SCCA CAM-C Thread

[CobaltFilly]

Suspension is all in the car and alignment completed. Was hoping to shake down the new setup this weekend, but with severe thunderstorms all weekend we're going to have to wait a bit longer it appears. Drove the car back home about 40 minutes through traffic and noticed the passenger side front reservoir was a bit warmer than the driver's side. Thinking it's getting a little extra cooked by the coolant reservoir bottle.

Considering cutting a small slot in the front upper grill area to let air up through the hood latch area just to promote some airflow over them and I figure I've got enough hood venting to not worry about it affecting me too negatively. Although if anyone has any tips for insulation/heat reflection products for the reservoirs, i'm open ears.

My friend where are you based out of? We are getting some storms here in Northern Cali too.

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[mavisky]

Atlanta.

 

[CobaltFilly]

Atlanta.

Jealous. Wish I lived in the United States.

 

[mavisky]

Jealous. Wish I lived in the United States.

Moving is a possibility. I used to live in a place where our autocross lots were smaller than you local Papa John's and there was snow on the ground 5 months a year.

 

[Aonarch]

I love my stones, I have 4 or 5 track days on them, plus 5-6 autox events, and I still have tread. I refused to spray them at all last summer, and they handled the heat like a champ. AT ECR last summer, they did start to let off due to heat 15 minutes into a 20 minute session, but the let off was so controlled and predictable, you could drive around it. The tires are at end of life now, and the grip is still far above any beyond the 660, to the point I am still putting in new PB at MSR. It's certainly less than it was on new stones, but it's still great.

For reference I am running the 305/19. I really wish Bridgestone would make an adult size RE-71 though. At least a 315/19, and probably a 325/19 too.

I am jumping to the CRS 325 next.

305 square?

 

[WItoTX]

305 square?

Yes.

 

[Aonarch]

Yes.

I saw where I think you wanted a 325, but are you content with 305 rear, especially exiting a corner under throttle?

 

[WItoTX]

I saw where I think you wanted a 325, but are you content with 305 rear, especially exiting a corner under throttle?

325's are on the car now. They feel great. The 305 bridgestones also felt great.

I haven't had the 325's on the big track yet (next month COTA), but I will say the Bridgestone 305's are fantastic. Heat up relatively quick, very forgiving if you apply too much throttle, very predictable, the grip limit of the tire is very easy to feel, and when you go past the limit, it's a very controllable.

 

[CobaltFilly]

305 square?

305 is tread width, 305mm. Square means I have them on every corner of the car bidirectionally so I can rotate tires more effectively to ensure they last longer. Versus a “staggered” setup where the rear ls are typically a bit wider, say 315mm.

Corner balancing for one thing, rotation is another thing, weight is a third thing for me, and any larger I would lose power because of V6 . My grip is exceptionally balanced currently, no sliding at all.

 

[Aonarch]

305 is tread width, 305mm. Square means I have them on every corner of the car bidirectionally so I can rotate tires more effectively to ensure they last longer. Versus a “staggered” setup where the rear ls are typically a bit wider, say 315mm.

Corner balancing for one thing, rotation is another thing, weight is a third thing for me, and any larger I would lose power because of V6 . My grip is exceptionally balanced currently, no sliding at all.

Lol I know that.

I was asking him if he had 305 on all four corners, since he mentioned wanting to go to 325.

 

[CobaltFilly]

Lol I know that.

I was asking him if he had 305 on all four corners, since he mentioned wanting to go to 325.

Apologies

 

[mavisky]

I saw where I think you wanted a 325, but are you content with 305 rear, especially exiting a corner under throttle?

We've all gotten used to massive tire sizes. While bigger can be better, it takes massive wheels to properly support them enough to gain any real advantage from the wider tire. I ran last year on the 295 Yokohamas over an 11" wheel and they were as good as any of the 305's I've ever run. Having a wider wheel than a tire give you more predictable breakaway characteristics as well which is why the factory GT350 tires are a bit stretched on the wheel setup they came with.

 

[CobaltFilly]

We've all gotten used to massive tire sizes. While bigger can be better, it takes massive wheels to properly support them enough to gain any real advantage from the wider tire. I ran last year on the 295 Yokohamas over an 11" wheel and they were as good as any of the 305's I've ever run. Having a wider wheel than a tire give you more predictable breakaway characteristics as well which is why the factory GT350 tires are a bit stretched on the wheel setup they came with.

Isn’t the old adage “bigger is better”

 

[mavisky]

Isn’t the old adage “bigger is better”

Definitely not saying it's not, but on an 11" wheel a 305 will outperform a 325 99% of the time. All we care about is contact patch, not tire width. If you pinch the wider tire, the actual tread area will be arched instead of flat. This results in those additional millimeters hovering off the groun and a less responsive tire in general as you've already introduced flex to it. This makes the handling seem unreliable as the sidewall will shift more than it already would to begin with and that will cause the car to break away in a more snappy fashion than a more progressive slide that's easier to also recover from.

Wider is almost always better, but to do so correctly you need to go wide in every facet, not just the tire.

 

[NightmareMoon]

If you could measure 19" when you get them and have them mounted....

I am considering a set because they do seem legit but measurements Dallas posted don't seem to be too accurate. But even if 19"s are half an inch short, that's not too bad.

I finally got the 19s and had them mounted. Tire shop struggled, lol.

mounted diameter seems about 26.2". That's off the car, not rolling diameter.

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