Lifter rule in Stock

[Rick Schilling]

I know this should be obvious, but if your combination already uses hydraulic roller lifters you can convert to solid rollers now?

[Billy Nees]

Originally Posted by Rick Schilling

I know this should be obvious, but if your combination already uses hydraulic roller lifters you can convert to solid rollers now?

It seems to me that going from a heavy hydraulic roller to a (fairly) light race-type solid roller should do wonders for the RPM potential of a bunch of modern Stockers!

[Greg Reimer 7376]

Seems to me that after a lot of good intelligent questions have surfaced and been discussed, a rule clarification will probably be forthcoming. Yes, Billy, the solid roller lifter comment is a real good probability that RPM's might possibly be affected for good. I know that a mechanical lifter camshaft has clearance ramps included on each end of the lobe configuration to allow for lash, and that the overall lift also compensates for valve train lash. If you tried a set of mechanical lifters on your existent hydraulic cam, what would you use for lash on an initial effort before replacing the cam?We're talking going to a test and tune,not some kind of national event.

[jimi]

Originally Posted by Greg Reimer 7376

Seems to me that after a lot of good intelligent questions have surfaced and been discussed, a rule clarification will probably be forthcoming. Yes, Billy, the solid roller lifter comment is a real good probability that RPM's might possibly be affected for good. I know that a mechanical lifter camshaft has clearance ramps included on each end of the lobe configuration to allow for lash, and that the overall lift also compensates for valve train lash. If you tried a set of mechanical lifters on your existent hydraulic cam, what would you use for lash on an initial effort before replacing the cam?We're talking going to a test and tune,not some kind of national event.

been using solid lifters on hydraulic cam grinds for years in street cars adjust the lash at.006".

[Greg Reimer 7376]

I assume that would have to be at or near operating temperature. Also, how much would you gain over these "Limited Travel" lifters?

[sammy pizzolato]

This new rule is smart for us Racers that have lost good motors to those JUNK Ceramic Lifters!!!! and for NHRA to check cams.

[pfordamx]

Does this mean that Hydrualic rollers can be replaced with Solid Rollers?

[ron mattson]

Not sure in the roller stuff, but that is where
You would see the largest gain not flat tappets.

[Dan Fahey]

Originally Posted by jimi

been using solid lifters on hydraulic cam grinds for years in street cars adjust the lash at.006".

Could have a Max Spring Rule instead!
Simpler..
D

[Dan Fahey]

Holy Super Stock Batman !!!

Stockers with SOLIDS !

D