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turtleman
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PostSubject: Speed Governor   Thu Mar 08, 2007 10:56 pm

I understand that my speed is governed to about 110-115mph so my question is what's the remedy for that? And can I do anything with it without buying PCMs and such
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PostSubject: Re: Speed Governor   Thu Mar 08, 2007 11:00 pm

109

Use a light throttle foot and keep OD engaged and you'll top that, but don't burn up the OD gear.
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98riv
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PostSubject: Re: Speed Governor   Thu Mar 08, 2007 11:05 pm

The only way to get past it is to disable it in the pcm. It is set at 108 because of the speed rating on the stock tires.

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turtleman
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PostSubject: Re: Speed Governor   Thu Mar 08, 2007 11:07 pm

98riv wrote:
The only way to get past it is to disable it in the pcm. It is set at 108 because of the speed rating on the stock tires.

I thought the governor was like a centrifugal device on the trans or is that just old school stuff
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98riv
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PostSubject: Re: Speed Governor   Thu Mar 08, 2007 11:09 pm

turtleman wrote:
98riv wrote:
The only way to get past it is to disable it in the pcm. It is set at 108 because of the speed rating on the stock tires.

I thought the governor was like a centrifugal device on the trans or is that just old school stuff

Nope not in our cars. Aaron can confirm this because he has a powertuner, but there is a setting in the pcm where you can set the speed limiter.

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turtleman
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PostSubject: Re: Speed Governor   Thu Mar 08, 2007 11:21 pm



Are you saying you can adjust the speed limit setting on any stock OBDII pcm or just the aftermarket ones ie. powertuner?
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AA
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PostSubject: Re: Speed Governor   Fri Mar 09, 2007 9:01 am

There is no need to replace your PCM if you get a tuner (aftermarket PCMs are just stock ones that have been reprogrammed). With a tuner, you keep the OEM (physicall), you just re-write the code. Since a PCM is just code, really, it's technically not stock after you do this.

OEM limit setting is 108 mph. With PowrTuner, mine's now at 168 mph (the speed rating of my tires), but it's still the original PCM unit, just has a new BIN pregram. All OBDI PCMs can be changed, as long as DHP (or another company) makes a BIN for it.

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PostSubject: Re: Speed Governor   Fri Mar 09, 2007 9:15 am

108? i think mine is 112 scratch lol i've heard if you use higher octane fuel and ease into it with OD on (like racefan said) it is possible to achieve a higher speed, but im never patient enough to slowly ease up to speed on highways. stock tires were S rated right? thats a max sustained speed of 112. (maybe thats where i got the 112 from). its difficult to see exactly where the speedo hits b/c it goes up then drops off fast when the limiter hits.

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PostSubject: Re: Speed Governor   Fri Mar 09, 2007 9:25 am

Some get going down a hill with the wind at their back, and may roll to higher speeds, but the cut-off is 108 mph.

Another big mistake people make (and probably the reason for this whole discussion) is to use their dash speedometer to monitor speed, which is often slightly off, more so the faster you go. For example, mine reads 70 mph when my scanner says 67. My tach is the same way. It's nearly impossible to align the needle and marks exactly during the assembly process.

Doesn't matter how slowly you ease into it, or what gear you're in... when the PCM sees 108, you're getting shut down. And going that fast on stock tires is completely nuts. Two of my OEM Michelins (the good ones) literally tore apart at 80 mph before I replaced the set. Junk tires, imo.

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'98 SC Riviera 268k miles 298 HP/370 TQ 0-60: 5.79s ET: 13.97 @ 99.28 4087 lb 20.1 avg MPG Nelson Ledges Lap: 1:30
3.4" pulley AL104 plugs 180 t-stat FWI w/K&N 1.9:1 rockers OR pushrods LS6 valve springs SLP headers ZZP fuel rails
KYB GR2 struts MaxAir shocks Addco sway bars UMI bushings GM STB Enkei 18" EV5s w/ Dunlop DZ101s F-body calipers
EBC bluestuff/Hawk HP plus SS lines Brembo slotted discs DHP tuned Aeroforce Hidden Hitch


'05 GTO 49k miles 0-60: 4.8s 16.9 avg MPG Nelson Ledges Lap: 1:26
Because fun
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T Riley
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PostSubject: Re: Speed Governor   Fri Mar 09, 2007 11:06 am

i have HRI's fusions are those rated for that kinda speed??
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Mr.Riviera
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PostSubject: Re: Speed Governor   Fri Mar 09, 2007 1:28 pm

whats the letter on them? H is rated for 130mph

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Last edited by on Fri Mar 09, 2007 1:29 pm; edited 1 time in total
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AA
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PostSubject: Re: Speed Governor   Fri Mar 09, 2007 1:28 pm

I think the Fusion HRIs are H-rated. Good up to 130 mph.

_________________
'98 SC Riviera 268k miles 298 HP/370 TQ 0-60: 5.79s ET: 13.97 @ 99.28 4087 lb 20.1 avg MPG Nelson Ledges Lap: 1:30
3.4" pulley AL104 plugs 180 t-stat FWI w/K&N 1.9:1 rockers OR pushrods LS6 valve springs SLP headers ZZP fuel rails
KYB GR2 struts MaxAir shocks Addco sway bars UMI bushings GM STB Enkei 18" EV5s w/ Dunlop DZ101s F-body calipers
EBC bluestuff/Hawk HP plus SS lines Brembo slotted discs DHP tuned Aeroforce Hidden Hitch


'05 GTO 49k miles 0-60: 4.8s 16.9 avg MPG Nelson Ledges Lap: 1:26
Because fun
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NO 4 EVR
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PostSubject: Re: Speed Governor   Fri Mar 09, 2007 3:21 pm

AA wrote:
Some get going down a hill with the wind at their back, and may roll to higher speeds, but the cut-off is 108 mph.

Another big mistake people make (and probably the reason for this whole discussion) is to use their dash speedometer to monitor speed, which is often slightly off, more so the faster you go. For example, mine reads 70 mph when my scanner says 67. My tach is the same way. It's nearly impossible to align the needle and marks exactly during the assembly process.

Doesn't matter how slowly you ease into it, or what gear you're in... when the PCM sees 108, you're getting shut down. And going that fast on stock tires is completely nuts. Two of my OEM Michelins (the good ones) literally tore apart at 80 mph before I replaced the set. Junk tires, imo.

I agree. My bonnie with the HUD would always read a different reading between HUD and speedo. Lower readings the speedo was off until about 60 and then it was off again. I see a difference in the tach gauge too. Probably all analog guages are off to some degree. But I noticed my bonnie would calibrate the guages at each startup (go all the way up then all the way down and then to where it reads whatever it is reading.) Does the Riv do calibration of some sort?
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PostSubject: Re: Speed Governor   Sat Mar 10, 2007 8:57 pm

AA wrote:
I think the Fusion HRIs are H-rated. Good up to 130 mph.

sweet now i really have a reason to take off govenor
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RhinoFLA
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PostSubject: 105 mph   Sun Apr 08, 2007 5:20 pm

I went up to sarasota for the weekend, which is about a two hour drive from my house, so I took i-75 which is a pretty wide open interstate. I haven't really gotten on my riv in a while, so I decided to open her up, I went from 70 to 100 no problem, then im coming up on 105, and it just cuts out completely, I try again, same thing.. Have any of you gotten over 105? or are riv's governed at 105?
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PostSubject: Re: Speed Governor   Sun Apr 08, 2007 5:30 pm

The govenor is set at 107 I thought.. If you know someone with a tuner they can changed that.
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RhinoFLA
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PostSubject: Re: Speed Governor   Sun Apr 08, 2007 5:32 pm

ah well 107, it was right around there. tuners are mad expensive though right
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PostSubject: Re: Speed Governor   Sun Apr 08, 2007 5:51 pm

I think they are about $4-500 not sure. ZZP or Intense sell PCMs for like $150? They could probably change that for you if you tell them when you order it.

You should see if someone near you has a tuner before you go out and spend money for one.
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PostSubject: Re: Speed Governor   Sun Apr 08, 2007 6:15 pm

Aren't tuners pretty much locked in to one model/year?
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PostSubject: Re: Speed Governor   Sun Apr 08, 2007 6:32 pm

I'm not sure. I know over at massclubgp they help eachother with the tuners but maybe the have the same year.
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PostSubject: Re: Speed Governor   Sun Apr 08, 2007 6:46 pm

my riv is governed at 108 MPH
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PostSubject: Re: Speed Governor   Sun Apr 08, 2007 8:26 pm

i thought it was 108 too. but i think i've hit 110+ easing into the throttle.

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1996 with 244k miles, L324" FWI -> ported N* -> Ported Gen V w/3.0" Pulley, Stage 3 Phenolic I/C, ZZP FMHE, 1.84 RR, Headers and 3" pipe to mufflers, F-body brakes, and lowered on Eibachs.
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PostSubject: Re: Speed Governor   Sun Apr 08, 2007 8:48 pm

ey mr. riv, you're in orlando happy cmonnn hook it up with a tuner lol. i'm sure you know how i-75 is
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Mr.Riviera
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PostSubject: Re: Speed Governor   Sun Apr 08, 2007 9:00 pm

i wish i had one! wana split a 96 pcm bin? smile
i have a scanner and a bunch of friends with tunners but none of them will work with the riv frown

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1996 with 244k miles, L324" FWI -> ported N* -> Ported Gen V w/3.0" Pulley, Stage 3 Phenolic I/C, ZZP FMHE, 1.84 RR, Headers and 3" pipe to mufflers, F-body brakes, and lowered on Eibachs.
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PostSubject: Re: Speed Governor   Sun Apr 08, 2007 9:02 pm

lol if we split on it, we'll end up in a huge custody battle man.. and no one wants that :/
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