whats the highest rpm you can go with cast pistons

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gmhater

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I have a stock 360 with a mild cam just wondering whats the highest rpm you guys have gone with stock pistons? Ive done 5800 in short bursts in a drag race, not sustained. Is it possible to do over 6000 without hurting the motor in a drag style situation? Just wondering what you guys think, i have a cam i could put in that would make power up to 6500 but dont know if would be worth it.
 
10,000 RPM...jk.lol

I wouldnt want to use a non hyperutectic cast piston much over 65-6800 rpm, they are heavy and not as strong as they need to be for rpm/high hp

i say go for it though, u should be ok.
 
I spent a summer taking mine to 7000+ in a 318, bumped a 7400 chip a couple of times. It was mostly an experiment to see what I could get away with, it's still in one piece and I look forward to running it again.
 
With a stock 360....you'll float the valves way before having to worry about the pistons. Just my $0.02.
 
flyfish said:
With a stock 360....you'll float the valves way before having to worry about the pistons. Just my $0.02.
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+1



I've pushed mine to 5500-6000 although there was really not enough cam. But I did it to see if it would last.. It lived..then some crap somehow got into the engine and destroyed a rod bearing....:dontknow:
 
Toluene56 said:
+1



I've pushed mine to 5500-6000 although there was really not enough cam. But I did it to see if it would last.. It lived..then some crap somehow got into the engine and destroyed a rod bearing....:dontknow:
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Probably a hard piece of old seal got by the pick up screen, common as well as bearing corrosion from moiture-un frequent oil changes for 10-30yr old engines, contaminated oil, oxidization etc, the bearings just go away..they look spotty and are pitted sometimes.

If he is camming it for 6500, it will go 6500
 
1wild&crazyguy said:
Probably a hard piece of old seal got by the pick up screen, common as well as bearing corrosion from moiture-un frequent oil changes for 10-30yr old engines, contaminated oil, oxidization etc, the bearings just go away..they look spotty and are pitted sometimes.

If he is camming it for 6500, it will go 6500
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yep.. the bearing going had nothing to do with it turning 5800 + RPM. I had done it plenty of times before.. Just happened to let go at the arm drop drags last year right after a run.

Chit happens.
 
The rods will give up before you have any piston issues. The stock wimpy 3/8 bolts will allow the rod to distort and spin a rod bearing
 
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