Speed limiter
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Joined: Jul 2012
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Speed limiter Hey guys i have a 98 trans am that according to the door code it came with z rated tires but it wont go faster than 120 mph !
Ls1 no mods 6 speed 3.73 gears ! Whats the deal my wifes 98 t/a automatic climbs well above 120
Ls1 no mods 6 speed 3.73 gears ! Whats the deal my wifes 98 t/a automatic climbs well above 120
TECH Resident
Joined: Jun 2009
Posts: 856
Likes: 2
From: Elizabeth City NC
If it came with Z-rated tires then the stock speed limiter should be 162mph.... If no Z-rated tires then it will be 118mph.... You may not have the stock ECM in the car and was swapped with a car without Z-rated tires.
Kuhny, Welcome to LS1tech! SEARCH will be your best friend around here.
3.73 gears are certainly not stock so that car has at least that modified.
What RPM's are your turning at your 120MPH?
3.73 gears are certainly not stock so that car has at least that modified.
What RPM's are your turning at your 120MPH?
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Verdad Gallardo 163 is the limit...that is set in the computer. Not your tires. And just on a side...it is very very irresponsible to go that fast on public roads.
Kuhny, if your speedometer is indicating the correct speed (EG: It reads 50 when you're traveling at 50) the PCM's ratio is correct but it's from another vehicle with the lower max speed set.
