Engine/Transmission (1998.5 - 2002) Top Speed Limiter

[kswieringa]

How can one change the top speed limiter? I want nothing holding me back in the 1/4 mile

 

[Mundgyver]

Insall one of these and change your tire size electrically and fool the ECM.



http://www.atrol.com/era.htm



I have been to 131 mph according to my GPS on a long straight freeway in Eastern Washington If I put in a set of 4,000 rpm valve springs, I should be able to get close to 145. Tires are the scarry part though.

 

[kswieringa]

I was hoping for a more permanent solution at the ecm where my spedo would be correct

 

[Mundgyver]

It has been several years, but somewhere there was a thread about this. I seem to remember that the individual disabled an Orange with White Stripe wire which supposidly provided the speed input to the ECM. I think they did it with a simple toggle switch. What this does the to system overall, I am not sure. I do not remember what the thread was titled or who started it, hopfully some one will chime in. If you have the factory manual for your truck, you should be able to find the circuit and experiment.

 

[Cummins Thunder]

How about a BD RAD (Racing Anti Defueler)??



CJ

 

[kswieringa]

I believe the De-fueler only applies to upper RPM limit. My Drag comp removes that. I am interested in not being shut down at 115mph

 

[Cummins Thunder]

I meant THIS product, and not the RAD.

How fast are you running the quarter mile(mph)?

My truck will run 111 mph(on the highway).



BYW, the RAD gets rid of torque management (defueling that happens during 1st and 2nd gear).



CJ

 

[kswieringa]

No time slip yet . Feels like low low 13's

 

[SKneeland]

interesting, my truck does not, nor has ever had any speed limiter



only restriction is the rpm governor





wonder if thats just something they do for the trucks south of the border.....

 

[kswieringa]

How fast will your truck go at what rpm?

 

[Mundgyver]

Speed limiter is interesting. I have 285 size tires on my truck and the Abbott corrects for the tire size. When I did my speed run against the Mercedes and hit 131 mph, I was not speed limited, but was tached out at 3,300 rpm according to my Roadrelay. That was the wall for me. Now that I have the Smarty software for the ECM, I know I can up the speed, but I need to upgrade my valve springs and the tires for sure.



What are the guys doing in the competition forum that drag on a regular basis and getting into the 12's and 11's. I know Rip at Source Automotive has one of the faster trucks, he might be a good source of info for you to contact and ask questions about this subject.

 

[kswieringa]

Is the top speed limiter adjustable or removable with the SMARTY???

 

[Mundgyver]

http://www.wagnerandassociates.biz/



This is the guy that can answer the questions, give him an email or look him up, his name is BOB Wagner

 

[SKneeland]

How fast will your truck go at what rpm?

it will redline with 3. 54 gears and 35" tires



guessing, 200k/120mph +





on a further note, pulling the fuse for the abs should disable any speed limiter, it shuts down your speedo/odometer... ...

 

[johncameron]

Mine did 3300RPM+ at just over 120MPH. I found out and I don't need to do it again, man that is faaaaaaast!!

 

[Cummins Thunder]

Mine is turnin' 1900 @ 70mph



CJ