85 TA SPEED LIMITER
Senior Member
Joined: Dec 2000
Posts: 886
Likes: 0
From: Raleigh, NC, USA
Well.. while the 4500rpm in drive isn't quite normal... the 3500 in OD is about right, unless you have a modified tranny that lets you run at WOT in OD.
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89 iroc-z 305 tbi
everything stock, except for a mirror that fell off
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89 iroc-z 305 tbi
everything stock, except for a mirror that fell off
Supreme Member
iTrader: (1)
Joined: Feb 2000
Posts: 7,964
Likes: 4
From: Norfolk, VA. USA
Car: 86 Trans Am, 88 Formula
Engine: 95LT4, 305TPI
Transmission: T56, T5
What speed are you at at 3500 on OD?
My 86 carbed T/A doesn't have a limiter as far as I know.
I've gotten my car up to almost 160mph a couple of times. I did 145mph last night for some odd reason, new years eve is not the safest night to run fast.
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Zepher
'86 Pontiac Trans Am WS6, LG4 305, 5 Speed, CF DF Clutch,
Edelbrock 1406 Carb, Edelbrock Performer RPM 7101 Intake Manifold.
Edelbrock Open Element Air Cleaner: Flowmaster Exhaust, 160* Thermostat,
Grant GT Steering Wheel, MSD HEI Coil, Taylor 8mm Wires, Leather 96 Camaro SS Seats,
Alpine CD+Changer,Alpine V12 Amps, Premier TS-1040C Subs, Polk Audio highs/mids.
Best ET: 14.94@91.67
High Speed Run: 157mph
WS6 Trans Am
My 86 carbed T/A doesn't have a limiter as far as I know.
I've gotten my car up to almost 160mph a couple of times. I did 145mph last night for some odd reason, new years eve is not the safest night to run fast.
------------------
Zepher
'86 Pontiac Trans Am WS6, LG4 305, 5 Speed, CF DF Clutch,
Edelbrock 1406 Carb, Edelbrock Performer RPM 7101 Intake Manifold.
Edelbrock Open Element Air Cleaner: Flowmaster Exhaust, 160* Thermostat,
Grant GT Steering Wheel, MSD HEI Coil, Taylor 8mm Wires, Leather 96 Camaro SS Seats,
Alpine CD+Changer,Alpine V12 Amps, Premier TS-1040C Subs, Polk Audio highs/mids.
Best ET: 14.94@91.67
High Speed Run: 157mph
WS6 Trans Am
Thread Starter
Junior Member
Joined: Jan 2001
Posts: 16
Likes: 0
From: ELK IN USA
i only have an 85 mph speedo so i dont know how fast, i can only guess about 115-125. once i shift into od i can run w,o,t and it wont kick down as long as i hold 3rd til it maxes out.
Moderator
Joined: Jan 2000
Posts: 19,655
Likes: 309
Kevin,
The speed limiter programming is a function of vehicle speed ssensor input, not the engine RPM directly.
The speed limiters on cars equipped with non-Z rated tires are set at around 118 MPH. Cars equipped with Z-rated tires are rumored not to have a speed limit programmed in, but this is not entirely true. The ECM requires some number in the memory address for fuel cut-off, or the car wouldn't run. GM entered teh maximum number in that address - 254. In essence, not many ThirdGens are going to see that limit, so there is effectively no limit.
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Later,
Vader
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"No matter how hard you try you can't stop us now"
Adobe Acrobat Reader 4.0
The speed limiter programming is a function of vehicle speed ssensor input, not the engine RPM directly.
The speed limiters on cars equipped with non-Z rated tires are set at around 118 MPH. Cars equipped with Z-rated tires are rumored not to have a speed limit programmed in, but this is not entirely true. The ECM requires some number in the memory address for fuel cut-off, or the car wouldn't run. GM entered teh maximum number in that address - 254. In essence, not many ThirdGens are going to see that limit, so there is effectively no limit.
------------------
Later,
Vader
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"No matter how hard you try you can't stop us now"
Adobe Acrobat Reader 4.0
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