3rd Gen / L98 Engine Tech 1982 - 1992 Engine Related

Tuning help, track times fell off..

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Old Jul 8, 2002 | 01:47 PM
  #1  
SnkSknrZ28's Avatar
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From: Buffalo, (Cheektowaga), NY
Post Tuning help, track times fell off..

Ok well as said above i went to the track over the weekend and my times fell off, y? i have no clue.. all stock my car ran a 15.08 @ 92.5mph.. i've done all the mods in my sig this past winter and went to the track, the car ran a best of a 14.04 @ 97mph, consistant 14.1-14.3 depending on my fuel pressure and on my 60ft. time (2.01 is the best, averages about 2.02).. So anyways this past week i put on an MSD 6AL ignition box & Drag Radials and my car ran a best of a 14.65 @ 92mph!!!! what gives, faster ET than stock but the same MPH? yes weather condidtions are off a bit but that doesn't explain the lost 5 mph!! i'm not a happy camper, my cousin said the car launches awesome but then it just seems to fall on it face after that.. my Fuel pressure is set at 44psi, i started out at 46psi according to the dyno test results in the TPiS insider hints book, and as i brought the FP down it got quicker and i busted off the fastest ET, so i left it there, now like i said this weekend i haven't touched it and the cars runnin' slow again?? any help or suggestions??

------------------
1988 Camaro IROC Z28 (medium orange metallic)
LB9 305, G92 (3:23 gears)
Borla cat-back exhaust, AFPR (44psi), Port matched and polished entire TPi intake, Hedman Headers & Y-pipe, MSD 6AL Ignition, MSD Blaster coil, MSD wires and cap, TPiS Airfoil, Lakewood control arms, Hotchkis strut tower brace, B&M stage two shift kit, B&M Megashifter, Hypertech Thermochip, Hypertech 160* stat, Sub-frame connectors, K&N airfilter, !screens, Modified airbox, MJS ram air, Bypassed TB, deleted AIR
"1BAD 305"
WNYFA
www.UBRF.org
Check out my pix !!
My IROC Pix
More IROC Pix
Old Jul 8, 2002 | 03:30 PM
  #2  
Kraest's Avatar
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From: Inside Uranus
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This isn't an Advanced Question and should be posted in 3rd Gen Tech.

Mike

------------------
1994 Sunset Orange Metallic Camaro Z28 Convertible - The Gorgeous and Sadistic Bitch Who Mistreats You and Lets You Down, Yet You Still Keep Her


1989 Red Ford Mustang LX 5.0 Convertible - The Dependable Girl Who Treats You Right, Yet Your Mind Wanders Elsewhere
Old Jul 8, 2002 | 03:41 PM
  #3  
Injuneer's Avatar
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From: Hell was full so they sent me to NJ
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Moving to 3rd Gen Tech......



------------------
Fred
94 Formula A3: 381/TH400/N2O

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Detailed Mod's List
11.513@115.59 on motor; 11.162@127.67, 1.643 60' on a 125-shot. Going with a 275-shot this year
Old Jul 9, 2002 | 08:43 AM
  #4  
SnkSknrZ28's Avatar
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From: Buffalo, (Cheektowaga), NY
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TTT

------------------
1988 Camaro IROC Z28 (medium orange metallic)
LB9 305, G92 (3:23 gears)
Borla cat-back exhaust, AFPR (44psi), Port matched and polished entire TPi intake, Hedman Headers & Y-pipe, MSD 6AL Ignition, MSD Blaster coil, MSD wires and cap, TPiS Airfoil, Lakewood control arms, Hotchkis strut tower brace, B&M stage two shift kit, B&M Megashifter, Hypertech Thermochip, Hypertech 160* stat, Sub-frame connectors, K&N airfilter, !screens, Modified airbox, MJS ram air, Bypassed TB, deleted AIR
"1BAD 305"
WNYFA
www.UBRF.org
Check out my pix !!
My IROC Pix
More IROC Pix
Old Jul 10, 2002 | 09:34 AM
  #5  
SnkSknrZ28's Avatar
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From: Buffalo, (Cheektowaga), NY
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This is why i put this into Advanced Tech becuse nobody in 3rd gen Tech has a clue.. Forget it i'll figure it out myself, this web site is never any help to me, its all about i'm faster than u or i'm faster than him, when it comes down to real Q's they can't be answered.. Thanx but no thanx
Old Jul 10, 2002 | 10:24 AM
  #6  
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From: Winnipeg, MB.
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Lower your fuel pressure. Try 40psi with the vaccum line off. Also, be sure to run at a minimum 94 octane gas to fight off detonation. The leaner you run it, the more power you'll make, but you have to watch detonation because it'll slow you down and can blow headgaskets and pistons. Those drag radials may have more rolling friction as well and that will slow you down, but generally the superior traction will more then make up for it. Depends on the width of the stock tires, my car is actually faster with 26x8.5"'s instead of 26x10"'s. Track prep and ambient temp and wind direction/velocity can all have a large role in cutting the perfect times. What were the differenes in the 60' times? This can be a big indicator as well.
Old Jul 10, 2002 | 01:59 PM
  #7  
SnkSknrZ28's Avatar
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From: Buffalo, (Cheektowaga), NY
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<font face="Verdana, Arial" size="2">Originally posted by mike85gn:
Lower your fuel pressure. Try 40psi with the vaccum line off. Also, be sure to run at a minimum 94 octane gas to fight off detonation. The leaner you run it, the more power you'll make, but you have to watch detonation because it'll slow you down and can blow headgaskets and pistons. Those drag radials may have more rolling friction as well and that will slow you down, but generally the superior traction will more then make up for it. Depends on the width of the stock tires, my car is actually faster with 26x8.5"'s instead of 26x10"'s. Track prep and ambient temp and wind direction/velocity can all have a large role in cutting the perfect times. What were the differenes in the 60' times? This can be a big indicator as well. </font>
Thankyou very much for your help, i really appreciate it.. My 60' times were 2.01's, they didn't very too much, it was definatly hooking up good, however when i got about 100 feet out the car would just fall on its face, i know its got more in it, the cars fast for what it is, back about 3 months ago i tuned it and rattled off a 14.04 @ 97, i've spanked LT1's left and right, but now somethings wrong, i'm hoping its just the FP, or the car just need to be dialed in properly agagin due to the weather conditions.. i only run 94 Octane gas in it, full synthetic oil, its nothing but the best for my car.. i'll try out what you told me.. again thankyou for your help.. mike


------------------
1988 Camaro IROC Z28 (medium orange metallic)
LB9 305, G92 (3:23 gears)
Borla cat-back exhaust, AFPR (44psi), Port matched and polished entire TPi intake, Hedman Headers & Y-pipe, MSD 6AL Ignition, MSD Blaster coil, MSD wires and cap, TPiS Airfoil, Lakewood control arms, Hotchkis strut tower brace, B&M stage two shift kit, B&M Megashifter, Hypertech Thermochip, Hypertech 160* stat, Sub-frame connectors, K&N airfilter, !screens, Modified airbox, MJS ram air, Bypassed TB, deleted AIR
"1BAD 305"
WNYFA
www.UBRF.org
Check out my pix !!
My IROC Pix
More IROC Pix
Old Jul 11, 2002 | 04:02 PM
  #8  
Perry93TransAm's Avatar
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Joined: Oct 1998
Posts: 265
From: Kingfisher,Oklahoma
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Is it possible the Fuel pump is not keeping up, also the knock sensor could be sensing knock (like said) because youre running out of fuel. How much air are you running in your stickies? 2.01 60 ft is not really good for stickies. Whats your base timing set at? try 8 base (brown wire disconnected) with good fuel and all you should be ok , unless a sack blew over into your intake...lol
Also are you putting your foot al the way to the floor on the gas? Your floor mat may have gotten wadded up under it, I always remove my drivers side floor mat at the track just for this reason.
Perry
Old Jul 12, 2002 | 08:42 AM
  #9  
SnkSknrZ28's Avatar
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From: Buffalo, (Cheektowaga), NY
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geez man ur making it sound like i should be running mid 13's or something.. i wish.. in the sticky's i'm running 30psi.. and again remember i only have a 305, i dont have a 350 in there..
Old Jul 15, 2002 | 09:13 AM
  #10  
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From: Kingfisher,Oklahoma
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Dont dog the 305. they were just handicapped from the factory, youve made most of the mods to make them screamers. Try dropping the drag radials a little and really press the sucker off the line, If you drop a 1.9 or 1.8 youre in the 13s.
Perry
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