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Author Topic:   fuel
richard mcright
Member
posted March 18, 2003 01:36 AM
seem to running low on fuel on long end of track any help. running eldebrock fuel pump 14 psi style. 383 methenol. thuoght about jet extensions anybody useing this. thank you for your time


sdhnc29
Member
posted March 18, 2003 10:58 PM
The most common problem that I have seen with lack of fuel at the end of the straight on alky engines , is caused from the float's not being adjusted correctly . This is normally a result of too much idle fuel pressure . Many people without a bypass system will have 9-12psi at an idle , causing the carb to flood . As a result , they will lower the float level . Once the float level has been lowered , this will result in not enough float drop . So by the end of the straight , the car is running on fume's , and when you pick the throttle up all you have is a pump shot and then a stumble or bog . If you don't have a bypass system , then I'd invest in one . At the very least , a throttle bypass .

Provided you do not have the above mentioned problem , then it would be extremely rare to have a fuel supply problem unless you have a different problem . Such as , too small of a suction line , paper element fuel filter on the suction side of the pump , pick-up in the tank s@ucking bottom , bad valve in the pump , and so on and so forth .

Personally , I've never had the need for jet extensions .

Hope this helps ,
Steve

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Hendren Racing Engines
Rutherfordton , NC
(828)286-0780


richard mcright
Member
posted March 19, 2003 03:25 AM
thanks for your input we do run a regulator , we are running around 6.5 psi at idle. we did run differnt carbs 2 of them did not do this just this particular carb, problem is it runs better on engine dynoed with it and it out performed but we have had this bog at end of straight of way.we are looking at the fuel pump rod make sure it has not worn down. since we are running a roller cam.so what kind of floats would you recommend in a carb. we have run both find the nytryl to be better.


Monster
Member
posted March 19, 2003 04:41 PM
Might look at your regulator, if regulator is on pump side of carb(the pass-thru kind). See if the orifice is big enough to allow proper volume of fuel during times of high flow requirements.


sdhnc29
Member
posted March 19, 2003 05:16 PM
Personally , I like the brass float . Be sure that your fuel pump rod has a bronze tip on the side that contact's the cam . If it does not , then it will wear the fuel pump lobe on the cam , and or , destroy the pump rod .

Steve

------------------
Hendren Racing Engines
Rutherfordton , NC
(828)286-0780


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