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Weber issues - need opinions
When I rev the engine in the garage I have a pop in my sidepipes after about 2000rpm's. Maybe more on the driver side but the damn thing is so loud I really can't tell. What will cause this popping? I have sprayed carb cleaner around the intake but found no leaks. I think my fuel pressure is right at 2.5 and I think my timing is around 38 degs. This is a 408w.
idle jet 65 idle jet holder 120 primary jet 150 air correcter is 190 f7 tubes 50 exhaust valve and pump 37 venturi's I am running rich around 11 to 12:1 A/F. That is not that far off. If that is the issue, what to change? That ratio is through the whole band. The car runs pretty good already but I really hate to do to much road testing since it is not exactly legally registered yet.:rolleyes: |
What did you determine was at fault?
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I went to f16 tubes and corrected some carb balance issues. I got your PM, just haven't had time to get back to you but the chokes are OEM.
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I assume you have 48 IDAs?
Popping usually means too rich; as opposed to sneezing, which would mean lean. When this occured with my setup, I went lean on the idle jets (55s) and disconnected the distributor vacuum advance. Timed it to 38 deg. max and she's running great. Just a bit fat at idle but the transition is smooth and response immediate. You may want to go to the next smaller size idle jets, 60's maybe. edit: This was on the GT40 w/ 302. |
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