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Tech & Fab
Propane engine builds (tech, questions, advice)
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<blockquote data-quote="machen4x4" data-source="post: 258115" data-attributes="member: 1232"><p>this is what we did to my old truck engine which jd owns now, 22r with got propane kit</p><p>my son in law built the motor for us.</p><p>ricky had his machine shop in hazelgreen al bore the block 30 over, decked the block and head</p><p>balanced the crank, rods and pistons. we went with 10.5 to 1 pistons. probably looking at 11.5 to 1 or even 12 to 1</p><p>compression after the decking of block and head. ported and polishid the head, put bigger valves and springs</p><p>in the head. comp cams built a cam for us that the rpm range was 2,000 to 6,000 on propane.</p><p>put a header on it. motor does pretty good from what i could tell.</p><p></p><p>we took our new motor to ricky a couple weeks ago to build for my sons rig</p><p>it will be the same except more compression and screw in studs for the crank and head, bigger valves and more porting.</p></blockquote><p></p>
[QUOTE="machen4x4, post: 258115, member: 1232"] this is what we did to my old truck engine which jd owns now, 22r with got propane kit my son in law built the motor for us. ricky had his machine shop in hazelgreen al bore the block 30 over, decked the block and head balanced the crank, rods and pistons. we went with 10.5 to 1 pistons. probably looking at 11.5 to 1 or even 12 to 1 compression after the decking of block and head. ported and polishid the head, put bigger valves and springs in the head. comp cams built a cam for us that the rpm range was 2,000 to 6,000 on propane. put a header on it. motor does pretty good from what i could tell. we took our new motor to ricky a couple weeks ago to build for my sons rig it will be the same except more compression and screw in studs for the crank and head, bigger valves and more porting. [/QUOTE]
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