blown90lx

iTrader: (3)

im putting together a twin intank using stock feed and purge lines with mallory regulator and twin 255 pumps. also using billet fuel rails. -6line


my question is do I have to run the second pump on a boost switch? is anyone running without boost switch? Im wondering if it will increase my pressures down low/idle with having both pumps going and such a small return line.


tia!

Mike

Im not wanting to use a switch to keep everything as simple as possible. 1 less thing to worry about when I get into boost.

Nasty N8

iTrader: (33)

Bigger problem is heating the fuel with both running through -6 line all the time. Run one on a switch. I would up the line size you are going to be choking those pumps with that small of line.

Nate

BlkHwk

iTrader: (8)

I have twin pumps with -6 return 1/2" Feed. I haven't had a chance to play with it a whole lot. I tried running both pumps @ idle just to make sure everything was workin and it definately affected fuel pressure. When I went back to 1 pump @ idle I had to adjust the FPR quite a bit to get back to 60 psi. I personally would only run 1 pump till you need the 2nd one. I have read of guys runnin both pumps continuously without probs, but I don't think mine liked it very well.

stevieturbo

I run a pair of Bosch pumps full time...( external )

Ive only done about 10,000miles with this setup, but no probs so far.

-8 feed, with -6 return.

blown90lx

iTrader: (3)

plenty of people run the stock line setup with twin intanks. speed inc has supported 1000rwhp with this setup. Id rather not use one on a switch for the fact that its one more then that could go wrong.

mike