I have been reading (SO dangerous, I know) about fuel delivery, and it seems like everywhere is saying about high performance motors is to GET RID OF THE little filter in carb!

Now for someone that wants to do that, and likes to hear from experts that have already done it:
1) WHAT did you use
2) Where is the filter physically located now?
3) Did you notice any performance gain, doing it?

 

1. Billet aluminum edelbrock filter
2. between pump and carburetor
3. good god no

 

**funny you should ask **

I've been tempted to start a thread about my experience which has been very recent. My stroker has a 650 AVS Thunder carb on it. For two years since doing that, my fuel line was the OEM steel line, cut in places for a fuel filter, and another cut up top for a rubber line to go into the carb's dual inlet line.

And for these two years, I've had inconsistent idle and WOT performance when hot. It's always run stronger and on a day-to-day basis, better than with the Qjet, even though I'd had Lars go through it. (Carb was warped) I went to the trouble last summer of removing my hack-job fuel line and wrapping it with insulation from Summit. That helped. My (Fram) fuel filter was at the time, vertically mounted at the front of the head, where the line comes up behind the AC compressor.

Last month, I yanked all that crap out. Got an expensive, high flow fuel filter with AN fittings & replaceable mesh screen & a bunch of 3/8 fuel line. Custom bent it all, and put the new, smaller filter horizontal right in front of the carb. Now it all has proper fittings and no rubber. I did however, reinstall that insulation along the vertical tubing coming up from the pump up the front side of the motor.

The difference is amazing. My idles are now consistent and the WOT performance is terrific all the way to my cam's 5500RPM limit ... each and every time. No matter how long I've driven it or how hot the day is, it runs the same.

Somehow that Fram fuel filter setup with the rubber hose on each end was an issue. There was also the rubber hose at the top, into the carb feed line.

I don't know if my fuel is now getting to the carb COOLER than before because there's no rubber fittings, or if there is another explanation. All I know is that it worked. And worked very well.

 

That is great - care to post a pic or two ?

 

Brand and # of filter, etc.

Thanks!

 

Sure it's midnight now lemme wait 'til tomorrow if it's OK?

 

here's what i run

 

I have the stock in-carb fuel filter on my Q-Jet and it pulls hard to 6000 rpm. I may eventually go to an inline filter but no need right now.

 

if you are using a Qjet then the inline filter is fine...if you are using something else use the Lars article to make your own...it uses a high pressure fuelfilter from an 85 vette and you cusotm make your own rigid fuel lines...

 

Edelbrock #8129 filter. Tubing is 3/8" with 37* -6AN fittings. I bent the line.

 

Here's mine; sorry it took so long to get 'em posted. You'll see the Edelbrock filter w/replaceable screen right in front of the carb, threaded onto the carb's chrome dual line.

There's an s-curve by the front of the valve cover so that when I want/need to I can reinstall the air pump on to that existing black bracket you see. Wow these pics look like my 5-year old stroker needs cleaned up!

 

I have the parts to make that setup down in the garage but did not get around to it last spring. I was having enough trouble bending up a new line starting from the pump. I just need more practice with my tubing bender.

 

Earl'sfuel filter

 

Just for your information, the tubing (if following Lars' paper on proper fuel line) was $40 for tubing, $20 for Delco Fuel Filter GF-652 (replacement of papers' GF-481), $3 for 3/8" inverted flare nuts & I had to get a female 3/8" fitting for my Edelbrock

Should have it all done in a few days ... will post a pic, when completed.

 

Clean looking setup. Does that filter use the normal type flare or an o-ring arrangement?

 

I am doing same thing, uses o-ring type flare, setup on fuel filter connections and regular 3/8" inverted flares on carb & fuel pump.

If you have AC, like I do, the AC bracket will not allow the fuel filter to be where it is at in picture, and will have to be mounted horizontally along edge of valve covers & intake. (That is how I am going to do it anyway)

As bobvette told me, check out Lars' paper on it ..... takes you right through it, step by step!

 

I appreciate the information. I don't have A/C, so that makes packaging easier. Thanks!

 

Another vote for the Lars setup.

 

I just finished bending up a setup like Lars suggested, but used a filter like paul67 is using. I already had the filter from the Edelbrock I just replaced with a Qjet, and the aluminum filter looked nicer than the one Lars suggests.

 

I use an inline filter between pump and carb on my GM 350 HO: