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#2111807 - 08/08/10 05:49 PM Speed limiter
Quatrelle Offline
Member

Registered: 03/16/10
Posts: 365
Loc: The Netherlands, Europe
Hey guys,


I was wondering, my 1997 MGM came equipped with a speed limiter and kicks in at 100 mph. The moment it reaches 100 mph, the engine kind a hesitates a bit and remains at this speed.

I want to cruise the Autobahn in Germany with no limiter.

Is this limiter something only export cars came equipped with?
If not, how do I remove this?

Thanks!

Eelco
_________________________
Mercury Grand Marquis LS 281cu. LS 1997 > 158K miles
Renault 4 1968 4-speed 845cc.
Renault 5 TL 1983 5-speed 1008 cc.




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#2111848 - 08/08/10 06:56 PM Re: Speed limiter [Re: Quatrelle]
BigMerc96 Offline

I know nothing
Posting Addict

Registered: 06/05/10
Posts: 19868
Loc: I can see Detroit from here!
Strange my '96 doesn't hit the limiter 'till around 110mph. Anyway the limiter can be removed with a tune. All Panthers have a limiter set between 100 and 135mph depending on year and equipment (police package getting the higher limiter). I wouldn't think one of these boats would do much more than 150mph stock, you'll have too find out for us.

Before you go removing the limiter, be sure your tires can handle high speeds. The Michellin Symmetries that come stock are only rated for 120mph.
_________________________
-Steve

2006 Audi A6 ~132k miles, stock.
1998 Mercury Grand Marquis LS HPP ~100k miles, slowly acquiring modifications.
1997 Town Car Cartier ~145k miles, Ported Plenum, Gutted Airbox, Contour E-fan Retrofit, Dual exhaust with Magnaflows, cats deleted, MSD Ignition, KYB Gas-A-Justs, P71 front bar, air ride reinstated, Projector retrofit, Caddy 4-note horn retrofit, Wood rim steering wheel retrofit, holistic weight reduction as the parts fall off..
1996 Mercury Grand Marquis GS 117,485mi. R.I.P. 7/14/12 frown

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#2111902 - 08/08/10 08:34 PM Re: Speed limiter [Re: BigMerc96]
Bonekrosha Offline
Member

Registered: 04/09/10
Posts: 213
Loc: Tennessee
My understanding is that you'll need a Po-Leece driveshaft too.
Apparantly, the Civilian Crown Vics have driveshafts that are not properly balanced or are constructed in such a way as to no be stable over 110mph and that's part of the reason they are limited.
The limiters on these things seem to be all over the place:
My Wife's P-74 HPP 94 would shut off at 110.
My 94 P-71 (my old Patrol Car would max out at about 125 when it was my patrol vehicle because the trans was geared lower than stock and it had a big Streethawk light bar. Without the lightbar, it would run a speedo indicated 130-ish. It never hit a limiter, it just would wind out and that's as fast as it would go.
My 2001 Patrol Car saw 139 on RADAR (I was running after a Vette laaate one night, with no other trafic on the road, the speedo indicated just at 140) it never hit a limiter either (I never got close to him so I let off) though they are supposedly limited from the factory at 127 I think.
All of the cars I ever drove at the Sheriff's Office would pull past 130 on the speedo without gettin ginto the limiter except for my 94, we didn't make a habit of it and it really needed to be something like an Officer Needs Assistance call for us to run like that.
Rumor had it that one of the 97's went 157 mph according to it's computer. I don't kow if that is something that can even be retrieved from the car's computer but one of the mechanics said they could pull that info up whenever they wanted to.
My 2001 P-71 I drive now shuts off at 125 speedo indicated.
_________________________
2001 P-71 Plain ole white ex-Po-Po car: 2-chamber Flowmasters with turndowns, 70mm Throttle Body, K&N Cold-Air Intake, 245/ZR50's on the front, 255/ZR50's with requisite dog dishes and trim rings. Alpine head unit to compete with the flowmasters.

Sold and still missed:
My old Beasty: 1994 P-71, my actual old Patrol Car that was auctioned off when I got my new Patrol Car in 2001. I found it on a car lot a year later for a song and sold it with 187K miles for twice what I paid for it. 2-Chamber Flowmasters with turndowns, cold air intake, 245/50's on 16" steelies with dog dishes.

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#2112027 - 08/08/10 11:25 PM Re: Speed limiter [Re: Bonekrosha]
1 Adam 12 Offline

Over the Hill

Registered: 07/04/01
Posts: 1756
Loc: Glendale, AZ
Even with the MMC or Aluminum driveshaft, the driveshaft can polevault after 15-20 minutes of operation at 129, as Ford's tests found out.

I read this somewhere on here, don't remember where tho...
_________________________
~Chris~

2007 Smokestone LX HPP - 17.5K miles 1/2016
'05 PI Airbox/Ziptube, BOC 91 Octane Tune, PowerSlot F&R Rotors, Raybestos Police Patrol Pads F&R, 260A Mechman Alt w/OAD & Big 3, Ported Intake Plenum, Adco Front & Rear Swaybars, Metco Control Arms, Metco Watts Link, KYB Police Struts/Shocks F&R, Arnott HPP-spec "Limo" rear bags, Walker Quietflow 3's w/Resonator delete, 3.55 TracLoc conversion, 180 T-Stat, 22C Plugs, GY Eagle Sport AS Tires, Kenwood DNN992 Nav Headunit & Speakers, Viper 5901 Alarm/Remote Start & Street Guardian Dashcam

MY ARTICLES

Pulleys for Police Alternators | Replacing Door Weather Barriers | Exhaust Dampers and their importance

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#2112068 - 08/09/10 12:09 AM Re: Speed limiter [Re: 1 Adam 12]
hellraiser319 Offline
Over the Hill

Registered: 01/26/10
Posts: 1562
Loc: Moline, IL
I also heard about the wind dynamics and such, where if you hit a certain speed, due to it sitting so high off the ground the front end will start to lift as well...without some sort of spoiler on the front at least.
_________________________

Chris H.
03 CVPI & 96 Aspire, see fquick link for info
MECP Advanced - CEA170106 - Best Buy #0023 - Moline, IL
XBL, PSN, FB, FQuick, TCG = hellraiser319


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#2112103 - 08/09/10 01:10 AM Re: Speed limiter [Re: hellraiser319]
Quatrelle Offline
Member

Registered: 03/16/10
Posts: 365
Loc: The Netherlands, Europe
I miscalculated the max speed, it is 105 when the limiter kicks in. But anyway, reading all the above, I think it would be best to just let it sit as is, if I want to enjoy my car a while longer.....

Thanks all for you replies!
_________________________
Mercury Grand Marquis LS 281cu. LS 1997 > 158K miles
Renault 4 1968 4-speed 845cc.
Renault 5 TL 1983 5-speed 1008 cc.




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#2112357 - 08/09/10 12:48 PM Re: Speed limiter [Re: Quatrelle]
BigMerc96 Offline

I know nothing
Posting Addict

Registered: 06/05/10
Posts: 19868
Loc: I can see Detroit from here!
 Originally Posted By: Bonekrosha
Rumor had it that one of the 97's went 157 mph according to it's computer. I don't kow if that is something that can even be retrieved from the car's computer but one of the mechanics said they could pull that info up whenever they wanted to.
With live data scanning you can retrieve live vehicle speed, but I'm not sure about after the fact.

'97 is quite possibly the fastest p-71 top speed wise, they were Aero body which are aerodynamically stable, even at high speed. They also had 3.27 RAR, aluminum drive-shaft and an aggressive tune.

An '97 HPP Grand Marquis is potentially just as quick, it has the same axel ratio, the only difference is HPPs have the steel drive-shaft which isn't balanced as well and the tune is less aggressive.

I can tell you first hand that an Aero Grand Marquis dose not get too light at high speeds, it is actually quite stable. Compared to my Malibu which would get light at anything more than 85mph, the Marquis is very stable.
_________________________
-Steve

2006 Audi A6 ~132k miles, stock.
1998 Mercury Grand Marquis LS HPP ~100k miles, slowly acquiring modifications.
1997 Town Car Cartier ~145k miles, Ported Plenum, Gutted Airbox, Contour E-fan Retrofit, Dual exhaust with Magnaflows, cats deleted, MSD Ignition, KYB Gas-A-Justs, P71 front bar, air ride reinstated, Projector retrofit, Caddy 4-note horn retrofit, Wood rim steering wheel retrofit, holistic weight reduction as the parts fall off..
1996 Mercury Grand Marquis GS 117,485mi. R.I.P. 7/14/12 frown

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#2112404 - 08/09/10 01:38 PM Re: Speed limiter [Re: 1 Adam 12]
GrandMarq9807 Offline
Over the Hill

Registered: 05/10/10
Posts: 4420
Loc: Virginia
 Originally Posted By: 1 Adam 12
Even with the MMC or Aluminum driveshaft, the driveshaft can polevault after 15-20 minutes of operation at 129, as Ford's tests found out.

I read this somewhere on here, don't remember where tho...


If it worries you, install a driveshaft loop... I have one on my T-Bird...
_________________________
1998 Grand Marquis LS. 96K mi. .. Stock
2007 Grand Marquis GS. 90K mi. .. Stock
1996 F-150 XLT 196K mi Beater, Stock

----------My Toys---------(links are up)
1969 Fairlane Cobra 428CJ 4-Speed
1972 Comet GT Restomod 306, C4
1988 Turbo Coupe 331 AOD & 3.73 .. Pressurized ½ Motor is History

*****************NEW TOY!!!*********************
1969 Base Fairlane 302, C4, 45K mi(really!)

Now with P/S & PDB
Gonna wake it up with a Blue Print headed 347




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#2112630 - 08/09/10 06:35 PM Re: Speed limiter [Re: GrandMarq9807]
imvic Offline
Member

Registered: 06/05/10
Posts: 284
Loc: syracuse, n.y....er, durham
betcha that buick would pass the century mark in a hurry.
that thing even LOOKS fast just sitting at the curb.
_________________________
'97 CV. 77,000 and change on it. Unmolested, except for a K&N air filter, an air box mod, a really cool hood shock modification, KYB shocks, P71 front springs, cut 1/3 coil to lower it 1", HPP front and rear sway bar with poly bushings on the front, Hankook Ventus V4 ES 225/55/ZR17 front and 235/55ZR17 rear on new wheels...and a trailer hitch that adds 10 HP.

"Buy land. They've stopped making it" - Mark Twain

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#2112648 - 08/09/10 07:00 PM Re: Speed limiter [Re: hellraiser319]
JaxRhapsody Offline
Climber

Registered: 04/05/08
Posts: 846
Loc: Louisville,KY
 Originally Posted By: hellraiser319
I also heard about the wind dynamics and such, where if you hit a certain speed, due to it sitting so high off the ground the front end will start to lift as well...without some sort of spoiler on the front at least.

Thats most cars. The Op's in Germany though. The tires on his car are probably already Y-rated or whatevers 2 notched down from a Z-rated tire.
_________________________
2008 CVPI aka YankTank

Originally Posted By gplayer
"You find out you can handle the corners with the agility of a bobcat!"
While they show scenes of the car sliding through the corners, looking like the door handle is about to touch the road.

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#2112692 - 08/09/10 07:59 PM Re: Speed limiter [Re: JaxRhapsody]
trife86 Offline
Member

Registered: 07/04/05
Posts: 231
Loc: NYC
Ill tell ya what my old 93 CVPI with a 3.08 rear was crazy on highway. I hit a higher top end than in both my 99 and 05..
I almost pegged that speedo had it at around 135 GPS verified
_________________________
1999 CVPI Stock 3.55L rear end.
15.3 @ 88.9mph

2005 CVPI BOC tuned by Lonnie - 87oct

2012 Subaru WRX. Tuned.

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#2113686 - 08/11/10 02:47 AM Re: Speed limiter [Re: imvic]
Quatrelle Offline
Member

Registered: 03/16/10
Posts: 365
Loc: The Netherlands, Europe
 Originally Posted By: imvic
betcha that buick would pass the century mark in a hurry.
that thing even LOOKS fast just sitting at the curb.


It does, 370 hp and 510 torque! It is really powerfull with the 455 in it. Sold it 3 weeks ago and bought the '77 MGM in return. It was half the price of what I got for the Riv.

Anyone knows what the 460 of my 1977 MGM is good for? I heard it only has about 210 hp due to emission restrictions. No easy way to tickle it more I guess?
_________________________
Mercury Grand Marquis LS 281cu. LS 1997 > 158K miles
Renault 4 1968 4-speed 845cc.
Renault 5 TL 1983 5-speed 1008 cc.




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#2744241 - 08/10/13 02:48 PM Re: Speed limiter [Re: Quatrelle]
tigman5356 Offline
Rookie

Registered: 02/12/12
Posts: 50
Loc: brookings SD
my speedo on my 94 cvpi has seen 125 and another time it hit 121 on gps ran outta road
_________________________
2006 light metallic blue cvpi 113000 miles 3.27 gears trac lock
2000 white cvpi 109xxx miles, 2005 cvpi engine swap done!!
94 cvpi R.I.P.

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