Slightly confused...

[Buddy]

I always thought the S was the 16 valve version of the 944 and the Turbo S was a turbo 16 valve. Is this correct?

I've always been able to identify the S from the wider cam tower. But I saw a picture of the engine in a turbo S and it had what looked like the narrower cam tower cover of the 2.5 liter motor.

Someone can clarify, I'd appreciate it.

Thanks

[carsonmx114]

i think the s on the turbo s means upgraded suspension and a larger turbo. i'm sure there is more but the engine is a 8v, the s had about 250 horses and the standard had 217 i'm not mistaken.

[AaronM]

Originally posted by carsonmx114
i think the s on the turbo s means upgraded suspension and a larger turbo. i'm sure there is more but the engine is a 8v, the s had about 250 horses and the standard had 217 i'm not mistaken.

Yup, Turbo S was a turbo with a larger turbine (same size compressor wheel) and various suspension tweeks plus an optioned-out interior.

IIRC the S had 247hp (factory rating) and the "normal" turbo had 217.

[nize]

from;
http://www.clarks-garage.com/951faq.htm#models

In 1988½ Porsche introduced a new 944 Turbo which was designated as a 944 Turbo S. The first example of the 944 Turbo S were a limited production run. Exact numbers on the limited production 951 S cars varies, but seem to be between 750 and 1000. All of the limited production vehicles came with a Silver Rose Metallic exterior and burgundy plaid cloth interior.

The Turbo S received the M 44.52 engine as opposed to the M 44.51 engine of the earlier models. The engine itself remained essentially unchanged from the early 1988 models. However, the turbocharger was changed to a K-26#8. The Turbo S was electronically limited to the same maximum boost (1.75 bar) as the early 944 Turbos. Also both models achieve maximum boost at approximately 3000 rpm. However, the K-26#8 turbocharger was capable of maintaining maximum boost until 5800 rpm while the boost on the early turbos would decrease from 1.75 bar at 3000 rpm to 1.52 bar at 5800 rpm. This resulted in a 30 hp increase in peak horsepower and a 15 ft-lb. Increase in peak torque.

The Turbo S transaxle came standard with a limited slip differential. However, there were improvements to the differential over previous models. The Turbo S differentials have inner plates which are 2.5 mm thick as opposed to 2.0 mm on earlier models. This required the two differential thrust rings to be made 0.5 mm thinner for the same overall thickness. Also, the inner plate and differential shafts are molybdenum coated for additional hardness. The clutch had a two-stage torsional spring damper with the friction material being bonded and riveted to the clutch disc instead of just rivets on earlier models.

The wheels on the Turbos were milled forged 7J x 16 in front and 9J x 16 in the rear (52.3 mm offset). The tires were 225/50 VR 16s in front and 245/45 VR 16s in the rear. The M 030 suspension package was standard equipment on the Turbo S models as well as ABS.

With the M030 option, height adjustable Koni yellow struts were added. Also with the M030 option, the strut bearings have a harder rubber compound than earlier models which can be identified by a green stripe on the underside of the bearing. The spring rate for all 944 Turbos not equipped with the M030 option is 21.8 N/mm with an unsprung length of 251 mm (through the end of the '88 MY). The M030 option springs have a rate of 28 N/mm with an unsprung length of 220 mm.

With the M030 option, the Koni yellow shock absorbers will have two white dots offset by 180°. Also with the M030 option, the torsion bar size was increased to 25.5 mm.

[Buddy]

Thanks guys. Much clearer now.

Now I have to go clarify that to a couple friends who I gave the wrong info to.

Appreciate the help.

[Tapage]

in summary, if you see a Turbo S model .. buy it .. !

[A81Sturmer]

There were no 16V factory turbos 944's. (Is that a challenge for someone? ) 944 S & S2 were 16V, non-turbo. :^)

[blodstrupmoen]

In 1981 porsche buildt the 944 GTP for the 1981 le-mans, It`s a 16-Valve variation of the 944 Engine. Like the later introduced Porsche 944 S(2). This Engine is quite special, because it is the only Porsche inline 4-Cylinder 16-valve turbo Engine ever made. Even the later indroduced Porsche 968 RS (turbo) was an 8-valve Engine.

[Tapage]

It was a production car . ? GTP .. or only for le mans .. ?

[A81Sturmer]

Well done Jedi blodstrupmoen. And thanks for the info. Off topic - I saw one of those 8v motors, that you mentioned, for sale about a week ago. I'm considering it, though I have no idea on the price. I'm still trying to decide what way to go with my 944 adventure. Right now it's a clapped out but decent cosmettically 88 non-abs 951 that I've invested a total of $3K in over the last 3 years. I'm thinking 968 M030 suspension, brakes, 6sp LSD and 350hp, based on all porsche parts, to keep it stealthy, and bulletproof. Or maybe I just convert it to 88S/89 spec (less abs) with 300 hp chips/bolt, for now. I'll probably open another topic on that eventually. Thanks again for the correction on the 16V Turbo. Good stuff.

[blodstrupmoen]

Originally posted by Tapage
It was a production car . ? GTP .. or only for le mans .. ?

GTP is a prototype car..

"This is the race car version of the 944. It raced in the 1981 24 Hours of LeMans and finished 7th overall, a quite credible showing for a new engine. Do keep in mind that this LeMans showing of the 944 was 2 years (in 1981) before the 944 car was even offered for sale (in 1983).

The GTP was powered by a 16-Valve variation of the 944 Engine which was then turbocharged, and the end result was an astounding 420RWHP ++ ( I`ve read somwhere 600hp )
. In addition to 7th place, the GTP spent just 56 minutes in the pits the whole race, the least time of any entrant. "

[Tapage]

Originally posted by blodstrupmoen
GTP is a prototype car..

"This is the race car version of the 944. It raced in the 1981 24 Hours of LeMans and finished 7th overall, a quite credible showing for a new engine. Do keep in mind that this LeMans showing of the 944 was 2 years (in 1981) before the 944 car was even offered for sale (in 1983).

The GTP was powered by a 16-Valve variation of the 944 Engine which was then turbocharged, and the end result was an astounding 420RWHP ++ ( I`ve read somwhere 600hp )
. In addition to 7th place, the GTP spent just 56 minutes in the pits the whole race, the least time of any entrant. "

thanks men .. what a beauty pic .. !!!!

[Dougster]

Yes, a real beauty!

[AaronM]

Originally posted by blodstrupmoen
GTP is a prototype car..

"This is the race car version of the 944. It raced in the 1981 24 Hours of LeMans and finished 7th overall, a quite credible showing for a new engine. Do keep in mind that this LeMans showing of the 944 was 2 years (in 1981) before the 944 car was even offered for sale (in 1983).

The GTP was powered by a 16-Valve variation of the 944 Engine which was then turbocharged, and the end result was an astounding 420RWHP ++ ( I`ve read somwhere 600hp )
. In addition to 7th place, the GTP spent just 56 minutes in the pits the whole race, the least time of any entrant. "

Interesting, I've always seen that car called a 924 GTP.

[blodstrupmoen]

Interesting, I've always seen that car called a 924 GTP

In 81, the 924 had been in production for six years allready..

Maybe it`s the 924GTR you have seen ? I think there is a boss styled 924GTR somewhere aswell..

[AaronM]

Originally posted by blodstrupmoen
In 81, the 924 had been in production for six years allready..

Maybe it`s the 924GTR you have seen ? I think there is a boss styled 924GTR somewhere aswell..

I am well aware that the 924 first came on the market in 1976. (Which makes 1981 the 5th year of production, not the 6th, but who's counting.)

There were 924GTP models as well. Strictly factory racing models (4 produced) to race at LeMans. Variants of the 924 GTS.

http://www.cantonia.com/924_carrera_gts.html