what is a reasonable reliable rpm for 572 4.5 by 4.5
#1
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JUNIOR BUILDER
Thread Starter
Join Date: Jan 2004
Posts: 77
what is a reasonable reliable rpm for 572 4.5 by 4.5
on a 572 bbc in a boat, what would be the top rpm to turn the motor to keep it reliable? It has 6.535 length rods and 4.5 stroke and 10.2 deck. I really need to add a little nitrous to get a little more power and need to turn 7000 rpm. Will the low rod stroke ratio take its toll at this rpm. This rpm is only obtained while running in a quarter mile and not for any length of time at all. Mainly on a drag run. Motor has ohio crank, and ohio i beam rods with arp 2000 rod bolts. Would it be wise to change the bolts to L-19 rod bolts? Compression is only 10-1.
#3
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RACING JUNKIE
Join Date: Mar 2004
Location: Maine,USA
Posts: 1,204
572 with 6.535 in a 10.200 tall deck? Sounds to me son you got the wrong rods in this engine,because the math don't add up
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#5
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RACING JUNKIE
Join Date: Mar 2004
Location: Maine,USA
Posts: 1,204
It will work,but I'm not to accustomed to putting the pin that far down on the piston,my preference
I just believe it gets a better ring stack and better piston control with the pin hight closer to the top JMHO
Everyone does thing differently,I'd used the 6.7 rod or a custom aluminum
to get a better deck hight is all
I just believe it gets a better ring stack and better piston control with the pin hight closer to the top JMHO
Everyone does thing differently,I'd used the 6.7 rod or a custom aluminum
to get a better deck hight is all
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