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Fuel pumps and regulators.
https://slantsix.org/forum/viewtopic.php?t=55415		 Page 2 of 2
Author:  Joshie225 [ Fri May 23, 2014 3:06 pm ]
Post subject: 
Don't put a throttle in the path of your wastegate signal. You want the wastegate to control the turbo based upon what the turbo puts out, not what you're metering into the engine with your right foot/throttle.
Author:  Joshie225 [ Fri May 23, 2014 3:08 pm ]
Post subject: 
Don't put a throttle in the path of your wastegate signal. You want the wastegate to control the turbo based upon what the turbo puts out, not what you're metering into the engine with your right foot/throttle.
Author:  Junior [ Mon May 26, 2014 9:09 pm ]
Post subject: 
what size return line is everyone using?
Author:  Junior [ Mon Jun 16, 2014 11:08 pm ]
Post subject: 
Quote:
what size return line is everyone using?
anyone? i have the pump, a walbro 255lph and about to get the regulator mallory 4309. after that im gonna get it going again. i have a 3/8" from the tank to the pump. 3/8 return line was recommended on theturboforums but i think that may be excessive and wouldnt allow the regulator to give me the pressure im going to need. i was leaning tward 5/16" return line.

anyone have anything to add? would be greatly appreciated.
Author:  Dart270 [ Tue Jun 17, 2014 3:48 am ]
Post subject: 
I bent a 3/8" line for feed, and use the stock 5/16" line for return.

Lou
Author:  Joshie225 [ Tue Jun 17, 2014 8:15 am ]
Post subject: 
The return line is generally the same size as the supply so that the regulator has control over the fuel pressure rather than the restrictions in the plumbing. The regulator is closed until the pressure is at the set point and then starts dumping fuel into the return line.
Author:  Shaker223 [ Tue Jun 17, 2014 8:27 am ]
Post subject: 
3/8 both ways.
Author:  Pierre [ Tue Jun 17, 2014 8:49 am ]
Post subject: 
No such thing as too big a return line. If it was too small, you wouldn't be able to adjust pressure low enough due to the artificial restriction the line makes. If there's not enough pressure the regulator takes care of the rest.
Author:  Junior [ Tue Jun 17, 2014 1:13 pm ]
Post subject: 
ok 3/8 it is. thank you. i got around to thinking about it and came up with what yall said about the smaller line not letting the regulator do its job. just wanted to make sure. thank you for all the replies.
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