3rd Gen Protege/MazdaSpeed/P5/MP3 General/Maintenance Discussion for 1999-2003.5 Models Only (BJ Chassis)

is there a LIMIT

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Old February-12th-2002, 10:19 AM
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is there a LIMIT

Okay.....is there a limit....or limiter for the P-5 built into the computer? I had one little spurt up to 110.....and read somewhere on the board that the computer will shut you down at 115.....however....whether he was serious or not....someone else posts that they have hit 120?......Just curious......does the computer have a limiter built in? and if so...is it for all NA cars? or just the US, or Just Canada? ..... anyone know for sure?
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Old February-12th-2002, 11:03 AM
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i think most import and domestic compacts have a limiter.....luxury cars such as lexus and pure sports car for example usually dont have a limiter..thats what I know about that...and i think its like that all over america...
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Old February-12th-2002, 11:20 AM
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I sure hope not ... That would be stupid if the limiter kicked in at 115 mph , that means when i get my P5 there would be no use for NOS if my car is going to shut off when i race people ! NOOOOOOOOOOOOOOOOOOOOO !!!!!!!!!

On a good note, there are ways around disabling limiters
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Old February-12th-2002, 11:26 AM
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I dont think theres a limiter, because if there was, someone would of been bound to notice it and post it as a CON or something on some site lol
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Old February-12th-2002, 11:29 AM
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well.....how about it out there....those of you that have had your P-5's for a while...those that have pushed the envelope a bit? or hit the track.....is there? or isn't there? anyone know for SURE?
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Old February-12th-2002, 11:50 AM
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MY CAR JUST WONT GO ANYMORE AROUND 110-112
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Old February-12th-2002, 12:03 PM
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My touring 1.8L blocked around 192 kph (120mph flat!!)
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Old February-12th-2002, 12:58 PM
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What you're referring to is a speed governor, and yes, I believe the P5 has one, as do the vast majority of cars sold in this country (US). I believe the P5's is set at 115, although aerodynamic drag would likely slow you down before the computer would. I think the cD of the P5 is pretty high. Anyone have the number?

Don't forget, too, that the speedo in most cars is reasonably inaccurate, particularly at higher speeds, so that 120 mph is only indicated, not actual. The radar gun the cop uses to pull you over will show a more accurate speed. Take it to the track.

Hey lost: I wouldn't scrap the plans for NOS yet. I have a feeling you can still use it at less-than-warp speeds. If you haven't beat them by 115, it's probably not going to happen at all.
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Old February-12th-2002, 01:23 PM
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Very True exmiatiaman......the speedo is fairly inaccurate....and even more correct to take it to the track....if for no other reason...safety's sake.....however....I don't have a roundy round track anywhere near here....and there is no way that a drag strip is going to be long enough...lol. This was more of a general question....a quest for knowledge.

Lost.....he is certainly correct....if you are playing catchup and nearing 115....you are most likely all done anyway. but don't scrap the N20.....you are lookin to "flip the switch" at high gear/full throttle...and you will be far from your top end when you shift into 5th and HAMMER down!
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Old February-12th-2002, 01:57 PM
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There is a 'governor' on all cars sold in US and Canada. It wouldn't make sense that they impose them on some cars, and not do so on others.
My friend's civic cut off at I think 180 km/h. I'm pretty sure that our limited speed here in Canada is a bit slower then yours, but not entirely sure. Can somebody confirm? I've been up to 170km/h
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Old February-12th-2002, 03:43 PM
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Originally posted by Makaveli
There is a 'governor' on all cars sold in US and Canada. It wouldn't make sense that they impose them on some cars, and not do so on others.
My friend's civic cut off at I think 180 km/h. I'm pretty sure that our limited speed here in Canada is a bit slower then yours, but not entirely sure. Can somebody confirm? I've been up to 170km/h
No, there isn't a governor on every single car sold here, which makes perfect sense. A governor isn't imposed by anyone, it's a choice of the manufacturer as to whether they want to limit the top speed of the car, generally for safety reasons. Usually if a car is limited it's because of the speed rating of the tires (e.g., cars that have H-rated tires are often governed to 130 mph).

According to C&D's test of the Protege5 (C&D actually takes the cars to a track and radar-tests the top speed) it's NOT governed but simply runs out of steam (drag-limited) at around 118 mph (190 km/h). That sounds about right to me given the weight of the car and power available.
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Old February-12th-2002, 03:52 PM
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Does C&D actually SAY there is no governor on the P5, or did you just infer that (FWIW, I'm not accusing, I'm just curoius)? I could have sworn I had read somewhere that the P5 has one. It's not at all uncommon for a car to be unable to hit its governor limit.

Originally posted by bmorton


No, there isn't a governor on every single car sold here, which makes perfect sense. A governor isn't imposed by anyone, it's a choice of the manufacturer as to whether they want to limit the top speed of the car, generally for safety reasons. Usually if a car is limited it's because of the speed rating of the tires (e.g., cars that have H-rated tires are often governed to 130 mph).

According to C&D's test of the Protege5 (C&D actually takes the cars to a track and radar-tests the top speed) it's NOT governed but simply runs out of steam (drag-limited) at around 118 mph (190 km/h). That sounds about right to me given the weight of the car and power available.
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Old February-12th-2002, 04:04 PM
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Originally posted by exmiataman
Does C&D actually SAY there is no governor on the P5, or did you just infer that (FWIW, I'm not accusing, I'm just curoius)? I could have sworn I had read somewhere that the P5 has one. It's not at all uncommon for a car to be unable to hit its governor limit.
If you look at the performance data box for each C&D test, they show the tested top speed and explicitly state whether that top speed was governed or drag-limited. For the P5 they found its top speed was drag-limited. If the P5 is governed higher than its actual stock top speed for some reason, that's not something that's likely to be discovered by the casual owner or in a magazine road test of a stock vehicle.
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Old February-12th-2002, 04:25 PM
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I know that much, but the C&D info only shows that the top speed in this particular test was limited by drag, not the computer. It doesn't answer the original question: does the P5 have a governor? It's academic, at best, but I'd still like to know if anyone has this information.

Originally posted by bmorton


If you look at the performance data box for each C&D test, they show the tested top speed and explicitly state whether that top speed was governed or drag-limited. For the P5 they found its top speed was drag-limited. If the P5 is governed higher than its actual stock top speed for some reason, that's not something that's likely to be discovered by the casual owner or in a magazine road test of a stock vehicle.
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Old February-12th-2002, 04:33 PM
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TheMan, what's happening? Are you lost your edge? This thread is asking for you growling "Do search before posting!"
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