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how much rpm !!? help !

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Old 06-06-2008, 08:25 PM
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Default how much rpm !!? help !

i have a forged 347
arp rod bolts and head studs

harland sharp rockers
tsp pushrods
comp r lifters ..
EWP
single belt/pully alternator
25% balancer
and new cam main and rod bearings

how high can i spin it to ?
ima be running alot of nitrous about 300ish and just wondering how hig can i spin it ..
Old 06-06-2008, 08:36 PM
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I'd spin that to 6800k all day and never look back at least thats what I do with mine.......
Old 06-06-2008, 08:43 PM
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6500 easy
7+ if you have big huge man *****
Old 06-06-2008, 08:58 PM
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My rev limiter is at 7200. Shift light at 6800. Stock crank, rods and pistons with Katech rod bolts.
Old 06-07-2008, 09:24 AM
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How cares how far you can spin it, strap it down to a chassis dyno and see where peak power is, then make a determination from there on how far past peak you want to shift it at. 300 past is ideal.
Old 06-07-2008, 09:31 AM
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Originally Posted by JPH
How cares how far you can spin it, strap it down to a chassis dyno and see where peak power is, then make a determination from there on how far past peak you want to shift it at. 300 past is ideal.
True it could fall off on the power whats the point of hanging it out if you don't need to
Old 06-07-2008, 09:39 AM
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You spin it only as high as it needs.
Meaning you shift at a point where you keep the maximum average Hp between shifts, no more no less, all other methods are futile.
Old 06-07-2008, 10:01 AM
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I thought he was asking what is a safe rpm limit to not exceed or go boom.
Old 06-08-2008, 05:41 AM
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yes to both ..

looking at how much rpm i can play with .. but i will be shifting at the best rpm to end up in the powerband for the next gear ... 7+ k too much ?
Old 06-08-2008, 10:10 AM
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Whats the cam look like?
Old 06-08-2008, 11:49 AM
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What size cam do you have?
Old 06-09-2008, 02:35 AM
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ms4
fast 90/90
PRC stage 2.5...

and well everything else too .. i knw the camm willpull up high .,.. just looking for hom much rpm its capable of .. im coming from a high hp rpm rotary .. so going form 9.5k to 6.5k is a lil wierd ... lol




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