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Hi, first post.
I am curious what could be the highest RPM you get from a stock block with stock or aftermarket pistons with a stock oiling system, modified head, modified valve train(gears, cam, pushrods, stamped 1.75 rockers, 2-coil springs, and lightened valves)?
What about a hi volume/flow oil pump?
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I believe Mike K turns 9000 RPM w/aluminum rods ,aftermarket head & posibly a stock style oil system, but dont qoute me on him having a stock oil pump.
I have turned up to 7500 rpm w/stock rods, heavy TRW pistons & standard volume oil pump,Crane gold aluminum roller rockers 1.70
My rods are side grinded/polished,then shot peened @ ARP rod bolts installed.
Cloyes gear timing set. Chrome Moly push rods.
Standard weight valves,dual springs,solid flat tappet camshaft.
Nothing full race @ all.
MBHD
Normal RPM was 6000-6500.
12 port SDS EFI 
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I saw one last week at the Sturgis, SD Drag Strip running alcohol and he was shifting at 9335 RPM and it sounded good.
There was a 292 in a pickup on pump gas doing 8,800 RPM and that thing really put a bunch on the trailers for home before he was done.
Normbc9
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Beater-
That must have been Lee Lasey! He said... if we only knew...the head had to work with the cam...no doubt the PES lumps..ya think?
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A 250 (stroke: 3.53", rod: 5.7") at 7,500 RPM is only 119,000 f/s/s piston acceleration.
9,000 is far worse than it appears at first impression, because the inertial load varies almost as the square of the RPM. 9,000 is 171,000 s/s/s, 44% higher stress.
A 292 (4.12", 6.76") at 8,800 is even worse at 190,000.
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I guess I'm aiming low then I thought 5500 was high.
What if you have the stamped rockers and hydraulic lifters made by Comp Cams?
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If you are running a stock damper, 5500 is high.
Need to know what parts & mods you are going to give & do to your engine.
To give you an estimate on how high you should be able to turn.
Details details.
MBHD
12 port SDS EFI
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stock block with stock or aftermarket pistons with a stock oiling system, modified head(ported), modified valve train(gears, cam, push rods, stamped 1.75 rockers, 2-coil springs, and lightened valves -basically ALL Comp Cam K61-246-4, except getting a custom grind on the cam to provide more vacuum for the power brakes)
I guess I could buy the Fluidampr 720101 harmonic balancer.
I'm going to use the car in road racing.
Last edited by Justin E; 08/13/11 02:48 AM.
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If you use the stock connecting rods I highly recommend ARP rod bolts.
I have failed stock rod bolts with a torque wrench during assembly, also on two occasions threw rods out the side of 250s, presumably rod bolt failures. I don't know how many rpms but I doubt it was much over 5000.
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I saw one last week at the Sturgis, SD Drag Strip running alcohol and he was shifting at 9335 RPM... Wow, that guy gets my vote for "driver of the year" if he can control his shift speed to the nearest 5 RPM. I consider myself doing good if I can hit high without tossing the valves. From the sound of your valve train pieces you should be good well into the 6000-plus range; just make sure your valve spring seat pressure (especially the exhausts) is within the specifications of the camshaft maker. I don't know about Chevy rotating assembly robustness.
FORD 300 inline six - THE BEST KEPT SECRET IN DRAG RACING!
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ATI Super Dampner .....Please
216.158 MPH 12-Port 302 GMC on 70% 171.0 MPH 302 stock head on gasoline 7 years later
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Preacher-nochoir,
He told me it was a head he had prepped by a shop in Indiana and yes it was lump ports installed too. That thing even sounded smooth too. But it hauled fanny. His burn-outs were John Force style impressive.
Normbc9
Last edited by Norm Silver; 08/18/11 05:42 PM.
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The CD is too short for a slant piston.
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who's john force? I did not find him in the Inliner directory.
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who's john force? I did not find him in the Inliner directory. You ARE kidding - right? Yeah, of course you are.  Click HERE regards,Rod
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He certainly seems to be an up and comer dont he?
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