Anyone ever feel overtired?

[philip j]

[RarlyL8]

Interesting, mine are also Nitto NTSSS but have a different tread pattern. They are the R-type drag radials. I asked my drag racing buddies which tires ran wide and these were suggested.

[philip j]

Originally Posted by RarlyL8

Interesting, mine are also Nitto NTSSS but have a different tread pattern. They are the R-type drag radials. I asked my drag racing buddies which tires ran wide and these were suggested.

Brian, my tires are a "G2" series...
What pressure are you running?
https://www.nittotire.com/passenger-tires/nt555-g2-ultra-high-performance-tire/

[1979-930]

Originally Posted by philip j

315 nittos on 12" 3 piece Fuch with 6.5" backspace...

That’s a better fit.


Sent from my iPhone using Tapatalk

[RarlyL8]

I run 32psi on the street. Tread wear is even and handling is good.
A bit confusing that there are different tread patterns for the same model of tire. Not sure why they wouldn't just give a slightly different name to make it easier on the consumer. Probably the same lazy guy naming the tires that does the QC calibrations on their yardstick, ha!

[pdqcarrera]

Here's photo of a 285/40ZR17 Goodyear Eagle F1 GS-D3 mounted on 11"x17" 3pc Fuchs. Mated well with 235/40ZR17 in the front.

[David]

Finally made the change to 225/45-17 and 275/40-17 on 9 and 11.5 wheels. I’m going to add some wheel spacers.



First scale readings after some lightening

[Tug68]

Tire looks stretched,could have went a little bigger in my opinion but to each their own

[gumba]

PDQCarrera. Aren't those 275's?

[David]

I really liked the feel of the 225/275 vs the 255/315 I had. I did a track day at a small track (top speed about 110) and had plenty of grip. Then I played in the Texas Hill Country and it felt much more nimble than the bigger tires. I think I'll change the inside rear wheel halves to narrow the rear wheels to 11" but I think the 225/45 on the 9" wheel works just fine.

[M5guy]

I had 345s on the back of my 76, and I don’t remember what on the front, and it was the worst handling Porsche I ever owned.

[RarlyL8]

I had 345s on the back of my 76, and I don’t remember what on the front, and it was the worst handling Porsche I ever owned.

The Yokohama 345's were not good handling tires, Pirelli 345's were much better. I ran both types for several years until they became NLA. On front the 255/45-15 were a much better match than the 225/50-15.

[wayner]

Originally Posted by David

This past year I put on a new set of Toyo R888 in 255/40-17 & 315/35-17s and went to the Texas Hill Country Rally. The old girl did well but she just doesn't have the tossable feel that I'm so used to in the Cayman.

I doubt I'll ever drive the 930 on the track again so I'd like to work on the low speed handling (sub 100 mph) and make her more fun to throw around.

I'm thinking of trying 235/45-17 and 275/40-17. Do y'all think it will make a noticeable difference considering I'd still be running 9&11.5" wheels? Anyone need some slightly used 255 and 315 tires if I do change?

Any other ideas for making a 930 handle more like a 911SC/Carrera? Currently it has 22/31 torsions, Bilstein sports, and adjustable sways.

11.5 is pretty wide for a 275
I built my rims to 10.5 to accommodate that size

[gumba]

A simple adjustable shock would be an improvement over the Bilstein Sports. A bunch of years ago I switched from the Sports to re-valved Smart Racing shocks. A few years back I swapped out the rear s for adjustable Wevo/Ohlins. Recently I picked up a front pair of Ohlins single adjustables (they also make double adjustables) for the front. Haven't put those in yet, but I expect an improvement.

[gumba]

If the 315's are Goodyear F1's I'd be interested. Used BBS 17" halves are getting harder and harder to find.

[M5guy]

Originally Posted by gumba

If the 315's are Goodyear F1's I'd be interested. Used BBS 17" halves are getting harder and harder to find.

You gotta show us pictures of your flat six VDub Transporter

[gumba]

Still in the realm of this discussion I guess. Toyo R1R 225/45/16's on 8x16's, 245/40/17 on 9x17's 3 pc. Fuchs. The front suspension will be converted to ERP 935 control arms and Smart Racing Fox Shocks this winter. The rear has 27mm torsion bars, Wevo/Ohlins adjustable shocks with 150 lb coil over helper springs.

[930cabman]

It's always been my position the original size and manufacturer are best. Sure, you can do whatever you like, but the engineers designing our German sporting cars know their stuff.

Also true, they have made their share of mistakes .....

[flightlead404]

Originally Posted by 930cabman

It's always been my position the original size and manufacturer are best. Sure, you can do whatever you like, but the engineers designing our German sporting cars know their stuff.

Also true, they have made their share of mistakes .....

lol this is like discussing with bible thumpers how they know which parts were meant to be taken literally and which were allegorical.....how do you know that the mistakes they made weren't on tyre size?

Anyway, the mods many of us have made on our cars, plus the changes in tyre and wheel technology mean that there are (probably) better choices now. Certainly the options in a 16" wheel size are becoming more and more limited by the day.

[Ollies930]

Factory engineers had a much more limited choice when these cars were new and had to design a car that appealed to the general (buying) public at large, therefore there had to be many compromises as far as handling was concerned in favor of comfort. For the best handling version without compromise way back when, look to the 934s. Still relying on the chassis as the main frame as opposed to the 935s use of a cage to stiffen what was left of the chassis. However, technology has moved on substantially since then and we can do much better now.
But we are building these cars to suit our individual pallets, rather than trying to appeal to a bunch of other people.
All we are doing here, is sharing our experiences to help others fine tune their ideas to suit their tastes.