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Forum: Pontiac - Street 03-18-2018, 10:46 AM
Replies: 488
Views: 68,490
Posted By JUDGE3
did the above, ran poorly. reverted right back to...

did the above, ran poorly. reverted right back to rear 6.5 power valve, 87 front, 88 rear, .40 squirters f&r ran great. satisfied with that, but why plugging and jetting up made it worse? even...
Forum: Pontiac - Street 03-04-2018, 04:06 PM
Replies: 488
Views: 68,490
Posted By JUDGE3
Cured

Wasn't able to use the spacer (wanted to) due to the shaker scoop height/fitment. already using the blocker kit for the rpm manifold.

went thru everything today and cured the backfire, thank you...
Forum: Pontiac - Street 03-03-2018, 10:29 PM
Replies: 488
Views: 68,490
Posted By JUDGE3
The carb is new out of the box 4150HP Pn #...

The carb is new out of the box 4150HP Pn # 0-80513-1, 1,000cfm, mechanical sec, down leg boosters. (previous carb was a 1050 quickfuel annular boosters and I screwed up shaker 455 tuned it and it was...
Forum: Pontiac - Street 03-03-2018, 06:50 PM
Replies: 488
Views: 68,490
Posted By JUDGE3
thru the carb

Great tips, My new out of the box holley 4150 HP has a backfire thru the carb. I checked timing/increased primary jets/increased squirter/checked float level. backfire remains. also turned adjustment...
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