Challenger Drag Pak Owners

[johnny shot]

I guess you have yet to be welcomed to a tear down party. It's hard to figure who gained piston to valve clearance on accident from unintended contact, and who gained it by a whack of the hammer on the end of a valve stem with the piston at TDC. Not that anyone would do that......

[Chris "drooze" Wertman]

I could see that on all 8

On 1 I couldnt, and there is an appeals process.....Nor could any reasonable tech.

Especially when that 1 isnt even the "highest" of the 8.....

Diamond pistons.....nuff said....

Originally Posted by johnny shot

I guess you have yet to be welcomed to a tear down party. It's hard to figure who gained piston to valve clearance on accident from unintended contact, and who gained it by a whack of the hammer on the end of a valve stem with the piston at TDC. Not that anyone would do that......

[johnny shot]

Hey, I'm on your side, just passing on real information on what has happened in the past. But to address a few of your questions, all your stuff could be "kosher", and still have contact. And I know you know this, but with duration not being speced, that could be the cause of contact, not just lift on a "legal" setup. And as you quoted from the rulebook, it does not say 1 of 8 is ok, or 2 of 8 is ok, its says it can not be modified. It does not say modified on purpose, or modified by accident. If you have two identical engines in tear down and one has "scuffs" on the piston or pistons and one does not, there may be a problem. A piston with a mark in it from contact with the valve is modified. From first hand experience you don't want to have a judgement call made at your expense. Carry on.

[Chris "drooze" Wertman]

Understood and appreciated....

In our case I know its not the duration or float, the clay test prior showed we were wayyyyy good.

On top of it the prior engine with slightly higher deck measurments was fine at 8k

Thats what leads me to believe something had to "stick" to cause this contact no other reasons exist...the cause of the stick ? But Ill be dammed if Im buying a $1500 set of pistons becuase a scuff on 1 of em..... Ill just richen it up a few passes carbon will hide it

The rules says Machined, in terms to the valve pockets, On these pistons the valve pockets correspond to the valve angle so when it hits it hits flat, which in this case was nice because it didnt "ding" the piston, rather left a scuff I could proabably clean off with scotchbrite.....

Originally Posted by johnny shot

Hey, I'm on your side, just passing on real information on what has happened in the past. But to address a few of your questions, all your stuff could be "kosher", and still have contact. And I know you know this, but with duration not being speced, that could be the cause of contact, not just lift on a "legal" setup. And as you quoted from the rulebook, it does not say 1 of 8 is ok, or 2 of 8 is ok, its says it can not be modified. It does not say modified on purpose, or modified by accident. If you have two identical engines in tear down and one has "scuffs" on the piston or pistons and one does not, there may be a problem. A piston with a mark in it from contact with the valve is modified. From first hand experience you don't want to have a judgement call made at your expense. Carry on.

[hemidup]

PTV contact? Ask Jason Line about it. He won his very first National event at BIR with his Buick GN. Upon tear down, it was noticed that there was PTV contact and his win was taken away.

Wasn't your new cam ground with a 4* advance already?

[Chris "drooze" Wertman]

Nope I had it ground straight 0

Originally Posted by hemidup

Wasn't your new cam ground with a 4* advance already?

[Chris "drooze" Wertman]

A note confirmed by Bruce B.

PTV Contact is NOT a DQ, it USED to be , it is NO LONGER. That when DURATION was in the mix.

#24 Is BACK Together and Ready for Testing.

Valve issue, combination of issues either my fault, clearances on Rocker setup and retainer choice, valve job was more aggresive and cutting of valves on this head setup, clearance I didnt like, looks like I had reason not to caused Lock condition on exhaust rocker. Confirmed by Pro Stock head guy that did our heads (independently), solved, reassembled.

See some track Saturday......

Adding second fuel filter and different alternator pulley

Zip Zap relax..........

Originally Posted by hemidup

PTV contact? Ask Jason Line about it. He won his very first National event at BIR with his Buick GN. Upon tear down, it was noticed that there was PTV contact and his win was taken away.

Wasn't your new cam ground with a 4* advance already?

[D.Holly]

Drooze, just want to say that I have been following along as you prepared for your first outing. I wish you and your Dad the best of luck.

[Rich Biebel]

Originally Posted by drooze

A note confirmed by Bruce B.

PTV Contact is NOT a DQ, it USED to be , it is NO LONGER. That when DURATION was in the mix.

#24 Is BACK Together and Ready for Testing.

Valve issue, combination of issues either my fault, clearances on Rocker setup and retainer choice, valve job was more aggresive and cutting of valves on this head setup, clearance I didnt like, looks like I had reason not to caused Lock condition on exhaust rocker. Confirmed by Pro Stock head guy that did our heads (independently), solved, reassembled.

See some track Saturday......

Adding second fuel filter and different alternator pulley

Zip Zap relax..........

When you get some time...enroll in a course that teaches English. And also how to type slow enough to form a sentence that can be easily understood by an average citizen of the realm like myself....


Or do you write and think in some sort of code that only Drag Pak owners can understand.......

After all these posts and blogs and
drives up and down the highways and broken stuff and missed dates ...I truly hope you make a run sometime soon.......Only probelm is it will percipitate an endless string of posts and blogs and probably more things gone wrong.

Make a run already!!!!!