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

What numbers for this engine?

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Old Feb 3, 2006 | 10:54 PM
  #21  
kopbet89c4's Avatar
kopbet89c4
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Joined: Dec 2004
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From: Poop land
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Originally Posted by Insane1
Well, 9 to 1 is a guess. Probably a very high guess. I have made sure that the static timing is 6 with the wire disconnected. According to the laptop it is going into closed loop. The O2 sensor is about a year old but I guess it can be bad. I have got on it a couple times to get scans for the chip tune and today there were 2 dyno pulls on it. Maybe I should run regular in it instead of the good stuff. Probably won't hurt anything at this point. Oh well, I guess I threw away the $1000 I have into this thing. Made a pretty good boat anchor.

I guess I will just drive it around and be done with it.

My next big hurdle will be if it passes smog or not.
Well, say its 8:1, it would make a good forced induction motor. I wouldn't be surprised if you made 800 ft-lbs with a nicely tuned turbo system or SC setup. You are making me crave my import boost fed days...
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Old Feb 4, 2006 | 02:00 AM
  #22  
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TPI
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From: Woodland California
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Originally Posted by Insane1
Yes, I am sure it is a 383. My father-in-law is friends with the machine shop that built it. It had the huge harmonic balancer on it that I had to change so it would fit in the car. Had to put a balance plate between the crank and flywheel to balance the motor. I believe the casting numbers are 882. according to searches on the net they are 76cc chamber heads. 2.02" intake valves ported and polished. Dish pistons.

The cam is a Schneider cam, made locally. Non-roller.
Heads with smaller chambers, and an LT4, or mini ram manifold should make a big difference. The piston manufacturer should be able to tell you the compression ratio with various chamber sizes. My 13cc dish pistons with 5.7 inch rods, and 54cc LT4 heads is rated at 10.8:1 by JE who made the pistons in my 383 LT4. It's not in the car yet, so I dont have numbers
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