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

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Old Jan 1, 2023 | 07:42 AM
  #1  
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Anyone installed the Procharger kit on a 91 Auto?

​​​​​​

What else need to be replaced/upgraded? and is it worth it?
Appreciate the feedback.
TIA

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Old Jan 1, 2023 | 04:10 PM
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Without a doubt. forced induction can create fantastic HP results.

Worth it. Pro charger $5,1xx plus.. mandatory larger lbs injectors. Depending on HP.. mandatory PROM tuning "per" upgraded power- add- ons.
GM specifically tuned the 85- 91 TPI system incredible ratio to power. Taking on big block power. At specifically designed lower tuned Air flow.
end results. RPM.
Full benefit requires upgrading the intake/ heads/cam.
exhaust to handle the PC high volume forced air.
Price to performance wise. Calculations say no.
*** PC 5,1xx. More than. NA similar upgrades.

This does not factor- in.
Fuel pump upgrade.
700R4/ Dana 36 handling this HP/ TQ.
More upgrading/ modifying. price expences.

If you already owned let's say SSEi. porting, exhaust injectors. Tune.
Then again. NO need for a pro charger



Last edited by THE 383 admiral; Jan 1, 2023 at 06:34 PM.
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Old Jan 2, 2023 | 03:43 PM
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I did it about a year ago and I also recommend rebuilding the engine.
I had to change the forged pistons because one piston blow.

I had 330hp before the supercharger and 403hp after with 6 psi boost pressure


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Old Jan 2, 2023 | 10:32 PM
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Originally Posted by MrBigDee
I did it about a year ago and I also recommend rebuilding the engine.
I had to change the forged pistons because one piston blow.

I had 330hp before the supercharger and 403hp after with 6 psi boost pressure

looks great!! 👍🏻
did you have to upgrade other stuff?
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Old Jan 3, 2023 | 02:49 PM
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Yes, I have built quite a lot of new parts.

Before the supercharger I had done:
-exhaust pipe system
-headers
-#113 Corvette aluminum heads
-Comcam mild cam
-1.6 rockers
-ported intake, plenum and Runners
-33 lbs EV14 Bosch injectors
-custom chip
-wideband gauge
-dyno 330hp

When installing the supercharger, I did
-Aquamist Meth / water injection
-TIAL dump with supercharger spring
-custom chip
-boost gauge
-FP gauge
-catch can that the crankcase is ventilated better, because the engine was not originally designed to work with boost
-dyno 403hp

Then a piece came off the 3rd cylinder piston....after which I installed the forged pistons

Now I'm installing a Meqasquirt engine controller that understands boost and it's from this century, after that a new dyno
Here is a short video about rebuilding


Last edited by MrBigDee; Jan 5, 2023 at 02:54 PM.
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Old Jan 3, 2023 | 09:27 PM
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Originally Posted by MrBigDee
Yes, I have built quite a lot of new parts.

Before the supercharger I had done:
-exhaust pipe system
-headers
-#113 Corvette aluminum heads
-1.6 rockers
-ported intake, plenum and Runners
-33 lbs EV14 Bosch injectors
-custom chip
-wideband gauge
-dyno 330hp

When installing the supercharger, I did
-Aquamist Meth / water injection
-TIAL dump with supercharger spring
-custom chip
-boost gauge
-FP gauge
-catch can that the crankcase is ventilated better, because the engine was not originally designed to work with boost
-dyno 403hp

Then a piece came off the 3rd cylinder piston....after which I installed the forged pistons

Now I'm installing a Meqasquirt engine controller that understands boost and it's from this century, after that a new dyno
Here is a short video about rebuilding

https://www.youtube.com/watch?v=9JSaS__QCNE
Wow nice work 👍🏻
Thx.
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