Hi,
Looking for some advice. I have just changed over from my Holley 600cfm to 4 x 44 IDF's. The Jetting on the carbs I believe was initially set for a VW. (seems these carbs are a popular upgrade on VW Beetles etc). In running a 300hp Ford windsor 302. Any suggestions on a jetting combination that would be a good start. I believe I have 50 idle jets and 135 main jets.
I'm getting a little exhaust backfire as she warms up and then some when I'm a little off the throttle. No exhaust backfires when under full acceleration.
No exhaust or vacuum leaks that I can see and the carbs all seems balanced with an air flow meter on tick over.
Think I may be under fueling with my current jets and not getting a good combustion burn leaving un-burnt fuel ?
I'm also running with no air filters with the velocity stacks fully open so no air restriction at all.
Thanks.
Nick.
Looking for some advice. I have just changed over from my Holley 600cfm to 4 x 44 IDF's. The Jetting on the carbs I believe was initially set for a VW. (seems these carbs are a popular upgrade on VW Beetles etc). In running a 300hp Ford windsor 302. Any suggestions on a jetting combination that would be a good start. I believe I have 50 idle jets and 135 main jets.
I'm getting a little exhaust backfire as she warms up and then some when I'm a little off the throttle. No exhaust backfires when under full acceleration.
No exhaust or vacuum leaks that I can see and the carbs all seems balanced with an air flow meter on tick over.
Think I may be under fueling with my current jets and not getting a good combustion burn leaving un-burnt fuel ?
I'm also running with no air filters with the velocity stacks fully open so no air restriction at all.
Thanks.
Nick.