Quote:
Originally Posted by 911 SLANT
Ian, I have the 2.8 Fancy holes Titanium engine cross bar. My 46mm PMOs float bowels do not over fill. I also run Rebel Racing stiff motor and trans mounts. I'll keep this thread in mind.
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We think it’s closely tied to HP and RPM’s. Ian’s ButtDyno (c) has this 3.2SS at 255-260 and it is purposely driven well over 6000 and hits 7200 frequently.
Quote:
Originally Posted by Cory M
It would be interesting to put accelerometers on the carbs and test both bars to see what frequency causes the issues and the rpm range it is being excited.
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I told Ian that I thought the stock crossbar was a concert pitch 440’hz F#. He didn’t seem to find that amusing.
I’m just glad to be back to where we started. Now we’re back to experimenting with the fourth transition holes, drilling jets and emulsion tubes… and all the normal stuff that all the cool kids are doing.
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78’ SC 911 Targa - 3.2SS, PMO 46, M&K 2/2 1 5/8” HEADERS, 123 DIST, PORTERFIELD R4-S PADS, KR75 CAMS, REBEL RACING BUSHINGS, KONI CLASSICS
Last edited by snbush67; 12-12-2022 at 05:45 PM..
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