So, regarding top speeds again. - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


1987-1991 Parley with regards to your 1987 to 1991 Bonneville, Olds 88 or Buick Le Sabre Please use General Chat for non-mechanical issues, and Performance and Brainstorming for improvements.

Reply
 
 
 
Thread Tools Search this Thread
Old 08-22-2006, 01:31 AM   #1
Senior Member
Posts like a Turbo
Thread Starter
 
Join Date: May 2005
Location: Fredericton, New Brunswick.
Posts: 380
Thanks: 0
Thanked 1 Time in 1 Post
Timothy's Buick is on a distinguished road
Default So, regarding top speeds again.

I took the LeSabre out for a spin on the highway, and tried to see how fast I could go. (don't worry, it was safe)

Since my speedo only goes to 160 KPH, which is... (sorry, have no idea what thats in MPH) I cannot see what the top speed of the car is.

I had the pedal buried to the floor, and it seemed to go fast. Buried the speedo, but the tachometer stopped at arounds 4300 rpm, and would not increase.

I'm not even sure what gear it was in, or if it was in OD, but how fast would that be now?
Timothy's Buick is offline   Reply With Quote
Old 08-22-2006, 01:42 AM   #2
Senior Member
True Car Nut
 
Join Date: Jul 2004
Location: Twin Falls, Idaho
Posts: 7,545
Thanks: 0
Thanked 1 Time in 1 Post
Hans is on a distinguished road
Default

I'd imagine 108 MPH is the max.
Hans is offline   Reply With Quote
Old 08-22-2006, 05:21 AM   #3
Senior Member
Posts like a Corvette
 
Join Date: Jun 2005
Location: Berkeley, IL
Posts: 1,596
Thanks: 0
Thanked 0 Times in 0 Posts
DarkShadow is on a distinguished road
Default

the old ln3 dosent have a speed limiter, just a fuel cutoff at the redline...

i had mine a little past 115 then i let off
DarkShadow is offline   Reply With Quote
Old 08-24-2006, 06:07 PM   #4
Senior Member
Posts like a Camaro
 
Join Date: Oct 2003
Location: Hamilton, Ontario
Posts: 1,074
Thanks: 0
Thanked 0 Times in 0 Posts
phoenix_flame220 is on a distinguished road
Default

One member had theyre car up to 240 km/h, you were probably at 200km/h or so
phoenix_flame220 is offline   Reply With Quote
Old 08-27-2006, 05:35 PM   #5
Junior Member
 
Join Date: Aug 2006
Posts: 2
Thanks: 0
Thanked 0 Times in 0 Posts
Falisa is on a distinguished road
Default

lol Just saw this while scanning over the forum... I got my 1989 Bonneville to 110 but let off. :o
Falisa is offline   Reply With Quote
Old 08-27-2006, 10:05 PM   #6
Senior Member
True Car Nut
 
Join Date: Feb 2005
Location: Brampton, Ontario
Posts: 3,014
Thanks: 0
Thanked 0 Times in 0 Posts
Maymybonnieliveforevr is on a distinguished road
Default

There is a rev limiter, so shouldn't top speed be basically the same?
Maymybonnieliveforevr is offline   Reply With Quote
Old 08-27-2006, 10:28 PM   #7
Junior Member
 
Join Date: Jun 2002
Posts: 0
Thanks: 0
Thanked 0 Times in 0 Posts
2000SilverBullet is on a distinguished road
Default

Yes, the rev limiter with * rated tires would be set at 108 mph. That corresponds roughly to 4300 in 3rd gear.
2000SilverBullet is offline   Reply With Quote
Old 08-28-2006, 02:05 AM   #8
Senior Member
Posts like a Turbo
Thread Starter
 
Join Date: May 2005
Location: Fredericton, New Brunswick.
Posts: 380
Thanks: 0
Thanked 1 Time in 1 Post
Timothy's Buick is on a distinguished road
Default

Ok, 108 MPH is 160-170 KPH. Thats in third gear, and at 4300 RPM.

Now, if i were to disconnect the TV cable, wouldn't the tranny go right to 160 KPH (100 MPH) and stay in 4th gear, TCC in? Wouldn't it be able to go faster, or would the fuel cut-off still limit the vehicle speed?

NEXT QUESTION... How do i go faster? (speed rated tires of course) But what else?

One thing'* for sure. Compared to most other small import or domestic cars, The buick feels VERY secure at high speeds, even with the stock 205/75/r14 tires. lol
Timothy's Buick is offline   Reply With Quote
Old 08-28-2006, 11:52 PM   #9
Junior Member
 
Join Date: Jun 2002
Posts: 0
Thanks: 0
Thanked 0 Times in 0 Posts
2000SilverBullet is on a distinguished road
Default

The only way I know of defeating the speed limiter is to have the PCM reprogrammed.

I have noticed that these cars do feel very stable up to about 140 mph but over 150 and the back end starts to feel loose. You probably won't have to worry about being able to exceed 140 mph (220 kph).
2000SilverBullet is offline   Reply With Quote
Old 08-29-2006, 02:57 AM   #10
Senior Member
Posts like a Camaro
 
Join Date: Oct 2003
Location: Hamilton, Ontario
Posts: 1,074
Thanks: 0
Thanked 0 Times in 0 Posts
phoenix_flame220 is on a distinguished road
Default

From my understanding, these cars do not have a PCM speed limiter. Not everything is electronically controlled like the newer models.
phoenix_flame220 is offline   Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
Brake pedal low again and again and again NMP1 GMC/Chevrolet Truck/SUV 2 07-17-2015 11:56 AM
Top Ten Obama Top Jabs GXP Venom Lounge 4 04-05-2010 07:28 PM
Series II L67 O-60 speeds Custom88 Performance, Brainstorming & Tuning 20 06-16-2003 10:55 PM
What are some N/A 1/4 times and trap speeds? brminder Performance, Brainstorming & Tuning 17 05-20-2003 10:57 PM


Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off



All times are GMT -4. The time now is 11:43 PM.


We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.