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Speed limiter delete

Stephen L. Pannell
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eppieguy
eppieguy

Maybe 

Silverado4x4
Silverado4x4

Tires and driveshaft. Once a driveshaft comes out of balance at those speeds it will destruct with in seconds.

CamGTP
CamGTP

They do make one.   It requires voiding your warranty and spending a minimum of $1,900 to purchase a new unlocked computer from HP Tuners and the credits to tune it.   I doubt you'

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AJ Sullivan Enthusiast

AJ Sullivan

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On 11/9/2020 at 2:39 PM, Stephen L. Pannell said:

Just ordered the Pulsar LT Control Module. Makes speed limiter changes up to 140mph. That should be enough :)

I think that your rear end ratio and the engine power will limit you right before then.  The old police tahoes had 5.3l with 3.08 rear ends and would do 139.  The new 2021 police models have 5.3l with 3.23 ratios and show 130 as a top speed.  I'd be interested in seeing what yours will do when removed.  I'm getting my WAMS deal in the mail soon.  

AJ Sullivan Enthusiast

AJ Sullivan

Posted
Posted
14 hours ago, Colossus said:

Keep in mind the interceptor tahoes are 2WD not 4WD. 

Right... the 4WD models are limited to 121.

Rob Mugs Enthusiast

Rob Mugs

Posted
Posted
On 11/9/2020 at 2:39 PM, Stephen L. Pannell said:

Just ordered the Pulsar LT Control Module. Makes speed limiter changes up to 140mph. That should be enough :)

100 bucks more than WAMS and doesn't have nearly as many options ?

Colossus Senior Enthusiast

Colossus

Posted
Posted
On 11/13/2020 at 2:40 PM, AJ Sullivan said:

Right... the 4WD models are limited to 121.

As of 2021, 125  that's 5 MPH less than the RWD.:)  What's really sad though, is that Dodge has lowered the top speed of the 5.7L Hemi Charger Police package to 140 MPH, same as the 3.6L V-6.  Weird and disappointing to many state police agencies who liked the upper 155+ MPH top speed the Charger offered.  That now puts the Ford Explorer police Interceptor with the 3.0 Egoboost as the quickest.  148 MPH top speed, 0-60 5.75 sec. 

 

https://www.michigan.gov/documents/msp/2021PreliminaryVehicleTestData_706059_7.pdf

 

 

SILVER SLED Senior Enthusiast

SILVER SLED

Posted
Posted (edited)
On 11/12/2020 at 10:34 PM, AJ Sullivan said:

I think that your rear end ratio and the engine power will limit you right before then.  The old police tahoes had 5.3l with 3.08 rear ends and would do 139.  The new 2021 police models have 5.3l with 3.23 ratios and show 130 as a top speed.  I'd be interested in seeing what yours will do when removed.  I'm getting my WAMS deal in the mail soon.  

I had my ‘15 ccsb 5.3, 6 speed 4x4 with 3.42 gears going 135.  It was still climbing at 135, but I let off.  

Edited by SILVER SLED
  • 3 weeks later...
AJ Sullivan Enthusiast

AJ Sullivan

Posted
Posted

Has anyone with a T1 CCSB deleted the speed limiter and run it up?  How high did you get it and how did it feel?  I am still waiting on mine to get done. 

jddealer Enthusiast

jddealer

Posted
Posted (edited)
4 hours ago, AJ Sullivan said:

Has anyone with a T1 CCSB deleted the speed limiter and run it up?  How high did you get it and how did it feel?  I am still waiting on mine to get done. 

I can't find it right now, but somewhere on YouTube there is a vid of one going 148 that has some upgrades.  Not sure what they removed the limiter with, but that's the speed they shut down at.

{edit} Looks like it was a 2018 model, now that I found the video

 

Edited by jddealer
update
  • 4 weeks later...
Stephen L. Pannell Enthusiast

Stephen L. Pannell

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I set mine to 130 although the speedometer goes to 140. Took it to 120 and it was rock solid and still climbing fast. No doubt in my mind that it would peg 140 if I so chose. What I like most is the throttle sensitivity increase. No lag whatsoever and even seems to change the trans mission up shift and downshift points. Full power now at the hit. Got to be careful because it will break the tires loose under 40 mph.

Once I replace these T rated tires with some new H rated Bridgestone shoes I won't be nervous about taking it all the way. 

  • 5 months later...
Mike Bradberry New Member

Mike Bradberry

Posted
Posted

It has zero to do with truck packages. It's strictly tire rating issues.  I have a 2021 AT4 with the 18" rims and my brother has a 2021 AT4 with the 20" rims. I cut out at 98 and his cuts out at 112ish.  

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Rob Mugs Enthusiast

Rob Mugs

Posted
Posted
1 hour ago, Mike Bradberry said:

It has zero to do with truck packages. It's strictly tire rating issues.  I have a 2021 AT4 with the 18" rims and my brother has a 2021 AT4 with the 20" rims. I cut out at 98 and his cuts out at 112ish.  

Yep

 

Had a guy on here arguing up a storm about it.  I ended up getting WAMS which came with a ton of other things added

GTPprix Senior Enthusiast

GTPprix

Posted
Posted
1 hour ago, Mike Bradberry said:

It has zero to do with truck packages. It's strictly tire rating issues.  I have a 2021 AT4 with the 18" rims and my brother has a 2021 AT4 with the 20" rims. I cut out at 98 and his cuts out at 112ish.  

Well to be completely honest its considerably more involved than just the tire rating; many of these trucks have tires rated well beyond the top speed they are limited at. The Trucks actually have several limiters and whatever one is the lowest is the one the system utilizes. Generally this is the transfer case limit or everyones favorite the driveshaft limit 😉 If you hang around long enough with the high speed guys about 50% of the time they have a driveshaft pretzel horror story lol

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TNTSierra Senior Enthusiast

TNTSierra

Posted
Posted

My 2018 Sierra SLT 6.2L with 8 speed, Gibson Catback exhaust, S&B CAI, and Hypertech power programmer hit 130 MPH in a breeze, but my tires were only rated for that speed so that’s where I set the speed limiter too. 

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