Bridgestone Potenza RE-71R 305/30R-19 (new size) Discussion Thread - Page 7 - Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums

RKeeton · 09-12-2016, 09:18 AM

Quote:

Originally Posted by ICTsccaCamaro

Well almost all of the 1LE's at nationals this year were on 305's if that tells you anything and were very quick.

The courses were great with the 305's. The big sweepers were a breeze with great balance (no understeer). Even the slaloms were good as long as you didn't enter too fast.

The shorter tire had me hitting the rev limiter at the finish line on the west course. Something that has never happened before.
We noticed that the McGeorge 1LE was really stable and flat on course where my car would lean more and really dive under braking. Some pictures, the front splitter was almost touching the concrete. I think the tires actually contributed to that since there was so much grip. The car needs the shock upgrade from stock to compensate and support the weight transfer.

clarkkent · 09-13-2016, 01:14 AM

Quote:

Originally Posted by RKeeton

The courses were great with the 305's. The big sweepers were a breeze with great balance (no understeer). Even the slaloms were good as long as you didn't enter too fast.

The shorter tire had me hitting the rev limiter at the finish line on the west course. Something that has never happened before.
We noticed that the McGeorge 1LE was really stable and flat on course where my car would lean more and really dive under braking. Some pictures, the front splitter was almost touching the concrete. I think the tires actually contributed to that since there was so much grip. The car needs the shock upgrade from stock to compensate and support the weight transfer.

Time for some Z28 suspension!

On another note, FYI I put some pics up of the 305/30r19 trofeo r's on Apex Arc8 19x10.5" wheels. I definitely wouldn't put 305's on 10" wide wheels

http://www.camaro5.com/forums/showpo...4&postcount=32

ICTsccaCamaro · 09-14-2016, 10:41 AM

Quote:

Originally Posted by clarkkent

Time for some Z28 suspension!

On another note, FYI I put some pics up of the 305/30r19 trofeo r's on Apex Arc8 19x10.5" wheels. I definitely wouldn't put 305's on 10" wide wheels

http://www.camaro5.com/forums/showpo...4&postcount=32

Nope time for the new adjustable Koni Yellows

Burt · 09-14-2016, 12:23 PM

Quote:

Originally Posted by ICTsccaCamaro

Nope time for the new adjustable Koni Yellows

Can you stay in FS with the Konis on our cars? I've heard that the adjustable spring perches move them to another category.

Cornercarver · 09-14-2016, 01:21 PM

Quote:

Originally Posted by Burt

Can you stay in FS with the Konis on our cars? I've heard that the adjustable spring perches move them to another category.

Yellows don't have adjustable spring perchs.

nilfinite · 09-14-2016, 04:21 PM

The final news on the Koni Yellow (I made some posts questioning their legality) is that they are legal for FS. They were used on the Gen5 1LE that got #2 in the FS class @ 2016 SCCA Nationals.

One person mentioned that the car rides lower with the Koni Yellows. Another person mentioned that it's the same height. Either way, differences in the gas/oil/construction of the shocks might contribute to slightly different ride heights. As long as the spring perch is the same height as stock, it's legal.

RKeeton · 09-14-2016, 07:07 PM

Quote:

Originally Posted by clarkkent

Time for some Z28 suspension!

On another note, FYI I put some pics up of the 305/30r19 trofeo r's on Apex Arc8 19x10.5" wheels. I definitely wouldn't put 305's on 10" wide wheels

http://www.camaro5.com/forums/showpo...4&postcount=32

It was a struggle to get them to mount, but how about the 275's on 8.5 inch wheels. They aren't in spec either, but that was the fastest car at Nationals. Autocross is a different discipline and defies the norm in tire fitment. It has always been that way since I have been involved.

fzss · 09-15-2016, 03:05 PM

Just got mine mounted in time for an event this Saturday. These are the fronts, 19x10. We had no issue whatsoever getting them to mount, got all 4 mounted and balanced in under 45 minutes. I'll update on Sunday or Monday.

JRL1LE · 09-15-2016, 03:10 PM

Quote:

Originally Posted by fzss

Just got mine mounted in time for an event this Saturday. These are the fronts, 19x10. We had no issue whatsoever getting them to mount, got all 4 mounted and balanced in under 45 minutes. I'll update on Sunday or Monday.

Z3papa · 09-15-2016, 08:27 PM

Quote:

Originally Posted by nilfinite

The final news on the Koni Yellow (I made some posts questioning their legality) is that they are legal for FS. They were used on the Gen5 1LE that got #2 in the FS class @ 2016 SCCA Nationals.

One person mentioned that the car rides lower with the Koni Yellows. Another person mentioned that it's the same height. Either way, differences in the gas/oil/construction of the shocks might contribute to slightly different ride heights. As long as the spring perch is the same height as stock, it's legal.

I was both paddocked across from Courtney and Rod, and grid next to them. I consider them friends. I didn't notice the car was appreciably lower than earlier in the year but wasn't taking measurements and would never protest as I lent them my sprayer first day to bring tire temps down. The tires are hella big and definitely worthwhile if you are auto crossing an 1LE. You can't really ever say they are "legal" until or unless someone takes measurements to be certain they won't be papered. Probably the authority who knows best is Sam Strano or Lee at Koni as they know the issue I referenced earlier.

nilfinite · 09-15-2016, 11:07 PM

Rod and Courtney bought the Koni's from Sam Strano. Those veterans know the rules exactly and wouldn't risk getting protested!

Z3papa · 09-16-2016, 04:17 PM

Quote:

Originally Posted by nilfinite

Rod and Courtney bought the Koni's from Sam Strano. Those veterans know the rules exactly and wouldn't risk getting protested!

If they bought them from Sam, I'm certain then they were either legal when manufactured or modified using the weld on washer which fixed the unit to not increase camber. Sam was source of information that some Koni units were not in compliance with rules.

nilfinite · 09-16-2016, 04:27 PM

Quote:

Originally Posted by Z3papa

If they bought them from Sam, I'm certain then they were either legal when manufactured or modified using the weld on washer which fixed the unit to not increase camber. Sam was source of information that some Koni units were not in compliance with rules.

Gotcha. Interesting info!

Has anyone tried custom-valved Koni shocks before? Still need to read up on shock construction... So we want max gas pressure to get some extra spring rate from the shocks and then what else?

fzss · 09-18-2016, 02:12 PM

Update from Saturday's Champ event:

Took 1st in CAM-C by 1.7 seconds. The driver in 2nd usually has me by several tenths, but not yesterday.

Also had the fastest CAM time of the day, beating out a well-prepped Z06 with a very experienced driver.

I hate to sound like a fanboy, but these 305 tires are seriously incredible. I landed at about 36 psi up front and 35 psi in the rear as my happy place, just about at sea level 75 degrees F. I only did 5 runs, so I'm curious what pressures others are running.

Funny thing: the rear wheels actually spun several degrees inside of the tires during my runs, throwing off the balance. I'm hoping this isn't the grip/power combination, but rather the leftover grease used to mount the tires... oops!

09-14-2016, 04:21 PM	#90
nilfinite Drives: Camaro 1LE Join Date: Nov 2015 Location: Bay Area, CA Posts: 245	The final news on the Koni Yellow (I made some posts questioning their legality) is that they are legal for FS. They were used on the Gen5 1LE that got #2 in the FS class @ 2016 SCCA Nationals. One person mentioned that the car rides lower with the Koni Yellows. Another person mentioned that it's the same height. Either way, differences in the gas/oil/construction of the shocks might contribute to slightly different ride heights. As long as the spring perch is the same height as stock, it's legal. Last edited by nilfinite; 09-14-2016 at 04:35 PM.

09-15-2016, 11:07 PM	#95
nilfinite Drives: Camaro 1LE Join Date: Nov 2015 Location: Bay Area, CA Posts: 245	Rod and Courtney bought the Koni's from Sam Strano. Those veterans know the rules exactly and wouldn't risk getting protested! Last edited by nilfinite; 09-16-2016 at 09:28 AM.

09-15-2016, 03:05 PM	#92
fzss Drives: 2013 SS Camaro Join Date: May 2015 Location: San Diego, CA Posts: 50	Just got mine mounted in time for an event this Saturday. These are the fronts, 19x10. We had no issue whatsoever getting them to mount, got all 4 mounted and balanced in under 45 minutes. I'll update on Sunday or Monday.

09-18-2016, 02:12 PM	#98
fzss Drives: 2013 SS Camaro Join Date: May 2015 Location: San Diego, CA Posts: 50	Update from Saturday's Champ event: Took 1st in CAM-C by 1.7 seconds. The driver in 2nd usually has me by several tenths, but not yesterday. Also had the fastest CAM time of the day, beating out a well-prepped Z06 with a very experienced driver. I hate to sound like a fanboy, but these 305 tires are seriously incredible. I landed at about 36 psi up front and 35 psi in the rear as my happy place, just about at sea level 75 degrees F. I only did 5 runs, so I'm curious what pressures others are running. Funny thing: the rear wheels actually spun several degrees inside of the tires during my runs, throwing off the balance. I'm hoping this isn't the grip/power combination, but rather the leftover grease used to mount the tires... oops!