Weber Rebuild - girlfriend pic

[Kilgore Trout]

It's a solid 85 here in Ohio. I have given up for now. I have superglued my merilli dist rotor, fixed my dist clamp, and am now suspecting a crappy fuel pump. Since searching for various items, I came across the advice of "Check/Measure/Adjust"...Must remember, good advice! While checking my points, I noticed the dist was not tight. Sheesh,I knew I needed to get back to that. The stamped clamp was not holding, had made it only better previously but KNEW it needed attention.

So, am working towards a good 900 rpm to check the air, maybe now. I thought I had it, but started seeing fuel flow go dry in my filter. This is the second see through filter, just to see what is going through the line. I promise I will get a proper filter. The idle seemed to drop when it went dry. No f'ing kidding. Thought I might be running low and went to the gas station. It's very encouraging that I can get to the gas station and back with only preliminary carb adjustment.
I am going to reference this post:
http://www.early911sregistry.org/for...p+intermittent
Here is my fuel pump setup. I also am going to quote sonett43, "pumps in that form factor" mostly junk if i recall.

Also a pic of the girlfriend birdwatching in WV. And my headlights, I thought they were very cool. You all like pictures right?

Am I right in thinking I have a problem getting a good solid fuel pressure if my filter is going dry? Or is that typical?

Thanks, everybody needs a hobby right? (If I don't mow some grass soon....)
Dan

[jeff eelkema]

Those pumps generally wont work as a "pull" pump but can work if mounted near the tank and close to the low fuel level. With this gravity assisted feed they will "push" fuel fairly well.

[72targa]

Somebody needs to start reproducing our MFI fuel pumps. They are quite pricey, otherwise, assuming you can find one (at least online):

Pelican - NLA:

http://www.pelicanparts.com/catalog/..._pg1.htm#item3

Zim's - "Due to lack of cores, these are R&R only":

http://www.allzim.com/acatalog/Reman..._73_w_MFI.html

Maybe these might work OK?:

http://cgi.ebay.com/ebaymotors/PORSC...=p4506.c0.m245

http://cgi.ebay.com/ebaymotors/Porsc...=p4506.c0.m245

[911TES]

Dan I have a similar problem with my 1969 T. It look like the same pump with same problem of the high mount, loops and pre-filter.

It was previously hanging down near the valve cover and I was attempting to move it away from the heat. The PO placed a bag of ice on it when it vapor locked.

I currently show a steady 3.5 lbs of fuel pressure, but the car won't properly idle and the see-thru filter never fills completely with fuel - stays at ~60% fuel / 40% air.I'm currently planning on a "Pierburg" pump, but am trying to understand if it's just another pump that has difficulty pulling the fuel.

Ideally, the pump would be mounted low, up by the tank, but I want to maintain stock configuration.

Any suggestions appreciated.

Bill

[Kilgore Trout]

After searching I found a good one and will return to it.
http://forums.pelicanparts.com/showt...hlight=cohline
Thanks for the replies, guys. I am noting many of posts about MFI pumps. I am thinking higher presure for fuel injecton with some kind of regulator, right? I am coming from a fuel injected VW background, though electronic, not mechanical. These also have a return line to the gas tank.

SO, for an old 69 with webers, do these pumps even apply? I certainly have a Vanagon pump around. Does it matter what pump for carbs, as long as it is regulated to the correct preasure? It does sound like a return line would be necessary with a set up like that.

And another thing, these pumps should be used with a relay that shuts it off if the engine stops, right? Safety? I am not even sure my current setup does that...

I tend to ramble, maybe nonsense, I hope I am not bugging anyone. Let me know if something I say sounds way off, I can take it.

One more thought. Has anyone found suitable pumps, regulators, etc. at Summt Racing? I know we aren't talking supercharged V8's here, but they are down the street practically.

Thanks
Dan

[sweetE]

Dan,

I have a 912E ,which when it was changed from MFI to Webers, the fuel pump was not changed.
The fuel pressure regulator was a "U" bolt on the fuel input line. Not the way to do it, however.

I have since installed a proper fuel pump with the correct lower pressure for the carbs.

[rick2]

If memory serves it is Ollies that is rebuilding mfi fuel pumps as well and had a few on hand. The mfi style pumps put out 11 to 12 psi and with carbs you'll want 4 psi. It looks like you have a 69T which didn't come with mfi so to change over may be costly anyhow. I ran one of the puralator "thumper" pumps on my 73S with carbs for years with no trouble. It was mounted lower where the mfi pump was. I would also check your voltage at the pump, years on old wires and connectors in Ohio can take their toll. I grew up in Canton so that's what I'm basing it on.