Tuning for 07+ trucks w/6.2L

sk1er18 · Post by **sk1er18** » Wed Jan 28, 2009 9:14 am

I had the predator on my 2005 Silverado and loved it, i didnt even get the custom diablo tune and it still took almost a full 1-sec off my 1/4mile time with just the 87 octane tune.

I now have a 2008 GMC Sierra with the 6.2L engine and 6spd trans. I have two questions:

1) My truck comes from the factory with a 91+ octane requirement. Does the predator take this into account?

2) I am going to be putting 305/55/20 (basically 33") tires on soon. From my understanding the predator can not tune the transmission on these newer trucks but CAN correct the speedo for the larger tires. How will this affect the shift points since I believe the trans shifts from an iteration that takes both speed and RPM into play...

Thanks!

CANUCKPREDATOR · Post by **CANUCKPREDATOR** » Wed Jan 28, 2009 9:44 am

1. You would install the Diablo tune which is made for 91 or higher octane

2. It won't change your shift points, as you said the TCM isn't changed on the new vehicles. What will happen if you go to the bigger wheels and tires is a MPG drop and a loss of acceleration due to the heavier setup.

Post by **mikel** » Wed Jan 28, 2009 11:00 am

You will also have the option of running an 87 octane tune on this truck...

sk1er18 · Post by **sk1er18** » Thu Jan 29, 2009 12:28 am

technically i can already run 87 octane, the manual just says that i would loose some performance and may experience pinging..

what's the difference/advantage to running the 91 octane diablo tune over the stock 91 octane tune?

and for question #2- i was talking more along the lines of when the truck will shift. since the diablo doesn't change the shift points will my truck hold 1st gear longer or for less time due to the offset in speed vs rpm.

if i was worried about gas mileage i wouldnt have got a 6.2L. and since i have the low 1st gear of the 6spd trans and 400+ hp, im not too worried about losing a little acceleration due to the 33s... bet i can still be in the low 15s

sk1er18 · Post by **sk1er18** » Fri Feb 20, 2009 9:45 am

Hey mike, is there a projected time frame where the predator may have TCM support.... or will the Trinity be able to do it?

I'm putting my lift on today and ordering my 33s next week and trying to decide on what to do about programming.

Ideally, id like the predator and have you guys build me a tune through data logging.... but if TCM support isnt coming in the near future, it makes my decision harder since there are a few shops who can do custom dyno tuning for around the $500 mark and modify the TCM... but i've always like having the programmer

Post by **mikel** » Fri Feb 20, 2009 10:07 am

It is coming...we are at work on this as we speak....

gump2388 · Post by **gump2388** » Fri Feb 20, 2009 11:03 am

ahhh any kind of eta. maybe a week or two?

Ill_Born_SS · Post by **Ill_Born_SS** » Fri Feb 20, 2009 1:43 pm

mikel wrote:It is coming...we are at work on this as we speak....

And here is the proof:

http://i471.photobucket.com/albums/rr79 ... upport.jpg

Post by **06MonteSS** » Fri Feb 20, 2009 2:54 pm

sk1er18 wrote:technically i can already run 87 octane, the manual just says that i would loose some performance and may experience pinging..

well, technically ya can't...

if you're using the diablo tune / performance tune, those tunes by diablo are made specifically for 91 octane gas or higher only... cuz they have increased/more advanced timing - so you HAVE to use 91 octane gas or higher...

but the predators for the trucks also have a separate 87 octane tune done by diablo that you would have to use if you were using only 87 octane gas... that's what he was talking about... that there is an 87 octane tune available on the predator for your truck...

sk1er18 · Post by **sk1er18** » Fri Feb 20, 2009 10:17 pm

mikel wrote:It is coming...we are at work on this as we speak....

Thanks Mike. But are we talking about weeks, or months?

06MonteSS wrote:
sk1er18 wrote:technically i can already run 87 octane, the manual just says that i would loose some performance and may experience pinging..
well, technically ya can't...

No, technically i can... because technically i can drive down to the station right now and put 87 octane in according to my owners manual. So yes, technically i can run 87 octane in my truck right now.

But i guess Mike was suggesting that i would be able to run 87 octane without a performance decrease? I dont know, doesnt matter... 91+ for this truck

Post by **06MonteSS** » Sun Feb 22, 2009 11:18 am

hahahah

what I was saying was, if you are using the diablo/performance tune, you need to run 91 octane gas... if you use the 87 octane tune that is on the predator, then you can use 87 octane gas...

if you try to run 87 octane gas when you're using the diablo/performance tune, you'll get a ton of knock/ping and knock retard due to the more advanced timing in that tune... that's why I said "technically ya can't"... if you use 87 gas with the 91+ tune, you could cause engine damage due to all the knock...

sk1er18 · Post by **sk1er18** » Sun Feb 22, 2009 6:37 pm

^^^ Yea man i hear what you're saying. I meant that i can run 87 octane on my stock tuned truck if i wanted to. I know you cant run 87 on a truck that diablo tuned for 91+.

Oh and Mike, when/if you get around to this thread again... i was thinking today: Since you guys say you are working on the TCM support, can you at least tell us how it will become available? For instance can i buy the predator now to recalibrate my speedo and bump up the performance... and then download an update in the future for TCM support- or is it going to be a new P/N that we're going to have to buy??

09sierra6.2 · Post by **09sierra6.2** » Sun Feb 22, 2009 8:37 pm

im new on here and it might be off of this topic but the U7194 is the predator that i want to get for my gmc i have an 09 with 6.2 and i was just wondering how many ppl have had problems with this programmer? ive heard nothing but good things so far but i dont wana get it and it tear something up then i regret buying it because gm wont cover it if they seen its been flashed even tho i restore it to stock tune...

08Silverado · Post by **08Silverado** » Mon Feb 23, 2009 12:19 am

From what I hear the predator is undectible after you restore the factory tune.

sk1er18 · Post by **sk1er18** » Wed Feb 25, 2009 9:07 am

So I have yet to talk to anyone with a Diablo tuned 6.2L (L92 truck) engine... I was very happy with the predator on my 05 5.3L but am still torn. Does anyone have some data for how the L92 engines take to the Diablo tune? Also for a relatively stock truck (intake & cat-back exhaust), is dialing the LTFT's enough and thus a custom tne really wouldn't help much more than that?

And Mike, do you think that when/if TCM support is available is it likely to be an update that we can download the the U7194?

Tuning for 07+ trucks w/6.2L

Tuning for 07+ trucks w/6.2L

RE: Tuning for 07+ trucks w/6.2L

RE: Tuning for 07+ trucks w/6.2L