High compression

robocop

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What vehicle(s) do you drive?
1987 Cutlass Supreme 2 door with 500 Cad/Turbo 40
My 87 Cutlass is taking a long rest in the backyard. The low compression 500 saw far side of 5000 rpm too many times at 35psi oil pressure. Rod knock. I have another short block with 10:1 MTS pistons to match 76cc heads. What recommendations do you all have to run it on pump 93? I figure I'll take it apart again and zero deck it; run a .030" Cometic head gasket. For a cam how about a 235/240 with .500" lift and a 116LSA? I'll block the exhaust crossover. What else should I do?
 

5one9

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What vehicle(s) do you drive?
2007 Magnum SRT8, 1957 F100
116LSA is pretty wide. What are you going to do with the car? What intake?
Got any pics of the car?
 

robocop

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What vehicle(s) do you drive?
1987 Cutlass Supreme 2 door with 500 Cad/Turbo 40
I've always read wide LSAs inhibit pinging. The engine had a MTS VT10 cam and it pinged so bad it couldn't be driven except gingerly with avgas.
My intention is hot street. Only 1/8th mile track is 50 miles away and 1/4 mile is 90 miles. It has 2.73 gears right now; think I'll install 3.23s or 3.42s and headers. Car has to be able to drive to track. I don't have a truck and a trailer.
Intake is Edelbrock 2115. Performer. Rochester carb. HEI received. Turbo 400
GN rear, Auburn posi.
 

Caddylackn

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What else should I do?
If you unshroud the valves and clean up and polish the chambers for hot spots. That should get you 2 - 4 cc or more volume in the chamber so and help with pinging.
What is the deck height now? That might have been the some of the reason for pinging. The zero deck will help considerably.
Also check the balancer to 0 TDC at #1 with the heads off and true the pointer to 0 TDC.
Get a newer digital timing gun and check the advance curve of the distributor.
Get an adjustable vacuum advance and an advance limiter. Make sure your total timing is where you want it, at the rpm you want it.
 
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