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#1
09-12-2016, 06:58 AM
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bypass reg/fuel log recommendation
Going to upgrade my fuel delivery this fall, any "affordable" bypass regulator and fuel log recommendations?
i was thinking this for a reg. https://www.summitracing.com/parts/qft-30-900/overview/ but not sure on the log. Thanks! edit: maybe i dont need a "log" just something like this? https://www.summitracing.com/parts/a...6156/overview/
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 1970 gto (4spd) 462 500 hp 11.940@114.21 / 1.843 60'/ 3980 lbs 1964 corvette roadster 1968 corvette roadster 1962 corvette "equal rights, not equal things" if you want to know the future, read "atlas shrugged" I dont race a 4spd because it is easy, I race a 4spd because it is hard. 
Last edited by ry57pont; 09-12-2016 at 07:08 AM. |
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#2
09-12-2016, 09:25 AM
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This one http://www.robbmcperformance.com/pro...ulator_bp.html
Has one inlet, two outlets, and a return.
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1967 Firechicken, 499", Edl heads, 262/266@0.050" duration and 0.627"/0.643 lift SR cam, 3.90 gear, 28" tire, 3550#. 10.01@134.3 mph with a 1.45 60'. Still WAY under the rollbar rule. |
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#3
09-12-2016, 10:27 AM
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ok, so that looks like it would mount to a inner fender, then feed the carb. my question would be is there an advantage to have the fuel recirculate closer to the carb rather than farther away at the fender?
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1970 gto (4spd) 462 500 hp 11.940@114.21 / 1.843 60'/ 3980 lbs 1964 corvette roadster 1968 corvette roadster 1962 corvette "equal rights, not equal things" if you want to know the future, read "atlas shrugged" I dont race a 4spd because it is easy, I race a 4spd because it is hard.
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#4
09-12-2016, 10:57 AM
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My regulator is attached to the fender with about 1.5-2' of line to each inlet on the carb. There shouldn't be any pressure drop between the regulator and carb in that straight section.
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1967 Firechicken, 499", Edl heads, 262/266@0.050" duration and 0.627"/0.643 lift SR cam, 3.90 gear, 28" tire, 3550#. 10.01@134.3 mph with a 1.45 60'. Still WAY under the rollbar rule. |
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#5
09-12-2016, 11:10 AM
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Use the type like the RobbMC.
The Holley type is very restrictive. With the RobbMc type you would not have to have a 'log'. I'd run individual lines from the regulator, one for each bowl. Then the fuel return out another port. They may have a bracket like in this pic, which is style I had. It mounted to the intake bolt. (close to the carb for regulation) regulator/bracket 
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John Wallace - johnta1 Pontiac Power RULES !!! www.wallaceracing.com Winner of Top Class at Pontiac Nationals, 2004 Cordova Winner of Quick 16 At Ames 2004 Pontiac Tripower Nats KRE's MR-1 - 1st 5 second Pontiac block ever! "Every man has a right to his own opinion, but no man has a right to be wrong in his facts." "People demand freedom of speech to make up for the freedom of thought which they avoid." – Socrates |
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#6
09-12-2016, 02:59 PM
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I have run the BG bypass that came with their 220HR pump and others, great regulator. (Better than their carbs lol ). Not sure if you can still get them.
Carb sees full flow of the pump and returns to tank to maintain set pressure. We tested by putting a 3/8 tap in line, opening and closing it at 6psi only saw the gauge flicker for a fraction of a second. Regulator is mounted direct to carb fuel line for quick reaction. Bypass causes no restriction as carb sees fuel first
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Working on going faster (and now staying dry at the same time !!) |
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#7
09-12-2016, 11:26 PM
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Just went thru this on the wife's car in getting it ready for Dragweek. Car has a Mallory 140 pump and I switched it to the Mallory return style regulator, it as dead headed prior. Believe it cost about $108. The whole system redo with this regulator worked flawlessly. She drove the 240 miles today and the Pressure never waive red or changed. The biggest thing to keep in mind is the return line needs to be just as big, if not bigger than the feed line. With the pump on and all the pressure off the regulator, you should have 0 lbs of pressure at the gauge showing no restriction and a clean return. So get ready to run all new lines.
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74 GTO Bracket/Street car and another 74 for the wifey to race with! 70 GTO 400, 4 spd, #'s matching and a little to nice for me to own. Friendship is like peeing your pants..everyone can see it but only you can feel the warmth! |
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