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Westers Tune 8.1

2001rotax800

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2001rotax800 Enthusiast

2001rotax800

Posted
Posted

I have a tune waiting in my garage to be put it. I just got the truck last week and wanted to drive it a bit before I put the tune in, so I see what I wuold notice different. If anyone has some comments please post them. I already know that the 8.1 is a friggin moster :cool: I guess when I get a few minutes I will toss her in and see, Thanks

Paulie G Enthusiast

Paulie G

Posted
Posted

I have to say I was a little disappointed with mine. I removed most of the torque management and I think I did the 87-89 tune and tire correction to 265/75/R16. I don't think I felt much power difference and my gas mileage didn't change at all.

 

I specified mileage more important than power.

 

The shifting did get more firm and I think that is where I feel the slight power gain.

 

Lot of money for the results.

 

I am going to put 285 or 305 tires on and get a retune for the tire correction. I might step up to a more aggressive tune.

 

I'm not complaining about lack of power by any means, but I guy could always use more. I still smirk every time I jump on the interstate.

 

I can't help wondering if I put a stock tune back in, if I would notice more of a difference. It is easier for me to feel loss of power than a gain in power.

2001rotax800 Enthusiast

2001rotax800

Posted
  • Author
Posted

Well I just upgraded from the 6.0 so the stock 8.1 is insane. Like I said I wantedto drive it for a little while to get a base line. I should have time to put it in this weekend, I will be sure topost the results, Jesse

dietz4ibanez Senior Enthusiast

dietz4ibanez

Posted
Posted

I would like to think that a cold air intake, mass air flow sensor and the tune would show you the best results. The combination of the three should make a huge difference!

k3500CC8.1 Enthusiast

k3500CC8.1

Posted
Posted

Recieved my Wester's tune late last week and installed the new PCM Monday evening. The weather has been a little wet around here since then, so I haven't had a chance to get the truck out of the garage. I plan on taking it for a spin this evening, so I'll post some results tomorrow. And it is a 93 tune.... Guess I need to get some octane booster on the way home from work...

k3500CC8.1 Enthusiast

k3500CC8.1

Posted
Posted

Finally got to drive the truck yesterday evening to test out the new Wester's pcm. I had idled it Monday evening after the password re-learn and it threw no codes. The truck was near empty so I went down to the local gas station and mix about 20 gallons of 91 octane with Lucas Oil Octane Booster. Still no codes and I didn't do the crank re-learn.

 

I had a 2001 K2500HD SB with the 8.1 and 6 speed manual... That truck was flat out impressive... I always disliked the amount of power the Allison robbed from the 8.1L after having the 6 speed manual combo. When I bought my 2006 8.1L, I always wished it felt more like the 01 truck. Well, now that's not a problem with the new pcm. This new tune is just flat out impressive from a standing start. Instant response with the rear duals fighting to maintain traction. If you get this tune, you will just laugh everytime you hear one of the diesel guys talk about the throttle response of the LBZ, LMM, or what ever the latest flavor is.. You'll be at 35mph while the diesel is still thinking about spooling up it's turbo. Instant power from idle...

 

I had Wester's remove most of the torque management, and also allow the engine to rev to 5500rpms while in the manual mode for the Allison. Acceleration is best when running in the manual mode and shifting at 5500rpms. Transmission will still shift at 4800rpms while running in the D mode. I also had them remove the speed limiter and maintain stock programming in the tow/haul mode for pulling heavy. I haven't tested the stock programming in the tow/haul mode yet, I'll try to do that this weekend.

 

I very happy with the results of the 93 tune.

Bud Enthusiast

Bud

Posted
Posted
I have a tune waiting in my garage to be put it. I just got the truck last week and wanted to drive it a bit before I put the tune in, so I see what I wuold notice different. If anyone has some comments please post them. I already know that the 8.1 is a friggin moster :cool: I guess when I get a few minutes I will toss her in and see, Thanks

 

I have had the 93 tune in my 2001 Sierra 2500HD for over

a year and I still love it. Don't like the gas milage but I love the

power.

 

 

Bud

Daubs Enthusiast

Daubs

Posted
Posted

2004 CC/SB 8.1/Allison 4x4. Volant intake and Westers tune (corrected for tires, asked to give best MPG / Power mix). Was getting 8.5-9 MPG around town when I got the truck. After intake and tune my MPG slowly started to climb. Getting 10.5-11 around town and 12-14 highway. Plenty of power. Truck never seems to work hard at anything.

Paulie G Enthusiast

Paulie G

Posted
Posted
2004 CC/SB 8.1/Allison 4x4. Volant intake and Westers tune (corrected for tires, asked to give best MPG / Power mix). Was getting 8.5-9 MPG around town when I got the truck. After intake and tune my MPG slowly started to climb. Getting 10.5-11 around town and 12-14 highway. Plenty of power. Truck never seems to work hard at anything.

 

 

What size tire are you running?

 

What gear settup?

  • 3 weeks later...
oldenumber7 New Member

oldenumber7

Posted
Posted
2004 CC/SB 8.1/Allison 4x4. Volant intake and Westers tune (corrected for tires, asked to give best MPG / Power mix). Was getting 8.5-9 MPG around town when I got the truck. After intake and tune my MPG slowly started to climb. Getting 10.5-11 around town and 12-14 highway. Plenty of power. Truck never seems to work hard at anything.

 

Thrown it on the dyno yet? Curious as to the HP/torque increase.

westca707 Enthusiast

westca707

Posted
Posted

IMHO... If you have an allison transmission, I wouldn't recommend it. And why would you want to have to fill-up with premium fuel all the time with a gas guzzler like the 8.1 when you don't have to? You're better off in the long run to keep it stock. That engine/tranny combo is plenty of power already.

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