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Originally Posted by Larry N Johnson
greg,
Out of curiousity, are the 17's Vintage pin drive? If so, did you order adapters, too? It is my understanding that the Vintage pins are a different size than the Trigo pins (used on earlier SPF's). Let us know what's up on the interchange.
Also, track tires want to be soft for more grip. Why do you want harder compound?
Good subject, thanks for posting.
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I've not yet received my 17s from Vintage yet. They should be here Monday.
I have already purchased a second set of 15s for my rear 325/50 15 MT ET street drag radials. They came from Vintage. His information was exact and service was perfect. The original wheel back space from Superformance is 3.6 inches for the 9.5 wide by 15 tall wheel. I ordered my new 15 inch tall 9.5 wide rears from Vintage with 4 inch backspace. The wheels from Superformance and Vintage are identical in appearance from an outward view, and I mean identical down to the same sheen on the metal and castings inside the wheel. Looking at the castings on the interior I'd say it's likely they are made at the same place. From an inside view of the wheel there's an obvious difference in the back space of .4 inches. This additional back space dimension is gathered by having the mounting surface of the wheel simply .4 removed. In this the depth of the pin hole on the wheel has slightly less depth. The pins which came from Superformacne needed to be reduced in length slightly. Vintage included a detailed note with the wheels that this condition may exist. The wheels from Vintage also have a second set of holes for a different offset pin dimension.
I shopped around for the 17s as an apartment manager on a budget might like to balance service, convenience and value. I think we all like to support local business, and I really do because the local crowd is a nice bunch, but the price difference is just so silly different by 2000 dollars I had to go with Vintage and buy the 17s for 1440 dollars shipped. The Yokohama Advan a032r hard compound set up I plan to use is 315/35 17 rear, 255/40 front unless somebody offers a perspective of why not to go this way. These will be right about 1000 dollars.
I'm not an expert on the road course with experience of only a bit of 125cc shifter kart and hitting the indoor kart place for fun now and again. For this reason it was suggested by a friend which does casual racing that I go with the hard compound as it is more forgiving in the corners to give you a hint before it's going to let loose. The hard compound should also throw less rocks and last longer if I do some cruising around town. I know I'll not be able to go as fast with the harder compound, but it should make for a nice training tire to learn the car.
My next consideration is how to set up the carb for the track.