mfi pump for 73 911

Garrett · Post by **Garrett** » Tue Apr 24, 2007 1:04 pm

I have just discovered that my 2.4S has the wrong pump: its a .... 014 Bosch part no. which is correct for a 2.4E. So I am in the market for a 2.4S pump ... 013, and my 014 is for sale or exchange.

Hope this makes sense!

Zithlord · Post by **Zithlord** » Tue Apr 24, 2007 5:21 pm

I think you can also use the US 1972/73 911S MFI nr. 019

John

Lightweight_911 · Post by **Lightweight_911** » Tue Apr 24, 2007 6:11 pm

019 is the '73 2.7RS (& '74-'76 2.7 Euro Carrera) injection pump.

012 is the '72/'73 Us mfi pump for the 2.4S.

You can also use 021.

Garrett · Post by **Garrett** » Tue Apr 24, 2007 9:38 pm

That's handy to know; incidentally, there's a chap by the name of Peter tracking mfi pumps for sale mostly on ebay at http://www.early911sregistry.org/forum/ ... php?t=9730 Thank God for forums and the exteded and connected brethren, I say!

Lightweight_911 · Post by **Lightweight_911** » Tue Apr 24, 2007 10:06 pm

The process of identifying/tracking the sale of mfi components on the Early 911S Registry (along with sales of T/E/S cars, etc) can be both a good & bad thing - if you're looking to buy something on ebay (like the correct mfi injection pump) there's very little chance of stumbling on an item that others may have overlooked...

Garrett · Post by **Garrett** » Wed May 16, 2007 10:03 am

I had it dyno'd last Fri. at Cork Institute of Technology's outstanding transport engineering facilities, and many thanks to Keith and Damien there. Wish I could put the pdf of the curves up for viewing ( don't know how...), but max torque = 158 lb.ft/ 213 N.m @ 5530 rpm; Max ISO power 189.4 BHP @ 6721rpm. Lambda indicated rich below 5000 ( 0.8 - 0.9) but OK above: 0.9 - 0.95. Advised to leave mixture be, just check plugs from time to time.

I won't now be replacing the pump. Judging by the performance on the rolling road it looks like it was rebuilt as an S pump in the past, maybe the original 3d cam was fitted to the exchange pump, does this happen?

davidppp · Post by **davidppp** » Wed May 16, 2007 7:45 pm

Hello there.

You may be surprised to learn that the results you quote would be quite consistent with a T pump in fact: its a simple matter to make the mixture correct at the top end..because all the pumps are identical above about 4000 rpm..

The differnce with the S pump is that it will also give a correct (leaner) mixture below this.

Kind regards
David