Quote:
Originally Posted by grandam1979
I ran a 6X head 455 for years it never went faster shifting at 5200 and 5500 was short shifting and it liked 5800 if you wanted to pull that last .10 out of it. Did you see he’s running a roller cam? His only restriction is the intake he didn’t say much about exhaust so that could be a factor. But again back to the original question what was his combination safe to again 6000 or less.
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I run a .265-.271, .690 lift SR, fully ported 197 HO heads, ported Warrior, 850, 2" headers, open ex.
Far more race oriented than the OPs street ride. many, many runs down the track to prove it.
You can not get enough air into the cylinder with his heads and cam to make power to 6K, not even close. Past 5500 RPM the piston is going down faster than the flame is pushing it.
Its a tq monster, use it and you do not have to worry about needless wear.
If I let my engine go past 6K on the 1-2 shift I am near 7K at the stripe and the car slows down.