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Fuel surge tanks systems??

Old 06-18-09, 09:37 AM
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Exclamation Fuel surge tanks systems??

Ok so im currently running 2 walbro inline pumps and a 15 gal fuel cell and im having some fuel slosh issues. im looking to add in a surge tank and have a few questions.

now i need equivalent amount of fuel that the two walbro pumps put out as im making more power than one can support.

now my biggest question is once i add a surge tank to the system will the two pumps (one lift and one post tank) still flow the same volume to the rails as before or will i need to add a bigger lift pump and then use the two walbros post tank to get the same results?

any of you high hp guys on here have any experience with trying some different setups on track
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Old 06-18-09, 10:57 AM
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Low pressure/high volume lift pump, then your two walbros. The surge tank shouldn't be pressurized, the fuel return should go back into the surge tank and an overflow lead back to the main tank is needed as well.

This is from what I've observed and experienced.

Will be making and in tank surge tank on my FD.

Example

http://toyotaperformance.com/surge_tank.htm
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Old 06-18-09, 11:17 AM
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well then what are my options i should be looking at for a lift pump being high volume low pressure? would carburetor type fuel pumps work?
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Old 06-18-09, 11:49 AM
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Originally Posted by rob81gsl View Post
well then what are my options i should be looking at for a lift pump being high volume low pressure? would carburetor type fuel pumps work?
Yes, that is the perfect example of high volume, low pressure.

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Old 06-18-09, 01:02 PM
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Old 06-18-09, 02:18 PM
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is there any reason you cant run a high pressure pump as lift? i know ive seen guys do it before. i guess im not sure on the reasoning why only low pressure?

ive been looking at getting an aeromotive a1000 to replace my walbros was kinda hoping there werent any reasons i couldnt just use one or both of my walbros i already have as lift pumps to save the cost of buying another pump to lift with
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Old 06-18-09, 02:34 PM
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Originally Posted by rob81gsl View Post
is there any reason you cant run a high pressure pump as lift? i know ive seen guys do it before. i guess im not sure on the reasoning why only low pressure?

ive been looking at getting an aeromotive a1000 to replace my walbros was kinda hoping there werent any reasons i couldnt just use one or both of my walbros i already have as lift pumps to save the cost of buying another pump to lift with
High pressure pumps generally move less volume for a given current draw. So you will be wasting its pressure capacity and flowing less volume than a similar low pressure pump with the same current draw....

Basically it has to do with what you have right now.

If you still have your stock fuel pump in the tank its worth it because you would use this to fill the surge tank, otherwise if you have to build a custom system you might as well go with a cheaper, higher volume carburated pump. You can definitely use one of the walbros if you already have them.

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Old 06-19-09, 11:29 AM
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Fuel Safe actually runs a Bosch 044 pump in their in-cell surge tanks... are you thinking of running an external tank instead?
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Old 06-19-09, 01:08 PM
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ya im gonna do a larger external tank. i need the added capacity as well.
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Old 06-21-09, 05:38 PM
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i have a new surge tank i am selling for $80 it has 2x AN -6 (one for fuel feed,one for fuel dump back to tank)Fitting,1x AN -8 (Fuel regulator return)fitting and 1x AN -10(Main Fuel feed to fuel Pump........Its 4" Diamter x 12 inch high,its all aluminum tig welded.
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