CIS with a Carrera intake, stranger than fiction.

911st · 12-30-2010, 05:16 PM

This is so interesting, cool, and weird I had to share.

It is a Turbo motor with a 3.2 Carrera intake manifold using CIS injection!

Look in the back right corner and you can see the metering assembly.

Look between the intake runners on the left side and you can see the WUR peaking up.

A lot of work went into it. Air comes in through the rear passenger window, thru the metering assembly and to the turbo.

Then goes to an intercooler in the left fender and comes back to the throttle plate.

Wow!

fastfredracing · 12-30-2010, 06:32 PM

That is super wild weird, and wonderful in its own special way. Was this done recently, or was it done before EFI was so popular and available to the masses? Could this be one of the huge horsepower cis motors that they say do not exist?

RarlyL8 · RarlyL8's Garage

Wow! Nice find Keith!
You really gotta want to keep CIS to do something like that. There's gotta be 10 feet of pipe from the air meter assembly to the turbo and then back to the intercooler. I can only guess that the inventive fellow that did this wanted to open the heads up and the entire intake track. I can also only guess that this setup made peaky high HP. Race class rules to keep CIS possibly?
Know who did it?

911st · 12-30-2010, 08:01 PM

It is a fun study in what is possible.

I see how a Carrera manifold could be fit to a 930. Though the value seems very questionable.

Said car has been advertised as a 73E converted to a turbo slope nose here and elsewhere. See: 1973 Porsche Race Car - Price lowered!!!!-

It is hard to trace the piping.

On the intake it looks like the metering section was moved to the right no more than about a foot so that did not add that much to the piping.

Most of the pipe looks like it is for the remote intercooler.

See more car pics here: Header

Jim2 · Jim2's Garage

I was reading the ad for this car some time ago and found it odd that it was a turbo'd yet only made the HP of a NA motor. Good to finally see what it's about.

lite75 · lite75's Garage

Interesting, it looks like it has the plastic injector blocks under the 3.2 intake. anyone here ever try boring those to 40mm?

A930Rocket · 12-31-2010, 07:59 AM

It's an interesting car, but as far as a competitive race car goes, I'm going to say no. I was probably built YEARS ago from the looks of it (cage, seats, wheels, etc.). It's more of a novelty street car now and I wonder how fast it is, how it handles, and comfort.

I'd be surprised if it goes for the asking price, but what do I know...

RarlyL8 · RarlyL8's Garage

Ha! Guess I was completely off on why the Carrera intake was used.
I don't see the engine size listed but the HP level is dismal. A warmed over N/A 3.2L will put that down at the wheels.
I have no idea why this was done.

911st · 08:44 AM

Ya.

Traded messages with who is selling it. He said the dyno test did not go well.

Seems with all the creative fabrication he could have figured a way to mount the CIS injectors without the blocks for a more open intake path.

Anyway. Still fun to look at and dose seem to dispel the idea that one can not run a Carrera manifold with CIS.

.

930gt-40r · 930gt-40r's Garage

something has to be wrong- I bet that it could put out a lot more than it did with that setup. A+ for creativity. I would have put the intercooler up top where it is supposed tobe though...

patkeefe · 01-02-2011, 01:34 PM

Is that a Vario-Ram manifold?

gsmith660 · 01-02-2011, 03:19 PM

Looking at the pics the oil drains into the oil plug on the bottom of the case no sump cover so year does that make the motor I am guessing fairly late model so the turbo must not be adding much to the output of the motor just a guess.

911st · 01-02-2011, 03:32 PM

Not a Vario.

Good catch on the turbo oil drain.

That and being a 3.2 indicates it is probably not a turbo block to start.

Could be a 3.2 Carrera or SC with 3.2 short stroke pistons to start with.

Might still be full NA compression if a Carrera was used as the base.

Dyno numbers may suggest it is not getting any measurable boost.

gsmith660 · 03:58 PM

Not a 3.0 liter and I thought 3.2's had a sump plate with no drain but I am not sure. I just looked at the PET and I guess the sump plate stopped with the 3 liter so it could be a 3.2.

patkeefe · 01-02-2011, 04:10 PM

Incidental info, but I was showing my wife where I long ago used to work in Tucson when we were out there two weeks ago. This shop is right behind one of my old places of employ. I thought I recognized some of the stuff in the photos!

911st · 01-02-2011, 06:28 PM

Good catch, no sump plate on a 3.2 or 3.3T.

Best guess then, it could be a 3.2 Carrera long block w stock high compression pistons.

proffighter · proffighter's Garage

Quote:

Originally Posted by 911st

Good catch, no sump plate on a 3.2 or 3.3T.

Best guess then, it could be a 3.2 Carrera long block w stock high compression pistons.

Wrong. Sump plate on my 3.3T '81 as on all early 930 turbos

gsmith660 · 01-03-2011, 01:58 AM

What I can find out is the sump plate went away after 83.

RarlyL8 · RarlyL8's Garage

Case design changed for 1984. I went and looked at the photos and it seems this engine should put out way more power than advertised. The 4spd tranny would also not be a good match for a low-output engine.
I agree that this looks like an old build. Those Yokohama tires look old and worn out. If they are 285/345 as they appear to be, they have been out of production for about a decade.
Very interesting puzzle ...

911st · 01-03-2011, 08:52 AM

15" wheels?

Makes sense on the case changing with the 3.2 Carrera in 84.

Could be a 3.0T base motor with 98mm cylinders. After all it has the trans from one.

However, if that was the situation it would seem it would have the turbo savaging pump. I guess they could have given that up with a cam change or something.

Just guesses. Yes, a fun puzzle.