Guest strokerZ Posted April 7, 2005 Share Posted April 7, 2005 Just heard back from the machine shop that sonic tested my spare stock F54 block prior to machining for my 3.0litre turbo stroker project. The block is to replace my last 3.0litre block that sustained damage to one of the cylinders. I was told that when they sonic tested the new block that the two outer cylinders would have 2 "spots" where the walls will only be 100 thou once the material was removed. They are said to be "non-thrust" areas of the cylinder walls. I am installing 88mm JE forged pistons and will run somewhere around 18-20psi at the track. I know that there are a number of turbo 3.0litre motors out there that run high boost without any problem. Is there any reason I should be concerned as a result of this information. Hope that I am explaining this correctly. Quote Link to comment Share on other sites More sharing options...
Z-Gad Posted April 8, 2005 Share Posted April 8, 2005 You may want to try another block... I had gone through sonic testing of 3 blocks prior to finding one marginal enough for an 89mm overbore on my previous stroker motor. I had another block crack between the #5 and #6 water passage on a block I did not sonic test (not a thrust surface either), so I do not know what the wall thickness was at the point of failure... Quote Link to comment Share on other sites More sharing options...
RB26powered74zcar Posted April 8, 2005 Share Posted April 8, 2005 I had two F54 blocks crack between the cyl with a 89mm bore..... I did not do the sonic testing. I was still wet behind the ears at that point in my Z car marrige.... lol Quote Link to comment Share on other sites More sharing options...
COZY Z COLE Posted April 8, 2005 Share Posted April 8, 2005 http://zhome.com/rnt/L28conversion/3031FAQ.html http://www.geocities.com/row4navy/engine.html Good info.... LARRY Quote Link to comment Share on other sites More sharing options...
Deep Posted April 8, 2005 Share Posted April 8, 2005 Does anyone make a block gaurd (block saver) for the L series engines? Maybe machining one would help you stroker guys out. Quote Link to comment Share on other sites More sharing options...
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