freakshow Posted June 18, 2009 Share Posted June 18, 2009 I have been unable to find a machine shop around me in michigan that has the torque plates to bore my motor. I planned on boring it .040, and running flat top pistons with the n47 head, making the compression around 9.9:1. I am worried that at that compression ratio I will have early engine failure, and poor ring seal if I dont have the work done with torque plates. I know that boring with and without plates has been discussed, but I have searched and have been unable to find conclusive threads. If this is all discussed and I am wasting bandwidth, please point me in the right direction. Also, if the deck plates are that important, would it be possible to rent them from one of the machinist's here? Quote Link to comment Share on other sites More sharing options...
1 fast z Posted June 18, 2009 Share Posted June 18, 2009 Do you need it? No. Will you notice a power difference if done with or without it? No. I have bored a block, and before honing mic the cylinders for roundness, with a tenth bore guage. Then did the same with a torque plate installed to see how far it actually distorts (SP?) the cylinder. You would be suprised on how little it actually does. Then you add the fact of warm water that should be flowing through the block also when honing is being done makes a bit of a difference. The best way is to hone from the bottom with a head installed and 195 deg F water flowing through the block and head. But again, no you will be fine without it. Quote Link to comment Share on other sites More sharing options...
Evan Purple240zt Posted June 18, 2009 Share Posted June 18, 2009 I went much further than that in an L28ET without a torque plate and everything came out great. I agree with ^. Evan Quote Link to comment Share on other sites More sharing options...
freakshow Posted June 19, 2009 Author Share Posted June 19, 2009 Thank you for the response. I am just looking to do this right. I have called 7 or 8 machine shops in my vicinity, and a 5 of them said "whats a l28???". The machine shop in town does good work, but mostly domestic v8's. Quote Link to comment Share on other sites More sharing options...
Evan Purple240zt Posted June 19, 2009 Share Posted June 19, 2009 At the time, my machine shop didn't know what an L28 was as well but they turned out to be the best machine shop I could have asked for. I am still friends with the guys who work there. Evan Quote Link to comment Share on other sites More sharing options...
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