Holley Carb

[79fordblake]

Anybody out there have a 4160 Holley 600cfm carb on their Bronco? If so what spring are you running for your secondaries? Based on info I seen on Holley's website you should run the lightest spring possible without hurting performance(springs are color coded). I just switched my 79 Bronco with a 400 over to a 4 barrel carb/intake setup. The carb came from the factory with a black secondary spring(heaviest one they have). It doesn't bog or pop when floored so the secondaries are not opening early or may not be opening at all. So I think I could try steping up to a lighter spring and see what happens.

 

[Leadsled]

Anybody out there have a 4160 Holley 600cfm carb on their Bronco? If so what spring are you running for your secondaries? Based on info I seen on Holley's website you should run the lightest spring possible without hurting performance(springs are color coded). I just switched my 79 Bronco with a 400 over to a 4 barrel carb/intake setup. The carb came from the factory with a black secondary spring(heaviest one they have). It doesn't bog or pop when floored so the secondaries are not opening early or may not be opening at all. So I think I could try steping up to a lighter spring and see what happens.

I'm not 100% sure but I think the red one is what a lot of people use.