Drifto

iTrader: (6)

Nice write up^ but I guess no one paid attention to the fact I stated how to intall it a few post up without having to use hose clamps or teflon tape...

mrfred, did you need to drill out your siphon orfice to get the base pressure regulated? On my set up, rewire(14v) -8an feed, stk feed as return and Aeromotive FPR, I could not get below 62base until I drilled the siphon out with a 9/64" bit. Pressure came down to 42 after that.

mrfred

iTrader: (50)

Yeah, I would have secured it the same way you did using the factory clasp at the bottom of the pump, but the pump carrier had already be cut for the hose clamp approach. The only thing that worries me about using the factory clasp is choosing a sock that provides enough flow. Which sock did you use?

I'm using a custom wiring job that retains the factory low voltage circuit, and base pressure was sitting right at 45 psi (with fpr vacuum line disconnected) at idle with the stock siphon size. I did drill out the siphon slightly to 7/64" to see if it would lower base pressure down to 43.5 psi, but it didn't make an appreciable difference.

Drifto

iTrader: (6)

I'm using a large Walbro sock, but I don't think it's as big as the one you show in your post.

mrfred

iTrader: (50)

Do you know the part number for the sock you used?

420a-t

iTrader: (15)

Did you get a chance to test any flow ratings on this guy?

mrfred

iTrader: (50)

No easy way to do a flow rate test with it installed in the car, but:

https://www.evolutionm.net/forums/ev...6-testing.html

Drifto

iTrader: (6)

I do not, but I'll see if I can figure it out for you. It looks the same as the one you posted except not quite as long. I didn't special order it. It came with the 255hp I had in the tank. I just swapped it over.

mrfred

iTrader: (50)

Ah, that should be the 125-147. Its the short version of the 125-142. Both have a bigger opening that extends down more than the factory sock. I was eyeballing the 125-142 yesterday, and now I think its as tight a fit as the sock that Walbro recommends for the 400/416, so I'm a bit surprised you got the 125-147 to fit. Was the clasp bulging from contacting the nozzle on the sock?

Drifto

iTrader: (6)

Clasp? Bulging? Nozzle? Sorry but I don't know to what you're referring to. Help me out None of it looked deformed. What part surprises you about the fit?

EvocentriK

What is the result running one of these with factory wiring? Will it outflow a 255 or DW301 when run on factory wiring? With specs of ~298 LPH @ 12v & 70psi seems to me like it would.

drb

iTrader: (39)

Yes it will definately outflow a 255 on the factory wiring.

stilloem

iTrader: (1)

i know this is a old post but i would like to know if antone ever tried the sard jet pump killer over drilling the siphon

mrfred

iTrader: (50)

It does address the issue, but its $100. Why not do it yourself with a $2 drill bit?

bigdnno98

iTrader: (12)

^^ agreed. drilling the siphon is one of the easier mods I've done to this car.

Yamahar1

iTrader: (35)

What size drill bit should I use for a -6 return?