Rockers still "clacking"

[Challenger340]

I still think you need to find out WHAT V/Springs are on the TF240 Heads ? Seated V/Spring Pressure and Rate ?

 

[khryslerkid]

Yes I pulled the inner springs during breakin and haven't replaced them yet,

Would adding the inners help with the slack/lack of tension that's more than likely making the racket?

 

[1 Wild R/T]

@PRHeads @Challenger340. Have you tried these....
https://www.summitracing.com/parts/cro-66031x3-16/make/dodge
I have a set in an engine I assembled three years ago, they've been quiet... Not that one three year old engine means anything but at least I like the concept of oiling the lobe similar to an EDM without loosing internal pressure which would cause the lifter to collapse..

 

[PRHeads]

I haven’t tried them myself, but I have a customer who’s putting them in a 440 now.
His combo will be E street heads and an under .500” lift cam with fairly smooth lobes.
Hopefully they work out for him.

 

[chtampa]

Would misaligned cam bearings do that?

 

[1 Wild R/T]

@John Tipps you mentioned that the heads were bought from Summit, do you have an invoice? That would give the part number which would solve the "what valve springs" question...

Also you mentioned it has "roller rockers" but no mention of brand....

End of the day it sounds like junk lifters but it would be good to make sure theres nothing that caused them to fail beyond the quality issue... Hopefully the cam hasn't been damaged...

 

[RemCharger]

Good point on the rockers..
Was there enough side clearance
Was it checked

 

[PRHeads]

The spring question is easily determined by measuring the diameter.
The small springs(the correct ones for a hyd cam) are 1.460”.

The next ones up are 1.550”.

 

[PRHeads]

Good point on the rockers..
Was there enough side clearance
Was it checked

I often take it for granted that this would have been checked, and corrected if necessary.
But that is often not the case.

 

[RemCharger]

I often take it for granted that this would have been checked, and corrected if necessary.
But that is often not the case.

I just put some together with with the comp pro magnums and there was not enough room. had to clearance about 30 thou out of the outer pedestals.

 

[PRHeads]

I just mocked up those rockers on a set of TF240’s myself.
I had to do the same thing.

 

[Challenger340]

@PRHeads @Challenger340. Have you tried these....
https://www.summitracing.com/parts/cro-66031x3-16/make/dodge
I have a set in an engine I assembled three years ago, they've been quiet... Not that one three year old engine means anything but at least I like the concept of oiling the lobe similar to an EDM without loosing internal pressure which would cause the lifter to collapse..

I haven't tried them ..... but I am curious as to "how" they are supplying extra Oil to the Lifter face given the Crower descriptive ?
I mean are they using a edm hole ?
or,
are they playing with Lifter Body OD's ? to leak more Oil out around the Lifter Body ?

"They deliver 20 to 30 percent more oil to your lobe and lifter faces for the best possible insurance against premature lobe and lifter failure. These flat tappet styles are available in a variety of outside diameters for proper fitment on specific applications."

 

[beanhead]

I haven't tried them ..... but I am curious as to "how" they are supplying extra Oil to the Lifter face given the Crower descriptive ?
I mean are they using a edm hole ?
or,
are they playing with Lifter Body OD's ? to leak more Oil out around the Lifter Body ?

"They deliver 20 to 30 percent more oil to your lobe and lifter faces for the best possible insurance against premature lobe and lifter failure. These flat tappet styles are available in a variety of outside diameters for proper fitment on specific applications."

The 'cam-savers' have a small groove down the side from the oiling band, kinda like those old chevy 6 cylinders did.

 

[1 Wild R/T]

I haven't tried them ..... but I am curious as to "how" they are supplying extra Oil to the Lifter face given the Crower descriptive ?
I mean are they using a edm hole ?
or,
are they playing with Lifter Body OD's ? to leak more Oil out around the Lifter Body ?

"They deliver 20 to 30 percent more oil to your lobe and lifter faces for the best possible insurance against premature lobe and lifter failure. These flat tappet styles are available in a variety of outside diameters for proper fitment on specific applications."

On the outside of the lifter body below the oil groove & down to the face they barely touch one spot with a cutter... They say it's .002

 

[Challenger340]

On the outside of the lifter body below the oil groove & down to the face they barely touch one spot with a cutter... They say it's .002

OK guys Thx....

Let's hope people have good experiences with them.