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

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Old Sep 18, 2018 | 03:02 PM
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Default Cam results

I received the dyno sheets from dyno tune after my cam install. car is a 93 LT1 with these mods:
3.54 gears
2800 stall converter
shorty headers
modified stock air box
Resonator delete with X-Pipe
Muffler delete's
first dyno run was done in this trim^^^^^
added:
Custom grind Lunati cam
Lunati Voodoo 1.6 roller rockers
Comp Cams Hi Tech pushrods
second dyno results were with these upgrades^^^
video before cam

Video after cam install:

Obviously Green is with cam/ Red before cam


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Old Sep 18, 2018 | 03:41 PM
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Nice ! More power and torque across the curve! 48 ....call it 50 more rwhp!
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Old Sep 18, 2018 | 03:43 PM
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So you lost basically nothing on the bottom and picked up on top? That's damn good. What were your cam specs again? I wanna say mid 220s @.05? If I had to guess that is around 400 chp?

Last edited by 84 4+3; Sep 18, 2018 at 03:45 PM.
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Old Sep 18, 2018 | 03:59 PM
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We can't see the "low end" since he started the pull at around 3k. Looks like ~340chp to me, if he's running a stick shift.

I want to know what custom grind cam it was.

Last edited by Tom400CFI; Sep 18, 2018 at 04:07 PM.
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Old Sep 18, 2018 | 04:15 PM
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Originally Posted by 84 4+3
so you lost basically nothing on the bottom and picked up on top? That's damn good. What were your cam specs again? I wanna say mid 220s @.05? If i had to guess that is around 400 chp?
223/231 .557/.571 110 lsa
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Old Sep 18, 2018 | 04:17 PM
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Originally Posted by Tom400CFI
We can't see the "low end" since he started the pull at around 3k. Looks like ~340chp to me, if he's running a stick shift.

I want to know what custom grind cam it was.
Automatic. with 2800 stall
cam grind 223/231 .557/.571 110 LSA
being conservative figuring 10% hp loss through drivetrain, should put it at 350BHP +/-

Last edited by BLKMAMBA; Sep 18, 2018 at 04:20 PM.
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Old Sep 18, 2018 | 04:17 PM
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Originally Posted by Tom400CFI
We can't see the "low end" since he started the pull at around 3k. Looks like ~340chp to me, if he's running a stick shift.

I want to know what custom grind cam it was.
It is in auto as he gave stall speed. Very nice results!

Last edited by JimLentz; Sep 18, 2018 at 04:17 PM.
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Old Sep 18, 2018 | 04:41 PM
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Originally Posted by Tom400CFI
We can't see the "low end" since he started the pull at around 3k. Looks like ~340chp to me, if he's running a stick shift.

I want to know what custom grind cam it was.
I spend my life above 3k. My bad actually, thought it started at 2k. There is a big crack in my phone screen though so that's my excuse!
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Old Sep 18, 2018 | 04:50 PM
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Originally Posted by 84 4+3
I spend my life above 3k. My bad actually, thought it started at 2k. There is a big crack in my phone screen though so that's my excuse!
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Old Sep 18, 2018 | 10:45 PM
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Originally Posted by BLKMAMBA
223/231 .557/.571 110 lsa
Curious if you had a tune of some kind? I'm impressed if you can run that much cam + other goodies w/o a new tune.

Thx for sharing.

Oops, I see now in the first sentence it was a Dyno tune also. Congratulations!

Last edited by cardo0; Sep 18, 2018 at 10:48 PM. Reason: Oops.
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Old Sep 18, 2018 | 10:53 PM
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Originally Posted by cardo0
Curious if you had a tune of some kind? I'm impressed if you can run that much cam + other goodies w/o a new tune.

Thx for sharing.

Oops, I see now in the first sentence it was a Dyno tune also. Congratulations!
I actually ran pretty good with cam prior to tune. behaved okay. little groggy at lights but not bad
hitting the track friday
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Old Sep 19, 2018 | 12:55 AM
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Originally Posted by BLKMAMBA
I actually ran pretty good with cam prior to tune. behaved okay. little groggy at lights but not bad
hitting the track friday
If you ever see a ratty/ghetto cruiser pickup towing a 67 bird down there, it's me. Freaking E-town lol.
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Old Sep 19, 2018 | 04:03 AM
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Originally Posted by 84 4+3
If you ever see a ratty/ghetto cruiser pickup towing a 67 bird down there, it's me. Freaking E-town lol.
cool. hopefully we run into each other sometime. I try to get there a lot. I have been working a bunch of ot so not as much as I like. only ran once since tune and had issues. car immediately flopped on face after launch. I have learned these things have common issue with fuel sloshing to rear of tank when below 1/2 tank starving pump. so I hope that was the problem. trying again Friday with full tank. I also changed pump screen.
you can see in this video it flopping.
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Old Sep 19, 2018 | 05:37 AM
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Nice results
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Old Sep 19, 2018 | 09:52 PM
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I'm really impressed you found somebody that will dyno tune these OBD1 dinosaurs. You have the same tach problem I had a while ago. It was running into no man's land after 6k. I had to install an aftermarket tach.

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Old Sep 19, 2018 | 09:54 PM
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Originally Posted by BacknBlack
I'm really impressed you found somebody that will dyno tune these OBD1 dinosaurs. You have the same tach problem I had a while ago. It was running into no man's land after 6k. I had to install an aftermarket tach.

Yea I have plans for one eventually. or maybe a shift light
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Old Sep 19, 2018 | 10:11 PM
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very nice results.
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Old Sep 20, 2018 | 10:22 AM
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Nice gain! Thanks for sharing.
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Old Sep 21, 2018 | 03:10 PM
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Nice results. I’m considering a similar setup. I am about to swap a D44 with 3.45s into my otherwise stone stock 93 auto. Cam will be next.

Do you have to shift manually with the 4L60 to enjoy that extra 750 RPM from stock? You have to dig into a 700R4/4L60 (non-E) to change the shift points with different springs/weights I thought.

Also, while you were in there did you do a water pump and opti? I’m for sure doing a new pump but am inclined to leave a functioning low mileage factory opti alone.
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Old Sep 21, 2018 | 04:40 PM
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Those shorty's are really holding back some power gains. I say go longtubes. Nice numbers and I bet the car is fun.
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