Have you experienced the shift hiccup issue with your Redeye?

[Hpindy]

The Redeye 1/4 mile list proves hiccup or no hiccup these cars are fast. Decent weather, decent track with decent DA Redeyes are mid to low 10s all day with little experience. Once you learn the car 10.5s and higher are your bad passes. These cars in prime conditions should be 10.1-10.2s all day. The SS should be at least a tenth faster maybe more.

So does S/S stand for " Superior Shifts"?

Sent from my BBF100-2 using Tapatalk

 

[Phast Hemi]

The Redeye 1/4 mile list proves hiccup or no hiccup these cars are fast. Decent weather, decent track with decent DA Redeyes are mid to low 10s all day with little experience. Once you learn the car 10.5s and higher are your bad passes. These cars in prime conditions should be 10.1-10.2s all day. The SS should be at least a tenth faster maybe more.

Agreed on what you said ....except that ss will be a tenth faster. It takes about 20- 25 hp to gain a tenth at these weights and power levels.

 

[EricG]

Bumping this thread for @JDOTZ

 

[EricG]

More shift hiccup info can be read in this very long thread here @JDOTZ

https://www.hellcatforum.org/threads/dragrcr-red-eyes.5739/page-32

 

[Rollieman]

Is there any chance the "Hiccup" is NOT due to hitting the limiter, but, instead caused from a slight tire spin at the shift point which engaged the traction control for a split second ?

 

[DGatzby]

Is there any chance the "Hiccup" is NOT due to hitting the limiter, but, instead caused from a slight tire spin at the shift point which engaged the traction control for a split second ?

Yes.

Here is something interesting. Got the new engine in the middle of the summer heat. Two items then, high DA (it was in the 90’s and sucked), and the tires/road were more sticky. I thought for a while, they did something good to mine and potentially got a “good” tune without the pause. It really felt good for quite a while. Maybe I did not go WOT “breaking in” the new equipment? It definitely shifts hard if you are not at 100% throttle.

Matter of fact, last day at RA I frequently watched the tach. When it got near 6000, I momentarily let up just a hair, it banged the next gear and I quickly smashed it. It worked good, but it is a PIA. Plenty of other stuff on the course to worry about. @DodgeCares how long long are you going to ignore us, how many times must I call you out? These things can be embarrassing! I paid good cash for mine, and could buy a butt load of other things. Understand? Tell us you guys want to work with us or tell us WTF is going on.

Nope, I have nothing special. Now that the DA is great, the road is slipping just a bit, and it is running like it should. It has fuel quality ALWAYS exceeding the recommended 91 octane. It is falling all over itself in a lot of the gears. If it going to run this rough, no shit, you can keep it. I will return it for repair until it works. Don’t think so? Check my records.

 

[DRAGRCR]

Is there any chance the "Hiccup" is NOT due to hitting the limiter, but, instead caused from a slight tire spin at the shift point which engaged the traction control for a split second ?

I am no expert, but David said a little more operating pressure might fix it. This is what I think is happening in my Super Stock when I had it. Data Logs did not show an over rev. Whenever I had a greater LOAD on the trans it would hiccup. If I understand this correctly the car commands a shift and then it starts looking at shaft speeds and it expects them to come together at a certain rate and in a certain amount of time. If that does not happen, the TCM sends a signal to the engine to reduce torque. That is the hiccup. My Frostbite RedEye was severely hitting the rev limiter But I was still told that more operating pressure might have fixed it. Higher operating pressure would make the trans shift harder and faster possibly eliminating the hiccup. By satisfying the shift logic and eliminating the torque management from kicking in or possibly by pulling the RPM down away from the rev limiter.

Or you can tell it to shift sooner or raise the rev limiter etc......

My Super Stock would definately hiccup when the Transmission LOAD was higher and it worked perfect with reduced load.

 

[hell on wheels]

If your head and body is moving around

During the shift

Your spinning

 

[DRAGRCR]

I am no expert, but David said a little more operating pressure might fix it. This is what I think is happening in my Super Stock when I had it. Data Logs did not show an over rev. Whenever I had a greater LOAD on the trans it would hiccup. If I understand this correctly the car commands a shift and then it starts looking at shaft speeds and it expects them to come together at a certain rate and in a certain amount of time. If that does not happen, the TCM sends a signal to the engine to reduce torque. That is the hiccup. My Frostbite RedEye was severely hitting the rev limiter But I was still told that more operating pressure might have fixed it. Higher operating pressure would make the trans shift harder and faster possibly eliminating the hiccup. By satisfying the shift logic and eliminating the torque management from kicking in or possibly by pulling the RPM down away from the rev limiter.

Or you can tell it to shift sooner or raise the rev limiter etc......

My Super Stock would definately hiccup when the Transmission LOAD was higher and it worked perfect with reduced load.

I wanted to provide a follow up to this info. Apparently when the 2020 Super Stock I had was set on Kill and in -1000 foot DA it would in fact accelerate so fast that it was getting into the rev limiter on the 1-2 and the 2-3. Adding pressure did complete the shifts faster and therefore pull the maximum RPM down away from the rev limiter.

So apparently it would have different issues depending on how it was set up and the DA.

Example: At Rockingham I had the street wheels and tires on the car. 30" tall rear tire and much heavier wheels and front tires. On Saturday early I was the first car in the staging lanes. It was cool and something like 9AM. I did exactly 1/2 mile warmup drive. So the blower was stil cold to the touch. Car ran 10.02 and that was WITH a massive 1-2 hiccup. Not long after that with the car fully warmed up there was no hiccup. Third pass with the DA moving up and the engine warmed up, no hiccup. Then I added 100 pounds of sand to the trunk to try and make the 10.50 index. Instant return of the 2-3 hiccup. So the first pass was the rev limit on the 1-2 and the first pass after adding the weight was the 2-3 shift not completing fast enough.

 

[Hpmaniac]

My 2019 had this issue from 2nd to 3rd anytime I had really good traction. So far I've not experienced it at all in my 2021 superstock. The tranny shifts really hard and fast in track mode, maybe to hard.