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View Poll Results: A TPI 305 AUTO with a 2.73 posi-rear will allow you to:
Run lower than a 2.3 60' w/ traction
8
72.73%
Run NO lower than a 2.3 60' w/ traction
3
27.27%
Voters: 11. You may not vote on this poll

Took the IROC to the track...this can't be normal?

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Old 06-01-2003 | 04:11 PM
  #1  
ROC-Z's Avatar
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From: Dayton OHIO
Took the IROC to the track...this can't be normal?

This was my first time ever running at a track, and I was able to get three runs in before the rain. I had a good time...a lot more fun than I expected actually.

I ended up over compensating on fuel at the gas station. I thought I'd use more fuel on the way to the track than I did. Getting to the track, I ended up with 3/4 of a 15.5 gal tank.
Next time, I'll use the track's gas.

I have a '86 w/ Tuned Port 5.0 & posi 2.73.

My best 60' of all 3 runs was a 2.308, and I had good traction on that run. Is this normal? Or is it the extra 62lbs of fuel causing this, since I should have only had a 1/4 tank of gas?

What is the normal 60' time for this setup? under 2.0?

What's the normal 1/4 mile times I should be pulling with this setup? 15.0 - 15.5?

The car runs rich (no codes), but I don't think it's enough to throw my time off by a full second, or half second.

I can't pull below a 2.3 60 foot!!! So what gives?

If I would have pulled a 2.0 60', I would have ran a 15.4.....


Run #2
reaction---1.36
60'---------2.30
330'-------6.69
1/8-------10.29
MPH------63.49 mph
1/4-------16.08
MPH------84.71 mph

Run #3
reaction---.810
60'---------2.33
330'--------6.79
1/8---------10.43
MPH--------67.16 mph
1/4---------16.23
MPH--------85.19 mph
Old 06-01-2003 | 06:16 PM
  #2  
25thmustang's Avatar
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From: CT
Car: Mustang
Engine: Bolt Ons
Transmission: Stock
Axle/Gears: 3.73
If you got good traction it could easily mean you are not making good power. If the car hooked and went then it bogged the motor down and you arent going to improve without performance mods. Try leaning it out (AFPR) and definately have less gas in the tank (although that is not really the issue).

I had this same issue with my AOD and the best I could pull was a 2.18 60' with perfect traction. With no tire spin you arent losing anything off the line. This is where a 5-speed would help (I pulled a 2.05 with the same set-up spinning the tires) allow you to get out of the hole.

Get the rich issue fixed, use less gas, and if that fials get a converter, gears and tires and those 60's should drop alot!
Old 06-01-2003 | 06:58 PM
  #3  
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From: Dayton OHIO
Originally posted by 25thmustang
If you got good traction it could easily mean you are not making good power. If the car hooked and went then it bogged the motor down and you arent going to improve without performance mods. Try leaning it out (AFPR) and definately have less gas in the tank (although that is not really the issue).

I had this same issue with my AOD and the best I could pull was a 2.18 60' with perfect traction. With no tire spin you arent losing anything off the line. This is where a 5-speed would help (I pulled a 2.05 with the same set-up spinning the tires) allow you to get out of the hole.

Get the rich issue fixed, use less gas, and if that fials get a converter, gears and tires and those 60's should drop alot!
Hey thanks for the suggestions. I see members here all the times with stock LB9's cutting 1.8 60's and hitting 15.0-15.0 1/4 times.

I was disapointed when I picked up my time slip. The car runs pretty good, except some richness (a small puff of black smoke only when hammered). So I thought for sure I'd see a 15.xx on my slip. I didn't.

I was talking to Vader about the richness, and he gave me a good bit of detail of checking the injectors along with the CTS sensor values with a VOM, since I need to get a serial adapter for my AKM cable and laptop. So, I guess I'll address this next & head out to the strip afterwards.

Anyone else's track promoting the NHRA Street Legal Drags?
This past Friday was the first night for it....everyone had a blast, so KilKare dragway is going to host is again this coming Friday.
Here's a shot of what was there. I'm all the way at the back, where you can't see me
Hours before these pics were taken, it was nothing but MUSCLE CARS! Camaro's, Firebird's, Mustang's....you name it. Later on, all the r!ce started crawling out all over the place like the plague.



Last edited by ROC-Z; 06-01-2003 at 07:02 PM.
Old 06-01-2003 | 07:17 PM
  #4  
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From: CT
Car: Mustang
Engine: Bolt Ons
Transmission: Stock
Axle/Gears: 3.73
That first pic looks like a K-Mart parking lot.

Our track has street legal drags all the time (every Wednesday night) and it is fun. I usually compete in the bracket series so I get at least 3 runs, I just dont like the fact that sometimes I have to use the breaks (not fun when racing).

Hey good luck with getting those 60's down, and dont worry, it doesn't sound too rich at all.
Old 06-01-2003 | 07:34 PM
  #5  
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From: Dayton OHIO
Originally posted by 25thmustang
That first pic looks like a K-Mart parking lot.

Our track has street legal drags all the time (every Wednesday night) and it is fun. I usually compete in the bracket series so I get at least 3 runs, I just dont like the fact that sometimes I have to use the breaks (not fun when racing).

Hey good luck with getting those 60's down, and dont worry, it doesn't sound too rich at all.

LoL, YEAH it does look like a K-Mart parking lot...rofl

It didn't when I first arrived about 6pm though...holy hell I was scared rolling up in my bone stock IROC-Z!
Everywhere you turned were heavily modded Stangs, Camaro's, and Transams...all with their hoods up showing off (& cooling off too).

All you could hear for the first couple hours after I arrived, was strictly mean-*** sounding V-8's. As the night progressed, that sound faded into pissed off weed-wackers and bumble bee's. Sad really. The average ET's faded also....11.0-13.5 from the V8's, down to like 16.0 to 19.0 with the r!ce.

Any how, I plan to make it back this Friday night regardless if I get the richness figured out. It was a blast!

Last edited by ROC-Z; 06-01-2003 at 07:36 PM.
Old 06-01-2003 | 07:59 PM
  #6  
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From: parishville NY upstate
Car: 86 IROC-Z
Engine: 305 TPI
Transmission: 700R4
Axle/Gears: 3.42s/posi/disc
ahhh

do your self a big favor and get ur self 3.73s for that beast of yours.
Old 06-01-2003 | 09:02 PM
  #7  
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From: Buffalo, NY
Car: 1988 IROC-Z
Engine: 427 SBC
Transmission: ProBuilt 700R4
Axle/Gears: Moser 12 Bolt / 3.73 TrueTrac
The best 60ft I could cut with my car was a 2.206 with decent traction.


I got the 2.77 9 bolt posi.


I'm sure I could have gotten it down a bit more, but I didnt run my car too many times. My buddys 95 z28 couldnt cut nothing better then a 2.2 that day either, weird.

Last edited by IROCThe5.7L; 06-01-2003 at 09:05 PM.
Old 06-01-2003 | 11:45 PM
  #8  
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From: Milwaukee, Wisconsin
Car: 1982 Trans Am
Engine: LG4
Transmission: 200C
Axle/Gears: 3:73
Run #2
reaction---1.36
60'---------2.30

Run #3
reaction---.810
60'---------2.33

Something about your reaction time and 60ft time don't make sense. Are you sure you pulled a 1.36 r/t and had the fastest 60ft time with a 2.3?
Old 06-01-2003 | 11:55 PM
  #9  
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From: Buffalo, NY
Car: 1988 IROC-Z
Engine: 427 SBC
Transmission: ProBuilt 700R4
Axle/Gears: Moser 12 Bolt / 3.73 TrueTrac
Originally posted by TransAm12sec
Something about your reaction time and 60ft time don't make sense. Are you sure you pulled a 1.36 r/t and had the fastest 60ft time with a 2.3?

I thought r/t had nothing to do with your times? It dosent start until your car leaves the line......?


<==I dunno, Just wondering.
Old 06-02-2003 | 01:05 AM
  #10  
Vicious 88 GTA's Avatar
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From: Rio grande Valley, Texas
the 86 Iroc's need help....they have a weak as heck cam, the smallest lobes on a TPI ever, and the 2.73's are doing you any good...get some 3.73's, some headers and full catback, a cold air intake and some porting on those heads, but beofre gettin a stall, get a cam that can produce power to keep that converter moving fast!!!....AARON
Old 06-02-2003 | 02:43 AM
  #11  
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From: Rocklin, CA
Engine: 355 TPI
Transmission: 700R4
IROCthe5.7, I do believe you are correct...reaction time has nothing to do with your 60' times or ET.
Old 06-02-2003 | 09:47 AM
  #12  
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wow that race track is pretty packed, its been awhile since racing at my local track.

if you dont want to go that high in gear ratio, a 3.42 set would be a big improvement, alot better than those 2.73's.

yeah but with a r/t over 1 second u must of feel asleep. j/k
Old 06-02-2003 | 05:21 PM
  #13  
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From: Dayton OHIO
Originally posted by TransAm12sec
Something about your reaction time and 60ft time don't make sense. Are you sure you pulled a 1.36 r/t and had the fastest 60ft time with a 2.3?
Yep positive.
R/T only tells you how quick you reacted to the green light.

My very first run-
- I fouled the light
- I spun till 2nd gear
- Had a 3.76 60'
- Had a 17.90 ET
- And still trapped 85mph, like in all my runs

I'm sure I wasn't the only one laughing at myself.
Old 06-02-2003 | 05:27 PM
  #14  
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From: Dayton OHIO
Originally posted by MdFormula350
wow that race track is pretty packed, its been awhile since racing at my local track.

if you dont want to go that high in gear ratio, a 3.42 set would be a big improvement, alot better than those 2.73's.

yeah but with a r/t over 1 second u must of feel asleep. j/k
I've been thinking more about the 3.42's over anything, since I'm planning on keeping a LTR setup. I think gears and stall will be my next mod's.

Yeah, anything over a 1.xx is sleeping on the light. This was the first time I've been to a track, so I was trying to get the hang of everything.

First run- I fouled the light
Second run - I tried to be less gas pedal happy
Final run- I got a better feel for it with a .810 R/T

I want to go back this Friday to try and get better with the driving. It's almost addictive

Last edited by ROC-Z; 06-02-2003 at 05:30 PM.
Old 06-02-2003 | 06:40 PM
  #15  
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From: Milwaukee, Wisconsin
Car: 1982 Trans Am
Engine: LG4
Transmission: 200C
Axle/Gears: 3:73
So whats the point of the R/T? Is it only for Bracket Racing?
Old 06-02-2003 | 07:19 PM
  #16  
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From: CT
Car: Mustang
Engine: Bolt Ons
Transmission: Stock
Axle/Gears: 3.73
Originally posted by TransAm12sec
So whats the point of the R/T? Is it only for Bracket Racing?
No it matters in heads up racing even more.

If you run a 13.5 and another guy runs a 13.6, you think you won. But if you had a 1.2 reaction time and he had a .8, he wins!
Old 06-02-2003 | 08:33 PM
  #17  
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From: Milwaukee, Wisconsin
Car: 1982 Trans Am
Engine: LG4
Transmission: 200C
Axle/Gears: 3:73
wow my head has been messed up for some time. Its all clear now.

The first time I'm going to the track my r/t will be slower then my 60ft.
Old 06-02-2003 | 09:55 PM
  #18  
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From: FL
Car: 1991 Z28 - 2000 Z28
Engine: L98 - LS4
Transmission: 700R4 - 4L60E
Axle/Gears: 3.23's - 3.73's
My 86' came stock w/ 3.23's and would click off low 2.0 - high 1.9 sixty's on radials. Around the same time I owned an 89' LB9 A4 vert w/ 2.73's. It would do low 2.1's avg. & occasionally dip into the 2.0's on a good night.

Both cars were very lightly modded and had stock, worn suspension.
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