Wrong speed reading
Thread Starter
Member
Joined: Jan 2011
Posts: 468
Likes: 2
From: Harlingen , TX
Car: 1986 Camaro IROC-Z
Engine: 350 swap
Transmission: manual
Wrong speed reading
Hi,
I have 1991 firebird LO3 in which the previous owner made some changes?? and calibrated a 140mph speedometer to it. I changed back to the original 120mph speedometer (91-92;electrical)now it is not marking the proper speed. My questions are:
1- can I recalibrate the current speedometer to the. Or react speed?
2- what mechanical changes could alter the speedometer reading?
Thanks in advance!
I have 1991 firebird LO3 in which the previous owner made some changes?? and calibrated a 140mph speedometer to it. I changed back to the original 120mph speedometer (91-92;electrical)now it is not marking the proper speed. My questions are:
1- can I recalibrate the current speedometer to the. Or react speed?
2- what mechanical changes could alter the speedometer reading?
Thanks in advance!
Junior Member
Joined: Aug 2012
Posts: 47
Likes: 0
From: madison wi
Car: 91 camaro rs
Engine: 350 tbi. Rv cam. Edelbrock headers
Transmission: stage 3 700raptor 2400 stall
Axle/Gears: 3.42 posi+disc brakes
Re: Wrong speed reading
I know that if you change rear end gears that will mess with the speedo reading. Cus mine is off about 10 mph til i get 45mph then its around 15mph off. But my rear end was swapped from 3.08 to 3.73 and als my tranny was swapped from a t5 to a 700r4.
Thread Starter
Member
Joined: Jan 2011
Posts: 468
Likes: 2
From: Harlingen , TX
Car: 1986 Camaro IROC-Z
Engine: 350 swap
Transmission: manual
Re: Wrong speed reading
Yes, very similar. Mine is off about 10mph when my speedo hit 15mph. So i am actually going about 25mph.
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