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» www.chirpthird.com » SSOA and friends » SSOA: "Back Porch" » Hey Ken C - NFB -

   
Author Topic: Hey Ken C - NFB -
Hawkeye
5th Gear
Member # 88

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Just changed the tires on my Subby,

went from the 245 - 75R - 16 Firestones to
Goodyear Wrangler A/Ts' 285 - 75R - 16.

Any idea how far off my speedo will be?

Approximately 2 inches taller.

Thanks,

--------------------
Hawkeye: SSOA F98-C98
 -

1998 SS - Black All Options - Mods
Whisper Lid, K & N, Lou's Short Stick, Shift Light, Skip Shift, SLP Y, Borla, 4:10's, BMR STB, SLP SFCs, Granatelli MAF, Hypertech III, 160 Stat, Mallory Billet Pedals, Metco Aluminum LCAs,Fast Toys Ram Air Mod, Spohn Panhard Bar, BMR Torque Arm, free EGR mod,power antenna, BMR LCA brackets, Gentex Temp/Compass Auto Dim Mirror, AllMaxx Strobe and Wig Wag, BAER Eradispeed rotors,PPC Headers with Random Technology Hi Flow Cats, BMR Drive shaft Loop,FAST 78MM Throttle Body, FAST 78MM Composite Intake, Mobil 1 & lots of Zaino.

Wife & Best Friend Mary - copilot.


Posts: 5558 | From: Windsor, Ontario. Canada | Registered: Feb 2000  |  IP: Logged
poSSum
AutoXer
Member # 119

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Not Ken C but I do have a calculator on my desk so I can do the theoretical.

You'll be going about 8% further every revolution if the tire diameter is accurate w.r.t the given dimensions. I get an overall height of 30.47" for the originals, 32.83" for the new ones.

You have a tach ... check these in Drive ... (not OD).

rpm kph
1000 38
1500 57
2000 77
2500 96
3000 115


Posts: 4222 | From: Winnipeg MB CA | Registered: Feb 2000  |  IP: Logged
Hawkeye
5th Gear
Member # 88

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thanks Art, I'll check this afternoon - with
the Post It note stuck to the dash.

--------------------
Hawkeye: SSOA F98-C98
 -

1998 SS - Black All Options - Mods
Whisper Lid, K & N, Lou's Short Stick, Shift Light, Skip Shift, SLP Y, Borla, 4:10's, BMR STB, SLP SFCs, Granatelli MAF, Hypertech III, 160 Stat, Mallory Billet Pedals, Metco Aluminum LCAs,Fast Toys Ram Air Mod, Spohn Panhard Bar, BMR Torque Arm, free EGR mod,power antenna, BMR LCA brackets, Gentex Temp/Compass Auto Dim Mirror, AllMaxx Strobe and Wig Wag, BAER Eradispeed rotors,PPC Headers with Random Technology Hi Flow Cats, BMR Drive shaft Loop,FAST 78MM Throttle Body, FAST 78MM Composite Intake, Mobil 1 & lots of Zaino.

Wife & Best Friend Mary - copilot.

Posts: 5558 | From: Windsor, Ontario. Canada | Registered: Feb 2000  |  IP: Logged
   

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