Shawn, your car is sweet!

Yeah, like you say, it's pretty much like lego parts, you just grab up what you can from here and there, from this or that model, and piece it together to make a frankencar, and in your case your frankencar was made to look (inside and out) like a factory turbo S. Thankfully I have been lucky finding a lot of the parts I need to do something similar.

But I was just wondering if there was a way to see all those special limited parts the factory used on the real cars. I'm not interested in buying or using any of those parts, I just wanted to learn and know about them. Like it would be interesting to see just how much of a turbo S is regular 968 parts, how much comes straight from a 951, and how much is new for that car? It's all those "new for that car" parts that we replace with parts like the 2.7 head and aftermarket stuff.

 

Yes it would be nice, there are those that say there is a parts bulletin for these part #'s. Similar to the plane paper sheets that the 951 cup cars have. As I have a few different ones like Rothmans series's etc...

Since these cars were Parts Bin Cars as Porsche built them with an array of what they had already and the motorsports team engineered the rest like the special pistons, had the 2.7 head modified like the 951's, had the chassis of a preproduction 968 redone in the front to fit the intercooler in there! Installed a 951 wiring harness! The fact that they were going to build up to 100 of them but failed to get them off the ground means that they probably had some literature on them like manuals and factory paperwork!

 

Boost wrote: "had the chassis of a preproduction 968 redone in the front to fit the intercooler in there!"
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I'm a little confused by this comment. When we built my TS replica, we didn't have to change much of anything to fit the intercooler. We did run into a bit of a problem how to secure the hood using the stock method...maybe that's what you're referring to? Our solution was to go with hood pins; but, I've seen other approaches that allow the hood to be opened from inside the car, like the stock method.

 

I'm a little confused by this comment. When we built my TS replica, we didn't have to change much of anything to fit the intercooler. We did run into a bit of a problem how to secure the hood using the stock method...maybe that's what you're referring to? Our solution was to go with hood pins; but, I've seen other approaches that allow the hood to be opened from inside the car, like the stock method.

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Well you see Porsche doesnt just duct tape and bailing wire a hood on a factory street car! So they did it the only way an engineer would build a car! They modified the front of the chassis to not only have the intercooler bolt in there perfect with mounting points they also clearanced the radiator for the air ducts to supply air through it all safely at 180 MPH! Of course you also have to have the hood latch using dual latches with one safety catch! Here is what I did to my car to have the latches work perfectly just as this factory car here in the first 2 pics!

 

So...... There are no factory manuals, or schematics? Nothing officially outlining the changes made? Id like to do one 100% stock clone, with a little extra power, maybe different turbo, injectors,maf, etc. From what Im gathering, the pistons/rods, and the intercooler were one-offs? Or the IC was from 951, but with chassis mods? I need to start getting a list of all these things I need. I have an extra 951 to work with. I would like to do as close to stock as possible, regardless of cost of parts.

boost feen: Are you pushin 400 with the stock KKK, injectors, maf, etc?

 

The head was a modified 2.7 8 valve head with ceramic exhaust ports and different exhaust valves much like the stock 951 head.

There is a factory data sheet on the other 968 forum outlining most of the specs and some option codes, unfortunately it is in German.

 

Has anyone customized the 2.7 with ceramic exhaust ports, and valves?
Hmmmm, guess need to find someone fluent in german to translate. What about exhaust, WG, and manifold? Which 968 forum has the data sheet? 968.net?

 

There were lots of 1 off parts and lots of parts from 951. Your best bet is to speak to people who have actually done it successfully. You don't need the 1 off parts if they are even available. There are a few people on rennlist. Boostfeen, Kasturbo just to name a few..
BTW, intercooler is standard 951. Head is unique.
Regards.
Raj

 

I have a parts list that came with my car(in German) of the parts used on the Turbo S and the Turbo RS. I'll try to compile it at some point.

 

Jason:

I'd appreciate that. My brother-in-law speaks German and would be able to translate for me.

 

Sent you a PM.

 

 

My 968 turbo S clone is as close as it comes really with the exception of the power sunroof and electric windows! However as stated before I felt that there have been a lot of advances in turbocharger engineering so I went with not only a little larger unit but brand new! It still is a water cooled unit because I felt underhood temps are important and wanted the electric water pump in there to keep a stock look!
Here is a parts list may have left out a few things but these parts were all purchased by me over about a 1 1/2 year period and I tore the 968 apart and put it back together in this configuration in about 8 months!

Engine

968 104 MM shortblock w/ new seals, sensors and gaskets
stock lightweight 968 crankshaft
new rod bearings
lightend 951 rods w/ new bushings
8.7 to 1 compression new ARIAS pistons
these are MAHLE replica's that Tom Charelsworth speced out
2.7 cylinder head w/951 exhaust valves and all springs
951 intake ported and matched to oval port big valved head
wide fire headgasket
stock 951 cam & lifters
spring loaded timing tensioner
New water pump, belts & rollers
lightweight 951 aluminum flywheel
SPEC heavy duty pressure plate 500 ft lb's
SPEC 6 puck kevlar sprung clutch
turbo S torque tube
951 computer set with custom mapped chips
72 lb injectors
new 951 fuel pump
adjustable fuel pressure regulator
new 951 turbo S fuel lines
new 951 aux. water pump
951 wiring harness
all 951 water cooling & oiling just as factory cars
Lindsey stage II intercooler
Lindsey super 61 #10 hotside turbocharger
Dual port wastegate w/adjustable boost **** in glovebox
stock 951 1 piece crossover pipe heat wrapped
B&B stainless 951 headers heat wrapped
turbo has insulation jacket as well as downpipe
3" downpipe - 3" - 4" exhaust w/stainless BORLA mufflernew 951 coolant tank

Transaxle, suspension, brakes

6 speed transaxle w/ ZF clutch type limited slip differential
new 993 TT front brake calipers
new 993 TT front pads
M030 front KONI struts w/ club sport springs
Rear threaded body adjustable KONI shocks w/951 cup springs
968 M030 sway bars 30MM front, 19MM adjustable rear
new 951 coolant tank
new 965 front brake rotors
new 5/33 brake bias valve
super blue brake fluid
new rear crossdrilled 968 CS rotors & pads
new factory 18" Speedline for Porsche rims
new Dunlop ZR compound tires

Interior

Recaro 968 CS composite seats paint matched
new RS america red belts
4 point roll cage
Carbon fiber dashboard
airbag delete
new 968 CS steering wheel
new 968 CS center console
leather wheel and shiftboot has custom matched blue stitching
new ( Porsche turbo S ) script floor mats
VDO boost gauge and Air Fuel ratio in gauge pod on windshield trim
Rear seat delete


Exterior

3 piece turbo S adjustable rear wing
european rear bumper cover
front turbo S splitter
front turbo S bumper cover with larger intercooler opening
dual hood latch hood with NACA ducts drivers side feeds airbox
RS 2 piece intercooler vent to feed air through intercooler
european front turn signals

 

OK, so maybe not 100%, key word was MAYBE, turbo, maf, injectors.

 

I can appreciate the desire to make a perfect replica, but there are two problems I see:

1. The factory parts are NLA and even if you get resourceful and use solutions like the 2.7 head, it still won't be a perfect replica.

2. The factory designed the 968 turbo S and RS with many restrictions in place. If race rules didn't restrict their design, the car may have turned out differently. The way I see it, the only reason to build a perfect clone is to be a collector's item or for historic/enthusiastic value. Otherwise, what boost feen did is ideal; he used the turbo S as a basis, and used current technology along with some personalized tuning to make something that looks like a clone on the surface but is much more advanced and much more suited to the needs of the owner.