This is just an update in case you had no heard. I called Diablo today to complain about the high EGTs while using the 40 HP tune towing 8000lbs and I was told that in two weeks the updated programming will be released.

Cole told me that there will be modifications to all of the tunes not just the 40HP. You will have to send your unit in to be updated but at least they are trying.

Just FYI.

Thanks for the information. Hopefully they won't take too much out of the tune if any to decrease the EGT's.

Been waiting to hear about that, Thanks falkirk.

I wonder why they can't upgrade through the serial interface? Too bad, that would save them a lot of hassle.

I wonder why they can't upgrade through the serial interface? Too bad, that would save them a lot of hassle.

+1... i will hold out abit longer before i buy a predator then

I had sent my tuner back to diablosport for the "updated" beta version of their new tunes, because I, too, felt that the EGT's on the 40hp tune were too high. I just returned from Colorado pulling our 15,000 lb toyhauler and did notice a 100-150 degree drop in overall EGT's. It does seem to make more boost, but on long steep grades, I still had to back out of the throttle or downshift to lower the EGT's. All in all it seems to be a better tune and the shifting seems better too...don't know why, but it does. I'm not sure much can be done to lower them any more...except for returning to stock tune. PM me if you have any ?'s.

Falkirk,

Do you know if there's a re-programming fee involved?

asnap,

I should have asked but I forgot, but from the way he was talking it did not sound like there was a fee. He said that in two weeks just call back and get the address and send it in. And he also said that they knew that there was a problem and that is why they were developing the new program. I would hope that if there was he would tell me. I guess I will find out in two weeks when I call back.

You will probably have to pay shipping both ways.

I wish they would handle it the way edge does. They send you a new one with your credit card # as security and you return your old one for full credit after you get the new one.

This may take a while as there are multiple fine tuning tweaks being done, and Diablo is not too quick to release revisions.

The GM tuners are the only ones that cannot be updated without sending in. All I will say is that there is a good reason that they are doing it this way.

There is a lot more being done than EGT reduction ;)

Hopefully something for the 1093s, or better yet more power.:D

I wonder if it will still stack decently??? I sure hope so. Any stackers planning on jumping on the updated tune that can keep us posted??

The person that I talked to at Diablo said that there was more than just EGT changes to the 40 tune. He stated that all of the tunes were getting changes and he also said that there were changes being made to the boost settings.

I anxiously await. Dropping about 400°F off all their tunes would be a good place to start!

Suffice to say, no matter how hard I leaned on the 80HP tune with my tractor and trailer behind, 139x°f was top EGT and that's with an open tip thermocouple...

The revisions have nothing to do with stacking or 1093 codes as the Predator just doesn't seem to set them unless I am missing something.

Oooh, this is good news Kennedy.

What are your cruising EGTs now? When I'm at 17,000 gross on the 65 HP setting, I'm running over 900° consistently on flat ground.

Nothing wrong with 900°f cruising towing...

Suffice to say, no matter how hard I leaned on the 80HP tune with my tractor and trailer behind, 139x°f was top EGT and that's with an open tip thermocouple...

The revisions have nothing to do with stacking or 1093 codes as the Predator just doesn't seem to set them unless I am missing something.

John, that's very interesting, because I still had to back out of the revised 40hp setting to avoid hitting 1300 on long climbs. My trailer weighs about 15,000 lbs though, and the average altitude of our last trip was about 7500 ft. Just running along at 65-70 mph on fairly flat land, I was around +-1000 EGT.

Next time, see how high it goes for a few seconds. It will bottom out. 1350 sustained is what my truck will run with a stock tune at high alt towing.

I won't suggest towing with the 80 HP tune, but there will be a difference from tune to tune...

Most of you guys are probably WAY ahead of me, but when I e-mailed Predator today, they said that the updates would be available to the general public in about two (2) weeks.

I'm interested to see what happens.

Too bad they aren't able to update them at Indy.

would have been nice.

The more the issue gets pushed, the worse it will get. They will either get distracted answering questions, OR just release what they have now.

This beta stuff is supposed to be tight lipped, but apparently that point has not been emphasized to those privy. I've had one since early June and have been working personally with Diablo R&D. If pressure mounts, I'm sure they'll just release what they have. What is ready is VERY good, BUT if it can be made better...

The more the issue gets pushed, the worse it will get. They will either get distracted answering questions, OR just release what they have now.

This beta stuff is supposed to be tight lipped, but apparently that point has not been emphasized to those privy. I've had one since early June and have been working personally with Diablo R&D. If pressure mounts, I'm sure they'll just release what they have. What is ready is VERY good, BUT if it can be made better...

They never told me to keep quiet. Infact, I let them know that I was a member here, and there were several other concerned predator owners with the same high egt problem that I was having that wanted intel on the new tune. Had Johan or Cole told me to keep it quiet, I would have, but they never said to keep it quiet, and I don't assume anything. I agree with you John, that what they have now can be tweeked a little more for even better results. I think they are on the right track.

So they can send you a custom tune through the net but not the full update? They sent a custom tune to me about a month ago. took it to the track today with the 65hp tune I turned out a 16.6 at 74 rolling the last 300' with a 1093-:t .

Something to remember. While the Predator gets a lot of "heat" for high EGT's, those other tuners/modules that do not directly increase boost on the LLY do the same thing...

I've had several Predator custom tunes for a few months now, to begin with they had issues with setting codes, the newest program is pretty good, but still gets hot, not enough boost in my opinion. Still waiting on the final version.

Hello all. Nice site. I have a 05 CC/SB 4x4, I had an 02 in the same set up. I just bought a predator Saturday. The jackass sales guy where I bought it said in the economy mode I didn't need to upgrade the exhaust. That appears to be wrong, and now after reading this I'll have to send the unit in to have it updated. Man I am ready to take it back, and start over when they get there Censored together. I miss my 02:bawl:

One needs to remember, the stock LLY can hit 1400°f on it's own...

Kennedy's right, when pushed, mine will hit 1300° stock. I've never seen quite 1400°, but I don't doubt it.

It kinda scares me!

I've had both the LB7 and LLY up to 1420 stock towing in the summer heat pulling Baker Grade in the CA desert. This is where we do our testing for Tow level programs so we needed to know the stock numbers first. While everyone doesn't Tow in 115 deg weather up ~8% grades it's still a good valid test case. Winter time up the same grade with the same load temps drop back into the 1350 range.

I'm kind of embarassed that I don't know more about the egt's. I have only been driving a Duramax for three years:duh:. When are the high temps in exhaust most common? Are they more common when pulling a trailer uphill 2700-3000 rpm, or just anytime pulling a trailer? Or how about regular driving? What our your egt's under normal driving condition? Sorry for all the questions.

Falkirk,

Any updates? About now is when they said they though the new release would be available.

You are right it has been about 2 weeks. I just tried to call but they are closed. I will call tomorrow and see what's up.

Chuck,
Do a quick search on EGT's. There's a wealth of info about "Exhaust Gas Temperatures" and other related topics.

I received an email late last week from Diablo Tech support regarding the fix for the Predator - it's in beta now and should be available by the end of the month

:grd:

Progress is good, but slow.

One thing that I would like to point out. It seems that Diablo gets singled out for high EGT's, BUT any tuner/module that does not increase boost on the LLY will have high EGT's. Of the few out there that do increase boost, none have really done it well...

Kennedy,

Could you explain more about programming increasing boost? I know you've mentioned this before, and I'm curious about this aspect of tuning. Since the Predator doesn't directly increase boost, is the extra power provided only by fueling the engine more?

Just pulled the Predator off my truck. Running the 65hp tune I was seeing 1000 to 1100 degree cruising on the freeway. Stock I was seeing 800. Stomp on it and I could get it to climb fast to 1400 and it was still going. I could never get it above 1200 stock. I don't want to smoke the turbo, those EGT's are too high for me to feel comfortable. I spoke with Cole at Diablo today, nice guy, and he said the new program should be out NEXT MONTH but didn't know for sure. Not sure if I want to wait. I ordered the Edge today out of frustration but then realized it doesn't reprogram tire size and speed limit so I put it on hold. I'm really stumped right now. I like the features of the Predator just don't know if I'm willing to wait an UNKNOWN amount of time for Diablo to fix ther programming and I definately don't want to hurt the motor. Sorry I don't have any useful info here just blowing off some steam.

Chris

I just bought my Diablo about a month ago. Should I contact them to get on this list of updates? I don't have a EGT guage. Should I be worried? I don't tow anything, but I do have it programmed to the 85hp setting.

Thanks!

I just bought my Diablo about a month ago. Should I contact them to get on this list of updates? I don't have a EGT guage. Should I be worried? I don't tow anything, but I do have it programmed to the 85hp setting.

Thanks!

You should at the very least (if you don't already) have an aftermarket exhaust on your truck if you are going to run the 85HP tune, you can see some pretty high EGT's with the 85 tune even with an aftermarket 4" exhaust.
Gauges are a good idea, especially if you plan to tow.

my .02

i run on the 85 with a 5" straight pipe and my egt's get scary high, not towing! im sending mine back pronto

my girlfriends old man drives a big rig, bottom dump, he said any temps above 1150 and your playing with fire. i can tap 1100, 1150 easy with three dirtbikes in the back going up 5-6% grades at 75mph. cruising up even the slightest incline at 80mph or faster and Im hanging around 1000. A dodge guy I know said he thought I wasnt making enough boost and thats why temps are so high. he even thought that I might have a waste gate that is out of adjustment. while cruising my boost levels are usually about 4lbs. When I stomp on it I still only get to about 22-24lbs of boost. I sort of think that I should be getting closer to 30-33lbs of boost, what do yall think. I also keep in on the 85hp setting, normally, right now its on 65. Ive limped it 4 times, twice on 100hp and twice on 85hp.

jmg343 The LLY motors don't have a waste gate with the variable vain turbo so that should not be a problem. I see 30-34lbs on my attitude from time to time. I think we all should do what John said give Diablo a chance to fix the software and we will all be happy with the outcome.

how do we get on the list to get this update?

I'm sure when the updates are available someone here will let us know. I just hope Diablo is as good Edge with updates.

will running a 5" exhaust lower you egt's considerably?

how about adding the banks intercooler? would that lower them and would it be worth while?

I have a buddy who just installed the predator. This tuner seems to take a very long time to down load and smokes very bad with terrible shifts on the lly dmax. Has anyone else confirmed this? His truck runs / shifts fine without diablo.

It takes awhile for the trans to "learn" a new tuner.
The 100HP smokes pretty good.
I've run the Predator 100 on a few trucks, and they seem to do pretty well once the trans learns.

DO NOT use the 100HP tune on a stock transmission for too long. It will wear out the clutches after a while.

It takes a while to do the initial download since it backs up all the stock programming. Now it will be a bit faster to change programs. The Allison doesn't shift well after adding or removing power. He needs to drive it around for a while and the sifts should smooth out as the TCM learns.

Everything sounds normal. The initial download is a bit slow, but from now on changing tunes will go faster (just like the truck):h ). The tranny will smooth out after driving a while and going through the gears a few times with the added power. And yes, the Predator will generate some smoke.

Enjoy!!:muahaha:

I guess I don't totally agree with "anything above 1150 is playing with fire."

These Isuzu's with the VVT are a new breed that just run hotter--a stock LLY will go past that unloaded.

Exhaust is obviously nice, but a gauge is much more important. I tow daily on the 100HP setting with stock exhaust and find that it works nicely as long as I keep an eye on my pyro.

I'm guessin' no knows what that Predator update is?

I'm with crs2fer....

Any updates on this Predator thing?

we are running a pred with a juice and attitude
scrap stock exhaust the cat looks very restictive (eyeball it when u git it off ) egts were though the roof now around 1400 pred at 40% edge at level 5
trans shot so ill let u know how it goes
im curious on updates as well

I emailed diablo and they told me that it would be the end of summer before the updated version is released.

The date keeps stretching out....not surprised though. As a programmer myself I know that any coding always takes way longer then you estimate. Mostly this is because of the time it takes to do the testing, not the actually coding. Hopefully it will be worth the wait. I'd much rather wait for something that is complete and bug free than getting something early and end up being an unwitting debugger....

I emailed their tech dept and not getting any response back so far. I will wait another day then follow up with a phone call. I bought my Predator on eBay from Big Dawg Performance in GA. I sent them an email and of course no response.

Called Diablo...they put me on a contact list to notify me when the update is available.

Any updates from Diablo??? Are we getting close?

Sure wish they'd get done with this. I'm ready to get one. I think we will have to wait until at least the end of September before we hear anything.

I just bit the bullet and bought one a couple of days ago. I'm glad I did!!!!!! I will just send it in when the update comes or buy the cable to download it my self.

I just bit the bullet and bought one a couple of days ago. I'm glad I did!!!!!! I will just send it in when the update comes or buy the cable to download it my self.

Diablo will not allow PREDATOR download updates for GM products.
I knew this, and Kennedy Confirmed it, "knowing the reasons why". I just wish I did.

No sense in downloading the 'interface' software that I can think of.

The Internet/computer age has made me (and many others) IMPATIENT!!!!
WANT IT NOW!!!

The one thing I can't get past is the exhorbitant amount of smoke ANY of the tunes creates. And my MPGs suck with or without any tune. I got a lemon when it comes to MPG's. (actually my 2003 pulled better too) I have NEVER done better than 8mpgs towing 10,000 lbs., over ANY terrain . And never better than 14.5mpg unhitched, even with pure highway driving using primrose, and tryed it for several tanks without primrose. Tried others as well and to no benefit. This All, has made me a very unhappy Duramax owner. And I kinda wish I still had my 2003, although the kids like the entertainment system in my 05!

The original point was that the Predator does not help with better MPG's in my opinion, hence the unburnt fuel (black smoke) plumming from the exhaust upon ANY acceleration.