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if we need to have a couple of offsets. it will not kill the project.

catching up on thread reading :)

-sd

I have Lyndseys 5.5" backspace up front on 17x9 and 7" on back on 17x11 with original spacers on the 930 = no problems at all.

I think that's our first 11" to make.

That is what you need to use.

I have had many different 930 wheels on my 911 widebody, from 15" to 18". They all have that offset in the 9&11 widths and fit a stock 930.

The width and offset needs to be the same no matter what car is using the wheels. It should be up to the owner to adapt their car to this standard. You will get yourself into a mess trying to fit every configuration and tire size. Set the standard and sell spacer and stud kits for the rear.

Just curious, how thick is the factory rear spacer?

Cheers

Early 930 is 2", I have heard the 965 is different due to rear suspension but have not seen it for myself.

Thanks!

Mine came with 28mm on the rear and 22mm up front. I ended up swaping them, and works better for me.

The front before '81, 930.341.611.00 was definitely 21mm.

the rear one used for all '75 -89 is 930.341.611.04, 28mm is about right but it would be nice to get some other feedback, exact measurement is difficult to get.

I have heard abot the ~2" ones but never seen them.

+1 and I couldn't agree more. It would be nice to have a good forged center to use and then any wheel width/backspace combo could be assembled using off-the-shelf wheel halves. Honestly, I would think that is the best idea. I have been shy to buy the Lindsey's because they use stock wheel centers which still have cracking issues, and essentially the high price derives from the cost of the wheel they buy to cut down.

I think this would be a good business opportunity for you guys as well - essentially undersell every 3pc hacked up Fuch out there and make a decent profit at the same time. Honestly, I was starting down the path to have centers done in either China or Australia but I just simply do not have personal time to do this and maintain my regular job.

I need 16" diam for mine to work with the specific race tires I want to buy. Might be a way to make a center similar to the 16" Fuch and can use with either 16" halves or the 17" halves Lindsey (and others) use. I didn't get that far in my search...

I don't have time to wait for this option so I am buying Kodiaks, but if you had a 16" 3pc option you could charge about the same $2K and clearly make money and I would have bought a set for sure. I luv the look of the Fuchs but won't pay for it and then have a center crack anyway...

Never seen a 2" spacer from factory, but if use it implies that the studs would be very long and consequently take a lot of punishment... prompt to failure?

Subscribed, with an inspirational photo:

http://forums.pelicanparts.com/uploa...1171949389.jpg

I like the new exhaust tips Jack, I had gotten used to the black out look but this is cool too. Was this a result of your trip to run Laguna?

My exhaust outlets have always been raw aluminized steel (at least, since I got rid of the B&B muffler and the stainless tips). They get darker with time, but only the muffler and inlet pipes are painted.

They're fresher in this picture, I think, because they had to be replaced after this happened at Sears Point.

dude I remember that post, man that sux. I designed my tips based on yours, they are stainless but not sure how bright they will stay. since I did 1300 miles last weekend they've gotten a bit darker

http://forums.pelicanparts.com/porsche-911-technical-forum/342370-my-trip-see-911teos-beast.html?highlight=911teo

I wouldn't be too concerned with stud failure using long studs. There has been a big discussion before about this on the racing forum, but essentially there is a lot of "joint stiffness" by having 5 large studs, in a pattern, and a high torque value so the fastener itself carries less load than the joint - engineer speak of course but "don't worry" is my short answer with spacers and longer studs. There are some serious cars with big flares running the spacers in the 3"+ range because they are using wheels with tons of backspacing instead of getting the right wheel made.

I would only worry in the case of pure shear at high loads like drag racing with slicks. The shock of launch breaks off studs and that is why most of your 10sec and faster cars start running 5/8" diam studs. In road racing, you usually don't create that kind of launch or shock... instead you leave the guy waving you on the track fast but not "launching" - at least you shouldn't as it would be a bit disrepectful and possibly scary for the flag guy standing down there waving you on.

I am ordering custom wheels with about an inch of additional backspacing so I can mess with track widths and such with spacers for instance - for additional tuning on the car.

I have several stock 930 rear spacers in the garage. They are all 50mm, don't know what year(s) they were used on. None of my Porsche manuals reference the spacer sizes used on the 930. Does anyone have such factory information?

As for long studs and spacers, they are very very stout when bolted together. Much better than using adapters in my opinion. I've ran that setup on 2 different cars for 15 years with no issues.

Quote from Bill V. "The front before '81, 930.341.611.00 was definitely 21mm.

the rear one used for all '75 -89 is 930.341.611.04, 28mm is about right but it would be nice to get some other feedback, exact measurement is difficult to get."

Three experiences with 78 - 79 930s which all had 21mm front and 28mm rear spacers.

Thats perfect