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#1
04-01-2013, 07:10 PM
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Electric or mechanical fuel pump?
What kind of HP will a mechanical pump support? Is the rpm limit factor in, say a motor that tops out before 6,000rpm or cubic inches, or a combination?
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#2
04-01-2013, 08:09 PM
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get ahold of RoBBMc Performance
the pump people
__________________
color me gone |
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#3
04-01-2013, 09:10 PM
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Quote:
__________________
 www.bowhanger.com468 poncho powered 66 cutlass 77 Trans http://s1059.beta.photobucket.com/us...rnout.mp4.html |
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#4
04-01-2013, 09:32 PM
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RobbMC has both an 1100 HP and a 550 HP mechanical pump:
http://www.robbmcperformance.com/pro...ntiac1100.html http://www.robbmcperformance.com/pro...ontiac550.html |
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#5
04-01-2013, 09:35 PM
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Have a Robb Mc pump and pick-up and am happy with the result. The biggest stumbling block was the fuel line. Have a 10an all the way up to the Q-Jet.
Running a 461 roller ported E-Heads. |
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#6
04-01-2013, 09:37 PM
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I have the RobbMc 1100 pump. Love it. Rebuildable. Best customer service in the business.
Jim
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65 Catalina sedan. Allen Thomas Performance 495. KRE Heads at 310cfm ported by SD Performance, ProSystems Dominator carb on ported Victor intake, P-Dude custom grind hydraulic roller, MSD ignition, 3.50 Moser/Ford rear. F-Glass front bumper by son Rob, rear by the old man and joint effort for trunk lid. 3950# w/driver. Best of 9.5761/139 on 175 shot, 6.01 /114 in 1/8. |
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#7
04-02-2013, 04:21 PM
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I agree with all of the above. Rob said the 1100 pump is good until at least the low 10's with the proper feed line.
__________________
68 GTO,3860# Stock Original 400/M-20 Muncie,3.55’s 13.86 @ 100 Old combo: 462 10.75 CR,,SD 330CFM Round Port E's,Old Faithful cam,Jim Hand Continental,3.42's. 1968 Pontiac GTO : 11.114 @ 120.130 MPH New combo: 517 MR-1,10.8 CR,SD 350CFM E's,QFT 950/Northwind,246/252 HR,9.5” 4000 stall,3.42's 636HP/654TQ 1.452 10.603 @ 125.09 http://www.dragtimes.com/Pontiac-GTO...lip-31594.html |
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#8
04-03-2013, 01:58 AM
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Being that this was posted in the street section, the following probably doesn't matter, but I'll still throw it out for discussion.
Horsepower and final E.T. are not the only issues. The force of the launch has to be considered on whether the pump will perform properly. Mechanical pumps suck fuel the length of the car, and are limited on how much suction they can generate. Not only that, but fuel can flash into vapor when a vacuum is introduced. Except for acceleration, the big mechanical pump easily supply more fuel than the engine can consume. I'm not a math wizard so I can't give the actual pressure needed to overcome a 1+G launch, but I don't think suction is going to pull fuel until things settle back down. If the fuel bowls aren't drained during this time, the engine will still perform as expected. Electric fuel pumps push fuel from the tank forward, and are usually set to 12+ pounds of pressure that is only reduced just before the carburetor - and they will supply fuel at all times.
__________________
Mick Batson 1967 original owner Tyro Blue/black top 4-speed HO GTO with all the original parts stored safely away -- 1965 Catalina Safari Wagon. |
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#9
04-03-2013, 05:37 AM
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Electrical problems won't stop a mechanical pump from working. Sometimes simpler is better.
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