LT1-LT4 Modifications 1993-97 Gen II Small Block V8

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Old May 14, 2012 | 11:51 PM
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I went to the track this last friday and I got some new numbers for the Corvette. I ran a 12.4@113.5. That's with 245(which are too small) and the original 3.07 gears. I'll bet with some wider tires and some 3.73's or 4.11 's she could break the 11's. I'm happy with the times, not too bad for a car with shitty gears.(I'm hitting 4th gear probably 50 feet from the line) haha Bogs bad off the line, I just need to fix that now and we'll be good! I was cutting 2.0 60's all day, got a 1.9 60' on my best run. Best MPH was 115. Mods are below.

LTx swap, "LE1.5" heads(Bought off a member at CamaroZ28, they supposedly flow in between LE1 and LE2 heads.), LE Custom Cam, LT's, 52mm TB, 30lb Injectors, MadZ28 Tune, T-56 swap, 3,07 POSI.

What do you guys think? Last year I ran a 12.9@111MPH with the stock headed, cc503, stock TB, mild bolt ons setup.

Last edited by v8vette84; Dec 19, 2012 at 10:07 PM.
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Old May 14, 2012 | 11:55 PM
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Here's a vid of the run. When I dropped the clutch the car started off quickly then the tires spun a little then she took off.
Don't forget to watch in 1080p!! haha

http://www.youtube.com/watch?v=FsDKmxFKqkk
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Old May 15, 2012 | 12:33 AM
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Get some drag radials and 4.10 gears and you MIGHT just be able to crack those 11's
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Old May 15, 2012 | 01:00 AM
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congrats. nice times
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Old May 15, 2012 | 06:39 AM
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I see no problem with 245/50/16s in a DR.....especially in a Vette
The addition of 4.10s would make a big difference, in the 5-7 tenths range... That cam is 100% capable of achieving SOLID 11 sec 1/4 mile times especially in a Vette.. great job..... What cold air do you have on there? I ask because a nice filter set up can be fabricated behind the license plate
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Old May 15, 2012 | 07:31 AM
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Nice job!
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Old May 15, 2012 | 09:47 AM
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Looks like fun, lil more work and you should be there!
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Old May 15, 2012 | 10:37 AM
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There will be a night and day difference if you change out to a steeper gear.
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Old May 15, 2012 | 01:36 PM
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Sounds like you're short shifting to me, leaving lots on the table. With your old 503 cam 12.0x's is the norm for that cam only. I would try 64-6500 shifts and see what happens.
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Old May 15, 2012 | 01:39 PM
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Oh yes , get some gears !!!!
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Old May 15, 2012 | 01:54 PM
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Originally Posted by lt1-xjs
Sounds like you're short shifting to me, leaving lots on the table. With your old 503 cam 12.0x's is the norm for that cam only. I would try 64-6500 shifts and see what happens.
x2....

shift at 6400 rpm, get a 4.10 or 3.89/3.91 and you will be one happy guy your next trip to the track....

you may need a better tire too once you put in the gears.
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Old May 15, 2012 | 01:57 PM
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Great times. If you get that 60ft down you will be in 11s with ease.
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Old May 15, 2012 | 04:01 PM
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nice times, id take em.

do you have a 91-96 rear bumper/tail lights?
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Old May 15, 2012 | 07:27 PM
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Originally Posted by lt1-xjs
Sounds like you're short shifting to me, leaving lots on the table. With your old 503 cam 12.0x's is the norm for that cam only. I would try 64-6500 shifts and see what happens.
The car doesn't seem to like to run out much past 6k. If I run her farther she seems to die off... Not sure why though.. The cam makes power to 6500 or something Lloyd told me. Any idea why I'm loosing power early? I have a full 3" exhaust, full length headers, magnaflow 3" mufflers, X pipe. Could it be the intake or heads?

I got this with the heads.

All Flow #'s are at 28" H2O on the same flow bench, operated by the same person.
-- Flow: --
Lift: Int/Exh:
.200 = 134/104
.300 = 190/144
.400 = 235/172
.500 = 257/191
.550 = 265/195
.600 = 265/200

Last edited by v8vette84; May 15, 2012 at 07:37 PM.
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Old May 15, 2012 | 07:30 PM
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Originally Posted by 96lt1m6
I see no problem with 245/50/16s in a DR.....especially in a Vette
The addition of 4.10s would make a big difference, in the 5-7 tenths range... That cam is 100% capable of achieving SOLID 11 sec 1/4 mile times especially in a Vette.. great job..... What cold air do you have on there? I ask because a nice filter set up can be fabricated behind the license plate
It's got a crappy air intake, It's using basically a flipped upside down B-body elbow with a hockey puck and then it runs right to the MAF then right to the filter. Filter is stuck in the engine bay sucking hot air b/c there is no place to run tubing. I have a tube connected to the end of the filter running around the radiator down in front of it to catch air once the car gets moving. The 84' C4's have air ducting in the hood which makes it impossible to go over the radiator to do a CAI. The 85+ C4's had this area in the hood open for the tubing. kinda sucks..
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Old May 15, 2012 | 07:32 PM
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Originally Posted by trilkb
nice times, id take em.

do you have a 91-96 rear bumper/tail lights?
No its the old 84-90 style. I do want to change over though.
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Old May 15, 2012 | 07:39 PM
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Originally Posted by v8vette84
The car doesn't seem to like to run out much past 6k. If I run her farther she seems to die off... Not sure why though.. The cam makes power to 6500 or something Lloyd told me. Any idea why I'm loosing power early? I have a full 3" exhaust, full length headers, magnaflow 3" mufflers, X pipe. Could it be the intake?
You bought the heads used, how old are the springs ? It may be time for a new set.
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Old May 15, 2012 | 07:41 PM
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Originally Posted by lt1-xjs
You bought the heads used, how old are the springs ? It may be time for a new set.
I changed the springs to the beehive style I had on when I had the cc503. Had about 3k on them I think.
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Old May 15, 2012 | 07:47 PM
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What cam are you running?

The exhaust is fine, what filter are you running?

The stock TB and Manifold will flow enough air for your setup easy.
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Old May 15, 2012 | 07:52 PM
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LE cam 232/240 .578/.574 110 LSA w/ 1.6rr's. I'm running a spectre filter.
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