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

Only got 2 runs in...

Old Aug 21, 2003 | 02:05 PM
  #1  
96 WS6's Avatar
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Only got 2 runs in...

Best i could manage was a 13.85 @ 105.8 with an INCREDIBLY PATHETIC 60 foot of 2.45, worse than what I did stock... I was so dissappointed and I only got to run twice so I didn't even have a chance to run better. I'm so pissed I want to go back to the track next weekend. I know the car has a 12.9 in it. All I need is that 2.0 or 2.1 60 foot and it will go go go, I don't know how I'm going to do it on street tires though. Basically I'm pissed.
Old Aug 21, 2003 | 02:26 PM
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Have you spent any time on a dyno with wideband A/F ratio monitoring? Your car does not appear to be making very good power considering you have a blower... According to this formula, a trap of 105.8 is only 339 horse, or a good 50 off where even a small amount of boost should put you.

Here's the formula:
http://www.smokemup.com/auto_math/hp_mph.php
Old Aug 21, 2003 | 02:30 PM
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It's an extemely conservative mail order tune. Also, the trap should go up a little bit I just had two ****ty *** runs... on the other run I hit a 100 mph trap at 13.9 so that tells you. The car runs strong, I have run 03 cobras and won, I even beat an S281 saleen on the way back from the track. I would like a dynotune but **** it's expensive as hell. I need the money for other things like water injection and a cam.

I was estimating that my car was at about 370 +- 5 rwhp. I still think that's accurate I just need a few more chances at the track.

Also, I need some form of intercooling so badly... the difference in performance when my car is warmed up after a 2 hour drive to the track is incredible. I know my tune is hurting me too... honestly the car feels like it was stronger before the blower (unless in boost of course) What can I do to rid myself of that feeling?

Last edited by 96 WS6; Aug 21, 2003 at 02:34 PM.
Old Aug 21, 2003 | 02:36 PM
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What about the ignition? Have you monitored your spark advance at WOT? When I built my stroker, the spark retard was outrageous, but was easily fixed with an LT4 KM.

Good luck next time out. But I really think your car is capable of more HP than you are currently putting out.
Old Aug 21, 2003 | 02:45 PM
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There is a dyno shop there in freemont that does 3 runs for $65. I would go there see how much hp your putting down and to make sure everything is okay. I'm gonna go on the 3rd of next month. Was it real crowded over there i wanted to go but didn't get off work till 8pm
Old Aug 21, 2003 | 02:50 PM
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Originally posted by 96 WS6
The car runs strong, I have run 03 cobras and won, I even beat an S281 saleen on the way back from the track.
I doubt you are making 370 rwhp hp looking at your trapspeeds. 350 rwhp will get you atleast 112 mph trapspeeds in a 6spd car. Btw, s281's are dogs and even if it was an SC281 they still aren't competition for a mild bolton lt1.
Old Aug 21, 2003 | 03:59 PM
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Yea it was a supercharged 281 actually and I was just saying that I beat him I didn't say that meant my car had 370 rwhp...

Drewstealth - You are talking about going to the dyno shop in fremont right? ATP??? I'm down to ride over there with you, shoot me an email or a PM I need my damn car running right.

Josh 97 WS6 - What should be a good number for a spark advance at WOT to start out with? Doesn't the advance depend on RPM also? I also think that my car is capable of more HP but I need to tune it so it comes out. How would an LT4 KM help? I thought that with forced induction keeping the stock knock module is a little safer.

You don't understand how dissapointed I am that after all the work the best I could manage (even though it was only 2 runs) was a 106 trap speed. I know I can do a little better than that but I have felt my car was lacking since I installed the blower, now after those ****ty runs I'm sure of it. Every maintenance item is taken care of, all fluids are changed regulary, I mean this car is well taken care of. I garuntee that mechanically the car is running pefectly. WHAT DO I DO! I wanted to hit 12's so badly, and I know my car with the mods that it has should be able to hit it, I just need to tweak it.
Old Aug 21, 2003 | 04:13 PM
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Something is wrong power wise. Im trapping 104 on an n/a 383 at a DA of 8200 ft at bandimere. I would think with a blower, you should be trapping much higher than me especially with you at sea level.

Dont be too pissed at the ET, ET is all about traction. See sig.
Old Aug 21, 2003 | 04:29 PM
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u ran at cali speedway?
Old Aug 21, 2003 | 04:56 PM
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sacramento raceway... I had a feeling my tuning was messing **** up. I want to possibly learn how to use lt1 edit and tune it myself. Can I download it somewhere?
Old Aug 21, 2003 | 05:01 PM
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I will pm you and let you know for sure.
Old Aug 21, 2003 | 05:11 PM
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Let me know I'm down to go any time.
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