Another blown motor

[RGPIII]

I am curious as well if this is the 1st redeye motor to lose a rod...was it #7 as well?

In the pictures it looks to be the number 6 cylinder.

 

[Phast Hemi]

Do we know exactly how this happened? Did the guy have the shifter kicked over into manual mode ( to hold the car on the limiter)? Burnout in second gear? What is the history of this engine aside from the 90 dyno pulls and tuner change that we know of? Lots of things at play here. It is regrettable that the engine failed. Trying to use this situation to validate some generalized theory about an issue with these cars or their engines would not be credible. Lots of these engines are raced and possibly abused ( whether it is intentional or not). Still a relatively low fail rate for the abuse they are put through. I would suspect that Ford and Chevy have their issues as well...

 

[Speedy!]

This car was #3 cylinder.

@Speedy!
Top Cat engine is stock internals with Heads and Cam.

Linda

Good info Linda. So there ya go another one pushing some big power and living a long happy life. It's the rod break lottery over at Ma Mopar LOL

 

[Demon1]

^^ I agree but it does take practice and not everyone is used to this type of horse power.

True, but after anyone has done it three or four times, if they are paying attention at all, they should be able to "feel" the technique. Sometimes I wonder if anyone ever actually told them how to do a proper burnout. In this specific situation, the F8 had obviously been to the track a number of times since he had plenty of performance figures. It's like wheel hop - lift immediately when you feel it or you're asking for trouble. Use but don't abuse the equipment and people will have a lot more fun. And I'm not saying crap can't happen anyway, but you know the chances can be lessened significantly by how they drive. It's not always the tuner's or the equipment's fault. Driver technique/error is a significant factor too. I blew a motor a number of years ago because I was a bonehead.

 

[Demon1]

Do we know exactly how this happened? Did the guy have the shifter kicked over into manual mode ( to hold the car on the limiter)? Burnout in second gear? What is the history of this engine aside from the 90 dyno pulls and tuner change that we know of? Lots of things at play here. It is regrettable that the engine failed. Trying to use this situation to validate some generalized theory about an issue with these cars or their engines would not be credible. Lots of these engines are raced and possibly abused ( whether it is intentional or not). Still a relatively low fail rate for the abuse they are put through. I would suspect that Ford and Chevy have their issues as well...

I believe the article said he bounced it off the limiter in 1st and 2nd before he could catch it.

 

[firedude]

My redeye will hit rev limiter before it shifts just about every time 1st to 2nd and sometimes 2nd to 3rd. That is with trans in track. 1st to second in sport.

 

[Speedy!]

If it's stock that should not be happening and if modded properly tuned shouldn't happen either.

Stock, the factory shift point is set 200rpm below the revlimit.

 

[firedude]

Bone stock. I agree it shouldn’t be happening.

 

[motorhead]

This car had STOCK shift points. This car was tuned by someone I consider an EXPERT tuner AFTER it was worked on by an import shop.

The car was INITIALLY at an import shop and the tuner obviously didn't know Mopars and took an extreme amount of dyno pulls trying to dial it in, and it didn't run well (fast). Once the owner got with AJ, everything was sorted and the car made proper power and ran proper times.

Something seems to be up with some of the rods in these cars. I sent two Hellcat pistons from another failed motor and what was left of MY broken piston to 16GoManGo and he did some analysis on it and had one of his engine builders take a look as well. Both pistons I sent him had bent rods (I didn't notice when I had them, but once he mentioned it OBVIOUS). His engine builder suggested my rod had bent and that's what broke the piston in my car.

And what bends rods?

https://www.speed-talk.com/forum/viewtopic.php?t=37338

 

[Speedy!]

Wanna give me cliff notes? That thread is pages long and reading the entire first page of theories feels no different than us here LOL

 

[motorhead]

Wanna give me cliff notes? That thread is pages long and reading the entire first page of theories feels no different than us here LOL

Lots of things. Ignorance mostly.

Speed-Talk has a lot of really intelligent folks and is definitely worth the deep dive.

 

[72 440 Barracuda]

If it's stock that should not be happening and if modded properly tuned shouldn't happen either.

Stock, the factory shift point is set 200rpm below the revlimit.

Ok - so most of those that mention appear to A8 and the shift points are 200RPM below the rev limiter - at 6200 RPM? Just curious because I have a M6 and I have hit the rev limiter a couple times - should I be concerned with anything? (stock 2015 M6 Hellcat)

 

[firedude]

I have read where others are experiencing the rev limiter hit before shifting also on stock cars. Usually 1st to 2nd shift.

 

[Hemituner]

True motorhead but I believe he had a well known tuner

Sent from my SM-G950U using Tapatalk

And it took 90 dyno pulls to get the tune?

Lol maybe I misunderstood who tuned his Redeye and yes 90 pulls means pack up and go elsewhere

Sent from my SM-G950U using Tapatalk

So I have re-read the article and I think its pretty clear that it wasn't me that put 90 pulls on the mans car but anyway. Here is a perfect example of what happens out there. In this case the owner of this car realized something wasn't quite right with his car and believe it or not tried to go to my competitors. They all turned him away because they didn't build it and knew it could be a problem so rather than rise to a challenge they ran away. After getting some things mechanically straightened out we did 4 dyno runs on the car then headed to the track. For those who read the facts and just not that I was named in an article where an engine had failed, I am really happy that the car was saved that day on Woodward due to the selfless acts of strangers who were car enthusiasts. If your going to take away anything from this realize that everyone is asking way too much out of these cars . If you are in dis-belief that adding 300 WHP to a STOCK engine with powdered metal rods may result in a failure I don't know what else to say.
Kind regards
AJ

 

[Speedy!]

Ok - so most of those that mention appear to A8 and the shift points are 200RPM below the rev limiter - at 6200 RPM? Just curious because I have a M6 and I have hit the rev limiter a couple times - should I be concerned with anything? (stock 2015 M6 Hellcat)

In a 2019 RE, the stock limiter is set to 6500. The max shift point in the trans is set to 6300, but occurs a bit above that by the time the shift takes place....say 6420 or so in gears like 1st and 2nd.

 

[Octanewide]

So I have re-read the article and I think its pretty clear that it wasn't me that put 90 pulls on the mans car but anyway. Here is a perfect example of what happens out there. In this case the owner of this car realized something wasn't quite right with his car and believe it or not tried to go to my competitors. They all turned him away because they didn't build it and knew it could be a problem so rather than rise to a challenge they ran away. After getting some things mechanically straightened out we did 4 dyno runs on the car then headed to the track. For those who read the facts and just not that I was named in an article where an engine had failed, I am really happy that the car was saved that day on Woodward due to the selfless acts of strangers who were car enthusiasts. If your going to take away anything from this realize that everyone is asking way too much out of these cars . If you are in dis-belief that adding 300 WHP to a STOCK engine with powdered metal rods may result in a failure I don't know what else to say.
Kind regards
AJ

I never said you did 90 dyno pulls and after reading it again realized that. Was his engine hurt by the "other" tuner who did those 90 pulls and was clueless? I'm sure it was but your tune was on the engine when it blew so no disrespect to you and I'm sure no matter who followed the "other" tuner the same thing would have happened. My take on these failures is you better know exactly when your trans is shifting and the one common failure I've seen even from a non tuner perspective is the higher than normal rpm mixed with just about anything not right with the motor then Kaboom..

Sent from my SM-G950U using Tapatalk

 

[MaxCarnage]

Revlimter is a revlimiter. This owner didn't push through, he just bounced off the stock setting. I don't run my car in manual, but does it actually hit the revlimiter and not shift up in "M" manual mode? I know in paddle mode which I use often, it shifts up appropriately and that's what I use in the burnout box. I've not seen a reason to use manual mode personally.

In manual mode the car will bounce off the rev limiter if you let it and don't shift. In drive using paddles it will auto shift up. Until I dyno'd my Redeye I've have had no use for manual mode. For the dyno it was nice though so I could rev it to redline, without it auto shifting. Otherwise I see no use for manual mode imo.

 

[Markp]

I was in the staging lanes at the track and some guy came over to my passenger window to tell me my tape on my fender was coming off. I had to lean over to hear him because I had my helmet on. My arm must have been on the shifter and when I leaned back I must have knocked it into first. I did my burnout and somehow never noticed it was in first. The guy threw me off my ritual and I was off my game. I lined up and let her go and bounced off the rev limiter halfway down the track. I feel like a jackass even telling you guys. Car runs great and got my personal best the next day. This was with 1000 miles on the car. So yes it will stay in first.

 

[Speedy!]

Well, all I can say is I added a 150HP, maybe 175HP to mine and it broke.

 

[motorhead]

If your going to take away anything from this realize that everyone is asking way too much out of these cars . If you are in dis-belief that adding 300 WHP to a STOCK engine with powdered metal rods may result in a failure I don't know what else to say.

Bingo, these engines are 8 to 9 tenths off the showroom floor. I've expressed this fact on a number of occasions since this piston/rod/rpm/shift point debacle began. Put an aftermarket rod and piston set in it if you want more.