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04-28-2019, 06:00 PM
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#1 |
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weSS1LEy
Drives: 2015 camaro 2ss/rs/1le Join Date: Sep 2015
Location: Kelowna
Posts: 510
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Follow up dyno thread: tire diameter on hp numbers
Alright let’s beat this to death a little more. How does ss tire size vs 1le tire size effect hp numbers? And does the size need to be inputted into the computer
275/40r20 = 28.66 inches tall 285/35r20 = 27.85 inches tall Could this account for a 30-40 hp difference?
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Rotofab, arh no cats, atak, elite cc, 94 octane tune, Mobil 1, phastek scoop, custom cam 230/243 .621 .604 114+4, related cam kit stuff. 470/435 rwhp/rwtq
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04-28-2019, 07:42 PM
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#2 |
          
Drives: 2010 CGM 2SS/RS LS3 Swapped A6 Join Date: Sep 2016
Location: Spring Hill, FL
Posts: 4,737
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I was under the impression this is exactly like gearing. In other words, no. It shouldn't make any difference in measured HP. Just one wheel size will spin faster than the other.
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2010 CGM Camaro 2SS LS3 Swapped A6 - GPI LS3 SS1 .647/.638, (224/237, 112 +4, 7º overlap) on CamMotion 8620 core, BTR Platinum .660" Dual Spring kit w/titanium retainers, CHE bronze trunnion upgrade, stock heads milled @ .015, Melling HV 10296 oil pump, TSP 1-7/8" long tube headers (W/Catless Off-road Pipes), Corsa Xtreme 3" Catback, GPI Ported/Rod Mod Intake, Stage 2 Ported Throttle Body, Vararam OTR CAI, Mike Norris Gen 2 catch can + GM 1LE clean side separator, 160º thermostat - Megan Racing adjustable coilovers (lowered 1.75"), MRR M017 10/11" wheels-Tuned by Ryan @ GPI
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04-28-2019, 07:49 PM
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#3 |
Drives: 2015 1LE Join Date: Oct 2015
Location: Cleveland, OH
Posts: 1,498
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There is no way less than one inch in tire diameter would be worth 30-40 HP
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2015 1LE, TSP 225/236 113+3, VMAX Throttle Body, CAI with race scoop, GPI Ported Intake, Land Speed Stage 2 Heads, 1-7/8 headers, NPP exhaust, 25% Fluidampr, LT1-S Monster Clutch, 485 RWHP & 444 TQ
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04-28-2019, 08:29 PM
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#4 |
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weSS1LEy
Drives: 2015 camaro 2ss/rs/1le Join Date: Sep 2015
Location: Kelowna
Posts: 510
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Some on here believe the faster spinning is the entire point though
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Rotofab, arh no cats, atak, elite cc, 94 octane tune, Mobil 1, phastek scoop, custom cam 230/243 .621 .604 114+4, related cam kit stuff. 470/435 rwhp/rwtq
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04-28-2019, 08:31 PM
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#5 |
 
Drives: Camaro Join Date: Apr 2019
Location: Illinois
Posts: 15
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.
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2010 Camaro ss2/rs
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04-28-2019, 11:29 PM
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#6 |
 
Drives: 2015 Summit White 2SS 1LE Join Date: Feb 2012
Location: Vance Alabama
Posts: 8,096
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Wont matter.
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05-01-2019, 07:32 AM
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#7 | |
 
Drives: 2023 Camaro ZL1 1LE Join Date: Feb 2016
Location: Middletown, DE
Posts: 340
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Quote:
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2014 Camaro SS Spring Edition LSX440ci
LSX Block, MAST 305 Black Labels, Exceldyne Valves, Diamond Pistons, Callies Crank & Rods, Cam Motion Cam, Johnson 2116LSR Lifters, Comp XDA Pushrods, Jesel Rockers, Mamo MSD, NW 102, Roto-Fab CAI, FAST 65# Injectors, ZL1 Fuel Pump, Kooks 2" Headers, Corsa Sport 3" Catback, Z28 Shifter, ZR1 Clutch, Katech LW Flywheel, 1LE 3.91 Diff, LPW Diff Cover, BMR - 1.4" Springs, LCA's, Trailing Arms, Toe Rods, Sway Bars, End Links, Diff Bushings, and Tunnel Brace, Z28/1LE Strut Tower Brace, Improved Racing Oil Cooler 2023 Camaro ZL1 / 1LE Stock  |
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05-01-2019, 10:06 AM
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#8 |
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Drives: 2015 Summit White 2SS 1LE Join Date: Feb 2012
Location: Vance Alabama
Posts: 8,096
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I went from a 28.8" tire to a 25.7" tire. Same numbers
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