Flat tappet lifter failure

[Terry Cain]

Just like the lifter rule change I would like to see because of failure (not because of performance) alot of the Super Stock guys wanted heads that were not leakers and not necessary faster.

In that case just get rid of stock all together. If there is no difference between the 2 other then tire size why have it at all. One class. Take your stocker and bracket race it locally or turn it into a street car. Big savings there. Run the money racers at your own level. Problem solved
When this happens I’m out. It will be time for a new hobby. I love the performance aspect of our sport while it lasts

Originally Posted by e vassar

Unpopular statement..but true..
All the rules, rules changes, AHFS etc come down to one thing in the eliminator. "Do I have enough, have I worked hard enough, have I SPENT enough to survive a heads up run?"
Get rid of heads up runs (except for class eliminations) and watch the cost go down,and the participation go up.
Flame away!...I'm ready

[Dwight Southerland]

The AHFS and the "political influence" factoring is what determines so much of competitiveness for any combination. So why not do something to truly reduce the cost, like a limit on valve spring pressure? There is more technical challenge and expertise with more limits than with fewer.

[Billy Nees]

^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
I wish that I could "like" this more than once!

[Stan Weiss]

Originally Posted by Terry Cain

Curious how many have had this problem regardless of reasoning in last 5 years or so.

Terry,
Since it seems getting lifters is a problem. Is the cam still OK? If so have looked for someone who can resurface those lifters?


Stan

Originally Posted by Dwight Southerland

The AHFS and the "political influence" factoring is what determines so much of competitiveness for any combination. So why not do something to truly reduce the cost, like a limit on valve spring pressure? There is more technical challenge and expertise with more limits than with fewer.

The System has loopholes that need to be addressed.
This will not be popular but Pulling a combination Advertised HP backwards is not performance based. *** This might be correct for a few combinations but look at the HP on some of the popular cars now.
There goes my Christmas cards …

[JGrossijr]

It appears that some on this site may be in the wrong class or running the wrong combination. To those, please pick something that fits your personal agenda and leave the silent majority alone.
Thank you,
Jim Grossi

[Alan Roehrich]

I'm hearing the rule change is "out of the question", which is a great thing.


Was in the shop with a legend yesterday, he's raced as long as I have lived. All he said was "them boys will keep on and they'll be in Super Stock soon."


The lifter change is NOT a solution. It won't prevent failures. Roller lifters fail, too. And it is just as catastrophic. It would require an entirely new lobe design, you don't just stick roller lifters in on the cam you have. Flat tappets can actually accelerate FASTER at a certain point. But then the roller comes into its own. If you change to roller lifters, you need different springs, and different pushrods. The stud mount rocker cars will snap rocker studs like twigs. The cars allowed 0.875" and 0.904" lifters will have access to better lobe profiles, and have fewer roller lifter failures.The stud mount rocker cars will also rip the rocker stud bosses out of the heads. Current valve spring technology will allow the use of lobes that will extend the RPM range, by 1,000 RPM.


The introduction of roller lifters will simply begin series of escalations that will take 3-5 years to develop, and cost thousands upon thousands of dollars. It will alter the factoring drastically. If anyone ever lets that genie out of the bottle, the class will be wrecked for years.

[Alan Roehrich]

Originally Posted by e vassar

Unpopular statement..but true..
All the rules, rules changes, AHFS etc come down to one thing in the eliminator. "Do I have enough, have I worked hard enough, have I SPENT enough to survive a heads up run?"
Get rid of heads up runs (except for class eliminations) and watch the cost go down,and the participation go up.
Flame away!...I'm ready

Without heads up races and class eliminations, Stock and Super Stock literally have ZERO reason to exist. Period.

[MR DERBY CITY]

Originally Posted by JGrossijr

It appears that some on this site may be in the wrong class or running the wrong combination. To those, please pick something that fits your personal agenda and leave the silent majority alone.
Thank you,
Jim Grossi

Bravo, everyone knew the rules when they requested their permanent number years ago. While at the time I applauded the unlimited valve spring rule, it is a major reason contributing to runaway costs in stock eliminator. If you don’t agree with the rules OR heads up runs , JUST LEAVE ….run superstock, brackets ,….WHATEVER . ….Take your personal agenda with you as you close the door ……