85mph speedo to 140mph

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Dec 23, 2011 | 03:16 PM

Manic Z

Thread Starter

Senior Member

iTrader: (1)

Joined: Oct 2002

Posts: 905

Likes: 42

From: Hamilton Ontario Canada

Car: 1985 Camaro IROC-Z

Engine: 350

Transmission: GForce T-5

Axle/Gears: 10 bolt 3.73 posi

85mph speedo to 140mph

Hey guys.
How do i recalibrate my new 140mph speedo to read properly.
It still sweeps like my old 85mph speedo.

Dec 23, 2011 | 05:13 PM

travis401

Supreme Member

iTrader: (1)

Joined: Mar 2007

Posts: 3,525

Likes: 7

From: Arlington, Tx

Car: 91 Camaro RS

Engine: empty bay (for now)

Transmission: Built T-56

Axle/Gears: 3.42 stock posi disc

Re: 85mph speedo to 140mph

is it electric or mechanical?

Dec 23, 2011 | 09:02 PM

ringo234

Supreme Member

Joined: Feb 2004

Posts: 1,581

Likes: 3

From: So Cal

Car: 89 IROC Z28

Engine: 357 TPI

Transmission: 700R4

Axle/Gears: 3.42 Posi

Re: 85mph speedo to 140mph

If its mechanical (89 or older) it doesn't need to be calibrated it's just plug and play.

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