low boost roots supercharger on 10.25-1 ls5 bbc?
#1
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low boost roots supercharger on 10.25-1 ls5 bbc?
I had a customer drop off pickle fork jet boat, wants a low boost roots supercharger as much for looks as performance. He has a 1970 ls5 bbc, pulling motor and tearing down to see whats in it. Appears to be a 1970 ls5, from what I understand it would be 10.25 compression, closed chamber 100 cc head flat top motor. Oval port heads, 360 or 390 hp stock. Either ditch heads for 118cc eq open chambers, install dished blower pistons or freshen and run low boost, havent decided yet. Any input? Of coarse will be running and tuning on dyno
#4
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Im thinking more forged dished blower pistons since most likely has cast flat tops anyways unless i get it apart and somones put forged flat tops in then it will be eq open chamber heads
#6
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Pulling motor right now, will beon stand tore down by end of day, customer knows nothing about nothing other than he want polished supercharger, dual 4bbls, bug catcher etc. Going to be a 6-71 since only a 454, block codes says its a 1970 454 ls5 OR a 402, again will know today what it really is
#7
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years ago i put a 8.71 on a ls5 for a guy,i told him the cast pistons were not going to last long,his responce was then we can build a real engine.within seconds of the engine going in boost it broke the skirts off all 8 pistons.i then proceded to spend a bunch of his money!
#8
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I wont in good conscience boost a cast piston motor, especially one i wont be driving, as of right now still dont know what it even id, has 1971 820 oval ports, i see stock pushrods and a melted black stock rocker armand fulcrum ball
#9
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years ago i put a 8.71 on a ls5 for a guy,i told him the cast pistons were not going to last long,his responce was then we can build a real engine.within seconds of the engine going in boost it broke the skirts off all 8 pistons.i then proceded to spend a bunch of his money!
Last edited by getrdunn; 03-21-2016 at 09:47 AM.