Went to the Track

leathernotch

New Member
Oct 14, 2006
41
0
0
4 runs
on 275/45/17 street tires 28psi
first run
60-2.621

1/8mph-80.42
1/8mile-9.746

1/4mph-102.93
1/4mile-14.561

second run
2.359

78.04
9.510

101.04
14.444

third run
2.194

81.43
9.090

103.36
13.882

fourth run (short shifted 3rd and 4th)
2.054

81.34
8.963

102.62
13.792
 
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I was expecting low 13s maybe high 12s so I don't know. The plugs look white so thats running rich right. I don't know where we set the timing and the oil hasn't been changed in a while but I don't know what else I can do.
 
well your 60' times arent bad at all on the 3rd and 4th runs considering you are running on street tires with 3.73's and some power. If your plugs are whitish that means you are actually running a little lean. I would check the timing and set it to about 12-14° and make sure you arent getting any detonation. What rpm are you shifting at? Times are OK...but your speed says that there are mid to low 13's in there? What rpm are you launching at?
 
Car should have more mph, and you will get better 60's. You should be in the mid to high 200s to the tire, and that should land you 105+ mph. I would get it on the dyno and check it, sounds like an off tune to me. The 60's will drop with practice, this past weekend I went 1.91 on 18" street radials, and with 106 mph traps was in the high 12s, so you have more in it! Keep trying at it, they will come.
 
Yea lean what did I say idk?
The fuel pressure is at 38 so maybe 44 someone said
Timing I am going to check
It feels like its lacking in 3rd and 4th so maybe I can pick up somemore mph
What should I gap the plugs at???
 
Never tuned
I am shifting at 6000 I think the 4th run I shifted at 5500 but I don't know I think I do it by ear a little... but everone said it sounded like I short shifted on the third and 4th so I think 5500 is to low
 
Maybe I should move this to tech now.......

I checked the fp and at idle with vacuum off fp was at around 42

So... Only if timing is to far advanced should it be running this lean right?

Or I have maxed out the injectors??
 
19s should be plenty for that combo. i had similar mods making the same mph as you, i have thumpers, b-cam and a typhoon and N/A i ran a best of 13.3 103 it had alot more in it, could have went high 12s with a tune but then i added the SC and its got more power now.

just get the 60' down

and when you check the FP with the vac line off, make sure you plug the line with your finger

and what i would do, adjust the FP HIGH, like 46 psi
drive the car and feel how its acting, then adjust again and then turn it down to say 35-37 and drive it again. which ever ran better, more or less FP, if it runs better with more pressure then, keep it higher and starting fine tuning it to where it feels good. You cant really find the perfect setting without a dyno.. but you can get in the ballpark.

its hard to say like "run 40 psi" or 35 or whatever, each car is different, even if built with the exact same parts. every engine is a little different and likes different things.

good luck