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Coyote Jack 01-30-2013 12:04 PM

Carb conversion ?
I just picked up a 6-71 blower setup that has 2 750 Holley DP's that are setup for E85 with it. There is no such thing as E85 where I live so I will have to convert them back to gas. I know I will need new metering blocks, I will have to boost reference them and probably re-jet the carbs. I may also have to change the power valves, I won't know until I get them apart.

Is there anything else I will need to do?

I know that these were originally gas carbs that were converted to E85. If some of the passages were made bigger in the main body will that make a difference when switching back to gas?


33Willys77 01-30-2013 01:02 PM

Just a suggestion, but to make good carbs and make them work correctly, have someone that knows these things in and out work on them - or send them in to one of the several good carb companies to rework them. Make sure you have good carbs on that blower - a lean condition will cost $$$$. Should really only need blocks, jets, power valves (to suit your engine) and boost reference them. You can get these parts from carb builders too (such as Quick Fuel). Call one of them - they can tell you what you need if you prefer to do it yourself - and possibly buy the parts from them.

Coyote Jack 01-30-2013 06:10 PM

Thanks, that is what I was thinking. I am not to sure about there being any carb guru's around here. Some of the guy's even call me when it comes time to tune their carbs. I wouldn't say I'm a guru, far from it. LOL


vinniekq2 01-30-2013 06:25 PM

Cal l Pat at the carb shop,make a deal with him

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