Solid lifters in Stock

Tim H · 09-03-2018, 09:02 PM

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,

Dave Noll · 09-03-2018, 09:53 PM

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)

Rsmith38 · 09-04-2018, 01:19 PM

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

David Lee · 09-04-2018, 01:50 PM

has anyone noticed a hp increase or a better et?

Alan Nyhus · 09-04-2018, 04:47 PM

Quote:

Originally Posted by David Lee

has anyone noticed a hp increase or a better et?

-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

Rob Petrie E395 · 02-03-2019, 10:22 PM

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

09-03-2018, 09:02 PM	#1
Tim H VIP Member Join Date: Jan 2007 Posts: 1,010 Likes: 898 Liked 430 Times in 142 Posts	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,

09-03-2018, 09:53 PM	#2
Dave Noll Senior Member Join Date: Nov 2007 Location: Div. 6, Eastern, WA Posts: 694 Likes: 2,260 Liked 219 Times in 105 Posts	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) __________________ Dave Noll, E/FS ,L/SA 6526 Last edited by Dave Noll; 09-04-2018 at 05:34 PM.

09-04-2018, 01:19 PM	#3
Rsmith38 Member Join Date: Mar 2011 Posts: 186 Likes: 0 Liked 28 Times in 15 Posts	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!

09-04-2018, 01:50 PM	#4
David Lee VIP Member Join Date: Oct 2007 Posts: 1,097 Likes: 404 Liked 250 Times in 101 Posts	Re: Solid lifters in Stock has anyone noticed a hp increase or a better et?

02-03-2019, 10:22 PM	#6
Rob Petrie E395 VIP Member Join Date: Dec 2007 Location: Woodlawn IL Posts: 1,093 Likes: 162 Liked 220 Times in 79 Posts	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?