TBI Throttle Body Injection discussion and questions. L03/CFI tech and other performance enhancements.

1st time at track (times within)

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Old Jul 23, 2001 | 01:17 PM
  #1  
88 Camaro SC's Avatar
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From: Whidbey Island
Car: 99 Trans Am
Engine: LS1
Transmission: 4L60E
1st time at track (times within)

I made it to the track for the first time yesterday for the High School Days races. It was something I was anticipating for the past month. First of all, I had a lot of fun. It was sweet being able to fly down the track in my car. And even though it was my first time drag racing, I was still disappointed in my times. Oh, my Camaro is a mostly stock 1988 A4 TBI305 (the few mods are in sig)

Best reaction: .180
Best 60': 2.389
Best 1/8: 10.966 @ 63.890
Best 1/4: 17.118 @ 79.079

The weather was pretty hot and humid for the first couple of races, but got a little better later on. I've heard from you guys that my TBI 305 should be able to run mid 16's, but I guess that's with a good driver and good weather. Or is there something wrong? Well anyway, thanks for your time guys.

Nate

------------------
1988 Camaro Sport Coupe
  • Custom Interior
  • K&N Air Filter
  • Custom Ram Air
  • 180* Stat
  • Shift Improver Kit

Homepage: www.rsdragster.cz28.com
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Old Jul 23, 2001 | 02:40 PM
  #2  
NJ SPEEDER's Avatar
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From: Ewing, NJ
it does sound like your car is a little down on power for some reason. a lot of factors could go into this, when was your last tune up/ oil change? how heavy is your car? did you have time to let the car cool off between runs?
a stock tbi should be able to run low 16's really.
the next time you go to the track try to let the car cool a little longer, lift the hood and turn the key to the run position so that the fan comes on. and try to get a fresh tune up into the car, you'd be surprised how much a little basic maintenence can help.
there is one thing it sounds liek you got perfect though, you had fun, and thats why we do this stuff. aprroaching 80mph and not having to watch for cops is pretty cool

lata
tim

------------------
91 Camaro RS-LO3,Auto.
14.209@95.46mph
Best 60' 1.917
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Old Jul 23, 2001 | 03:22 PM
  #3  
REVLIMIT's Avatar
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Joined: Nov 1999
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From: Hawaii
Car: 1984 Chevy Camaro
Engine: Built L98
Transmission: T-56 6 speed
hmmm...is your motor the same as teh RS? the LO3 motor? if so then your car should pop low 16's. My car when it just had a muffler. Was hitting 16.3

------------------
Chris
91 RS 305 TBI
Eternal Rev

Possibly one of the worlds only drifting Camaros!
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Old Jul 23, 2001 | 10:14 PM
  #4  
Keith5's Avatar
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From: Wilmington NC
Car: C1500
Engine: 350
Transmission: 700r4
Axle/Gears: 2.73
The best I've run so far is something like 17.2@78mph, I think I might need plug wires and a rotor. I'm also thinking my CAT might be holding me back, might be stopped up some.

I just found out that the track that I run at rises 72 feet from the finish line to the end of the runoff area, is everyone elses stips like this?
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Old Jul 23, 2001 | 11:19 PM
  #5  
One Eyed Jack's Avatar
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From: Hell, Michigan
ewwww gross, 17 seconds? Seriosuly dude, Kieth's 89 accord would stay with you...

------------------
1992 Pontiac Firebird
- 305ci V8 TBI / Automatic Trans / Loaded
- MODS: Edelbrock 14x3 Open Element Air Cleaner, Dual outlet exhaust
1985 Chevy Z28
- 350ci V8 TPI / Automatic Trans / Paid $200 for it
- In the process of restoration!
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Old Jul 23, 2001 | 11:21 PM
  #6  
My305camaro's Avatar
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From: Yorktown, VA
Keith 5- I live in VA too, where do you run at? Dinwhittey, Richmond, Maryland? I run at Dinwhittey and as far as I know there is no incline to the track, sure looks flat to me.

As far as the original post, be sure that your timing is set correctly. I never checked the timing the whole time I had the car untill after I started going to the track. It turns out that the previous owner had set the timing with out disconnecting the correct wire so the car was timed about 13 deg, retarted. My First track run was 17.4. Added a chip which increased timing and next run was 17.1. Then I did the exhaust, headers, high flow cat, and Flowmaster cat-back, and when I went to advance the timing a little I found the problem. Next track run was 15.9. Wow what a diference!! Stock RS w/ auto sould run 16.8-16.6. w/manual should run 16.1.

------------------
1991 Chevy Camaro RS TBI w/auto
Mods:
Edelbrock TES Headers, REALLY high flow cat, 2 1/2 in catback flowmaster, 160 stat, hypertech chip, MSD ignition (rotor, cap, superconduct. wires), Bosch quad4 plugs, open air filter, all TBI mods, no smog stuff, no EGR, lots of suspention and alignment upgrades, and a big Chevy bowtie sticker on the back.

Fastest e.t.:
15.68 @ 87.3mph
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Old Jul 24, 2001 | 02:47 AM
  #7  
Chuck!'s Avatar
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From: Dayton, O.
Car: 91 Camaro Z28
Engine: LS7
Transmission: M12/T56
Axle/Gears: 3.79
Hmm... your 60's are a tad high. How are you launching? I stall mine (before I had the posi) to about 1 grand and then just romped on it at go time. The nonposi would hook up fine like that and I'd cut a 2.30 60', sometimes high 2.9x. Lets see... I ran 16.40 @ at 80.40 with just the open element, and our elevation should be just about the same... so with some practice you'll be fine

It never hurts to tune up though!

------------------
Chuck Kulchar
1991 RS
Open Element w/K&N
3.42 - posi - disc
3" cat and Force II cat-back
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Old Jul 24, 2001 | 08:31 AM
  #8  
Keith5's Avatar
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From: Wilmington NC
Car: C1500
Engine: 350
Transmission: 700r4
Axle/Gears: 2.73
<font face="Verdana, Arial" size="2">Originally posted by My305camaro:
Keith 5- I live in VA too, where do you run at? Dinwhittey, Richmond, Maryland? I run at Dinwhittey and as far as I know there is no incline to the track, sure looks flat to me.</font>
I run at Bristol Dragway in Bristol Tennesee/Virginia.

http://www.bristoldragway.com/?CONTE...KIT=3120193775

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Old Jul 24, 2001 | 01:08 PM
  #9  
EROCK's Avatar
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From: Mingo Junction, Ohio
Where I run my car, it is an 1/8 mile track. I basicaly have no mods to my LO3 (internal anyway) and i am running 1.97 60 footers and 9.41 @ 72MPH. The tires that I am running are BFG comp TA ZR. When they are heated silghtly they hold like mad. I am a non posi one wheel-peeler as they call it also. I am not sure how that equates into 1/4 times however.
Eric

------------------
Teal 1991 Camaro R.S., T-Tops,
Leather, Re-worked 700r4 also w/kit,
MSD ignition, MSD 8.5 mm. superconductor wires,
MSD Coil, ADS superchip, Open element air cleaner,
K-n-N filter, Gutted cat, Flowmaster cat-back system,
Edelbrock TES headers, March 3piece billet underdrive pulleys
3.73 gears
http://www.geocities.com/gitarz2/camaro.html
I was shocked to see that companies sold a taillight
set for a rustang! Since when do they have taillights????
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Old Jul 24, 2001 | 01:45 PM
  #10  
HrdRockA4305's Avatar
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From: Peoria, IL
Hey, don't feel bad, i didn't do much better. Granted, i drove 95 miles up to the track after work that night and never had time to let the engine cool. All 3 runs were made with the motor at 220-230 degrees, which probably hurt me, and the first 2 runs i had a somone else in the car. I also only got to make 3 runs, so i haven't perfected my technique yet.

Best 60' = 2.658
1/8 = 10.752
best 1/8 mph = 65.15
1/4 = 16.807
best 1/4 mph= 81.04

these were all on different runs, they were each the best of 3. I was still only getting out of 2nd with like 200 feet of track left, i'm thinking the upcoming 3.73 is gonna help a lot! I've heard this is good for almost a 1/2 second, is this true?



------------------
88 Camaro (not an RS, or an IROC, justa camaro.)
305TBI/700R4/2.73
14" Open Element and Flowmaster 80 seires

Next up: headers and gears
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Old Jul 25, 2001 | 06:53 AM
  #11  
REVLIMIT's Avatar
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Joined: Nov 1999
Posts: 1,253
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From: Hawaii
Car: 1984 Chevy Camaro
Engine: Built L98
Transmission: T-56 6 speed
**** a low 60' time. I can only dream of one. The best I could get was a 2.4?? so ****ty.

------------------
Chris
91 RS 305 TBI
Eternal Rev

Possibly one of the worlds only drifting Camaros!
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Old Jul 25, 2001 | 10:29 AM
  #12  
My305camaro's Avatar
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Joined: May 2001
Posts: 201
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From: Yorktown, VA
My best 60 foot is a 2.212 with a stock tranny and 2.73 rear-end. I don't have any major engine mods, but even before my mods listed in signature, I ran low 2.3 to high 2.2's no problem. I do a small burnout to warm up the tires, creap up to the line to where I just to hit the "stage" beam, stall it up to 1500-1600, and push the gas as hard as I can on the third amber. Nothing to it!

------------------
1991 Chevy Camaro RS TBI w/auto
Mods:
Edelbrock TES Headers, REALLY high flow cat, 2 1/2 in catback flowmaster, 160 stat, hypertech chip, MSD ignition (rotor, cap, superconduct. wires), Bosch quad4 plugs, open air filter, all TBI mods, no smog stuff, no EGR, lots of suspention and alignment upgrades, and a big Chevy bowtie sticker on the back.

Fastest e.t.:
15.64 @ 87.8mph
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Old Jul 25, 2001 | 05:04 PM
  #13  
88 Camaro SC's Avatar
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Joined: Apr 2001
Posts: 125
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From: Whidbey Island
Car: 99 Trans Am
Engine: LS1
Transmission: 4L60E
No, I haven't done a tuneup in a while, that could be one. Another thing, I've been over-heating lately, so my dad tried adjusting the timing to make it better, which worked, so I know the timing isn't the best it could be if my car runs cooler. About the launching, I only have an open-dif too, and bring RPMS up to about 2G I think. I'm pretty sure I didn't slip on the line, but could be wrong since all the andreneline dulled my senses

Other than that, I probably could have cooled my car a little better. I even ran an 18.1xx 1/4 once, when it was pretty warm. Don't know, just hope the next times better

Nate
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