Fuel restriction?

So.Bay*310* · 03-13-2009, 09:03 AM

Just like the title says. I'm getting close to getting my sled in the water, and wanting to make sure I do this right. I've asked a couple of people about running a fuel filter inline suction before the pump. Will this be a restriction point?

I'm running a 468 BBC 12.5.1 compression w/mechanical Holley pump. Not sure what the GPH rating is. Does anyone know for reference??

So, my question is, will there be a problem plumbing a -10 ''Y'' fuel block inline with a -10 Earls mini fuel filter to the pump? Is my fuel flow gonna be okay on the suction side?

Some say, since i'm running only race gas, no need to utilize a filter. Some filter the fuel before filling the tanks. I'm gonna be safe and do the same anyways. I DO NOT plan on filling on the docks either.

Some insight please.
Thanks. Nandi

**IMPATIENT 1** · 03-13-2009, 09:07 AM

nandi, i always filter before the pump no matter what kinda fuel i plan on using. doesn't matter if its race fuel or pump swill, shit will still make its way into the tanks and need to be filtered out. something as small as a piece of debris in your funnel during fill up could clog a jet in the carb or stick a valve in the pump. its just cheap insurance to filter the hella outta it.

**NiceGuyEddie** · 03-13-2009, 11:23 AM

Different story with inline electric pumps though, if gravity is not on your side. I had to put mine after the pump as it was hard to prime.

Run a filter before your mechanical pump. You should be fine with that combo. Are you running regulator?

**ironman** · 03-13-2009, 11:29 AM

Good advise there Impatient 1, When I build custom fuel tanks for people I ALWAYS recomend runnin a filter before the pump. I have seen sh*t come out of a sealed 5 gal sunoco can.

Ironman

**IMPATIENT 1** · 03-13-2009, 11:32 AM

Originally Posted by rIVERtRASH

Different story with inline electric pumps though, if gravity is not on your side. I had to put mine after the pump as it was hard to prime.

Run a filter before your mechanical pump. You should be fine with that combo. Are you running regulator?

there's always a low nuff restriction filter to handle the job, gravity fed or not. only electric pumps i've ever had fail on me where due to damage from a outside source, be it not bypass'n when i should've or not filtering when i knew better, lessons learned the expensive way

So.Bay*310* · 03-13-2009, 11:48 AM

Thanks for the info. I feel more confident now that you guys have put some insight into my head.

I guess a visit down to Earls on tuesday will have to be made. I'll make sure I bring a blind fold when the final cost gets rung up.

**IMPATIENT 1** · 03-13-2009, 11:51 AM

Originally Posted by So.Bay*310*

Thanks for the info. I feel more confident now that you guys have put some insight into my head.

I guess a visit down to Earls on tuesday will have to be made. I'll make sure I bring a blind fold when the final cost gets rung up.

might take along some vaseline as well

**johnray069** · 03-13-2009, 12:37 PM

Originally Posted by ironman

Good advise there Impatient 1, When I build custom fuel tanks for people I ALWAYS recomend runnin a filter before the pump. I have seen sh*t come out of a sealed 5 gal sunoco can.

Ironman

i agree with impatient 1 the only times i have seen problems with the pumps has been due to no fileters. i will agree that some of the electrics are hyper sensitive to gravity, this is many times caused by where they are mounted, most electrics push better than they pull the fuel. most of the fuel filters will have an advertised gph rating use the biggest you can for your application to not restrict your flow. i do not see what model holley pump you have but if memory serves me they have one that is around 110 gph and a hi-po mech. that is 130 and a billet that is around 170. the later 2 will be pretty obvious in appearance ie different from a stock pump any one will be more than adequate for your application.

**cordog009** · 03-13-2009, 01:11 PM

Make sure you get some good filters too. I had tried the cheap way out, along with a couple buddies of mine, and ran those clear filters from Autozone before the pump..thinking we'd be able to see when to change them. Turns out we all had fuel starvation problems as the rpms climbed. I've used Earls filters before and had no issues.

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Fuel restriction?

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