Mayolives Posted March 27, 2004 Share Posted March 27, 2004 I am ready to order JE forged pistons for my F54 block that will be used for a turbo project. I planned to only bore it .040 over but is there any good reason not to bore it more? I have read posts about of weak stroker motors that have been bored to large and come apart too easy and I don't want the same problem. I am using a P90 head with a schneider cam that has it best power between 3000 and 6500 RPM. Also I want to stay around 8 to 1 compression ratio and will be using a good engine management system. Can anyone provide me with an experienced opinion about how much the F54 can be safely bored? Thanks for your help..........mayolives. Quote Link to comment Share on other sites More sharing options...
BayAreaZT Posted March 28, 2004 Share Posted March 28, 2004 Acording to Honsowetz's book, .080" is the maximum without sonic testing. Quote Link to comment Share on other sites More sharing options...
z-ya Posted March 29, 2004 Share Posted March 29, 2004 I'd bore it 0.80 (2mm) over also. Just make sure that the piston dish is correct so that you end up with the CR you are looking for. Figure that boring 2mm over will give about 0.3:1 more CR. I would think if you were in the ball park of 8:1, you should be OK. Pete Quote Link to comment Share on other sites More sharing options...
Z-Gad Posted March 29, 2004 Share Posted March 29, 2004 Also, make sure the place you are having it bored uses a torque plate to do it. (Simulates having a head bolted to the block) Quote Link to comment Share on other sites More sharing options...
z-ya Posted March 29, 2004 Share Posted March 29, 2004 If you find a shop with an Lseries torque plate great, but if you can't (they are rare), don't sweat it. Just be sure to install and torque the main bearing caps before boring. Thousands of L28s have been bored sucessfully without a torque plate. Pete Quote Link to comment Share on other sites More sharing options...
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