressure at the AFPR....it's the easiest way to do it. The problem with that is, it bumps fuel pressure ALL THE TIME. Not just in the rpm range you need it...which is why getting a custom chip is FAR better. He's probably saying adding more fuel would make it worse, because you're in a good range in the high rpm zone, which is what you're shooting for in a dyno. So by bumping the pressure to compensate for a low rpm lean condition, you're going to richen the mixture in all the other ranges, and possibly loose peak horsepower.

42 psi sounds about right for your car....that's what I'm running right now even. I tried 45 and it ran rich. 40, and it ran lean...42 was the best compromise I could find. I'm not running a custom chip either.

As far as your 300 hp goal...what everyone else said will definitely help. Also, how's your clutch? A slipping clutch will make you lose some power real bad. I mention this because I'm running an automatic trans ( yes, ENTIRELY different), but Im only expecting to put down 270-280 rwhp right now...but thats because my transmission is slipping BADLY. The motor should be capable of a LOT more.... So that's just something to consider as well.

 

[kevsstang]

I have a King Cobra clutch that is working fine it only has about 4000 miles on it and only 10 1/4 passes. I always run either Sunoco 93 or 94. It doesn't ping at all. So i guess i will leave the timing where it is. I don't want a custom chip yet as i plan on supercharging it within a year.

 

[OrLackThereof]

Yeah man, just go with the cheap mods then as everyone else said, and see what you cant leach out of it! Lemme ask you this man...that 100 mph pass, was that with the same setup that you dynoed with?

If so, you may have just given me new hope. I'm trapping at high 103's right now.. Car show in August is bringing a mobile dyno.......hmmmmm...........

 

[kevsstang]

Yup same setup. Many people have stated that with traction it should be 13's or 12's. I believe 13's definitely the 12's that would be awesome. Looking back on the 100mph pass and others I launched at around 1500 then hammered the gas. I should have feathered it more and i think i could have been in the 13's.

 

[OrLackThereof]

100 mph is enough to get you into 13's. Although it's quite unlikely on street tires. What's your 60'? I'm running a best of a 13.7 at 103.8 mph....but the pass right before that one, I did 14.1 at 101 mph... (Adjusted shift points and removed dirty air filter to get the extra mph) These are all with crappy 60's of 2.1 or 2.2. With a solid 1.8 or so, you could probably get there...

And yes, 1500 is far too hard of a launch. You need to keep it lower and get her off the line with the most umph you can without spinning, THEN really romp on it and keep her revved out nicely. I dont know how your car's powerband is is, but with mine...I cut crap trap speeds if I get afraid and shift at 5500 or lower. That 13.7 pass, I kept the motor totally revved out...shifted at maybe 6200 rpms into 2nd, and 6000 rpms to third, and crossed the traps at 6500 (the high rpms are due to transmission slippage).....but keeping it revved out that high boosted my trap speed SUBSTANTIALLY.

 

[kevsstang]

On that run it was 2.2. Torque peakes out at 4000. Horse power peaks out I think around 5200 - 5500. I can feel the power come in around 2500 and it pulls strong to 6000. I think i was shifting around 5500 each gear. I was running cars down on the top end. I would just spin coming off the line and they were hooking up. The track i go to is having a test and tune next sat and i am trying to get DR for next week. I am trying to see if a 255/50/16 with 16 by 7 pony wheel will fit with the quad shocks before i buy them. I don;t have 2 15inch wheels for the 235/60/15 which i know will fit.

 

[OrLackThereof]

Yeah, you're cutting about the same 60's as me. I dunno, I just have this sneaking suspicion that somewhere along the line, you're getting shortchanged a mph or so in the traps. You've got basically what I have, or BETTER than what I have...the only part you're losing out on is the GT40 heads. But yet, youre only trapping at 100 mph. It just doesnt add up to me... Might wanna adjusting your shift points a tad, putting them a little higher and see what happens. It's always worth a shot, especially if you see your trap jump from 100 to 101 or something like that. That always feels good!

 

[kevsstang]

I am not power shifting but am speeding shifting if that makes sense. I let off the gas for a split second or so and then shift. My best Mph that day was on a 14.90 run it was 100.51, so yeah hittin 101 would feel good as would a 13. It was my first time at the strip so alot of factors could have caused slower times. It was fun and i can't wait to get back.

 

[mat50ho]

Have the fuel pressure and the timeing adjusted is not a dyno tune.
When they make a custom chip on the dyno. They can change the timeing cure and fine tune the fuel pressure to the optimal a/f ratio. This will increase hp, driveability and gas milage.


Superchips and others do tunes based on your mods over the phone. If you don't have anyone in the area. Its not the best way to go about it, but its better than nothing. It is very important that if you have a chip made for the car someone with lots of experiance does it other wise its not worth the money.

 

[Ranchero5.0]

Little misinformation above.

Adjusting the fuel pressure is only really effective at wide open throttle, the puter leans it out through the o2's at lower throttle settings. Also stop wasting money on expensive gas if you don't need to. Try running the low grade 87 in with 14 degrees of base timing. Too much base timing leads to too much total timing and that kills power, detonation isn't the only reason not to run too much. With a lopo combo you benefit with a rapid flame front and quick build of pressure in the combustion chamber. High octane gas slows the burn and reduces the peak pressure level. Oddly enough, car's that run 92 octane have more trouble going through emmisions that 87 octane running stangs because all the slow burning fuel isn't getting burnt at idle.

Jamie

 

[kevsstang]

I don't know if this matters or not but while on the dyno as he bumped up timing the HP and TQ went up as well. By lower the timing to 14 isin't that going to lower HP? If i do lower timing to 14 and run 87 octane how am I able to tell if it is detinating or not. I never experienced it before.