Posted by The tractor vet on February 18, 2013 at 16:56:32 from (75.19.115.148):
In Reply to: D Slater-LPG head posted by CNKS on February 18, 2013 at 16:35:36:
With a 197 PSi compression your darn tooten and even with a 22 degree plate look at the problems we have with a 706 and fresh we are only talking around 165 to 170 on cranking pressure and 18 degrees. And even the 93 octane may not be enough . as for hearing the PING on a tractor engine when ya hear it HUSTON YOU HAVE A PROBLEM . Now i have never run a compression test on Vernon's S/MTA as it has the high alt. 450 pistons in it with a 450 gas head and a 450 cam and manifold i can however tell ya that she will make five to six more ponys then the 706 will on the same dyno and hold it well . Like all our gasser they are fed 93 and as long as the fuel supplyer brings us the 93 we have not problems . BUT let them mess up and i am replacing pistons . Would i have this problem with a FORGED piston ????? don't know as all ya can get is CAST pistons and they will not take the heat.
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