Scored a large displacement MFI setup

[Jgordon]

Aside from being relative unobtanium, could one of you guys explain why an mfi setup would be better than stock? I'm just curious as to its advantages. Thanks.

[Shuie]

Originally posted by Jgordon
Aside from being relative unobtanium, could one of you guys explain why an mfi setup would be better than stock? I'm just curious as to its advantages. Thanks.

No. Its exotic, sounds great, has great throttle response, is easy to work on, and is period correct for my car. Its better for racing applications than CIS is, but I dont think I drive the car hard enough for it to make a difference.

Carbs or CIS would probably work just as well for what I do with my car, but its going to be pretty neat to have a 3.2 short stroke MFI motor that looks like my stock 2.4 T motor does.

[Shuie]

dd, CR is 9.8:1. Im going to call Jon at EBS to find out how much it will cost to port my heads. He gave me a price on the injector tap work a couple of weeks ago, maybe the porting wont be too bad.

Noah, from what I was told by the seller, the setup is stock. Thats why Im confused about the 39mm throttle bodies. They should be 36mm if they are from a 2.7 RS

[GeorgeK]

Sherman, maybe a silly question: are the bodies 39mm at both ends?

[dd74]

Shuie - check this thread...

FS: 1979 3.0 SC Engine

It's a '79 3.0 engine for sale, which I believe has 39mm ports. Maybe you can get the owner to part with the heads while either leaving yours intact or selling them.

Just a thought.

Another thought: could the throttle bodies have been adapted or modified to 39mm? If so, is the modification reversible?

Maybe George K is onto something, as well.

[Shuie]

George, Im pretty sure there is a taper on the throttle bodies, but I have not separated them from the stacks so I dont have a measurement for the top portion. The ID of the top end of the stacks are 43mm before they start to flare out.

[Manipou]

1974/75 2.7 Euro Carreras also used the 019 pump didnt they? I have a 75 2.7 Carrera and It has the 019 pump or does that mean they have used a 73 RS pump somewhere along the line??

[toomany911s]

What is an 021 pump for?
Thanks
Ian

[Manipou]

http://www.pelicanparts.com/techarticles/911_MFI/TipMFI.htm

1972/73 2.4S pump

[andyjboy]

Ian - from my notes an 021 pump was used in the '73 S.

[toomany911s]

Thanks Andy,
by the way there's a 67 912 Right hand drive coupe here for sale, if you're interested let me know
Best Regards
Ian

[skinnerd]

I think there is a lot to making your RS MFI work on a 3.2. The space cam in that pump is specifically geared to the 2.7 8.5:1 S cam engine. Anything else will not run that well with it. You would need a special space cam for your displacement and particular cams you are using. You will also need to have the pump drive coming off the front of the driver side cam.

A great find....but unsure if you will be able to use on your 3.2 without a lot of mods to both the engine and MFI pump. Wishing you luck with your project.

[BURN-BROS]

I believe that Shuie has sold this pump and moved on to other things since his last post on 12/2004. MFI on a 3.2 is doable and reportedly runs great.

[Shuie]

My romance with MFI is over. This stuff is all long gone. I bought a boring old 3.2 Carrera motor for my car.

MFI can be done on 3.2 motors and bigger. People do it all the time. There is nothing complex about it at all. Its just money. A lot more money in the heads. Thats why I bailed out on this project. I had $1200 worth of work done in my smallport SC heads when I found this setup. Going to MFI would have involved full disassembly of the heads, another $600 in machine work, and reassembly, + the money to adapt my cams.

If I had matched the cam, compression, etc., of my 3.2 with the characteristics of a 2.7RS motor, this pump would have worked like a charm. Fuel volume was never a concern with the MFI. Money was. the small parts add up quick. Adapting a system like this will nickel and dime you to death.

Henry Schmidt at Supertec can package complete MFI systems for motors like this one and bigger. That would make everything a lot easier.

[BURN-BROS]

How is that 3.2 working for you?

[Shuie]

Its not in the car yet. Ive been slacking.

gearbox is in. new CVs are in. coilovers go in this weekend. Motor is waiting on the stand. Oil cooler and time are all I need to finish it at this point.

Im going to force myself to get it running here pretty soon so its driveable by the time the hurricances come rolling in this this year.

[BURN-BROS]

LOL! I know what you mean...

I test drove an early car with a 3.2 and its a great driver. I think you will be happy with it.

[Flieger]

My 911 has velocity stacks with part number 911.110.316.1R. What re these from?

Thanks

[BURN-BROS]

T stacks.

[Tyson Schmidt]

Originally posted by Flieger
My 911 has velocity stacks with part number 911.110.316.1R. What re these from?

Thanks

A '72 or early '73 911T.

16=T

14=E

12=S/RS