Double Pumper Install

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Feb 19, 2019, 06:28 PM

steven121

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Double Pumper Install

going to have a member build my double pumper setup. Going to have my tuner install the hobbs switch and connect the second pump.

but my question is do you tee the second pump into the main fuel line?

Or do you connect the second pump to the evap line and tee into the main fuel line in the front?

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Feb 21, 2019, 09:27 AM

butte

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Someone just posted a similar thread that may be of some help

https://www.evolutionm.net/forums/ev...el-system.html

Whoops, I see you've already posted in there

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Feb 21, 2019, 11:16 AM

2006EvoIXer

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I think you can run both ways. There are pros and cons to each. What size is your main fuel line? OEM 6an hardline? Or aftermarket 8an or 10an? If OEM 6an, then use evap line.

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Feb 21, 2019, 11:41 AM

240Z TwinTurbo

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GTR (R35) guys are making 1000+hp all the time on factory 3/8" supply line with double pumpers (twin 485's).

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Feb 21, 2019, 01:07 PM

heel2toe

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How large is the factory feed on our cars? If I had to guess its gotta be around 5/16 or somewhere in that neighborhood. 3/8 is -6AN which seems kind of small. No way you're making 1000whp on an evo on factory lines on ethanol.

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Feb 21, 2019, 01:14 PM

240Z TwinTurbo

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Quote:

Originally Posted by heel2toe

factory supply line is 5/16"

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Feb 21, 2019, 01:29 PM

steven121

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Quote:

Originally Posted by 2006EvoIXer

I think you can run both ways. There are pros and cons to each. What size is your main fuel line? OEM 6an hardline? Or aftermarket 8an or 10an? If OEM 6an, then use evap line.

using oem, not goinf to run a bigger line

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Feb 21, 2019, 01:32 PM

steven121

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Quote:

Originally Posted by heel2toe

want to make 700hp. Can be done its tbe second pump that is confusing me for the connection

originally was going to use the evap line, and tee into the fuel rail

but now I see you can use the main line and tee in the back.

but if I can use the evap line instead as a secondary line I will be ok with that instead of the line just sitting there

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