Surging Problem

johan · Post by **johan** » Wed Nov 03, 2010 5:10 pm

Well i might look some more at this.
I did try to find the tables Mike mentioned and the 05 and below cals are radically different in file structure so they are hard to find and require time, something which i do not have much of lately.

FAhemiST · Post by **FAhemiST** » Wed Nov 03, 2010 9:39 pm

i dont even see a problem in those videos lol

TooCoolHemi · Post by **TooCoolHemi** » Thu Nov 04, 2010 11:00 am

Yea Johan i'll bet they keep you busier than a one legged man in a butt kicking contest.lolol Maybe if the boss would read this thread he would be willing to give you some time and help to solve this for us truck's.Mike has a lot of experiance tuning these Hemi's.Being he has seen this before and solved it i feel your effort's to add this to the truck parameter's will not go unrewarded with the solution we need.I also believe it's going to help sell more DSP's and make the best tuner out for us truck's even better.Thank's for not giving up on us.

TooCoolHemi · Post by **TooCoolHemi** » Thu Nov 04, 2010 11:14 am

FAhemiST wrote:i dont even see a problem in those videos lol

lol Yea it look's a hell of alot better than it did a couple of week's ago.Fast play it again.Turn up the volume and watch the rpm's.I gave it some gas and i'm hold the the throttle steady.(no movment of the gas pedal) Each time it surge's the rpm's move.It's hard to hear over the exhaust but you can hear the motor surging.If you can't hear it listen when i let of the gas you can hear it surging.(it's doing this the whole time in the vid.) Also it took what 15/16 second's to go from 1300rpm to the commanded 1800rpm when it shift's.Fast i know you have a surge also.Did switching from the DSP to SCT solve it for you? (just curious)

FAhemiST · Post by **FAhemiST** » Thu Nov 04, 2010 11:57 am

i blasted that video on my speakers, still wasnt clear to me, i'd prolly need to be driving it to tell. haha
my truck surges and lunges when coming to a stop, tuner does not matter. i havent had a chance to get a log to hemifever to correct it.

TooCoolHemi · Post by **TooCoolHemi** » Thu Nov 04, 2010 12:09 pm

That suck's.lolol You don't need to drive mine it's the same as your's a couple week's ago.Johan has really made a big differance in the surge.It's still surging,but lightly now.Don't sell your DSP just yet.Johan may have a solution for us soon.

TooCoolHemi · Post by **TooCoolHemi** » Wed Nov 10, 2010 4:39 pm

Johan any update's Bro!

Post by **mikel** » Wed Nov 10, 2010 4:50 pm

TooCoolHemi wrote:Yea Johan i'll bet they keep you busier than a one legged man in a butt kicking contest.lolol Maybe if the boss would read this thread he would be willing to give you some time and help to solve this for us truck's.Mike has a lot of experiance tuning these Hemi's.Being he has seen this before and solved it i feel your effort's to add this to the truck parameter's will not go unrewarded with the solution we need.I also believe it's going to help sell more DSP's and make the best tuner out for us truck's even better.Thank's for not giving up on us.

Johan has a few updates to get off his plate.

Unfortunately, the bosses need his time to help us develop products to sell, they wont justify the time for an issue that likely affects less than 1% of our users

TooCoolHemi · Post by **TooCoolHemi** » Wed Nov 10, 2010 6:30 pm

TO THE BOSS!!!

Guy's this is not a Diablo update it's cmr.I payed for my Diablo and then paid again for cmr.How many guy's you know have a stock truck or even have a few bolt-on's with cmr custom tune? cmr is for us more serious user's of the Diablo.This mean's internal part's and forced induction which can no longer be tuned by Diablo without cmr.So in reality this is waaaay more than 1% user's.That is why i came to you with the problem.I telling you most everyone with a cam bigger than a 260ish grind has a surge of some degree.Most of the reason for cmr is to tune this cam and the mod's.This is the reason that we even get cmr tuning.We need to get rid of this surge.It's killing modding the truck's and your cmr bussiness for the truck's.I dare say if it was the car's and they did'nt have the adjustment to make the car run right it would be killing cmr there too.I paid my money just like anyone else and so did all the guy's that still have surge's.Are you saying that we don't get what the car guy's are already getting?What about my cmr dealer? I came to you at my cmr dealer's request.Neither one of us are happy that we can't get the truck tuned right.He is trying to make it easy by giving you the answer to the problem.This solution to the problem is a necessity for cmr tuning for the truck's.My cmr dealer is not happy and neither is his (and your) customer.WE NEED THIS UPDATE FOR CMR.So was my and all of us truck's who paid for cmr tuning and having faith in the Diablo just a case of miss placed trust????? What do i tell those who are waiting to see if there's help with this problem??? WE NEED YOUR HELP WHAT DO YOU SAY??? (I love my diablo and have been a loyal customer so i'll stop here) I would like a response from the boss please!!!

Oh just so you know tune 004 helped the surge but killed gas mileage.(So the band aid is not a good one)

Post by **mikel** » Wed Nov 10, 2010 6:50 pm

Again, the number of Predator customers running a cam over 260* is likely in the 1% range, no matter how you slice it.

There is no surging issue to be associated with superchargers so do not start spreading misinformation.

Johan has stated he is not sure that adding these tables (assuming they even exist in these calibrations) is the solution, which makes it VERY difficult for him to justify the time required to start digging through these files and trying to map something out that you dont even know if it is there.

Maybe I have not been forward enough as to HOW INCREDIBLY DIFFICULT it is to map these PCMs out. Have you ever stopped to wonder why it is that we are the ONLY ones to offer custom tuning for these PCM? Could it be that it is so involved that most others could not make it happen??? If you had any clue as to how difficult it is to do what you are asking, you'd likely back off and hope Johan can find time to look into it at some point in the future.

Post by **mikel** » Wed Nov 10, 2010 6:54 pm

And, before you get upset here, realize that Johan did not just happen across this thread by accident.

I saw it, and asked him to look into it, and he decided he would be able to help. After providing a few tunes, it looks like he made good strides toward improving the issue, so its not like you have not been given any assistance.

Also, in reference to the mileage drop, that would be expected with disabling EGR, nor would I expect to be getting 'good' mileage from a 260 cammed HEMI....?

TooCoolHemi · Post by **TooCoolHemi** » Wed Nov 10, 2010 7:25 pm

Mike i hear what you are saying.I am in no way putting down Diablo or trying to start any problem's.I am a loyal and grateful customer.I Thank Johan and all of you for the help i received so far.This is a serious problem and need's addresseing.Guy's are just dealing with it, I could'nt.If you want to see what it's like go buy you a $33,000 truck put a cam BIGGER than a 260 in and have it cmr tuned.Then come talk to me.I know you guy's are really busy,but it need's to be investigated.I have been trying for over a year to get cmr to get me tuned properly.It still hasn't happened.I'm telling you it's way more than 1% of the truck's in cmr.All i'm asking is please investigate it for us.I know how these pcm's are just from a user's point of view is.(believe me).So i can imagine from a writing the program point of veiw must be.(no fun)If it's in there we need it.Please check into it for all us is all i'm asking.

Mike one guy who posted in this thread with bigger than a 260 cam was getting 24mpg.So yes as long as your not in the gas you can get good mpg when modded.I also got better than stock mpg at one time.(Wonder where that went.)

hemi_loredo03 · Post by **hemi_loredo03** » Mon Nov 15, 2010 11:33 pm

Crossing fingers this gets resolved. I have a cammed hemi ram and I have surging too....

sctb2865 · Post by **sctb2865** » Tue Nov 16, 2010 1:46 am

SCT CUSTOMED tuned here (hemifever does my custom tuning my guy cant figure it out either) with a comps 268 cam with the works done. stall gears injectors, p/p heads, exhaust headers etc... I have the surge as well. Would purchase a daiblo if the surge thing was figured out....will be watching this thread! Just wanted to say I guess i'm one of the 1%!

johan · Post by **johan** » Wed Nov 17, 2010 10:13 am

You guys have to understand our workload and priorities from a business point of view.
I get told what to work on, 2011 DCX stuff has priority over pretty much everything as far as new development goes here.
Also, the word "surge" is used a little too loosely here in reference to what your vehicle is doing.
I can honestly say that i have probably tuned 100plus plus vehicles with fairly large cams and been able to eliminate any kind of surging.
From what i can see the case discussed here is rather special and i am almost thinking there might be some mechanical issues that is contributing to this surge, a vehicle simply does not act like that from calibration changes(proper ones).
Just saying.....
Also an FYI, i do not get on the forums here as much as i would like to but i try, thats all i can do at this point.