Holley 50cc accelerator pump kit
Thread Starter
Burning Brakes
Joined: Feb 2009
Posts: 780
Likes: 1
From: Shelby NC
Holley 50cc accelerator pump kit
Anyone ever used or replaced a 30cc accelerator pump assy for a Holley carb with the bigger 50cc pump? If so how did it work--any problems? Thanks for any experiences with one of those pumps.
Drifting
Joined: Sep 2006
Posts: 1,986
Likes: 21
From: Columbus MN
I put a 50 on my Holley to help fix a lean stumble problem I had when I stomped on the throttle. That plus 2-up squirters fixed the problem. I recommend you buy a set of cams while you're at it to adjust the "speed" and duration of the squirt. 
Thread Starter
Burning Brakes
Joined: Feb 2009
Posts: 780
Likes: 1
From: Shelby NC
That is the problem I seem to have. Mash on it and it goes fine to a point and then seems to lean out and stumbles just a tad. Pump kit I think comes with two cams.
Safety Car
Joined: Oct 2004
Posts: 3,926
Likes: 739
From: Youngstown Ohio
Same here on my 950 Quick Fuel.....used the standard cam that comes with the kit. The larger cam is for the 4500 series (Dominator) carbs.
Team Owner
Joined: Apr 1999
Posts: 21,953
Likes: 1,445
From: Reno Nevada
2024 C3 of the Year Finalist- Modified
Other than that they are a waste of gas, plug fouling, and big blasts of black smoke when ever you floor your car.
IMO - the best setup is the all four barrel squirters set so the slightest movement causes them to dribble. You need to look for the cure not a half *** band aid. You need to look at instant squirt, power valve #, booster type and size, and air bleed system
Le Mans Master
Joined: Oct 2000
Posts: 8,897
Likes: 1,357
From: Santa Ana CA
Race Director
Joined: Apr 2000
Posts: 17,676
Likes: 201
From: Who says "Nothing is impossible" ? I've been doing nothing for years.
I have the 50cc pumps front and back on my 825 Drag Race Demon on my 427ci small block. Put them on while trying to fix a problem that ended up being something else. They work fine but I have 600+HP motor. Even then I probably don't need them
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Thread Starter
Burning Brakes
Joined: Feb 2009
Posts: 780
Likes: 1
From: Shelby NC
Thanks for some insight--don't have a radical engine so it must be something else. Haven't had it on a dyno so I don't know what it looks like on a chart or the air/fuel ratio it's running. Did move up on the fuel nozzle. I'm running a 4175 model spreadbore that is 650 cfm.
Racer
Joined: Jan 2007
Posts: 427
Likes: 1
I had installed a 50 cc kit on a 3310. Changed to a white ramp, green spring on the air valve, 41 squirter with the screw with the drilled hole, a 6.5 power valve, Performer RPM in a 350 c.i. automatic 1963 Acadian SD drag car. I could flat foot that car from idle to full throttle with no stumble. Great set up. Lasted 3 years till I had the urge to go faster...
As a tip, if you start experimenting with jets, a complete jet kit from Mopar is considerably cheaper. Only Dodge part that I had on that Pontiac.
Dano,
As a tip, if you start experimenting with jets, a complete jet kit from Mopar is considerably cheaper. Only Dodge part that I had on that Pontiac.
Dano,
