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- Dec 31, 2005
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Same size carb? If so did you compare calibrations?I'm very happy with mine. Better than the Pro Systems I bought.
Same size carb? If so did you compare calibrations?I'm very happy with mine. Better than the Pro Systems I bought.
The Pro System 950 is really only 830cfm. Took a lot of tuning to even get it to idle nicely. I don't know what they do with their calibration. I had to drill 4/ .106 holes in the throttle plates just to get it to idle on the T slots. The Proform was really close out of the box 4/.080 holes idles nice. WOT both are good. I put the emulsion basically like the old school holleys are on both carbs. IFRs down low.Same size carb? If so did you compare calibrations?
Is the ProForm 950 more than 830 cfm? I figured it had the usual 1.375" venturi and 1.75" throttle bore as most of the Holley "950's".The Pro System 950 is really only 830cfm. Took a lot of tuning to even get it to idle nicely. I don't know what they do with their calibration. I had to drill 4/ .106 holes in the throttle plates just to get it to idle on the T slots. The Proform was really close out of the box 4/.080 holes idles nice. WOT both are good. I put the emulsion basically like the old school holleys are on both carbs. IFRs down low.
1.45 x1.75Is the ProForm 950 more than 830 cfm? I figured it had the usual 1.375" venturi and 1.75" throttle bore as most of the Holley "950's".
Thanks. More interested to know what the MAB and Jetting was. There seems to be a trend to too much emulsion and too big a MAB and Jet.The Pro System 950 is really only 830cfm. Took a lot of tuning to even get it to idle nicely. I don't know what they do with their calibration. I had to drill 4/ .106 holes in the throttle plates just to get it to idle on the T slots. The Proform was really close out of the box 4/.080 holes idles nice. WOT both are good. I put the emulsion basically like the old school holleys are on both carbs. IFRs down low.
Thanks. More interested to know what the MAB and Jetting was. There seems to be a trend to too much emulsion and too big a MAB and Jet.
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The Proform IAB .070, IFR .035, MAB .032 PMJ 79, SMJ 86. The Pro Systems IAB .070, IFR, .037, MAB .032, PMJ 78, SMJ 86.llllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllly throttle plates mean less airflow through the T slot. I know Greg fills them in. Can you remember what the IAB and IFR were on the carbs?
I was wrong. The Brawlers do have the IFR's in the lower position. I had my Brawler 750 (67213) apart tonight and remembered this thread:One thing I noticed about both is that the idle feed restrictors are in the top position. That's easy enough to fix though. On the engines I've had, they've always had more stable AFRs when the IFR is in the lower position. I have no idea why though.