Track Tires 964 C4 16"
03-10-2015, 10:54 PM
#31
Rennlist Member
I think PCA should have a rule about r-comp tires.
1) Instructed groups must use street tires
2) Solo drivers may use R-Comps once they have had a beer with an existing R-Comp driver and listened to them **** and moan about how expensive they are and how they dont last... and most importantly how there is no way to go back...
1) Instructed groups must use street tires
2) Solo drivers may use R-Comps once they have had a beer with an existing R-Comp driver and listened to them **** and moan about how expensive they are and how they dont last... and most importantly how there is no way to go back...
03-10-2015, 11:10 PM
#32
Has anyone else actually run a 964 C4? Using 6 + 8 X 16" wheels is laughable beyond a pony trot pace. I used to use 225 + 255 X 17 on Cup 1s, and THAT was marginal--T9 @ Willow comes to mind. (I was ~ 4 sec. lap slower than in the then-D Stock RS America Club Racer on similar V700 or Hoosier at Thunderhill and Laguna.)
Bottom line here is that you need more tire up front. And that means using a 17" wheel. (I can't even imagine being concerned about the weight of Cup 1s--I think I still hold the class lap record at Thunderhill in the RSA using them.)
Bottom line here is that you need more tire up front. And that means using a 17" wheel. (I can't even imagine being concerned about the weight of Cup 1s--I think I still hold the class lap record at Thunderhill in the RSA using them.)
225-255 17's gave a lot more grip up front on my old 964 C4.
Are you running the star spec Dunlop's?(version 1 or 2)
A good piece of advice from one of the better instructors I had "unless your tires are screaming out of every corner no need to upgrade" is 100% true.
Rennsport DE's?
03-11-2015, 09:10 AM
#34
Burning Brakes
Thread Starter
Have to agree with Ken!
225-255 17's gave a lot more grip up front on my old 964 C4.
Are you running the star spec Dunlop's?(version 1 or 2)
A good piece of advice from one of the better instructors I had "unless your tires are screaming out of every corner no need to upgrade" is 100% true.
Rennsport DE's?
225-255 17's gave a lot more grip up front on my old 964 C4.
Are you running the star spec Dunlop's?(version 1 or 2)
A good piece of advice from one of the better instructors I had "unless your tires are screaming out of every corner no need to upgrade" is 100% true.
Rennsport DE's?
03-11-2015, 09:11 AM
#35
Burning Brakes
Thread Starter
Thank you all for your help.
Bottom line, the D90s are gonna go
I'll keep the Cup 1s for the street and get OZ Allegerita in 18 for the track
Bottom line, the D90s are gonna go
I'll keep the Cup 1s for the street and get OZ Allegerita in 18 for the track
03-11-2015, 10:19 PM
#36
I've been running RS3s and Direzza star specs in 225/255 for a few years in DEs and they work great for the level I'm at. Start with a forgiving tire and get a feel for the balance of the car.
03-11-2015, 11:16 PM
#37
Drifting
If you want to go 245/45 and 275/40 ,you will need a lot of - camber and that will cost you big money ... camber plates,etc, and you will roast your street tires in no time.
It makes more sense to stick with 17 inch tires as the overall diameter will not be as high as the 18 inch wheels,unless you want a rally car or the other option will be to have elastic bands on your 18 inch wheels in order to keep the ride height reasonable ...
There are a few Rennsport members with 964's,you should consult with them first before you spend big $$$ on 18 inch wheels and tires,maybe Daniel or Bernard will chime in ...
Just sayin ...
Cheers
Phil
03-12-2015, 09:20 AM
#40
Burning Brakes
Thread Starter
A little bit of background. I have tracked and/or raced all kinds of things (from a 5hp gokart to an 800hp Lambo).
The 964 is the first 911 I track. It is a DE car (fully gutted interior, stock engine for the moment and working on a proper suspension setup with Elephant Racing). I wanted a tire that would make sense with the rest of the car. Again, the car came with D90s. Therefore, I have them and they are fairly light. If it made sense, I would have used them. Apparently, it doesn't. lol
Street tires (and driver) seem to be the limiting factor at this point (engine is probably next).
Lap times are consistent in the 2.01 in Tremblant for example with the car fully stock (which I was told was decent for a stock 964).
Hope this helps understanding my needs.
Thank you all for your inputs.
To summarize, the consensus is 17" with an R compound tire to start with?
In that case, options are limited, no? (I looked and didn't find much hence why I wanted to go 18s, much more choice).
The 964 is the first 911 I track. It is a DE car (fully gutted interior, stock engine for the moment and working on a proper suspension setup with Elephant Racing). I wanted a tire that would make sense with the rest of the car. Again, the car came with D90s. Therefore, I have them and they are fairly light. If it made sense, I would have used them. Apparently, it doesn't. lol
Street tires (and driver) seem to be the limiting factor at this point (engine is probably next).
Lap times are consistent in the 2.01 in Tremblant for example with the car fully stock (which I was told was decent for a stock 964).
Hope this helps understanding my needs.
Thank you all for your inputs.
To summarize, the consensus is 17" with an R compound tire to start with?
In that case, options are limited, no? (I looked and didn't find much hence why I wanted to go 18s, much more choice).
03-12-2015, 09:51 AM
#41
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Given, the fact that a suspension will be done sooner rather than later, I'd be inclined to go with 18s.
You'll end up there anyway. Why end up with a raft of wheels you're not using and need to sell at loss.
Go get around 3 secs at Tremblant, and then another 2 secs on R6's, THEN think about an engine.
https://rennlist.com/forums/racing-a...tremblant.html
You'll end up there anyway. Why end up with a raft of wheels you're not using and need to sell at loss.
Go get around 3 secs at Tremblant, and then another 2 secs on R6's, THEN think about an engine.
https://rennlist.com/forums/racing-a...tremblant.html
03-12-2015, 10:32 AM
#42
I started using Hoosier R6's on my 2003 Carrera 4S as one of my first mods. I was immediately in love but as I learned and got faster, they were good for one DE weekend plus maybe a few more sessions. I couldn't justify buying more Hoosiers (more! I must have more!) so I begrudgingly switched last year to Toyo 888s. Hated them at first - who wouldn't after Hoosiers, and immediately losing seconds per lap - but I came to realize the Hoosiers had been killing my stock brakes and were hard on suspension & other components. Bottom line: unless your car is set up to handle Hoosiers, don't go there (oh, and even if your car is right for them, prepare to become an addict who can justify nearly anything).
03-12-2015, 11:33 AM
#43
18's were never approved on the 964....bought some 18's and sold them once I started looking into the bracing required to the steering rack. May have some Kinesis wheels you may be interested in.
PM sent
PM sent
03-12-2015, 11:38 AM
#44
Why would you want 18 inch wheels for your car ... you will be limited to 225/45 fronts and 255/40 rears anyways !
If you want to go 245/45 and 275/40 ,you will need a lot of - camber and that will cost you big money ... camber plates,etc, and you will roast your street tires in no time.
It makes more sense to stick with 17 inch tires as the overall diameter will not be as high as the 18 inch wheels,unless you want a rally car or the other option will be to have elastic bands on your 18 inch wheels in order to keep the ride height reasonable ...
There are a few Rennsport members with 964's,you should consult with them first before you spend big $$$ on 18 inch wheels and tires,maybe Daniel or Bernard will chime in ...
Just sayin ...
Cheers
Phil
If you want to go 245/45 and 275/40 ,you will need a lot of - camber and that will cost you big money ... camber plates,etc, and you will roast your street tires in no time.
It makes more sense to stick with 17 inch tires as the overall diameter will not be as high as the 18 inch wheels,unless you want a rally car or the other option will be to have elastic bands on your 18 inch wheels in order to keep the ride height reasonable ...
There are a few Rennsport members with 964's,you should consult with them first before you spend big $$$ on 18 inch wheels and tires,maybe Daniel or Bernard will chime in ...
Just sayin ...
Cheers
Phil
