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Crazy Dart
PostPosted: Fri Dec 19, 2008 6:45 pm 
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Will the stock long rods hold up with a 12.5:1 compression ratio? I am building a Drag Motor and we are calculating a 12.5:1 compression ratio. I am planning on turning the motor about 5,600 RPM.

There is a lot of knowledge on this board, please help.

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slantzilla
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PostPosted: Fri Dec 19, 2008 7:27 pm 
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They should hold up until you get over 6500 rpm. After that the small ends tend to separate at times. :shock:

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Crazy Dart
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PostPosted: Sat Dec 20, 2008 7:34 am 
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Thank you Sir...

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Doctor Dodge
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PostPosted: Sat Dec 20, 2008 8:48 am 
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A well selected and reconditioned set of 198 con rods will hold-up to 12 - 1 compression, I have used them in 300 HP Slants with-out a problem.
DD
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slantzilla
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PostPosted: Sat Dec 20, 2008 10:49 am 
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A well selected and reconditioned set of 198 con rods will hold-up to 12 - 1 compression, I have used them in 300 HP Slants with-out a problem.
DD
I also have a set in my junk. They have held up well to as much as 180 hp worth of hose and 6500 rpm. :D


Can't say the same for my KB pistons. :shock: :lol: :lol: :lol: :lol:

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