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Thread: ? about nitrous tune
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11-15-2008, 10:34 AM #1
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White- 99Trans am
? about nitrous tune
i have a 99 trans am cammed stalled and nitrous full bolt on running a 12.5 at 107 on motor and a 12.00 at 112 with 150 n2o my car has 28 deegree's timing and i am assuming its pinging when i hit the nitrous and pulls all the timing any suggestions and help will be appriciated. From what i know a 150 shot should drop more than a second.
mods. fipk K&n 80mm tb bbk {bbk ssi intake manifold LT headers slp lm1 150 tnt purple power ring 3.73 gears tci 3500 stall 224/224 545/545 114 lsa ford 30lb injectors and a tune
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11-15-2008, 11:16 AM #2
I run the 150 dry shot, and gain about a 1/2 sec in the 1/4...
My timing is at 26 @ WOT.
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11-15-2008, 01:54 PM #3
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White- 99Trans am
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11-15-2008, 02:16 PM #4
My best, last weekend, 10.72 @ 124 mph / 1.39-60'
Hot & Humid days, it will be 10.90's to a 11.0 range.
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11-15-2008, 02:32 PM #5
We do have about the same build... My cam is bigger. 571 / 578 lift with 1.85 rockers that takes it just under 600 lifts. I have a 4600 locker stall, Wien intake with the 80mm BBK. Heads ported to hell & back. Do you use HP Tuners ?
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11-15-2008, 02:51 PM #6
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White- 99Trans am
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11-15-2008, 03:00 PM #7
One of my biggest gains was porting the heads with the LT's...
If you had the HP Tuners, I was going to email my tune to compare notes.
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11-15-2008, 05:03 PM #8
put timing to 25*. all stock my black car went 13.60 @ 101. with a 150 shot it went 11.97 @ 117. so, you've got some things to work out.
Cold Air Intake, Muffler Delete, Vinci High Performance Dual Valve Springs, Hardened Pushrods, Yella Terra 1.85 Rockers, Some Hydropdipped Stuff, Strut Tower Brace, Some SS Badges, boost/vacuum gauge, fuel pressure gauge, some checkered stripes, drilled/slotted rotors, ZL1addons Stealth wickerbill, Ruxifey LED side markers
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11-17-2008, 10:53 AM #9
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White- 99Trans am
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11-17-2008, 10:56 AM #10
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White- 99Trans am
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11-17-2008, 12:11 PM #11
Is there any KR during the run ? (*some* isn't ok)
What is the AFR on the bottle?
What was the bottle pressure?
5MPH gain is wayyy low for that shot.
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11-17-2008, 02:41 PM #12
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White- 99Trans am
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11-17-2008, 04:57 PM #13
14.7 is break-your-motor-into-bits territory; I'd advise you to stay out of it until you can get it adjusted in the presence of a wideband.
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11-18-2008, 09:58 AM #14OMGls1jzGuest
what should the afr be at? 13.5s at the leanest?
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11-18-2008, 04:58 PM #15
12.6-13.ish N/A (different setups like different things) and 11.5ish on the bottle.
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11-19-2008, 10:15 AM #16
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White- 99Trans am
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11-19-2008, 03:41 PM #17
It's no trouble.
Why not call your tuner since you have it tuned previously? Tell him you just want him to make it ok on the spray. Since the car has already been tuned, he should be able to get it right in only 2 or 3 pulls assuming there are no mechanical issues. I have an on-dyno or street touch up fee for cars that add the bottle, add more boost, etc that is a small fraction of the cost of full tuning.
Or buy HPT Pro and DIY
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