EPA fining Ebay

[Wes Harden]

I see the EPA and the DOJ are going after Ebay for allowing pollution control defeating devices to be sold from their platform. I beat Amazon is next. So I ordered the HPtuner MVPI3 today and 2 credits. For warned gentlemen, I will probably be asking more questions than tj1978 . I have used this type of device before to flash oem updates when need on fleet stuff. Mostly fords though. I will be making some minor tune adjustments to my 01 8.1.

 

[centexk5]

There is a lot of information on the LS platform although I’m not aware of much with the 8.1. Bet you could find someone to write a tune pretty easily for it.

 

[Chevy305]

There is a lot of information on the LS platform although I’m not aware of much with the 8.1. Bet you could find someone to write a tune pretty easily for it.

As far as HP Tuners is concerned, tuning an 8.1 is no different than any LS.

 

[centexk5]

Oh I’m certain. Just talking about specifics around the engine itself. Plenty of 5.3 and 6.0. Just haven’t seen much specifically tailored to the 8.1 but I’m sure it’s out there.

 

[Blue85]

It's literally the same PCM, most of the same sensors and uses the same torque management "features". So the process is the same of tuning MAP and MAF values, finding how much timing it wants, etc. It's not like you would just download someone else's tune, flash it in and post "runs sick, bro!" on Facebook.

 

[Wes Harden]

Oh the "runs sick bro" is good choice? As opposed to "runs faster than a rapped ape"
I think my approach would be to copy/save my current perameters. Turn off things that I don't think I need egr and air pump, thou I still have cats and will need to see if the air pump effects those.
Evap testing. There another system Zoo mentioned I should shut down but my memory retention sucks.
I think the members here might be the best source for tuning an 8.1. Have doubts about the fb 8.1performance page

 

[Big Ray]

Focking gov is out of control...that is all.
Guess that's why they need all the ammo they've been hoarding.
Guess they'll be pulling Wacos in driveways across Amerika before long.
O.k., that is all...

 

[imiceman44]

Oh the "runs sick bro" is good choice? As opposed to "runs faster than a rapped ape"
I think my approach would be to copy/save my current perameters. Turn off things that I don't think I need egr and air pump, thou I still have cats and will need to see if the air pump effects those.
Evap testing. There another system Zoo mentioned I should shut down but my memory retention sucks.
I think the members here might be the best source for tuning an 8.1. Have doubts about the fb 8.1performance page

Torque management

 

[Blue85]

Have doubts about the fb 8.1performance page

I'm sure there is a lot of knowledge there, but how do you find it?

The stock tune basically disables performance enrichment.

• "enrichment rate" or "ramp in" stock setting is something like .001, which means it takes minimum of a couple of seconds to ramp from stoich to enriched. Most turn this up a lot, such as 0.1 or 1.0.
• "PE delay RPM" is 5,000 or 5,500 RPM stock, so you'll want to bring it down to anywhere you'll see high load, can even be 0RPM.
• Turn the "PE Delay Delay" down to 0s. That's way better than waiting a whole minute!
• You'll have a threshold for TPS or torque, which will be 100%, so you'll want to bring that down - maybe 90%.

Once you actually have PE, then it's worth looking at the EQ ratio table. This is the ratio of fuel under PE conditions compared to non-PE. Some LS will be very rich, like 1.17, which is close to 12.5:1 AFR. For 8.1 you don't need as much. 1.13 is about 13:1 AFR.
(Random screen shot I stole