Walbro 400LPH with stock lines?

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03-26-2013, 10:43 PM

#11

Atomic

I have a gauge for that

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It will be fine.....even if it did overpower the regulator, you can fix it by tuning the IFR table

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04-04-2013, 11:10 AM

#12

Ferocity02

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Quote:

Originally Posted by slowswb

You will be fine as long you have a return on it only over flows regulator on f bodys not on a trucks do to that fact they are large! Are going to gas or e85? If you go e85 use the 450.

Found this thread on tech where guys say they are running twin 255's and twin 340's on the stock fuel system!

https://ls1tech.com/forums/forced-in...-straight.html

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04-04-2013, 12:59 PM

#13

219boone78

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i just ordered one off ebay for 117 to drop in the 400 where my 255 was. now, what should i do with my wiring? i herd of some type of hotwire kit??? if thats what i need, or what u did, where did u get it from.

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04-04-2013, 01:11 PM

#14

nonnieselman

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I am running twin 255's in the tank and both are on at the same time.. i havent gotten around to redoing it to a hobb switch. but at idle its only about 3psi more than what a single 255 was doin .

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04-04-2013, 01:22 PM

#15

Ferocity02

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Quote:

Originally Posted by nonnieselman

I am running twin 255's in the tank and both are on at the same time.. i havent gotten around to redoing it to a hobb switch. but at idle its only about 3psi more than what a single 255 was doin .

Good info. What's your idle pressure? Mine is 56psi (with vacuum line disconnected) with a single 255, stock wiring.

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