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Author Topic:   fuel filters
eaton89
Member
posted March 27, 2004 11:14 PM
When using a manuel(non electric) fuel pump should fuel push threw the filter or pull threw(filter before or after) does it matter if not is one better than other. Seems like it would be hard to pull threw but once the fuel filter was full it wouldnt be much different.


19J
Member
posted March 28, 2004 01:14 AM
Well manual fuel pumps push better then they pull so a small canister filter before the carb is the best way to go i would also use a clear filter just for inspection purposes since a manual pump is only $10.00 at your local parts store you can afford to get a little dirt before the pump.
Just my two cents worth

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you never know how fast you are going when your in the lead, until you blow the announcers hat off!!!


racer17j
Member
posted March 28, 2004 09:46 AM
i run one on bolth sides a clear one like iowa suggested and a regular one right out of the cell


stockcar5
Member
posted March 28, 2004 10:13 AM
not to step on your toes iowagirl but...
mechanical pumps are great pullers and poor pushers.
electric pumps are poor pullers and great pushers...thats what they need to be in or near the tank.

now that isnt to say that mechanical pumps can push well...they do...but they pull better. have you ever seen a diapham pump push 55 psi?

so with all that said i would put my filter after the pump...before th carb. that helps in case anything starts to deteriorate in the pump itself.

luke

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waltonjr1
Member
posted March 28, 2004 11:21 AM

Stockcar 5, I beleive you ment to say mount the filter before the pump, you suggest that a manual pump pulls better than it pushes, with that said the filter should be before the pump so the fuel can get pulled through.



waltonjr1
Member
posted March 28, 2004 11:23 AM

Sorry stockcar, I just read your post again. Disregard my last comment.



eaton89
Member
posted March 28, 2004 09:19 PM
Thats kinda what I figured would be said I was hoping maybe to here something else so I have more room for a filter. Thanks


droper23
Member
posted March 28, 2004 10:46 PM
I run, and have run for many years, one of the 5 inch inline filters. I have it halfway between the fuel cell and fuel pump. I have never had any problems with this setup. However, as someone mentioned earlier, I do NOT run 10 fuel pumps, so I do not want trash getting into my fuel pump. My fuel pump costs arount 120.


droper23
Member
posted March 29, 2004 08:49 PM
By running the filter in line between the cell and pump, it keeps trash from getting into the pump. If trash cannot get in the pump, it is obvious that it will not pump any trash to the carb.


racer17j
Member
posted March 29, 2004 10:44 PM
dropper do you run gas or alky i can never figure out why guys that run gas buy a hifi pump and then have to choke it down to the same psi that a stock cheapy puts out? guess thats just me tho i run the cheapest stuff i can get by with


iowa_dirt_track_girl
Member
posted March 30, 2004 04:40 PM
ok guys if a stock pump pulls better then it pushes then how come when you take it lose from the carb it shoots gas all over the place do you think that it pulls that hard or harder also and yes if you are running a high fi pump you would probably want to run a filter before the pump heck why not run a stainless steel filter so you can check and clean it out after every race if you spend that kind of money on a fuel pump whats another 100 dollars or so on a fuel filter
But if you run a hobby stock and your not really woried about a 10 dollar pump why chance it!


droper23
Member
posted March 30, 2004 09:19 PM
I run methanol, so I need the high output. That is why my pumps cost a little more. I also have a stainless steel filter in my fuel filter, not a paper one.


WesternAuto17
Member
posted March 31, 2004 08:12 AM

By definition, a mechanical pump has to be a better puller. It has to pull fuel from 8-10' of fuel line from the tank / fuel cell. It only has to push the fuel 2' at 8 psi. I have my filter at the cell, but a stock set up has the filter in the carb.

I guess if the pump came apart, a filter before the carb would help. I have never had a fuel pump come apart in that manner (I've had them break in every other way).

I don't think it matters. A stock pump will be able to make 8-10 psi even with a filter on both sides of it.

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