Thread: Max RPM Limit
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Old 07-19-2009, 06:50 PM
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patrickt patrickt is offline
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Cobra Make, Engine: ERA #732, 428FE (447 CID), TKO600, Solid Flat Tappet Cam, Tons of Aluminum
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Quote:
Originally Posted by Argess View Post
What's the recommended limit for a 428? I would say 5500, but I've heard 6000 is OK with stock rods. Assume ARP rod bolts for this question.

I just did some "rough" calculations based on tire diameter, speed, etc., and it looks like I might have shifted out of 2nd at 6600 rpm. Calcs were rough, and I can't watch the tach when I'm doing this, so shift was probably lower. Sure was screaming though.....

You can calculate your optimum shift points and it will be based largely on your torque curve. Just because your red line might be at, say, 6500 doesn't mean that's the place to shift. Here are my shift points as calculated from a myriad of data.

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