Ok, I have resolved that the 18x11et52 BSA wheels will fit on my narrow body, as for the front id like to go with 18x9s, they offer the offsets of 20/35/45/62. Another option is the 18x8 in 18/35/50. Will any of the 9s fit or am I stuck with the 8/et50?

 

What makes you think that they will fit on a n/b 993?

here you can see how some different wheels fit in a n/b rear wheelwell, notice the 11's? ET 67 is the most comfortable fit, ET62 slightly less so, ET52 will sit 10mm further ouboard

 

"David in LA" told me that was what he was running, they offer 45/52/65 for the 11s. Whould I be better off with the et65?

 

Yes, I have issues w/ 10" ET52 on my car at Cupo car height, the 265/35 tire can kiss the lip on whoops. An 11 w/ +65 would split the difference between the +62 and +67, I would still feel most comfortable w/ a +67 11.

I also have Speedline +52 9s on the front of my car w/ no issues, but if I can find +52 8x18 Speedlines I would want to go w/ that wheel.

 

Bill, so can i get away with the et45 '9s or am I gonna have to use the et50 '8s for the front?

 

Here's the diagram for the front


All of this info is at My rennlist site

as the ET goes down the edges of the wheel move outboard, as the wheel width goes up the ET must go down to compensate.

My car is at Cup height w/ +52 9s, +45 9s will sit 7mm further outboard, it wouldn't work on my car, at a higher ride height, maybe, depending on the height and tire.

JMO, but Unless you are racing it's not worth the trouble to try to fit 9 & 11