Solid lifters in Stock
 

When the rule was changed to allow solid lifters in Stock eliminator engines that were previously hydraulic equipped, did racers change cams or just install solid lifters ? What typically would they set valve lash at ? Not looking for top secret info just a general idea.
I have seen solid cams run in engines (not NHRA stockers) with hydraulic lifters that seemed to work "ok" but never the reverse procedure,

Re: Solid lifters in Stock
 

Myself, I have just switched lifters. BUT, the pattern on the cam had to appear normal, I lubed the lifters just like installing a new cam. Put break in oil in the pan. Set lash and ran it for a Half hour at 2500. With a hydraulic cam there are no clearance ramps ground into it so I run lash tighter than usual. (under .010)

Re: Solid lifters in Stock
 

I installed solid lifters on hydraulic cam and was told by a well known cam grinder to set lash at .004 - works fine!

Re: Solid lifters in Stock
 

has anyone noticed a hp increase or a better et?

Re: Solid lifters in Stock
 

-With solids, you loose lift at the valve due to the lash under running conditions.

-With true hydraulics, the theoretical lash is '0'. In reality, there is some compression of the retained oil in the lifter. How much? .004? .006? More? less?

And since the lift is checked at '0' lash.....;) -Al

Re: Solid lifters in Stock
 

Going from non shimmed Hydraulic Roller Lifters to solid roller lifters. What would you expect to see as far as performance increase?

Re: Solid lifters in Stock
 

The way I see it...
Solid Lifters allowed an engine to spin tighter with the same Spring.

Over the years (decades) Hydraulics improved with Short Travel Lifters and other modifications to get them to behave more like a Solid Lifter.

Couple questions.
Are Solid Lifters Lighter than Hydraulics?

Do solids allow better ramp rates and duration?

Is there any improvement to valvetrain control?

Re: Solid lifters in Stock
 

Minus 4 thou lift not a big issue to me .Probably lose that much on the other side with hydraulics.
Last year, guys were talking .010.
Any more real world, hands on reports about lash from last season?

Re: Solid lifters in Stock
 

I am in the process of switching from hydraulics to solids on the same cam (originally ground by crane who was of little help to me) (maybe I talked to the wrong guy). Called Bullet, they were very very helpful and instructed me to swap to an "EDM" lifter @ .008 hot. I'm going to tighten the lash from there on the dyno to see if there's any + or - results. I hope there is a peformance improvement for me with lifters, pushrods, rockers and properly setup springs.

Re: Solid lifters in Stock
 

Treating your cam , Nitride or Cryo is worth looking into.