Danno

Ok, which one of those rotors weigh less (2-piece kind)?

Also which one has more offset? That is will be inset more?

Thanks <img border="0" alt="[bigbye]" title="" src="graemlins/xyxwave.gif" />

BC

I am under the impression, Danno, that the 993TT ARE the GTS rotors. There can be two piece designs for purchase, but they were not originally supplied?

I just always ask Mike at Prospeed.

Alan C.

Danno,
Not sure what you are trying to do but you should also look into the 94 3.6 turbo front rotor, 1 pc., if you need a taller hat. There isn't too much difference between the two but there is some. If I can get to my car today I'll try to measure the 2 hat heights.
Alan C.

eugene

I measured the hat height of the 993tt rotor and 3.6T rotors sometime ago.

If my memory serves me right the 993tt rotor hat was 1/8" shallower.

It was when I upgraded to Big Reds front. I had ordered a pair of 993tt rotors
but found that the hat section was slightly to shallow. Returned them for a pair
of 3.6t units.

BTW, I think that the 3.6T and 928GTS share the same rotors ?

Eugene.

Danno

Thanks guys, I think I'm going to pick the 2-piece 993TT rotor so I can get my own custom hat made to get exactly the offset I want. Now these are the ones with the cast-in holes right?

eugene

Danno.

Yes, they come with cast in holes.

Eugene.

Alan C.

Danno,

Stay away from the rotors Roger Mandeville sells. I bought a set that didn't last one hour. Thermal fatigue cracking. The guy said I broke them in wrong. Strange that the problem was limited to one small area.

I have a set of hats if you want to play with offsets. Be glad to loan them to you for trials.

Alan C.

Tom Pultz

993TT rotors are 2-piece with cast-in holes; 928 GTS rotors are 1-piece without holes. If you want 1-piece with holes use the 911 C2 3.6 Turbo rotors. I think they all weigh about the same since I've had both the 993TT and 3.6 turbo.

The 993TT rotors have 5 mm LESS offset than the 3.6 turbo. This means they can't be used on a car with M030 spindles and hubs that normally mount the S4 size rotors. They must be used on a standard car with the appropriate caliper adapters.

If you can, I'd recommend you stick with the 1-piece rotors based on my less than favorable experience with the Kokeln alloy hats and 993TT rotors.

I have pictures and info in the Brakes section of my website.

Dan Gallagher

</font><blockquote><font size="1" face="Verdana,Tahoma,Helvetica">quote:</font><hr /><font size="2" face="Verdana,Tahoma,Helvetica">Originally posted by Tom Pultz:
<strong>993TT rotors are 2-piece with cast-in holes; 928 GTS rotors are 1-piece without holes. If you want 1-piece with holes use the 911 C2 3.6 Turbo rotors. I think they all weigh about the same since I've had both the 993TT and 3.6 turbo.

The 993TT rotors have 5 mm LESS offset than the 3.6 turbo. This means they can't be used on a car with M030 spindles and hubs that normally mount the S4 size rotors. They must be used on a standard car with the appropriate caliper adapters.

If you can, I'd recommend you stick with the 1-piece rotors based on my less than favorable experience with the Kokeln alloy hats and 993TT rotors.

I have pictures and info in the Brakes section of my website.</strong></font><hr /></blockquote><font size="2" face="Verdana,Tahoma,Helvetica">What happened with the kokeln hats? your site doesnt say anything negative (maybe i missed it in my quick once over?)

Danno

Thanks for the info guys. One of my goals is to fit big brakes under my 16" wheels, thus the 12.7" rotors instead of my earlier 13.0" plan.

I just might go with the 3.6Turbo rotors for simplicity. But some weight savings with aluminum hats may be an incentive here.

Which does bring up some issues. I suspect the Kokeln problems are the same as any other hat & rotor problem using dissimilar metals: differential rates of expansion due to heating. You'd want a floating-rotor attachment here...

Russ Murphy

Danno,
What calipers are you going to use with the 12.7" rotors and 16" wheels? Will the S4's accomadate that big of a rotor with the commonly available adaptors (Racer's Edge, etc.).

Steve Lavigne

</font><blockquote><font size="1" face="Verdana,Tahoma,Helvetica">quote:</font><hr /><font size="2" face="Verdana,Tahoma,Helvetica">Originally posted by Danno:
<strong>Thanks for the info guys. One of my goals is to fit big brakes under my 16" wheels, thus the 12.7" rotors instead of my earlier 13.0" plan.</strong></font><hr /></blockquote><font size="2" face="Verdana,Tahoma,Helvetica">I'm guessing you are planning on milling a set of Big Red adapters so that the caliper sits closer to the centerline of the spindle.

Alan C.

Danno,

If you put floating rotors on a street car be prepared for noise. Just driving in the pits mine clunked enough to get people to comment that they thought something was broken in the front end.

Alan C.

Tom Pultz

Re: the Kokeln hats/993TT rotors... I am pulling them off this week to have them checked for run-out. I measured it on the car and got 0.007" on each side, which is way too much. I don't know if the hats are bad or the rotors are warped. Kokeln says they will check them if I ship them down, but I will probably do that locally. They worked fine for about 2000 miles, and then I started getting a pulsing in the brake pedal, really just out of the blue. When I spoke to Kokeln they said I am the ONLY person to ever complain. I don't really buy that. All I had was easy street miles. Something that bothers me just as much as the warped hats/rotors is shortly after I bought the hats for $500/pair, they reduced the price to $140 each. I got screwed.

ian

Why the effort to fit them under 16's? I thought you already had that monster set of 17's from BBS?

Are you planning on running some other series that you need 16's?