Holley spread bore carb.

Carguy49 · 04-04-2013, 01:34 PM

I have used several of these carbs in the past (20 years ago). They are very tunable and when setup properly can give reasonable fuel mileage on the street. Since they use small primaries and larger secondaries tuning can be somewhat tricky. Shouldn't be a problem for anyone who has spent time tuning a carb for a certain combination. Good luck and should be a very doable project. I have a question, does Holley still build spreadbore carbs??

04-04-2013, 01:34 PM	#9
Carguy49 VIP Member Join Date: Aug 2011 Location: Fife, Washington Posts: 1,979 Likes: 2,475 Liked 2,951 Times in 709 Posts	Re: Holley spread bore carb. I have used several of these carbs in the past (20 years ago). They are very tunable and when setup properly can give reasonable fuel mileage on the street. Since they use small primaries and larger secondaries tuning can be somewhat tricky. Shouldn't be a problem for anyone who has spent time tuning a carb for a certain combination. Good luck and should be a very doable project. I have a question, does Holley still build spreadbore carbs?? __________________ Ron McDowell - Did Race Every day is a Gift - Enjoy with family and friends.