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12-27-2022, 12:21 PM
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#15 |
   
Drives: 2013 zl1 vert Join Date: Dec 2018
Location: Rochester, New york
Posts: 1,231
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this might not help but i daily mine with 255-45-18 front and 315-40-18 with no lights.
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22% lower/ 2.5 upper/ 2” headers/ cat delete/ x-pipe/ 2 gallon x tank/ 100-3 pump/ fic 1300/ dsx aux kit/ 103mm throttle body/ big gulp 5” intake/ meth kit/ prometh lid injection/FI interchiller/ 160* stat/ ngk-7/ msd wires/ elite catch can/ tsp cam/ Che trunnions/ ported supercharger/ 1/2” lid spacer/ cnc,milled ported heads/ brick mod/BMR toe and trailing arms/ 781hp 748 tq SAE @17.3lb on a loaded dyno.
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12-27-2022, 01:02 PM
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#16 | |
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Account Suspended
Drives: 2013 2SS/RS Convertible Join Date: Apr 2016
Location: Lehigh Valley, PA
Posts: 3,873
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Quote:
 That shows a 3.3% difference so that’s under the 6% “acceptable” range. Appreciate the share. |
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01-09-2023, 12:17 AM
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#17 |
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Account Suspended
Drives: 2013 2SS/RS Convertible Join Date: Apr 2016
Location: Lehigh Valley, PA
Posts: 3,873
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So to update my thread….
This is what I decided to do. I’m keeping my 275/40-20 & 315/35-20 combo for street and road work. I used a tire calculator to find a proper front to go with my new 18” drag radials and then found a rear size to match so I can drive to the track then put on the 18”s. The only problem so far is the required 225/40-20 seems to be a very odd size. Always something. 
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