C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

C4 60-130 mph thread.

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Old Apr 10, 2020 | 04:54 PM
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Default C4 60-130 mph thread.

  1. 5.15 s: 84 big inch single turbo.
  2. 7.87 s: see Crispy video below (20.69 s-12.82 s time extracted from Stats for nerds). 7.76 s extracted from 0-130 video (even better).
  3. 8.42 s: 84 6.0 LS swap, TKO 5 speed.
  4. 9.85 s: 86 auto, Procharger.
  5. 10.33 s (estimate): 93 6-speed, Procharger (+4 frames for 128-130 mph interval, -1 frame for 58-60 mph interval = 93 frames, assume 9 hz, otherwise show me the data!).
  6. 13.129 s: 88 auto, Paxton, 2:59 gear.
  7. 13.6 s: 93 ZR1 (caranddriver May 1993).
  8. 18.6 s: 96 Grand Sport (caranddriver Jan. 1996).
  9. 19.1 s: 92 6-speed (caranddriver Jan. 1991).
  10. 36 years and still counting...: 84 auto.
  11. ?

Last edited by tequilaboy; Oct 17, 2020 at 08:13 PM.
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Old Apr 10, 2020 | 05:45 PM
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Here's one to get things started: https://datazap.me/u/tequilaboy/6013...mark=5669-5757
86 auto, 4L80E, 3.73 gear, 383 w-heads, cam, blower, bolt-ons: 9.85 s.

Note: Time difference according to log = 9.85 seconds, but there were only 88 samples over the interval, so the average sample rate = 8.934 samples per second. The number of samples cannot necessarily be trusted as an accurate indicator of time since the actual frame rate can vary.

Last edited by tequilaboy; Apr 18, 2020 at 03:05 PM.
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Old Apr 10, 2020 | 06:56 PM
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1984, 6.0 LS swap, TKO 5 speed


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Old Apr 10, 2020 | 08:14 PM
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Originally Posted by tequilaboy
  1. 84 6.0 LS swap, TKO 5 speed, 9.23 s.
  2. 86 auto, 9.85 s.
  3. 93 ZR1, 13.6 s. (caranddriver May 1993).
  4. 96 Grand Sport, 18.6 s. (caranddriver Jan. 1996).
  5. 84 auto, 36 years and still counting...
  6. ?
  7. ?
  8. ?
  9. ?
  10. ?

nothing beats an 86 auto on these kinds of pulls
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Old Apr 10, 2020 | 08:18 PM
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If I wasn't scared shitless for the tires I'd give her a whirl. Had her up to a buck twenty or so last week and it definitely needs some work before I'd attempt that or anything higher again...but from a stand still to that speed I was coasting down from there probably a little more than a quarter mile. Its about 4000 feet exit to exit. The on ramp is probably 800 feet from the traffic light. 4800 feet to the next exit and I was halfway there or not even when I backed out of it... soo... if i were to guesstimate, maybe right at 18 seconds?
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Old Apr 10, 2020 | 10:23 PM
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60 steady roll and punch it, or already accelerating?

Does it make a difference?

How about from a 50 roll? Old cam, no nitrous, a little less boost.




Last edited by TravisSchoech; Apr 10, 2020 at 10:28 PM.
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Old Apr 10, 2020 | 10:42 PM
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Originally Posted by TravisSchoech
60 steady roll and punch it, or already accelerating?

Does it make a difference?

How about from a 50 roll? Old cam, no nitrous, a little less boost.


Already accelerating would likely give the best results. My times are from some dragy gps 1/4 mile street runs. Since there is no marked finish line on the street I just pulled to 130ish. Did three in a row and got 9.23s, 9.24s and 9.28s for 60-130. The quarters were 11.87 @122, 11.90 @ 122 and 12.0 @ 122.
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Old Apr 10, 2020 | 10:57 PM
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Originally Posted by Krusty84
Already accelerating would likely give the best results. My times are from some dragy gps 1/4 mile street runs. Since there is no marked finish line on the street I just pulled to 130ish. Did three in a row and got 9.23s, 9.24s and 9.28s for 60-130. The quarters were 11.87 @122, 11.90 @ 122 and 12.0 @ 122.
Krusty,

I tried breaking the video down to sub 1-sec, but i can't. Scrubbing as slow as i can, its pretty close to 8sec from 50-130 already on the gas. Consistently traps 130+ in the 1/4mi with no prep, BUT no clue on the ET.
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Old Apr 11, 2020 | 01:17 AM
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Originally Posted by TravisSchoech
Krusty,

I tried breaking the video down to sub 1-sec, but i can't. Scrubbing as slow as i can, its pretty close to 8sec from 50-130 already on the gas. Consistently traps 130+ in the 1/4mi with no prep, BUT no clue on the ET.
Comparing some dragy times off of the app's leaderboard.....Several that trap ~130 in the quarter are in the low 7s for 60-130. Some guys trapping 135ish are in the high 6s. I would imagine you are deep into the 7s.

Last edited by Krusty84; Apr 11, 2020 at 01:18 AM.
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Old Apr 11, 2020 | 12:57 PM
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Originally Posted by Krusty84
Comparing some dragy times off of the app's leaderboard.....Several that trap ~130 in the quarter are in the low 7s for 60-130. Some guys trapping 135ish are in the high 6s. I would imagine you are deep into the 7s.
Well hell yeah then.
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Old Apr 11, 2020 | 01:21 PM
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This might be interesting.
In the 90's Massachusetts had strict emissions visual and roller testing, I couldn't even touch the catalytic converter.
Paxton Superchargers some how managed a blanket CARB EQ, that covered all GM TPI motors.
I installed a kit from BlowerWorks and passed testing for years with paper work in hand.
Data bellow is a stock L98 with only Arizona large tube runners and a cat back exhaust.



I did hundreds of 0 to 150 tuning runs over the years, but they are very hard to sort through, I didn't label anything.
The interesting part is the first data bellow is with the stock 2.59 rear end, the second a few weeks later, same exact car with a 3.54 rear end.
Funny thing is the 3.54s are faster than the 2.59s in the quarter mile by 0.39 sec, but slower to 140 mph by 0.39 sec. and 0.73 sec slower 60 to 130 mph than the 2.59s.
Probably can blame the low fourth gear overdrive gearing.

1988 L98 Automatic:

2.59 gears:
60 foot (no rollout) = 2.257 sec
1/4 mile = 12.942 sec @ 112 mph
0 to 60 mph = 4.565 sec
0 to 140 mph = 20.955sec
60 to 130 mph = 13.129 sec

3.54 gears:
60 foot (no rollout) = 2.059 sec
1/4 mile = 12.553 sec @ 112 mph
0 to 60 mph = 4.074 sec
0 to 140 mph = 21.340 sec
60 to 130 mph = 13.856 sec





Last edited by SuperL98; Apr 17, 2020 at 10:18 AM.
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Old Apr 11, 2020 | 01:31 PM
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Originally Posted by TravisSchoech
Well hell yeah then.
Yup. I was quite surprised to see my 60-130 times. I knew the dragy recorded that but never checked them until the other day when I saw the C8 does 60-130 in 10.2s

I think with my new transmission I can get my time in the high 8s. She is shifting liking butter on no lift shifts now. No more granny shifting and jamming through worn synchros.
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Old Apr 18, 2020 | 08:49 AM
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Anyone else?
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Old Apr 18, 2020 | 09:11 AM
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Originally Posted by TravisSchoech
Anyone else?
I'm going to start going through my front end. Give me a bit.
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Old Apr 18, 2020 | 09:26 AM
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Sorry. I can only estimate something in the low 9 second range for my own car, but don't have much data over 120 mph to back it up.

Notably absent: times from LT1/LT4/LT5 crowd (except for the magazine times already posted).

I did find a 2018 V6 Camry test of 20.5 seconds to serve as a sort-of low bar. Also interesting to note: 93 Supra Turbo (15.3 seconds). Source for both: caranddriver.

Last edited by tequilaboy; Apr 18, 2020 at 09:37 AM.
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Old Apr 18, 2020 | 09:36 AM
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Originally Posted by tequilaboy
Sorry. I can only estimate something in the low 9 second range for my own car, but don't have much data over 120 mph to back it up.

Notably absent: times from LT1/LT4/LT5 crowd (except for the magazine times already posted).

I did find a 2018 V6 Camry test of 20.5 seconds to serve as a sort-of low bar. Also interesting to note: 93 Supra Turbo (15.5 seconds). Source for both: caranddriver.
For the LT5 guys, you may be better in the ZR1 section. Granted there aren't a whole bunch to begin with.

As far as the rest... suprised Diz doesn't have data like that.. he's LT1 right?
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Old Apr 18, 2020 | 11:08 AM
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To C4 60-130 mph thread.

Old Apr 18, 2020 | 11:29 AM
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Originally Posted by 84 4+3
For the LT5 guys, you may be better in the ZR1 section. Granted there aren't a whole bunch to begin with.

As far as the rest... suprised Diz doesn't have data like that.. he's LT1 right?

i would like to know a good camera setup that will record this stuff !


i guess i could estimate it from a datalog from a drag run.

i usually stay on the gas past the finish for a little bit for tuning purposes

Last edited by dizwiz24; Apr 18, 2020 at 11:30 AM.
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Old Apr 18, 2020 | 11:42 AM
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Originally Posted by 84 4+3
For the LT5 guys, you may be better in the ZR1 section. Granted there aren't a whole bunch to begin with.

As far as the rest... suprised Diz doesn't have data like that.. he's LT1 right?

58 to 128 is the best I had data on. 9.0 seconds based of going from frame 6996 (58 mph) to 7086 (128 mph).

Note that i had 12 degrees knock retard come on in 3rd gear
90 frames elapsed , 10 Hz data capture rate = 9 seconds

this was on a 12.2 drag run. With a lousy 2.3 60 ft

due to the knock retard...
i reduced timing a degree or two up top for the next run.
i got down to a 2.0 60 ft on the next run but my lf muffler slip pipe blew off in 2nd gear at 6000 rpm. I let off bc i thought i blew the engine. should have stayed on it !

I became discouraged and drove home to lick my wounds
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Old Apr 18, 2020 | 11:52 AM
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Originally Posted by tequilaboy
is it just the camera angle or was that down hill? Badass either way.
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