Northstar Engines and System Technical Discussion Discussion, 130mph?? in Cadillac Engine Discussion; Ive read on hear alot of people w/ '94 - '97 seville sls and sts say their car will go ...
- 05-14-06 05:51 PM #1
Ive read on hear alot of people w/ '94 - '97 seville sls and sts say their car will go 130mph or 140mph!??
my '97 sls cuts off at 110mph or so?
how do yall go 130mph?
did yall do a mod or something, enlighten me please
- 05-14-06 07:10 PM #2Cadillac Owners Connoisseur
- Automobile(s): '98 STS (RIP @ 206,xxx miles)
- Join Date
- Sep 2003
- Metro ATL
Vehicle speed is limited by the PCM according to the speed rating of the OEM tires installed by GM/Cadillac. Look for the OEM tire speed rating on the tire information sticker (driver's door panel ?).
- 05-14-06 07:25 PM #3
Re: 130mph??Originally Posted by JimD
thanks for responding so quickly....
the letter is "S" for front and rear
so what does "S" stand for, and is there any way to change the code in the comp. to make it go a little faster?
- 05-14-06 07:53 PM #4
S simply means that the tires ORIGINALLY placed on your car, at the factory, are 'speed rated' (a MFG thing, not a carmaker or Gov't thing) to 112 mph. Thus, the PCM on your car was tickled to limit the car's speed to that.
There is no practical way to increase that. Putting H or Z rated tires on will do nothing. The PCM would have to be reprogrammed by a dealer, and common knowledge seems to be that, unless YOU are the dealer, it will not be done. Liability issues.
Live with 112 or get a different car and check the door sticker.
Sorry, but that's the way it is. My ETC has H rateds from the factory, so I'm limited to around 130. The RARE Z-rated cars will hit 150.
- 05-14-06 10:20 PM #5
Re: 130mph??Originally Posted by 1997 Cadillac SLS
Sorry, couldn't resist.
- 05-14-06 10:43 PM #6
Haha, wow ranger I never see that type of comedy out of you. Haha.
- 05-14-06 10:52 PM #7
Re: 130mph??Originally Posted by Ranger
- 05-14-06 11:02 PM #8
yeah I know 110mph top speed is pretty slow, civics can blow past me on the beltway HAHAHA...oh well~
- 05-15-06 09:00 PM #9
I ran my 2001 STS up to 120 mph the other day and it got there fairly easily , so I thought it would have a 140 mph capability . the next day when I gave it a whirl it cut out @ 130 mph . It would have done the 140 if allowed but not much more.
- 05-15-06 11:15 PM #10Cadillac Owners Enthusiast
- Automobile(s): 1998 Cadillac Deville Sedan
- Join Date
- Feb 2005
So if I give the dealer some money I can have them reprogram my PCM to have 130mph limit? My car cuts off at 112mph and I just got some Goodyear's rriple tread assurance tires are are rated H I think.
- 05-15-06 11:21 PM #11
ah... that '93 STS I was looking at here is Z rated.....
make some good time going back to NY...
- 05-16-06 12:52 AM #12Cadillac Owners Fanatic
- Join Date
- Jan 2004
- Minneapolis area
I've had my 95 sts pegged at the 150 mark. Your best bet is to get a vin# off of ebay from a car that was originally equipped with "z" tires. Go into a Caddy dealer, walk straight into the shop and look for the "cool" dude. Flip him a $50 and ask him to reprogram your car.
- 05-16-06 01:09 AM #13
Feels good to have a Z rated caddy. 150+ mph for me.
- 05-16-06 01:02 PM #14
Re: 130mph??Originally Posted by weister42
- 05-16-06 01:09 PM #15Cadillac Owners Member
- Automobile(s): '94 Seville STS
- Join Date
- Apr 2005
- Kalkaska, MI
Only the "Z rated" Caddys can hit speeds over 130MPH. Check your door sticker. If yours is "Z rated", then you have no speed limiter.
Not that I'll ever hit those speeds in my car, but it sure is nice to know that I could.