Racing Fuel Systems

Re: Holley 700 DP

2022-02-21T17:35:17+01:00

I can tell you I had a Holley 4777 650 double pumper carburetor that I took out the straight leg boosters and installed down leg stepped boosters and it made quite a difference in throttle response and a stronger signal when hitting a quick half to wide open throttle and was a lot crisper and smooth when going from the transition circuit the mains flowing through the boosters. That was my experience doing that. I used a .140 sized inside dimension of the booster tube going through it.

Statistics: Posted by eric76 — Mon Feb 21, 2022 5:35 pm

Re: Holley 700 DP

2022-02-19T04:10:18+01:00

Thank you for your input JMark .

Statistics: Posted by 6.50camaro — Sat Feb 19, 2022 4:10 am

Re: Holley 700 DP

2022-02-05T00:45:27+01:00

There is a gain thru the booster, and a little outside as the booster is machined on the outside as well. I did a 650 body with .450 DL's for someone in Australia, they picked up 15HP on the dyno.

Statistics: Posted by jmarkaudio — Sat Feb 05, 2022 12:45 am

Re: Holley 700 DP

2022-01-23T05:48:11+01:00

My understanding is that there is little to no flow difference [ ie, air flow past the booster ] with either type, but the DL booster is more sensitive & flows fuel at a lower pressure.

Statistics: Posted by GTO Geoff — Sun Jan 23, 2022 5:48 am

Re: Holley 700 DP

2022-01-22T10:15:18+01:00

Statistics: Posted by rgalajda — Sat Jan 22, 2022 10:15 am

Re: Holley 700 DP

2022-01-19T18:25:47+01:00

Statistics: Posted by rgalajda — Wed Jan 19, 2022 6:25 pm

Re: Holley 700 DP

2022-01-19T17:00:03+01:00

Statistics: Posted by jmarkaudio — Wed Jan 19, 2022 5:00 pm

Re: Holley 700 DP

2022-01-19T12:00:10+01:00

Statistics: Posted by rgalajda — Wed Jan 19, 2022 12:00 pm

Re: Holley 700 DP

2022-01-18T19:10:48+01:00

Statistics: Posted by jmarkaudio — Tue Jan 18, 2022 7:10 pm

Holley 700 DP

2021-12-11T13:51:40+01:00

Statistics: Posted by 6.50camaro — Sat Dec 11, 2021 1:51 pm