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Safe RPM Limit

Discussion in 'Racing' started by ghezzi, Nov 9, 2013.

  1. ghezzi

    ghezzi High Miler GT Contributor

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    I asked this question in the Bellagio section but no luck.
    Bella has 66mm stroke so 9,500RPM has piston speed just under 21m/sec.

    I have open air box with std cleaner, custom exhaust and dual map PC-V.
    Making 76rwhp and still climbing at the rev limiter (8,300 rpm). And 59ft/lbs @ 4325 rpm

    So with a re-flash of the ECU I can bump the limiter up higher, to see where it all goes.

    So to you rev heads in this section, has anybody found the safe working limits of a Cali's stock valve train.
    2007 Bellagio, solid lifters, 40mm throttle bodies, and I presume what is classified as the "small valve" head.
     
  2. kiwi dave

    kiwi dave GT Reference

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    I'd say nobody has found the safe working limits, only the point where she blows! It's the same sort of question on how hard to tighten the thread on a nut and bolt. The answer I've always been given is that until it strips then back it off half a turn. :lol:

    Seriously, it will also depend on the state of the motor, and how long it is held at these higher revs. My thinking is that if you want to extend past the rev limiter for any decent period, have deep pockets and wear a cricket box!
     
  3. ghezzi

    ghezzi High Miler GT Contributor

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    Hey, what's with the cricket bat? Don't you know we bowl underarm over here. :lol:

    Rev limiter was bumped to 8,800rpm, computer came up with warnings when trying to set it higher.
    However, it all became a mute point. When I removed the cat converter from my custom 2-1-2 exhaust system, I gained almost 2 HP, but the point at which peak power was developed dropped from 8,300 to 7,835rpm.

    I can only assume the partial restriction within the system acted like I had a very short secondary pipe.

    Can't ride it, pissin rain again. :cry:
     

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