Mechanical MFI fuel pumps - Help Needed

M491Cabriolet · 02-09-2009, 10:43 AM

I have some questions for the experts! I have a 1972 2.4 911T engine currently in my 1972 911T that is extremely good health, with 97% and 98% leakdown results on all six cylinders. The engine in the car has a 2.4 E (014) pump on it, but my mechanic (ASG in Fairfax, VA) tells me that pump might be in need of a rebuild soon. Notwithstanding the mechanic's prognosis , this car is really making me happy! It's quite cantankerous when cold, but when it's warm, it feels great to me. The idle even holds at 950 to 1000 RPMs. Hats off to ASG!

I also have another 2.4 liter engine currently on a stand being completely rebuilt with 2.4 911S heads, 2.4 S Mahle pistons and cylinders, E cams, magnesium 911S MFI stacks, and I'm currently planning to use a 2.2 911E,freshly rebuilt mechanical MFI pump.

OK, so here are the questions/problems: First, I am now having some untimely doubts about the 2.2 911E (010) MFI pump because I'm not sure it will have a fuel curve that will be useable on either my 2.4 liter 911T or the rebuilt 911E/S spec engine. Do you know if this pump would work OK on either or both engines?

Second, does anyone have one or two known very good or rebuilt 2.4 911E or 911T (014 or 015) (or even a 013 2.4 911S) MFI fuel pump(s) for sale? I say "two" just in case the rebuilt 2.2 911E (010) pump would not work on either of my engines. Any info would be greatly appreciated!

balleta · balleta's Garage

Do a search for fellow Pelicanite John Schaefer from Florida. He got some for sale few months back. He also got parts and knowledge on them.

jbell959 · 02-09-2009, 11:16 AM

I'm not an expert either but in general I would say that any MFI pump can be modified and adjusted to work with almost any engine. I know a lot of people have used the 2.0 pumps on engines up to 2.8 and I have a modified 2.4 MFI pump on my 3.5 MFI engine. I also have a 2.2S pump on my 2.5SS engine.

That being said, I would think you are better off selling or trading your 2.2E pump for a 2.4E or 2.4S pump (if you can find one). Since your 2.2E pump is already rebuilt it has a lot of value to someone with a 2.2E. That would give you the money to get a 2.4 pump and have it modified or adjusted specifically for your setup.

Personally, I would give Henry over at Supertec a call and he could answer your question in 30 seconds and you'll know you have a working setup.