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Super Bleeder!!
04-07-2009, 12:14 PM
Dont use a t-fitting; use a y-block.

Here is a quote from kiggly on the topic:
"scaling for multiple pumps is extremely dependent on the fitting that merges the pump flows. A long time ago I was running a "T" fitting and two pumps in parallel barely flowed more than a single with this restriction."
asshanson
04-07-2009, 12:15 PM
A "Y" fitting would probably have better flow than the "T" fitting, if you can find one. I believe Swifty used a NOS "Y" fitting outside the sending unit on his car.

^^ Same time post, doh!
Super Bleeder!!
04-07-2009, 12:18 PM
http://www.magnafuel.com/products/accessories/Y-fittings/index.htm

http://www.magnafuel.com/products/accessories/Y-fittings/Y-fittingsGroup-500pxW.jpg
santa
04-07-2009, 12:25 PM
I'll throw a mid list up once I'm not on my iPhone. Or if I get bored a work.
Halon
04-07-2009, 12:45 PM
Dont use a t-fitting; use a y-block.

Here is a quote from kiggly on the topic:
"scaling for multiple pumps is extremely dependent on the fitting that merges the pump flows. A long time ago I was running a "T" fitting and two pumps in parallel barely flowed more than a single with this restriction."

Interesting. I'd like to see more info on that if you have a good link.

I ask because I am running two 255's, in parrallel, with a "T" fitting, on E85, airflow right around 60lb/min, still on stock wiring, and haven't ran out of pump. I have a pretty solid 11.2 AFR until redline. If it really barely flowed more then a single pump, I would imagine I would have ran outta pump awhile ago considering I'm running E85, and also have not rewired them with thicker gauge wiring.
turbotalon1g
04-07-2009, 01:18 PM
I was doing more research on T vs Y and found evidence about T not working the best compared to Y.
I will post back if I can find, but if i remember right it was a 3am read so i probably didn't save it.
santa
04-07-2009, 02:34 PM
I'm pretty sure I'll be running a Y fitting for the second pump if I go that route.
95talonracer
04-07-2009, 02:44 PM
If you do dual in tank pumps, are you going to put a spacer in between the 2 pumps? I talked to someone that said they had the 2 pumps right next to each other and they were actually fighting each other a bit so a 1/4" aluminum spacer was added between the 2 and it fixed the problem. Something to think about.
santa
04-07-2009, 04:05 PM
Thanks for the heads up on that Kerry!!
95talonracer
04-07-2009, 05:55 PM
Thanks for the heads up on that Kerry!!

Yep. The guy I talked to said that the 2 pumps right next to each other were actually fighting eachother and creating excess heat. In his case it actually burnt up one of the pumps and created signs of burning in the tank but no explosion thankfully. He said that a 1/4 spacer out of aluminum work and solved all problems. Let us know what you end up doing.