Speedometer
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Junior Member
Joined: May 2001
Posts: 24
Likes: 0
From: San Juan, TX
Speedometer
I have a 1991 Z28 305 and the speedometer reads 110mph. I want it to read 140mph. Do I have to swap the whole thing and change my prom or is it easier like just bolt it right in. By the way on my current, my speedlimiter does not let me pass the 110mph mark. Thanks.
Joined: Jul 1999
Posts: 10,950
Likes: 26
From: Orange, SoCal
Car: 1990 Pontiac Trans Am
Engine: 355 TPI siamesed runners
Transmission: Tremec T56
Axle/Gears: 12-Bolt 3.73
The speedometer swap is a direct plug in. To remove the speed limiter, however, you need a custom chip. Or you can get a stock 1991 350 replacement chip from your local dealer or discount online GM dealer.
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1991 Camaro Z28
5.7L 5-Speed (originally 305)
317 RWHP, 418 RWTQ
13.23 @ 107.62 MPH
Southern California
Member: SoCal 3rd Gen F-Bodies
Member: SoCal F-Bodies
-=ICON Motorsports=-
------------------
1991 Camaro Z28
5.7L 5-Speed (originally 305)
317 RWHP, 418 RWTQ
13.23 @ 107.62 MPH
Southern California
Member: SoCal 3rd Gen F-Bodies
Member: SoCal F-Bodies
-=ICON Motorsports=-
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