LT1 Based Engine Tech 1993-1997 LT1/LT4 Engine Related

Those of you who got WOT (only WOT) dyno tuning....

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Old Jun 17, 2003 | 08:07 AM
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treyZ28's Avatar
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From: looking for a flow bench so Brook and I can race
Those of you who got WOT (only WOT) dyno tuning....

How much did you pay and where did you go if its in michigan?

I want to do my own part throttle tuning but i'd rahter just let someoen adjust the WOT a/f and timing.

Cant seem to get a strait answer out of anybody. Some people are paying $5-600 for just 2 pulls at WOT tuning

for about doublt that, i'll just go DFI
Old Jun 17, 2003 | 08:56 AM
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Buy a wideband and do your own tuning. Its the same price as that, only if you change the setup its free to change your tune.
Old Jun 17, 2003 | 08:59 AM
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From: looking for a flow bench so Brook and I can race
Originally posted by Erik 94TransAm
Buy a wideband and do your own tuning. Its the same price as that, only if you change the setup its free to change your tune.
I've been debating that. Can tuner cat and the stock pcm use the WB at wot? i know the stock pcm doesn't use normal O2 sensors at WOT, but does it log ther readings????
Old Jun 17, 2003 | 09:18 AM
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$500-$600 for just 2 pulls of WB tuning....sounds fishy.

$500-$600 for for a good tune is more like it, but should take 3-4 hours, using XX runs to get it right, hence the price.

Each combo is different, requires playing with timing, fuel adjustment, fighting KR, patience and tweaking. But you already know this.
Old Jun 17, 2003 | 09:26 AM
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From: looking for a flow bench so Brook and I can race
Originally posted by CANTONRACER
$500-$600 for just 2 pulls of WB tuning....sounds fishy.

$500-$600 for for a good tune is more like it, but should take 3-4 hours, using XX runs to get it right, hence the price.

Each combo is different, requires playing with timing, fuel adjustment, fighting KR, patience and tweaking. But you already know this.
I just want basic WOT tuning (i can play with it later myself) but i want to be safe for now-

and i'll do the part throttle tuning myslef, i kinda want to tune myself.

i'll make some calls
Old Jun 17, 2003 | 10:02 AM
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Originally posted by treyZ28
i can play with it later myself
hehe.....juvenile humor got the best of me

Last edited by got_hp?; Jun 17, 2003 at 12:02 PM.
Old Jun 17, 2003 | 11:09 AM
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Typically shops charge 100-150/hour to tune, not just a lump sum. If it takes 2 hours @ 150/hour then you'll pay 300 bucks. That guy sounds fishy.
Old Jun 17, 2003 | 11:53 AM
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widebadns dont work with stock pcm trey. you have to have a standalone thing for that.
Old Jun 17, 2003 | 06:47 PM
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Trey,
You shouldn't do the wot tuning first. You should do your idle tuning, then your part throttle tuning, then wot.
And if you can do the part throttle stuff, you can do the wot stuff.
Let me know if you need help.

And yes, $500-600 does sound like too much considering you had me down to 2 McDonalds lunches!

Last edited by Dan K; Jun 17, 2003 at 11:33 PM.
Old Jun 17, 2003 | 07:00 PM
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Trey,

Dan's right on the money here. Do the idle and part throttle driveability stuff first. You don't need a WB to do that. You'll just be logging BLM's and probably tweeking injector constant for global changes and perhaps tweeking MAF calibration tables in some areas to account for some cam reversion and maybe some changes to the breathing characteristics. You may also have to tweek timing tables to improve throttle response or minimize cam surge. Part throttle stuff is actually the most difficult because you'll probably run into BLM splits between the left & right.

Then,

2 or 3 pulls on the dyno with a WB and you should have the PE table tuned to about 13.0 AFR across the board. 3 pulls costs me about $75. If you are bangin the knock sensor it might take another pull or two to retard the timing a bit.

Oh yea, If your running a boosted LT1 things probably will get way more difficult on a stock PCM.
Old Jun 17, 2003 | 11:30 PM
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SLP does WOT tuning for 125 I belive, and if you have an adjustable fuel pressure regulator they charge 825$ for like 3+ hours of WOT and part throttle tuning, the guy I talked to said they did some serious stuff. This was before I realised my insurance was 6,200$ a year
Im sure they have more options available, but are only located in NJ
Old Jun 17, 2003 | 11:41 PM
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Originally posted by m0nk
if you have an adjustable fuel pressure regulator they charge 825$ for like 3+ hours of WOT and part throttle tuning, the guy I talked to said they did some serious stuff.
$825! Boy that sounds like a great deal to me.
I don't know what they'd be doing with an adjustable fuel pressure regulator, but IMHO if you have the ability to modify tables in the computer than you should set the fuel pressure to whatever flow the injectors are rated at and then leave it alone.
Old Jun 18, 2003 | 12:13 AM
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I might be wrong about the fuel pressure regulator, that was a while ago, but i know it was 825$..... heres the link to their site
http://www.slponline.com/dyno_center.asp

after reading it over however, It seems that if your paying 500-600 at most places, here your paying an extra 205$ to say you were tuned by slp

Last edited by m0nk; Jun 18, 2003 at 12:16 AM.
Old Jun 18, 2003 | 07:10 AM
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From: looking for a flow bench so Brook and I can race
Originally posted by Dan K
Trey,
You shouldn't do the wot tuning first. You should do your idle tuning, then your part throttle tuning, then wot.
And if you can do the part throttle stuff, you can do the wot stuff.
Let me know if you need help.

And yes, $500-600 does sound like too much considering you had me down to 2 McDonalds lunches!
I'll upgrade one of those lunches to a BK meal if you mess with fuel pressure regulator

so whens my appointment
Old Jun 18, 2003 | 08:12 AM
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Trey: I posted this in a similar thread.

My friend Bob Kennedy does dynotuning and charges $125/h. Fully instruemented (2 wide band AF meters, up to 8 EGT probes, FP, IAT, MAP, water temp, oil temp, etc.). He does it all himself and has <40y high performance experience. Unless it were the ghost of Smokey Yunick doing the tuning or something like that, I'd say $385/h is absurd.

Rich Krause



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