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DRAGRCR RedEye

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DRAGRCR

DRAGRCR

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Thread Starter #281
MPVI2 and a cable to data log are pretty cheap assuming you have a Windows based OS laptop and I think you'd find very useful for how you're using the car. I learn a TON from my drag strip logs and log every single run.
I had to google that to find it. But you have me interested. The Friend that set up my dealer visit is also good Friends with the owner of HP tuners. So..........

OK, I think I misunderstood what was happening. Especially since it seems low fuel quality is what may be causing this. My "Butt Logger" is NOW telling me this based on all your feedback. Correct me if I am wrong.

The car is actually shifting in something like 90 milliseconds (.09 seconds), but it feels like for about .3 to .5 seconds there is NOTHING. I was thinking all along that it was taking this .3 to .5 seconds for the shift to occur. Now I am thinking the shift happens in .09 seconds like planned and then the Timing and possibly the throttle are cut way back for that .3 to .5 seconds after the shift is completed due to it knocking violently. But I definately feel that the power is still reduced for as long as another .5 to 1 second after returning. So there is an initial huge reduction in power and then there is an ongoing smaller reduction in power.

If all the above is true, then why is there seemingly no issues on the 1-2 shift/converter lockup and the 3-4 shift? Maybe the characteristic of that 2-3 shift puts the knock over some critical threshold causing that hiccup.
 

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For reference as someone who also notices this hiccup, the best pump gas I can get is Shell or Chevron 91.

Maybe time to start investing in some of that booster juice...
 

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My best time in my 100% stock power Redeye (just rear MT ET Rs) is with a 1.47 60ft, 6.68 1/8th, 10.46@130.58 (1900 DA, high 40s, with a track at 2350ft). I haven't noticed a hiccup and I've been running 92 octane, which is mostly what we have. Just found a Chevron 5 miles away that says it's 93 pump, and another one 25 miles away. I have never logged any of my runs. Didn't know you could do that on a stock car. I'll have to look into getting a MPVI2 and cable, does Diablo have anything they data log with, or is the HP tuners way cheaper? I've never logged before, but I can't imagine it's all that difficult. I'm curious to see what my car will show on 93 and if an octane booster might be helpful.

Good luck Ron, I hope the octane turns out to be an easy quick fix for your hiccup.
 
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Thread Starter #284
My best time in my 100% stock power Redeye (just rear MT ET Rs) is with a 1.47 60ft, 6.68 1/8th, 10.46@130.58 (1900 DA, high 40s, with a track at 2350ft). I haven't noticed a hiccup and I've been running 92 octane, which is mostly what we have. Just found a Chevron 5 miles away that says it's 93 pump, and another one 25 miles away. I have never logged any of my runs. Didn't know you could do that on a stock car. I'll have to look into getting a MPVI2 and cable, does Diablo have anything they data log with, or is the HP tuners way cheaper? I've never logged before, but I can't imagine it's all that difficult. I'm curious to see what my car will show on 93 and if an octane booster might be helpful.

Good luck Ron, I hope the octane turns out to be an easy quick fix for your hiccup.
Thanks. I really hope good gas fixes this. That would be so cool.

Yes you can log a locked PCM. If I read that correctly on the HP Tuners web site you can even copy the stock tune file. You need to send them the file in order to get an unlocked PCM from them outright. Yes you can data log with diablosport tuner and I am pretty sure I have heard of people logging locked PCM's with them too.
 

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I will try switching brands of fuel, also try keeping a splash of racing fuel in tank constantly. Will also look at STKR before and after octane bump. Still wonder why it’s pulling timing out suddenly, then putting it back in after shift to 3rd, then why only on that gear shift and not others thoughts on this @Speedy. It would be nice if it was just fuel quality. Might explain why some are experiencing this and others not. I will say I don’t always have this problem, never been able to connect the dots as to why. I alway use the big brand name pump gas of 92, or 93 octane as it is readily available in my area. If it is fuel quality I would be man enough to say I was wrong about dodge coming up w/ reflash solution from previous post, Wouldn‘t it be great if we had support chiming in from FCA, even if it was a private poster not flying under the FCA name or directly implicating them, from a liability stand point, they must be biting their tongue watching these posts evolve and knowing the fix. Throw us a covert bone once in a while ay! Remember on the other site RS would throw us a bone or two without giving the house away by dropping a small Hansel and Gretel trail down for us blood hounds to sniff out and decode. Ah yes dem were the days, can’t even hear crickets at Auburn hills lately. Although I do believe it’s a matter of time before that changes.
 

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Remember @Speedy saying though that light KR is almost impossible to feel, so it could be happening on other shifts, just not nearly as pronounced.
 

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Yes I remember, but trying to figure why so pronounced On 2-3 shift and not all the time. Best answer I think is for a car to be data logging when it happens, ‘“catching it red handed pun intended“ then that logged data can be analyzed and deciphered amongst us for solving the mystery. I think that is the best bottom line proof and answer in one.

I haven’t noticed it lately. But also with warming seasonal temps I add boost just to know I am not loosing any timing take backs from knock retard. Maybe I am answering my/our question, but still won’t know for sure till that proof data captures it.
 

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Maybe because we blow through the 1-2 shift quickly and with partial throttle minimizing the wheel spin, then we are dead into WOT in second, and the 2-3 becomes so violent because it is max'ing that torque, the RPMs are really moving faster than the subsequent gear changes, the computer has a fit!
 

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There's lots going on with the electronics in these cars. If someone can get me a data log with the proper PIDs captured I can probably tell you exactly what it is. We need to log STKR, and a bunch of other stuff as well like torque demand, etc.

Yes you can log a locked PCM with both HPT and Diablo as far as I know. I used both when my car was bone stock so unless something changed after 2016 I'm not aware of it'll work.
 

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There's lots going on with the electronics in these cars. If someone can get me a data log with the proper PIDs captured I can probably tell you exactly what it is. We need to log STKR, and a bunch of other stuff as well like torque demand, etc.

Yes you can log a locked PCM with both HPT and Diablo as far as I know. I used both when my car was bone stock so unless something changed after 2016 I'm not aware of it'll work.
Have you made a youtube yet of data logging for dummies? I might need that.......:ROFLMAO:
 

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Lol I do have a full play list just for data logging and tuning.
 

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Lol I do have a full play list just for data logging and tuning.
Link or? About to pull the trigger in a bit on a MPVI2 and cable. Just emailed Curt. All this data logging has me curious on my own car. Plus my local tracks are finally going to be opening!
 

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I had the 2-3 "bog" the first two times I launched my 3.09 Redeye and that was it. Completely gone after that.
I lied.....it came back today. Back 2 back.

You fookers jinxed me lol
 
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Thread Starter #294
Link or? About to pull the trigger in a bit on a MPVI2 and cable. Just emailed Curt. All this data logging has me curious on my own car. Plus my local tracks are finally going to be opening!
Here:

 
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Woooo! I got 10-pages behind! Car looks great, Ron!
 
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Thread Starter #296
A little history. I saw the first late model Challenger concept/mules at Mopars at the Strip in something like 2003 or 2005. I saved my money and in 2009 I bought a loaded SRT Challenger Tor red 6 speed manual with cash. I took it to the drag strip and it ran 14.50 @ 99 mph in the quarter mile. I sold it 3 weeks later. I owned it a total of 4 months. Back then they did not have tuning and that car was so slow I just dumped it.

After last week I was seriously thinking about selling this car. My Dealer actually said it might qualify for a FCA Buyback. Might take a little effort but possible.

So, Today I was able to race it again. Made 9 passes. Well, it STILL has this massive HICCUP which totally sucks and is NOT going away or getting any better. It's NOT fuel. Better fuel did help but it had a negative effect on the Hiccup. The more power the car makes the worse it gets, since it thinks it is going to over rev or it is actually over revving. So, here is the deal, I now believe it's the weight reduction that is doing it and maybe my tune is a little wacky? The Black RedEye that ran with me last week had about 300 pounds more than me and did not do it.

Dispite all this, the car was showing me something. She wants to run. So, I am going to take it back to the dealer and see what my options are. I want to keep it and race it but that hiccup has got to go.

Today the DA was a little better. I was able to get a little better cooldown before my first run. I had 7/16 tank of mostly SS100.
First pass WITH HICCUP and leaving from 800 RPM 1.408 sixty foot 6.717 @ 107.90
Second pass was a hot lap so the power chiller was optimum, she ran 108.74 but spun a little in first to a 6.777
Best pass was actually the last at 1:30 pm 3rd pass of 3 fast hot laps. 1.443, 6.693, 108.00
ALL 9 passes had a hiccup.

REVELATION : And it's kind of embarrasing. But it's the 1-2 shift that has the hiccup. The video don't lie..........

It seems like first gear is long but I am pretty sure the converter is locking in first which makes it seem that way and so it seems like 2nd is too short in the video but does not feel that way in the car.

One last thing. My Friends Demon was doing this exact same thing in really good DA in January in Houston at the Legion of Demons event. They lowered the 1-2 shift command in the tune 200 RPM. Car went from 10.04 to a 9.71.

 

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The one two shift sounds like a manual
 

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Do you know what your car weighs sitting on the starting line Ron? I could see the rev limiter running over the shift point if the car was light enough to accelerate quicker than the system can think.

Also, when I'm in drive around trim w the Nittos on my car does what you're describing every time I get really heavy footed w it. It spins, runs the motor up too quickly, bangs the rev limiter, shuts everything off while it's shifting to 2nd and when it comes alive again it's in 2nd and stuck to the ground. After seeing your video I'm pretty sure you have the same 'issue' but without the tire spin.

Btw, nice 60'. (y)
 

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I hope we all get to the bottom of this. Real downer for those Wishing to keep stock tune, and playing by the rules Dodge set advertising SRT racing. I hope their Dyno labs with the software engineers are on this one. We know the answer to the problem while getting substantial more power and et’s but Ron, myself and others right now are not interested in picking up the phone at this point to the half dozen or so top tuners that could solve it while damn near making it fly. If suggesting box is open I would think when car goes back for evaluation and to check his options, a flash download file on his test mule would be great, he has substantial experience racing this platform probably only second to FCA. Could be a great opportunity to work with customers. I think of this as a olive branch, not a disgruntled small group of SRT malcontents. Thank you for delivering a way cool car. I can only imagine the raw amount of time money and determination it took to make 4,500 lbs do what it does. I know this perceived small hiccup yet VERY important to us can be solved and make a lot of smiles. Thank you FCA.
 

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Ron that sure looks like rev limiter. Get someone to get a data log bud, better yet get a MPVI2. I can help show you how to use it. Way easier than you probably think. I'm jealous of that 1.40 60`. I'll show young to datalog and younshoe me how to do that lol.

Here's my tuning play list

https://www.youtube.com/playlist?list=PLWeMviIDMPN2xNgAbamMuNjlydIhwkv94
 

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