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Author Topic:   Fuel pressure system question
droper23
Dirt Freak

Total posts: 233
posted August 08, 2005 07:40 PM  
What is the best way to completely run your fuel system on a modified engine? I currently run a 9lb pump with no regulator or return line. I would like to go to a 13-14 lb pump and put a bypass regulator and return line. What would you recommend as the best and most cost effecient parts to use?

marshalr
Dirt Maniac

Total posts: 148
posted August 09, 2005 10:19 AM  
What kind of pressure does your carburator require ?
Too much pressure is gonna hurt you.I think the 14 psi you are mentioning is very high for a carb on a circle track engine. 8 PSI is plenty for any carb i can think of.
I use the externally adjustable regulator from Jegs or Speedway - i don't remember. I run 7 psi with no problems.
If you have a modified on Alcohol, you may be more concerned with VOLUME of fuel. They have belt drive pumps with a bypass that goes back to the tank.
If cost is a consideration call the guys at speedway or midwest...etc. they probably have a system put together for you with no guesswork or parts you won't need.

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Some People Race For A Living; I Live To Race

49mtmod
Dirt Maniac

Total posts: 127
posted August 10, 2005 07:52 AM  
Assuming you are on alky, I would agree with the previous post that the best way is to go to a belt drive pump and regulator. If you don't want to go with the belt drive system I have run a Pro Cam 14lb pump and a C&S mechanical bypass without problems.

[This message has been edited by 49mtmod (edited August 10, 2005).]

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