Scored a large displacement MFI setup
 

If this is a dream, please don't wake me up :)

What do you guys think this was from originally?

Intake port orifice measures 39mm, the top of stacks are 43mm. Everything was covered in dust, but it cleaned up nicely. The pump turns over smoothly by hand and the throttle plates all move smoothly and freely.

I know that the '73S shared some part numbers with the 2.7 and 3.0 RS cars on the MFI setups. Is there anyway to tell if this came off of a 3.0 RS without disassembling the pump and looking at the spacecam? Can you guys tell from the serial numbers?

TIA

http://forums.pelicanparts.com/uploa...1103409452.jpg
http://forums.pelicanparts.com/uploa...1103409461.jpg
http://forums.pelicanparts.com/uploa...1103409469.jpg
http://forums.pelicanparts.com/uploa...1103409479.jpg
http://forums.pelicanparts.com/uploa...1103409490.jpg
http://forums.pelicanparts.com/uploa...1103409509.jpg
http://forums.pelicanparts.com/uploa...1103409520.jpg

WOW - Good for you!

In Bosch-speak 0408 126 019 is a '72-'73 2.7SC MFI Pump!

In Porsche-speak that is a 2.7RS. The Porsche part number is 911.110.254.00.

Judging by the casting date (51/72) and the serial number (32302158), I would speculate it is a '73 2.7 911RS. Someone with access to the numbers can confirm. I suppose it could be a 3.0.

Best,
Grady

Holy **** Batman!!

Tell us the story then! :)

Thanks everyone!

So the big question is, can I put this on my 3.2 without re-camming the pump?

You guys would never believe me. This was luckier than finding my 3.2 Max Moritz motor. Oh well, I'll take luck anyday :)

Yes, lets hear the story!!

Sherman,

I'm off to the Pelican Gathering of the Flock.

The answer is a qualified "yes." I'll e-mail you tomorrow.

I just think you saved this from a dumpster.

Best,
Grady

Sweet, you realize you have to drill the heads to add MFI to a later motor.....

thanks Grady, I appreciate the help.

Yep, thats the easy part. The hard part is the stacks and throttle bodies. Im still struggling with the 4 bearing cam towers and cams, but I think im making it more difficult than it really is.

The only bad thing about this is that I already have a fresh set of stock smallport SC heads from EBS with all new valves, guides, springs, and retainers that do not have the right port size for the RS throttle bodies.

I didnt want to change anything too drastically on this motor since it ran very well with the small port heads, GE40 cams, and webers. I hope that going to the bigger ports, and MFI doesnt throw off what Ive been told was already a great motor.

the port size thing is throwing me off

From BA's book, the port sizes
2.7RS 36mm
3.0RS 39mm

My throttle bodies are 39mm. Can someone confirm that this setup is NOT from a 3.0RS?

I think you need a different (and probably custom) space cam - not an MFI expert tho.

Oh thats right its running the pump from the cam that is tricky. Wasnt there a guy on the board who did this 3 or 4 years ago and sold the car?

Hi

from this picture it looks like it is from a twin plug engine, RSR?

http://forums.pelicanparts.com/uploa...1103409469.jpg

The RSR had slide valves or high butterflys intakes. Its definitely not from a RSR. Everything Im reading and being told leads to a 2.7 RS.

I'd love for someone to confirm the port size for a 3.0RS is 39mm. I know Hans can figure out the spacecam issue if the pump will not work well as is on my 3.2, but Id really like to know that the stacks and throttle bodies were going to work so I can address my heads.

Very cool Sherman! If you can find the early SC (78/79) they will have a 39mm intake port. HMM if yours don't fit, they will fit mine. :D

That 3.2SS will rock with MFI!

Thanks Jamie, thats what I was thinking.

Problem is that I just got my now basically 100% new set of small port heads back from EBS. Now they have to be tapped for MFI injectors and ported to 39mm on the intake side. It never ends :)

Great find Sherman! It's got to be a good story, c'mon.

Well, from what I know, the GE40 cams are pretty radical, so depending upon what your compression is (what is your compression?), you should have a lot more top end if you bore the heads. Torque loss on a little '72 should be neglible.

Wayne sells naked heads fairly reasonable. If you sell the fresh small port SC heads, you'd probably have enough $$ to put a dent in the cost of new heads which are bored out properly. But does anyone on this board want fresh small-port SC heads? Maybe if they're into keeping things stock - or are into torque more than top end power. So, in short, you might be stuck with boring the heads out anyway.

Whatever you do, don't get rid of that MFI...

Kudos Sherman, great find!

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. :cool:

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 :confused:

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

Shuie - check this thread...

http://forums.pelicanparts.com/porsche-911-used-parts-sale-wanted/196000-fs-1979-3-0-sc-engine.html

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.

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.

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??

What is an 021 pump for?
Thanks
Ian

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

1972/73 2.4S pump

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

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

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.

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.

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.

How is that 3.2 working for you?

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.

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.

Velocity stacks
 

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

Thanks

T stacks.

Re: Velocity stacks
 

A '72 or early '73 911T.

16=T

14=E

12=S/RS