JE928Sx4.

Or, as my friends tell me, it's an indication that a visit to the "funny farm" is required.

Regards,
JE
928S x 4 (83 AT, 83 5-Spd, 86 AT, 86.5 AT (for sale))
928S4 x 1 (88 5-Spd)

Shane

In my case to have one with an automatic tranny and one with a 5sp. I might also add that two might not be enough either. A person can get addicted to these cars, and want to add a GT or GTS to the collection also. I could see having different model Porsche but the other models wouldn't get driven much!

JE928Sx4.

In Europe all 1986 928S were delivered with an S4 Suspension and brakes. The engine choice was an option as the the car could be delivered with either the 300HP 16V engine, or the 288HP 32V engine with the monster intake AND a catylitic converter.

Regards,
JE

ViribusUnits

Oh, OK. That explains that. The US car do have the same intake though. They're all the 32v 5.0s witht eh organ pipe intake.

Why would anyone want the 32valve engine in Europe? Were there any emissions porblems or something?

Don Carter

Another difference between the 85-86 cars and the S4's noone has mentioned, fewer brain failures and thrust bearing failures? I could be wrong, but I've gotten the impression that the s4 has more problems in these areas.

JE928Sx4.

People were starting to be concerned about the Black Forrest blight caused by leaded gas I guess. I don't think the small drop in HP has much effect on top end speed when crusing the Autobahn in the unlimited sections. Most of the 86 I've seen in Europe did have the 16V engines, but I've seen a few with the "organ pipe" intake and it was explained to me that it was because the car cam from the factory with a CAT and thus a 32V engine. Perhaps the CAT robs more HP from the 16V engine? I'm not an engineer or engine wiz.

Regards,
JE

JE928Sx4.

Thrust bearing failure is the result of the car's torque tube having been worked on and improper pre-load procedures. I have heard that Thrust bearing failure has been seen on earlier cars as well. Check the 928 mail list history, that is where I recall seeing this. I think it was Jim Bailey knows some history on this subject.

Regards,
JE

Bernie

From what I have heard, Pre S4 cars do not suffer from the dreaded thrust bearing failure?
I may be wrong but I think it affects S4 cars onward.

Oh and yes, the chipsets really make a difference on the "Original" 32V engines.....

JE928Sx4.

Not true. It's been seen on earlier cars.

Bernie

Anyone?

mspiegle

wow, it seems that minus a couple items, the 86.5 is pretty desireable...

-head studs
-hotter cams
-10.1:1 compression

the compression might not be much since all these talks about inaccurate compression - but still nice.

The only thing that seriously bugs me is the need for knock sensing on the 86.5

JE928Sx4.

Want to buy one?

http://members.rennlist.com/jeifert/goldcar.html

Regards,
JE

JE928Sx4.

Why wouldn't it happen on an earlier car? Same transmission, same torque tube, same couplings. Same basic design from the block/crank all the way back to the differential. The only difference is HP output. Output on the 85 and 86 cars is only slightly less than the S4. Improperly load up the thrust bearing with the 238HP of the early US 928S cars, and over time you are still going to get the same failure. It just might take longer.

Bernie

Your reasoning sounds valid but that's not an example of a failure. I just want to hear from one pre S4 owner that has had a thrust bearing failure.

JE928Sx4.

At Frenzy V Earl Gilstrom gave a presentation about Thrust bearing failure. I did a search on the Rennlist mail list and found where Jim Komiak reported on this and It was stated that 85 and on cars were susceptible to the failure. That no known reports of TBF are known for 78 - 84 MY 928.