Figured id share my garbage..

[Turbo440Dart]

Car is supposed to be at Pomona to race in 16? Days. Not a problem. Won’t have a replacement piston till next week sometime. Gonna roll bearings in it and brake clean what I can out of it. Dingle ball the bore and pour the coals to it.


Hey @TT5.9mag there’s cold snacks in the fridge with your name on em.

 

[MOPARMAGA]

Car is supposed to be at Pomona to race in 16? Days. Not a problem. Won’t have a replacement piston till next week sometime. Gonna roll bearings in it and brake clean what I can out of it. Dingle ball the bore and pour the coals to it.


Hey @TT5.9mag there’s cold snacks in the fridge with your name on em.

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****.

 

[Bobzilla]

It’s the “not recommended for boost” part that gets me with the pistons

I was reading back through this one again to see what those pistons were. It never would have broke if you had not said this in post 316.

 

[TT5.9mag]

Car is supposed to be at Pomona to race in 16? Days. Not a problem. Won’t have a replacement piston till next week sometime. Gonna roll bearings in it and brake clean what I can out of it. Dingle ball the bore and pour the coals to it.


Hey @TT5.9mag there’s cold snacks in the fridge with your name on em.

View attachment 1716485730

View attachment 1716485731

View attachment 1716485732

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You know I’m there. I still cannot fathom how the middle ring land breaks out of a piston. I’ve got calls/texts out to guys smarter than me to see what they say. Anyone here on FABO have any ideas? Look close, it torched a second ring, and broke the middle ring land. But didn’t touch the top of the piston or top ring.

 

[tjpatte]

Ouch, sorry to see that Man!

 

[Bobzilla]

You know I’m there. I still cannot fathom how the middle ring land breaks out of a piston. I’ve got calls/texts out to guys smarter than me to see what they say. Anyone here on FABO have any ideas? Look close, it torched a second ring, and broke the middle ring land. But didn’t touch the top of the piston or top ring.

I was reading back through to see if the ring gaps were mentioned but I have not seen that yet. Any chance it actually butted the second ring, breaking it first and torching it second? I am not experienced in boost, so I am asking honestly if that can happen.

I don't really understand how it can get enough heat between the rings like that, unless it just broke first and then oil got in.

Edited for spelling. Change, not change.

 

[71GSSDemon]

You know I’m there. I still cannot fathom how the middle ring land breaks out of a piston. I’ve got calls/texts out to guys smarter than me to see what they say. Anyone here on FABO have any ideas? Look close, it torched a second ring, and broke the middle ring land. But didn’t touch the top of the piston or top ring.

I will send the pics to some piston engineers at work tomorrow. Not sure who will be in on a Friday, but can chase it again on Monday.

 

[TT5.9mag]

Any change it actually butted the second ring, breaking it first and torching it second?

I thought the same thing. And asked if there was a way we could measure the 2nd ring gap, but it’s in too many pieces.

 

[Turbo440Dart]

Ouch, sorry to see that Man!

It’s part of the game. I’m actually enjoying working on the car again and being semi under pressure to make this race. Been a long time since I’ve actually enjoyed it.

 

[TT5.9mag]

I will send the pics to some piston engineers at work tomorrow. Not sure who will be in on a Friday, but can chase it again on Monday.

Please do. It would be interesting to hear more ideas.

 

[Turbo440Dart]

I was reading back through to see if the ring gaps were mentioned but I have not seen that yet. Any change it actually butted the second ring, breaking it first and torching it second? I am not experienced in boost, so I am asking honestly if that can happen.

I don't really understand how it can get enough heat between the rings like that, unless it just broke first and then oil got in.

Believe I set the gaps to .030 top ring .032 2nd. Had plenty of ring gap in it. With that being said it’s not out of the realm of possibility that I messed up while rushing it together, I’d just think it would have shown its face much sooner. I won’t rule anything out.

 

[71GSSDemon]

I thought the same thing. And asked if there was a way we could measure the 2nd ring gap, but it’s in too many pieces.

Pull another piston and check 2nd ring gap just to see??

 

[71GSSDemon]

I will be at the dyno session of a buddy's 528 hemi. I can ask them on Sat also.

 

[TT5.9mag]

Pull another piston and check 2nd ring gap just to see??

Probably not enough time to do that. Maybe.

 

[71GSSDemon]

To me, the shiny ends of the crack is typical of chatter/movement. Seems both ends started and broke out the center.

 

[TT5.9mag]

To me, the shiny ends of the crack is typical of chatter/movement. Seems both ends started and broke out the center.

View attachment 1716485748

Funny you say that, there was odd markings in the bore that in my tiny little brain were reminiscent of ring flutter.

 

[MOPARMAGA]

Believe I set the gaps to .030 top ring .032 2nd. Had plenty of ring gap in it. With that being said it’s not out of the realm of possibility that I messed up while rushing it together, I’d just think it would have shown its face much sooner. I won’t rule anything out.

There's a pretty interesting total seal video on ring gaps with lake speed junior you might wanna check out.

 

[TT5.9mag]

How bout possibly breaking the second ring land on assembly? Pushing the piston down with the second ring not compressed all the way?

 

[TT5.9mag]

There's a pretty interesting total seal video on ring gaps with lake speed junior you might wanna check out.

Link please.

 

[Turbo440Dart]

How bout possibly breaking the second ring land on assembly? Pushing the piston down with the second ring not compressed all the way?

Used the ARP 4.320 compressor. From memory none of them caught awhile going in.

 

[TT5.9mag]

Used the ARP 4.320 compressor. From memory none of them caught awhile going in.

Trying to think of possibilities that don’t involve cumbustion gas. It’s so hard for me to see that happening from heat in the chamber. Unless the top ring gap was like an inch wide.

 

[71GSSDemon]

Id pull another piston or 2 and check those gaps for reference

 

[Bobzilla]

Is there something inside the oil ring? I guess that could be something in there after the damage started.

 

[71GSSDemon]

Is there something inside the oil ring? I guess that could be something in there after the damage started. View attachment 1716485759

Looks like glare/reflection to be if zooming in

 

[MOPARMAGA]

Link please.

Fine lol