North American Turbocoupe Organization



speed limiter
Momar Offline
Junior Member
#1
Do these cars have speed limiters normally? I know mine does, but when I searched on here I dont see any mention of speed limiters. Mine is limited right at about 100 mph. I have read several people talk about going faster than that with stock cars. Is there a way to get rid of this?

Ben
Past car:88 tc 5 spd.

9.3 in the 1/8 1.94 60 ft.
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Pete D Offline
Administrator
#2
These cars have rev limiters. They did not come with speed limiters.

What happens at 100 mph that it won't go faster.
Pete Dunham


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Momar Offline
Junior Member
#3
Well, it just stops at 100. It has since I got it. It pulls real hard right till then, and then it will just stop. No missing, bucking, or anything weird. It doesnt matter what gear I am in either. It just wont go.

Ben
Past car:88 tc 5 spd.

9.3 in the 1/8 1.94 60 ft.
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Pete D Offline
Administrator
#4
You got me. Are you sure it isn't a GM?
Pete Dunham


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Momar Offline
Junior Member
#5
Do you think that is possible that someone had an aftermarket limiter installed or something to keep their kid from going to fast?
Past car:88 tc 5 spd.

9.3 in the 1/8 1.94 60 ft.
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Pete D Offline
Administrator
#6
I guess it's possible but I never heard of an after market limiter nor have I heard of one in a TC. If it's set for 100 they missed the boat anyhow.

There are a couple things you could try. Testing the WG to see if it's blowing open. This is kind of a guess as it doesn't fit everything you describe. In the same vein, maybe run the fuel system diagnostics to make sure it isn't fuel limited. Again a guess that doesn't fit everything.
Pete Dunham


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Momar Offline
Junior Member
#7
I really would doubt the wastegate, or the fuel pressure are the culprit on this one. I have had the car for about 4+ years. I always assumed that it was limited at 100. It is always at the exact same speed, no matter what gear, boost level, throttle position it is at. I can be part or full throttle. Fourth, or Fifth gear. It was like this on the regular fuel setting, as well as premium. It is still that way now that I have bypassed the bcs. It gets there quicker now. The only mod to the car is that I turned up the boost to around 17-18, and I have run [email protected] in the 1/8 mile. If it is not a speed limiter, I wouldnt have a clue what it would be because like I said, it is always at the same speed, and it just stops accelerating.
Past car:88 tc 5 spd.

9.3 in the 1/8 1.94 60 ft.
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SteveX82 Offline
Posting Freak
#8
Exactly how are you determining that the car doesn't continue accelerating past 100mph? I'll presume you're not judging by the speedo alone, so what is the tach doing at this point?

------------------
Estoril blue 1987 TC 5spd, 145k miles, a237, Bailey BOV, rod's header, spec stg3 clutch, spearco FMIC, t3/t4 50 trim / stage III .63, 3" exhaust, eec-tuner, lm1 wb, 55pph injectors, wideband, Nitto 555R dr's
Best 1/4 mile: 13.08 @ 107mph on 26psi, 2.02 60'
Estoril blue 1987 TC 5spd, 148k mi, a237, Bailey BOV, spec stg3 clutch, spearco FMIC, 50 trim t3/t4, 3" exhaust, Bamafuel, LM1, 55pph
Best 1/4 mile: 12.31 @ 110mph on 25psi
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Jeff K Offline
Administrator
#9
Even if the EEC had a speed limiter in it (which it doesnt), it wouldnt "just stop accelerating" at 100. All OEM speed limiters drop out cylinders by shutting off a few injectors, which causes the motor to run REALLY rough when hitting the limiter.

Are you sure it has the stock EEC with no aftermarket chip attached to the J3 port?

As Steve is hinting at, maybe a speedo problem? I have seen a few cars (not TCs) where the speedo would stick at a certain speed due to a bent needle, etc.

------------------
Jeff Korn

88 Turbo Coupe: Intake and exhaust mods, T3 turbo at 21 psi, forced air intercooler, water injection, bypass valve, Ranger roller cam, subframes, etc., etc.. // 86 Tbird 5.0 (original owner): intake, exhaust, valvetrain mods, 100 HP nitrous, ignition, gears, suspension, etc., etc.... // 91 Escort: Bone stock winter car // 02 Taurus Vulcan(wifes car)
Jeff Korn

88 Turbo Coupe: Intake and exhaust mods, T3 turbo at 24 psi, forced air IC, water injection, BPV, Ranger cam, subframes, etc., etc.
86 Tbird 5.0 (original owner): intake, exhaust, valvetrain mods, 100 HP N2O, ignition, gears, suspension, etc., etc.
05 Taurus SEL Duratec daily driver
04 Taurus Duratec (wifes car)
02 Pontiac Grand Prix GT
95 Taurus GL Vulcan winter beater
67 Honda 450 Super Sport - completely customized
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Momar Offline
Junior Member
#10
I am judging by the fact that I stop gaining rpm and speed. I dont know what causes it if there is no limiter, but it just stops accelerating.

I have no idea if the car has a chip. By attatched to the J3 port, what do you mean. Is j3 the port connected to the computer? I am pretty sure I replaced the computer a few years ago w/ a normal replacement from a parts store. Are the chips normally used to change programming on these cars just the stock prom type inside the the computer?

Ben
Past car:88 tc 5 spd.

9.3 in the 1/8 1.94 60 ft.
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