George:
I'm glad to read that your 928 is stable at the speeds you mentioned. However, as a few who have driven on German autobahns or Italian autostratas can tell you, so are stock 928s set to the factory recommended ride height.

Back in 1986, the late Al Holbert set the fastest production car land speed record at the Boneville Salt Flats in a 1987 928 S4, at the factory recommended ride height. His speed was over 171 MPH. YMMV.

 

</font><blockquote><font size="1" face="Verdana,Tahoma,Helvetica">quote:</font><hr /><font size="2" face="Verdana,Tahoma,Helvetica">Originally posted by Seth W:
<strong>...correct me if I'm wrong here, but with a 52MM offset on an 8inch front rim these wheels are 8mm further towards the fender than my 89 GT?? (8inch wheels with 60mm offset) Is that kosher?
</strong></font><hr /></blockquote><font size="2" face="Verdana,Tahoma,Helvetica">As we sit at the keyboard it's easy to fret over a few milimeters. It's also important to maintain some perspective. That 8mm that you are shifting the tire is 5/16", about the thickmess of a pencil. Some are pretty **** about that difference, some of us somehow manage to get by with the bastard 55mm offset wheels and the 5/16" that they move toward the front fender lip. Your choice of tire --brands-- probably makes a bigger difference in tire-to-fender clearance.

My two sense.

 

The Boneville Salt Flats car was NOT set to a factory ride height. I have personally seen the video, and that car is sitting SUPER low.

 

I also have the video. It's set within the factory recommended ride height range.

Moreover, the folks driving on the autobahns in their 928s aren't lowering their cars either. Seems that they're stable enough to be driven near the top end of their speed range for as long as conditions allow.

I don't doubt that lowering a 928 increases its stablility. I'm just saying that 928s are already stable at the speeds they can be driven here and on the autobahns and autostratas. YMMV.

 

Ed,

Again, thank you for your concern for my engine,
but I will stay with my current set up. As for
all the 928s that drive the autobahns, I would
not presume to know what there ride height is, or
how stable they are at 165. I do know that not all
928s here in the USA are stable at speeds over 150,
whether it's because of tire condition, alignment,
suspension setup, ride height, or any number of
other factors. But if asked, I will offer suggestions,
and I hope that I don't convey the perception that
my point of view was the only correct one.

 

</font><blockquote><font size="1" face="Verdana,Tahoma,Helvetica">quote:</font><hr /><font size="2" face="Verdana,Tahoma,Helvetica">Originally posted by dshulik:
<strong>Man those are nice! I wish I'd bought a set of those instead of my 18 inch turbo twists. The only thing I'd do if that was my car is change the mirrors to the more aerodynamic later model ones and that car is finished! Thats about as nice as they come. Also looks nicer than most 996's..very sweet indeed, enjoy!</strong></font><hr /></blockquote><font size="2" face="Verdana,Tahoma,Helvetica">Thanks man! Cup mirrors already in paintshop.
</font><blockquote><font size="1" face="Verdana,Tahoma,Helvetica">quote:</font><hr /><font size="2" face="Verdana,Tahoma,Helvetica">Originally posted by DavidH:
<strong>Fredis GT,

Simply, beautiful!

How does the ride feel(firm?)compared to your previous set of wheels.

David
1989 928 S4</strong></font><hr /></blockquote><font size="2" face="Verdana,Tahoma,Helvetica">The ride feel compared to Design 90 16" wheels is very good (not firm) specially in turns.
</font><blockquote><font size="1" face="Verdana,Tahoma,Helvetica">quote:</font><hr /><font size="2" face="Verdana,Tahoma,Helvetica">Originally posted by Erik - Denmark:
<strong>Fredi,
Good pictures ..........and nice wheels!
<img border="0" alt="[byebye]" title="" src="graemlins/wave.gif" /> </strong></font><hr /></blockquote><font size="2" face="Verdana,Tahoma,Helvetica"> <img border="0" alt="[bigbye]" title="" src="graemlins/xyxwave.gif" />
</font><blockquote><font size="1" face="Verdana,Tahoma,Helvetica">quote:</font><hr /><font size="2" face="Verdana,Tahoma,Helvetica">Originally posted by Seth W:
<strong>Ed, and others, correct me if I'm wrong here, but with a 52MM offset on an 8inch front rim these wheels are 8mm further towards the fender than my 89 GT?? (8inch wheels with 60mm offset) Is that kosher?

I think the wheels look great, I'm just trying to get all the fitment info I can so no insult intended Fredis.</strong></font><hr /></blockquote><font size="2" face="Verdana,Tahoma,Helvetica">My front wheels are 8,5" and I have no problems with rubbing.
<img border="0" alt="[burnout]" title="" src="graemlins/burnout.gif" /> <img border="0" alt="[burnout]" title="" src="graemlins/burnout.gif" />

 

George:
I never said my opinion was the correct one either. However, I do know of several 928 owners who had lowered their cars and (when presented with a huge engine repair bill) wished they had not. YMMV.

 

Hey Ed!

Is your ride height set for 55 or 65mph

just stirring the ride height pot <img border="0" alt="[icon501]" title="" src="graemlins/icon501.gif" />
<img border="0" alt="[cheers]" title="" src="graemlins/beerchug.gif" />

 

Fredi,
that is so good looking, one of the better looking set of wheels I have ever seen on a shark!
And with the cup mirrors back from the paint shop...

 

Another reason to get a belly pan!

Defense against road damage!

Although it seems like my frame rails take most of the scrapes...

 

Fredis, Those are NICE wheels. - Ruf

 

Sorry all for interrupting this thread again,
but here is comparison between my car and the
Holbert car on the Salt Flats (from the video).
Assuming the Holbert car had 16 inch wheels, I
think it looks like it's riding a little lower
then mine, but then again it's hard to see a
20-30mm difference at this resolution.

<img src="http://sis125.berkeley.edu/928/pictures/holbert-jorj7.jpg" alt=" - " />

Of course, YVMV.

(And I do use the DEVEK Aluminum Belly Pan)

 

Hard to tell. Even so, it does appear to be lower.

Nonetheless, 928 owners in Europe (especially Italy and Germany) drive their cars at speeds near the car's upper limits, yet their cars are not lowered. If they were lowered, they could only be driven on autobahns and autostratas. Once on city streets, those lowered 928s would be scraping the coblestones. Can you say "new engine block?" :^(

BTW, I've had my GT to 155 and I thought it was pretty stable. Too bad turn 1 came up when it did, or I'd have gone faster. ;^) YMMV.

 

With an offset like 52mm that car must tram track quite badly on rutted roads. I know mine does and I removed the lever effect by making custom control arms. The lever effect for those who may not be familiar is the lever point is further from the pivet as the wheel has a smaller negative offset. Of course with this setup there is no danger of the tyres rubbing on the lip.

My custom arms do change the scrub radius, less negative offset equals more steering feedback. There is no question that my car has more sensitivity and feel in the steering with 50mm offset wheels. The high negative offset may have been devised to give the 928 a less nervious feel. It's a cruiser after all. Well that's what Porsche thinks it is anyway.

All race cars run the scrub radius increased where possible in relation to the equivalent street cars. They need to know where the limit before they find out by spinning off. <img border="0" alt="[burnout]" title="" src="graemlins/burnout.gif" />