I am not sure where to post this, I still don't know how to call it in fact. Is it even a Porsche? I hope I don't get whacked on the head by the purists!!!

I just bought this car in the US, unseen, it is a 1974 911 S that has been modified to a 993TT body with steel Porsche body parts. The engine has a Garrett twin turbo setup built by Protomotive 1500 miles ago. Not sure yet what to do with it, but I will spend 3 weeks in the US in July and have already scheduled 3 track days at VIR to test it.

It should be a fun street/track car. The interior needs some work and the Speedline wheels (especially the offsets) are not to my taste either, but I have a set of new BBS Magnesiums for my 993GT2 that could have the centers changed to fit this car. What do you guys think?

I also have an excellent 993TT 6 speed spare gearbox sitting in the US..maybe I should fit it in there?

I thought I would share with my Porsche brothers before letting the wifey know about it.

Here are some pics.. it is the one on the left, the other is a true 993TT.

 

Looks like a nice conversion, as the only obvious "flaw" is the missing 3rd brake light. I bet it is very light and fast. Is the suspension up to snuff as well?

 

Jean, What happened to Ed? Didn't like both cars? I agree on the wheels, the offsets just don't look right. I'm not a fan of the large rear offset which makes the car look like a Camero with drag slicks. When I did my car 964 with N/A trailing arms, I used BBS centers with a different offset to limit the amount of rear outer rim width. The result is a more normal looking offset. On my 930, I replaced the old 17" speedline replicas which ran without the 25mm factory spacer with Kinesis designed to run with the factory spacer. I just think it looks better.

You'll definately have to do some chassis modifications to fit the 6spd box into the early chassis.

 

Colin
I don't think it will ever be a very fast track car, but it should be nice to drive. Here are some of the suspension specs I got. I am not very familiar with them
- The weight is 2500lbs
- Coil-over rears, 600lb's,
- 23mm front torsion bars, 22mm front/rear weltmeister swaybars
- 934 struts, raised spindles, turbo tie rods

It also has Big Reds, so that should help.
Thanks

 

Geoffrey, thanks for the input. Ed had to back off, he had some family and business reasons, I was not going to let it slip!

It has a G50 5 speed in it, so I guess the G64 should not be a very serious job to do.? Or maybe I would end up putting my G50 6 speed sequential gearbox in it?
I could modify the case a little probably. I agree about the wheels.

 

The 6spd will protrude into the chassis by a significant margin, especially if the chassis retained the 1974 engine placement. The turbo chassis all have the engine moved to the rear slightly, between 1-2 inches. The torsion tubes will need to be cut out of the car and the rear center tunnel cut. I believe a shortened shift rod is required as well, but I cannot remember. In any case, I think the 5spd with proper gears is a better match for the engine RPM range a turbo engine operates in thatn a 6spd given the large amounts of torque available from 4-7k. With a 6spd, you are just shifting too much. I think the N/A engines that are running to 8k require the 6spd to keep the engine in its narrow powerband.

Maybe you can make it up to Watkins Glen with the car while you are here. It is an awesome turbo car track.

FWIW, I could never go back to a torsion bar chassis...

 

Geoffrey, I know that the center tunnel has been cut, don't know much more though. You know how long I have looked for a 5 speed G50 for my 993TT! I like 5 speed a lot, just trying to find some usage for my 6 spd. TT box .. Lag should be ok in this car, it has smaller turbos than my 993, so the 5spd might just be perfect. I will not know until I try it.

I will be going to WGI, my brother in law has a SCCA race there on the 22nd-23rd of July with his Radical, but don't think I will take this car..

 

Jean:

What days will you be at VIR?

I go there all the time, and I've got tons of VIR video on my site (in the signature, if that will help you out any )

Brian

 

Brian,

That would be great.. I will be going on August 4,5,6 with them.. http://www.funktionauto.com/funktion_events.asp and Summit POint on the 15-16 of July for the SCCA race as well.

Going for fun, first time tracking in the US, should be nice..Would be great if you can make it.

 

OK, Car Guys, I see. I won't be there then, unfortunately.

Brian

 

Is it bad (CarGuys), or just because timing is not right for you?

 

Timing. Car Guys is a pretty good club to run with. Generally 4 sessions per day, 25-30 minutes each.

Possibly more if the turnout is low.


Brian

 

Jean,

You proably know, but the G50 has been shortened I believe... You better send over some of those wide grins you will have when u drive it... :-) and I assume you're adding another oil cooler?... it also has the twin filter mod to my memory...

e

e

 

Ed,

Yes it has been shortened, it is a very typical modification to make them fit on these cars apparently.
The car will undergo some improvements while it is there at Protomotive , such as A/C and I also asked Todd for a couple of different maps, one for the street and another for race fuel. I will need to add an oil cooler for sure.
Thanks for pointing it out.

I will send you pictures

 

Just to make it more technical, here are some of the specs of this thing that I know of so far..

Engine: About 1500 miles from new..

- Upgraded to 3.5 Ltrs
- Garrett T-3/ Super60 Twin turbos
- Twin Tial 40mm wastegates,
- Protomotive equal length S/S headers
- Stainless custom muffler
- Protomotive intercooler
- 993TT modified injectors with Protomotive dual rate regulator
- 84-89 carrera Pressure sensing motronics
- ARP rod bolts
- Modified heads, reinforced and flameringed
- Twin Plug
- Carrera manifold
- 935 pressure plate/disk.

Gearbox:

G50 gearbox, top speed about 186mph at 7200 rpm's
Open differential
Shortened bellhousing, Steel U-joint shifter coupler.

Brakes: Big Reds, 14" rotors front 12" rotors rear.

Wheels: Speedline 10X18 front 12X18 rear
Chassis: Ground up chassis redo, stripped to bare shell, rust-proofed, re-undercoated per factory.

Weight: About 2500 lbs.

I would expect about 520 FWHP sustained from this engine, which should give a very decent power/weight ratio.