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? about nitrous tune

This is a discussion on ? about nitrous tune within the Computer & Tuning forums, part of the LSx Technical Help Section category; i have a 99 trans am cammed stalled and nitrous full bolt on running a 12.5 at 107 on motor ...

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    ? 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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    Senior Member bills98ta's Avatar
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    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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    Quote Originally Posted by bills98ta View Post
    I run the 150 dry shot, and gain about a 1/2 sec in the 1/4...
    My timing is at 26 @ WOT.
    what is your 1/4 mile time and speed if you dont mind me asking

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    Senior Member bills98ta's Avatar
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    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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    Senior Member bills98ta's Avatar
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    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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    Quote Originally Posted by bills98ta View Post
    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 ?
    i dont i get it tuned and he uses hp tuners

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    Senior Member bills98ta's Avatar
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    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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    Senior Member mrr23's Avatar
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    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.

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    Quote Originally Posted by bills98ta View Post
    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.
    it would be great if you can email me your tune. if you can i will appriciate it.

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    Quote Originally Posted by mrr23 View Post
    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.
    i would like your suggestions in what to do because i cant get my car into the 11 to save my life any help will be appriciated. ( i hit the nitrous off the line stalling at 2500 rpm 1.55 60ft hitting a 12.00 112mph

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    TunedbyFrost.com Tuner Frost's Avatar
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    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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    Quote Originally Posted by Frost View Post
    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.
    14:7:1 afr bottle pressure 950psi it detects no knock

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    TunedbyFrost.com Tuner Frost's Avatar
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    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.

  14. #14
    OMGls1jz
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    what should the afr be at? 13.5s at the leanest?

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    TunedbyFrost.com Tuner Frost's Avatar
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    12.6-13.ish N/A (different setups like different things) and 11.5ish on the bottle.

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    Quote Originally Posted by Frost View Post
    12.6-13.ish N/A (different setups like different things) and 11.5ish on the bottle.
    sorry frost i dont rember exactly where more or less should my afr be

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    TunedbyFrost.com Tuner Frost's Avatar
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    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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