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Old 03-10-2023, 12:38 PM   #15
Joshinator99


 
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Quote:
Originally Posted by JSH View Post
I wonder if a 15" wheel fits my car. The 15" 325 is a lot taller than a 19" 345.
You’ll need to do a rear brake conversion like I did to run 15’s. BMR sells the kit.
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Old 03-10-2023, 12:41 PM   #16
Ringmaster72
 
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Well, I ordered the 555ii in December and still have no ETA, so I am about to try something different I guess. 305/30-20 is what I ordered. I might just go with 305/35-20.
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Old 03-10-2023, 05:12 PM   #17
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305/35/20 is what I run. Per Dragy, Car will pull 3.0 0-60(2.7 with 1ft roll out like C8 uses) launching from second gear. So they won't hold 700+whp hammering it from a dig on the street but they do pretty good. They should hook really good on a basically stock ZL1.
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2016 NFG 1SS A8
Options-2SS Leather/NPP
Perf. mods-Whipple 2.9/Fuel System/Flex Fuel/103mm TB/Rotofab Big Gulp/Cat Deletes/Corsa NPP
Per. times- 10.5 @ 137 w/ 1.8 60ft Full weight on 20's 1200DA
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Old 03-10-2023, 05:54 PM   #18
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Originally Posted by KingLT1 View Post
305/35/20 is what I run. Per Dragy, Car will pull 3.0 0-60(2.7 with 1ft roll out like C8 uses) launching from second gear. So they won't hold 700+whp hammering it from a dig on the street but they do pretty good. They should hook really good on a basically stock ZL1.
Perhaps the next logical tire for me is the Toyo R88R in 345/30 ZR19, or try MTETS beadlock again and get the car aligned for it. The wobbling I had last year should not happen
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'20 ZL1 1LE A10,
OEM short block, LME heads/valve train, E2650,
100+ octanes, no eth, no meth, no N2O,
2/23 - 1031/1004 wheel, tuned by KingLT1,
4/23 - 1.41/9.61/145 at DA 7000 ft. (only made five passes).
2/24 - LME 390, E2650, FBO, race gas.
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Old 03-11-2023, 10:40 AM   #19
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Perhaps the next logical tire for me is the Toyo R88R in 345/30 ZR19, or try MTETS beadlock again and get the car aligned for it. The wobbling I had last year should not happen
For your car I would try the Toyo RR.
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2016 NFG 1SS A8
Options-2SS Leather/NPP
Perf. mods-Whipple 2.9/Fuel System/Flex Fuel/103mm TB/Rotofab Big Gulp/Cat Deletes/Corsa NPP
Per. times- 10.5 @ 137 w/ 1.8 60ft Full weight on 20's 1200DA
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Old 03-11-2023, 12:36 PM   #20
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Originally Posted by KingLT1 View Post
For your car I would try the Toyo RR.
This is the first time I've heard of this tire. It's a bit taller than the R888R and doesn't have a noise-making tread pattern. I'll check availability. (It too is not currently available. Appears to be a summer racing tire.)
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'20 ZL1 1LE A10,
OEM short block, LME heads/valve train, E2650,
100+ octanes, no eth, no meth, no N2O,
2/23 - 1031/1004 wheel, tuned by KingLT1,
4/23 - 1.41/9.61/145 at DA 7000 ft. (only made five passes).
2/24 - LME 390, E2650, FBO, race gas.

Last edited by JSH; 03-11-2023 at 12:51 PM.
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Old 03-11-2023, 12:37 PM   #21
KingLT1


 
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Originally Posted by JSH View Post
This is the first time I've heard of this tire. It's a bit taller than the R888R and doesn't have a noise-making tread pattern. I'll check availability.
That is what my Brother runs on his Z06 M7 that 60-130's mid 4's.
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2016 NFG 1SS A8
Options-2SS Leather/NPP
Perf. mods-Whipple 2.9/Fuel System/Flex Fuel/103mm TB/Rotofab Big Gulp/Cat Deletes/Corsa NPP
Per. times- 10.5 @ 137 w/ 1.8 60ft Full weight on 20's 1200DA
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Old 03-14-2023, 12:49 PM   #22
Ringmaster72
 
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Quote:
Originally Posted by KingLT1 View Post
305/35/20 is what I run. Per Dragy, Car will pull 3.0 0-60(2.7 with 1ft roll out like C8 uses) launching from second gear. So they won't hold 700+whp hammering it from a dig on the street but they do pretty good. They should hook really good on a basically stock ZL1.
What size are you running up front?
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Old 03-14-2023, 03:13 PM   #23
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Quote:
Originally Posted by Ringmaster72 View Post
Well, I ordered the 555ii in December and still have no ETA, so I am about to try something different I guess. 305/30-20 is what I ordered. I might just go with 305/35-20.
I run those also as King does and I'm lowered so no issues with rubbing. Perfect fit.
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2022 Lt1 6.2 A10, Maggie 2300, THPSI Port Inj/10 rib, Rotofab, E, Nickey, SCOL, Griptech, RC Bandits, Hoosiers/MT 9.80@142.96 1.44 60ft, 6.34@112 707/669 RWHP/TRQ. 16SS Maggie 2650 9.41@147 1.35 60ft, 5.99@119. 16 C7 A8 10.90@128 Bolt on stuff
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Old 03-14-2023, 03:15 PM   #24
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you need to do what I did and go 555RII 345/30R19, they are available
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Old 03-14-2023, 03:15 PM   #25
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Originally Posted by Ringmaster72 View Post
What size are you running up front?
I run the matching 245-40-20 Nitto 555G2 with my 305-35-20 R2s in the rear
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2022 Lt1 6.2 A10, Maggie 2300, THPSI Port Inj/10 rib, Rotofab, E, Nickey, SCOL, Griptech, RC Bandits, Hoosiers/MT 9.80@142.96 1.44 60ft, 6.34@112 707/669 RWHP/TRQ. 16SS Maggie 2650 9.41@147 1.35 60ft, 5.99@119. 16 C7 A8 10.90@128 Bolt on stuff
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Old 03-14-2023, 08:56 PM   #26
JSH


 
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Originally Posted by LiqTenExp View Post
you need to do what I did and go 555RII 345/30R19, they are available
Summit now has them. Your power is close to mine, so tell us about them.
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'20 ZL1 1LE A10,
OEM short block, LME heads/valve train, E2650,
100+ octanes, no eth, no meth, no N2O,
2/23 - 1031/1004 wheel, tuned by KingLT1,
4/23 - 1.41/9.61/145 at DA 7000 ft. (only made five passes).
2/24 - LME 390, E2650, FBO, race gas.
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Old 03-14-2023, 09:24 PM   #27
KingLT1


 
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Quote:
Originally Posted by Ringmaster72 View Post
What size are you running up front?
245/40/20
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2016 NFG 1SS A8
Options-2SS Leather/NPP
Perf. mods-Whipple 2.9/Fuel System/Flex Fuel/103mm TB/Rotofab Big Gulp/Cat Deletes/Corsa NPP
Per. times- 10.5 @ 137 w/ 1.8 60ft Full weight on 20's 1200DA
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Old 03-14-2023, 10:11 PM   #28
LiqTenExp

 
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Quote:
Originally Posted by JSH View Post
Summit now has them. Your power is close to mine, so tell us about them.
They are not as sticky as MT but they are extremely trustworthy on the street, they feel more like a road tire than drag tire at recommended manufacture pressures. If they get wet you don't die. If they get cold they don't complain that much. They don't make any noise like R888R.

Once you get them up to temp they are good, you can run them at ~30 psi and drive them around like street tires and definitely hold 3rd at our power level, if its a nice warm day you will hold 2nd. If you drop them down into the mid/high teens they behave like a drag tire.

I run PS4S 305/30R19 in the front and 555RII 345/30R19 in the rear
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