What is a good combo for turning high rpm?

Prine said

I am just going to throw my opinion in here....I have seen 7500 numerous times with a 318.

I didnt see a windage tray in your engine specs...or a HV oil pump.

In your situation, I would decrease the cam duration to the 220-230 @ .50 range....around 262* advertised..over 300* is not good for sustained high RPM.....your cams lift is adequate.

At 100% VE a 318 requires 630 cfm, but for your higher rpm desires

I would get a race prepped Holley 750 MS....


Can you reduce any more weight or is it race spec already?



:read2:

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Yeah it has a hv oil pump and windage tray and scraper and the crank has been knife edged it also has most of the standard road race oil mods. You sure on the cam spec? I had a 280 advert duration cam in it before and it only pulled to about 6k before it fell flat.
I've played quite a bit with different carb setups with my daytona stand alone wideband datalogger. had a speed demon 750 on it and its mid range 4k-5.5k was never as strong as the 4150 hp series holley 650 and the data log shows my a/f at ~12.5 to 1 at 6700rpms.

I guess I should clarify better that my motor will and has rev passed 6700 many times. Ive logged a couple 8k hits as well but it drastically loses power pass ~6700. I believe its the heads holding me back and I'm not real comfortable reving pass 7k with the stock crank even though is forged.

Weight wise I'm running a full 14 point cage and all original steel metal so I could easily shed some weight with a fiberglass front end, doors, bumpers, deck lid and maybe even going to aluminum heads. BUT i like running a real steel body and race fiberglass always looks like garbage up close.