The Saleen Forums at soec.org header image

Go Back   The Saleen Forums at soec.org > Saleen Mustang Discussions > 2008-2009 Racecraft Mustang
Register FAQ Members List Calendar Mark Forums Read

2008-2009 Racecraft Mustang For discussion of the 2008-09 Racecraft 420S Mustang. Owners of the 2007-08 "Sleeper GT" can also find help here.

Reply
 
Thread Tools Display Modes
  #1  
Old 12-29-2010
Cwarre9 Cwarre9 is offline
SOEC Member
 
Join Date: Aug 2010
Location: Vacaville, CA
Posts: 24
Default Speedometer Calibration?

Does anyone have any info on calibration of the speedometer? I'm consistently 4 to 5 MPH fast. Spoke with both dealers in my area and got the "that's within tolerance" answer. I've never had this issue with any car I've owned before, so it just doesn't seem right. May be the best I can get, but thought I'd ask the experts here.
__________________
Cliff
2009 Racecraft Mustang
Reply With Quote
  #2  
Old 12-29-2010
Dave's Avatar
Dave Dave is offline
Administrator
 
Join Date: Feb 2006
Location: Penn
Posts: 11,909
Default

The 2008-09 Racecraft Mustang used a 180MPH gauge face. The 2007 PJ and 2007-08 Heritage series also used a 180MPH face. Both 2007 PJ and 2007 S281 Heritage are known for having their clusters calibrated incorrectly.

Speak with SPV warranty and see if your cluster can be re-calibrated.
Reply With Quote
  #3  
Old 12-29-2010
David Rivard David Rivard is offline
Saleen Staff Users
 
Join Date: Dec 2009
Location: Clinton Twp
Posts: 29
Default

Cwarre9,

I cal all the clusters here at Saleen and it is very typical to vary 2-3 MPH slow or fast , but the PJ had speedos that were anywhere from 5-10 MPH slow in which the owners were receiving speeding tickets . It may not be the cluster that is off, it also could be the number of revs per mile programmed in the VID block of the PCM.

Last edited by David Rivard; 12-29-2010 at 02:04 PM.
Reply With Quote
  #4  
Old 12-29-2010
Cwarre9 Cwarre9 is offline
SOEC Member
 
Join Date: Aug 2010
Location: Vacaville, CA
Posts: 24
Default

Quote:
Originally Posted by Dave Rivard View Post
Cwarre9,

I cal all the clusters here at Saleen and it is very typical to vary 2-3 MPH slow or fast , but the PJ had speedos that were anywhere from 5-10 MPH slow in which the owners were receiving speeding tickets . It may not be the cluster that is off, it also could be the number of revs per mile programmed in the VID block of the PCM.
Thanks Dave;

Thanks for the response... Mine is running a little more than 3, I've had three different GPS units in the car and they all read close to the same. The speedometer is reading high, so I'm adding miles (if the odometer is connected to the speedometer) at the rate of 4 to 5 extra miles each hour. Plus, I seem to have everyone in California passing me on the freeway. Okay, bad point - it is California!

Thanks again. Looks like I'll have to live with it.

Cliff
__________________
Cliff
2009 Racecraft Mustang
Reply With Quote
  #5  
Old 12-29-2010
Meikol02's Avatar
Meikol02 Meikol02 is offline
SOEC Member
 
Join Date: Oct 2008
Location: Seabrook, TX
Posts: 944
Default

Quote:
Originally Posted by Cwarre9 View Post
Does anyone have any info on calibration of the speedometer? I'm consistently 4 to 5 MPH fast. Spoke with both dealers in my area and got the "that's within tolerance" answer. I've never had this issue with any car I've owned before, so it just doesn't seem right. May be the best I can get, but thought I'd ask the experts here.

My car runs the same delta as yours, but I have never tried to correct it.
__________________
Michael
'07-0449
S281 SC Coupe - 1 of 1 as optioned
Reply With Quote
  #6  
Old 01-01-2011
S281SC Coop S281SC Coop is offline
Senior Saleen Forums Participant
 
Join Date: Nov 2005
Location: Northern Ohio area
Posts: 297
Default

I had the same issue with the clock on the dash running at a different speed than what my GPS unit was telling me I was going. A couple things are going to affect, the first being your rear-end gear ratio. If you have a hand held tuner (SCT) you need to hook it up and be sure you have the correct ratio "loaded" into the cars computer. The second thing that is going ot affect it is your tires RPM (revoultions per mile) this is something you can toy around with but you have to reload it everytime you change the perameter.

http://www.discounttiredirect.com/di...foTireMath.jsp

If I remember correctly mine was set around 735 and this was way off. my clock was telling me I was going 70 and my GPS said I was only doing 66,,,67. but taking that 735 number higher I was finally able to get my GPS and clock to agree on the same speed. Good luck

QWKENUF
Craig
Reply With Quote
  #7  
Old 01-02-2011
Barricade's Avatar
Barricade Barricade is offline
SOEC Member
 
Join Date: Jul 2009
Location: Texas
Posts: 1,755
Default

You can adjust the Revs per mile (tire size) in your tune which would fix that.
__________________
-ǝsınƃsıp uı ʇoqoɹ-
BARRICADE 643
06-108E
Reply With Quote
  #8  
Old 01-02-2011
S281SC Coop S281SC Coop is offline
Senior Saleen Forums Participant
 
Join Date: Nov 2005
Location: Northern Ohio area
Posts: 297
Default

That is correct. Although I found, I still had to use a higher number than (the rpms from) that website said I should be at. I dont know why that is. That is the reason I said you can toy around with it to ....its more to "fine tune" it actaully
Reply With Quote
  #9  
Old 02-22-2011
goldy goldy is offline
Registered User
 
Join Date: Apr 2009
Location: Toronto, Canada
Posts: 2
Default

I have an 06 S281 Canadian version and i was stopped for speeding because my speedo was out by 10%. So when I was doing 119km/hr i was actually doing 131 which caused me to be charged with 30km over the limit> I was not a happy camper, so i guess it happens, now i just keep it inside the speed limits and usually don't get bothered.
Reply With Quote
  #10  
Old 02-22-2011
goldy goldy is offline
Registered User
 
Join Date: Apr 2009
Location: Toronto, Canada
Posts: 2
Default

also when i had my car tuned it was found that my tach is off about 4-500 rpm at 6000 as well< i have to watch that too< just the fun of having something that's not "stock"
Reply With Quote
  #11  
Old 05-16-2012
OneQwkStang's Avatar
OneQwkStang OneQwkStang is offline
Registered User
 
Join Date: May 2011
Location: Ontario, Canada
Posts: 1,270
Default

Quote:
Originally Posted by goldy View Post
I have an 06 S281 Canadian version and i was stopped for speeding because my speedo was out by 10%. So when I was doing 119km/hr i was actually doing 131 which caused me to be charged with 30km over the limit> I was not a happy camper, so i guess it happens, now i just keep it inside the speed limits and usually don't get bothered.
Mine reads 10 km/h slower too.....
Reply With Quote
  #12  
Old 05-16-2012
panohodges panohodges is offline
Saleen Forums Participant
 
Join Date: May 2010
Location: Charlotte, North Carolina
Posts: 19
Default

I had the same issue. Ran about 5-10 MPH slower than speedometershowed. I had the car tuned on dyno and its been dead on with 2 GPS units and a phone app over the last 6 months.

I had gone to 2-3 ford dealerships and was told there was nothing they could do. They all suggested putting it on dyno to recalibrate.
Reply With Quote
Reply

Bookmarks

Thread Tools
Display Modes

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 On

Forum Jump


All times are GMT -4. The time now is 06:23 AM.


Orders placed through these advertiser links help to support SOEC and this website.

Tire Rack Wheel Clearance

When you buy one Valeo® ULTIMATE™ Wiper Blade from Tire Rack, you'll get one free!

Dunlop $50 Rebate


| SOEC.ORG | ABOUT SOEC | MEMBERSHIP | SHOWROOM | LITERATURE | VEHICLE PRODUCTION | THE SALEEN TRADER | SALEEN AUTOMOTIVE | CONTACT SOEC | SOEC @ FACEBOOK |


All Original Content Copyright © 1991-2021 Saleen Owners and Enthusiasts Club, LLC (SOEC). All Rights Reserved.
SOEC is the official independent, non-profit organization for owners and enthusiasts of vehicles by Steve Saleen and Saleen Automotive, Inc.