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| Fuel bowl draining. | Login/Join |
DRR Pro |
So getting the car ready for the year finishing up a few thinks. Noticed my rear fuel bowl draining as soon as the motor is shut off. It is draining into the intake Alky carb thats is 12 years old Pro system sv-1. Metering gaskets look fine. What else would cause this. Think maybe a crack or something in the metering block itself...Planning on sending it in for a over haul at this point. Its been a great carb.. I am really scared to touch it honestly the car has been deadly. "Just Shut Up and Race" Brian Martin Martin Racing 5.50 126 | ||
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| DRR Elite |
Have you gone through the carb as part of your off season maintenance? Every off season my carbs get stripped, cleaned, all passages blown out, N&S removed and all gaskets replaced. I also verify the floats are good and check their set. If you haven’t done this, start there. | |||
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| DRR Pro |
opps post in wrong section. Ed have not done this season.Went thru it before last season new floats needle seat ect. "Just Shut Up and Race" Brian Martin Martin Racing 5.50 126 | |||
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| DRR Pro |
If it’s dumping fuel in while running floats…I change alky floats 2 to 3 times a year | |||
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| DRR Pro |
Its not dumping it draining when you kill the motor. You can watch the float draining the sight glass "Just Shut Up and Race" Brian Martin Martin Racing 5.50 126 | |||
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DRR Pro |
I'd pull the carb off, clean the outside really good, and put it on a stand so you can watch the underside of it. Fill the float bowls with fuel and watch....if it's draining that fast, you'll find it quick... Mark Goulette Owner/Driver of the Livin' The Dream Racing dragster www.livinthedreamracing.com "Speed kills but it's better than going slow!" Authorized Amsoil Retailer | |||
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| DRR S/Pro |
Does it have a rear power valve? | |||
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| DRR Pro |
No "Just Shut Up and Race" Brian Martin Martin Racing 5.50 126 | |||
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DRR Sportsman |
if it has a rear PV plug in the metering block, check to see if it's tight and the gasket is good. | |||
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DRR Trophy |
Accelerator pump leaking? Mine was leaking on the front to end the season. The bowl would empty in between nights of racing. They are cheap and easy to replace. | |||
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| DRR S/Pro |
As stated above check the PV plug gasket and also the metering block gasket. | |||
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| DRR Top Comp |
Take the carb off but leave the fuel line connected (assuming it's a hose and not hardline) Fill the bowl and look under the carb and see where it's leaking from. Why keep guessing? . Dave F J B | |||
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| DRR Trophy |
Possible rear bowl vent plugged? | |||
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DRR Pro |
Many years ago I had a pair of 3-circuit Dominators that leaked through the intermediate tubes profusely, some guy I think named Marvin at Holley sent me 4 new metering blocks, problem solved, to this day the best performing carburetors as a single or a pair I have ever seen. "Despite the high cost of living, it remains popular." Dave Cook N375 | |||
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DRR Pro |
X2. It will also drip at idle making the idle sloppy. Matt Ward | |||
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| DRR Sportsman |
Float is set too high, or oring on needle and seat is hard | |||
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DRR Top Comp |
Did you get issue resolved? https://postimg.cc/gallery/np3zpruo/ "Dunning-Kruger Effect" -a type of Cognitive bias where people with little expertise or ability assume they have superior expertise or ability. This overestimation occurs as a result of the fact that they do not have enough knowledge to know they don't have enough knowledge. Before you argue with someone ask yourself, "Is this person mentally mature enough to grasp the concept of a different perspective?" If not there is no point to argue. 4X NE2 CHAMPION. 2020 TDRA NE2 Champion | |||
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| DRR Pro |
Power block off was good gasket was good. Talked to Patrick thinking corrosion or something else with the metering block. Carb is 12 years old and its been a good piece sent it in for updates and rebuild. "Just Shut Up and Race" Brian Martin Martin Racing 5.50 126 | |||
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| DRR Elite |
Good choice, he’ll make it right | |||
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| DRR S/Pro |
I missed the alky fuel, if the metering blocks were machine after anodizing, meaning bare metal internal passages, it's like one corroded into another causing the leak. He is probably using billet blocks now and they should be machine first and then anodized. I ran alky for a while and it will do a number on areas with flowing fuel vs just sitting in a fuel tank. Anodizing is not a cure all also but it will increase the life span. Top end lube can also help. | |||
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