View Poll Results: What Wheel set should I choose
17" 993 Cup II
32
51.61%
15" or 16" Fuchs
30
48.39%
Voters: 62. You may not vote on this poll
Wheels Fuchs vs Cup II
10-18-2009, 12:15 AM
#16
i don't by the myth.... as long as you ahve the same overall rolling radius and same approximate weight 17s and 15s will make no difference to acceleration and "power"
that said the 17s will give you much less sidewall flex and allow you for a more high performance tire fitment. this will make for a stiffer ride and you will feel potholes more.
As stated tires will be cheaper for the 15s.
Ps I have 16 inch Fuchs, 16 inch BBS and 17 inch cups on my 911, the cups with the bridestone RE 050pole positions give the best turn in and high speed confidence.
that said the 17s will give you much less sidewall flex and allow you for a more high performance tire fitment. this will make for a stiffer ride and you will feel potholes more.
As stated tires will be cheaper for the 15s.
Ps I have 16 inch Fuchs, 16 inch BBS and 17 inch cups on my 911, the cups with the bridestone RE 050pole positions give the best turn in and high speed confidence.
I'm not sure about weight comparison between different porsche wheels.
10-18-2009, 12:29 AM
#17
Instructor
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i don't by the myth.... as long as you ahve the same overall rolling radius and same approximate weight 17s and 15s will make no difference to acceleration and "power"
that said the 17s will give you much less sidewall flex and allow you for a more high performance tire fitment. this will make for a stiffer ride and you will feel potholes more.
As stated tires will be cheaper for the 15s.
Ps I have 16 inch Fuchs, 16 inch BBS and 17 inch cups on my 911, the cups with the bridestone RE 050pole positions give the best turn in and high speed confidence.
that said the 17s will give you much less sidewall flex and allow you for a more high performance tire fitment. this will make for a stiffer ride and you will feel potholes more.
As stated tires will be cheaper for the 15s.
Ps I have 16 inch Fuchs, 16 inch BBS and 17 inch cups on my 911, the cups with the bridestone RE 050pole positions give the best turn in and high speed confidence.
I voted the Cup II's BTW and as I said in the other posting I kind of like the lobster claws but I love the newest Turbo Wheel out; but it only comes in 18"s and 19"s...
10-18-2009, 06:59 AM
#19
Race Director
This thread is silly, because OEM Fuchs (not custom-made 3 piece units) are simply not going to work in a desirable size on your late offset car. Yes, some will tell you that you can fit 16X7 Fuchs on there if you run with a narrow tire but frankly that's just putting looks in front of performance. You'd want 8 inch all around at least, if not 8's on the front and 9's in the back.
Unless you are planning to swap a suspension in from an 85.5 or 86 model year car, then you are stuck with late offset wheels.
For the people in this thread that are saying that there will be no performance difference for an N/A between 15/16/17 inch wheels, they are (respectfully) wrong. You CAN really notice the difference in accelleration and handling when you switch between wheels of different weights. The N/A cars lose their handling purity when they have large heavy wheels on them.
Unless you are planning to swap a suspension in from an 85.5 or 86 model year car, then you are stuck with late offset wheels.
For the people in this thread that are saying that there will be no performance difference for an N/A between 15/16/17 inch wheels, they are (respectfully) wrong. You CAN really notice the difference in accelleration and handling when you switch between wheels of different weights. The N/A cars lose their handling purity when they have large heavy wheels on them.
10-18-2009, 11:22 AM
#20
Three Wheelin'
Thread Starter
Does anyone have the answer to why Porsche changed the offset of the 944 in 87 ? I mean 86 and 87 are almost identical in all other things right ?
10-18-2009, 12:09 PM
#21
For the people in this thread that are saying that there will be no performance difference for an N/A between 15/16/17 inch wheels, they are (respectfully) wrong. You CAN really notice the difference in accelleration and handling when you switch between wheels of different weights. The N/A cars lose their handling purity when they have large heavy wheels on them.
Doesnt widening the stance via spacers + using wider/better tires improve handling? Maybe it's just the quality of rubber I switched to in the process. Anyway, I like my Cup II's better than my 15" dials....even if in reality, it's just an aesthetic placebo.
10-18-2009, 03:38 PM
#25
Rennlist Member
This "myth" thing has been discussed ad nauseum, proved/disproved, etc.
It's still surprising how few people actually understand it.
"as long as you ahve the same overall rolling radius and same approximate weight 17s and 15s will make no difference to acceleration and "power" "
Find me 17" rims that weigh the same as Fuch 15" rims and I'll show you an extremely expensive wheel.
1) You're talking about 7-10lbs of difference per wheel.
2) The difference isn't in power. The difference is unsprung mass and that impacts ride/handling.
3) That's a lot more noticeable on the street when you hit a pothole than on the track where the worst disturbance you'll come across are rounded gator backs. It's also a lot more noticeable if you've got worn suspension. Increase in unsprung mass makes the suspension work a lot harder. Worn shocks and bushings will be a lot more challenged to handle that then new components.
4) If you're the type of person who would notice the difference in ride between 30psi and 40psi in your tires, you'll notice that kind of increase in unsprung mass no matter how new your shocks are.
It's still surprising how few people actually understand it.
"as long as you ahve the same overall rolling radius and same approximate weight 17s and 15s will make no difference to acceleration and "power" "
Find me 17" rims that weigh the same as Fuch 15" rims and I'll show you an extremely expensive wheel.
1) You're talking about 7-10lbs of difference per wheel.
2) The difference isn't in power. The difference is unsprung mass and that impacts ride/handling.
3) That's a lot more noticeable on the street when you hit a pothole than on the track where the worst disturbance you'll come across are rounded gator backs. It's also a lot more noticeable if you've got worn suspension. Increase in unsprung mass makes the suspension work a lot harder. Worn shocks and bushings will be a lot more challenged to handle that then new components.
4) If you're the type of person who would notice the difference in ride between 30psi and 40psi in your tires, you'll notice that kind of increase in unsprung mass no matter how new your shocks are.
10-18-2009, 03:58 PM
#26
Three Wheelin'
My 1986 turbo brake rotar and stud hub mount differently than a 1987 or newer. If you purchased an OEM fuch 15 or 16 wheel, they will push out around 1 inch from your fenders. I doubt that is the look you are looking for....
I just mounted 2 17" 996/986 wheels on my 1986 951 and i used a 1'' spacer.
If you bought custom wheels.... your going to PAY big $$$$. There is custom wheels with fuch faces used on 911's. So i would assume they have the offset you need.
Most folks want the later year offset. Like me....
Good luck
jpc
I just mounted 2 17" 996/986 wheels on my 1986 951 and i used a 1'' spacer.
If you bought custom wheels.... your going to PAY big $$$$. There is custom wheels with fuch faces used on 911's. So i would assume they have the offset you need.
Most folks want the later year offset. Like me....
Good luck
jpc
10-18-2009, 07:56 PM
#29
Three Wheelin'
Thread Starter
Ok Guys I found some pictures of a 1989 944 with the Fuchs. Tell me what you think. It appears the tire is sticking out in the rear or very close to it. I cannot tell what size they are though. I think they look good.
http://autolivery.com/assets/cars/KN450888-2sm.jpg
http://autolivery.com/assets/cars/KN450888-16sm.jpg
http://autolivery.com/assets/cars/KN450888-10sm.jpg
http://autolivery.com/assets/cars/KN450888-11sm.jpg
http://autolivery.com/assets/cars/KN450888-2sm.jpg
http://autolivery.com/assets/cars/KN450888-16sm.jpg
http://autolivery.com/assets/cars/KN450888-10sm.jpg
http://autolivery.com/assets/cars/KN450888-11sm.jpg