Cam&Lifter& valvelash?

MikeMoller · 02-06-2018, 10:27 PM

Wondering about the loss of lift running solid lifter. If you have to run lash but the cam is checked at zero lash by NHRA then you would have to lose some lift using solids. Question is, do you lose lift with a hydraulic lifter at zero lash or with some preload, and how much? Then is a solid lifter really the way to go?

Billy Nees · 02-07-2018, 08:32 AM

You not only lose lift. You lose duration too, and more than you would think.

Pat6868 · 02-07-2018, 10:51 AM

Treated cam, tool steel hydraulics plugged at .008, lash them where you like.

Alan Nyhus · 02-07-2018, 09:37 AM

Quote:

Originally Posted by MikeMoller

Wondering about the loss of lift running solid lifter. If you have to run lash but the cam is checked at zero lash by NHRA then you would have to lose some lift using solids.

Yep. Keeping as much lift and duration as you can is the key. Very tight valve lash addresses this. That's not a blanket recommendation, just a mechanical fact.

Quote:

Originally Posted by MikeMoller

Question is, do you lose lift with a hydraulic lifter at zero lash or with some preload, and how much?

Even with a true hydraulic lifter full of oil, there will be some amount of push rod cup movement (down) as it acts against the valve spring. How much is the question and depends on a lot of things.

Quote:

Originally Posted by MikeMoller

Then is a solid lifter really the way to go?

Maybe. Maybe not.

Good discussion.

-Al

GTX JOHN · 02-11-2018, 06:18 PM

I absolutely agree with both Derek and Alan.

MY boy will be testing the solids in his combo.....I will let you know
how it ends up!

02-06-2018, 10:27 PM	#1
MikeMoller Senior Member Join Date: May 2010 Location: Raleigh NC Posts: 637 Likes: 27 Liked 254 Times in 78 Posts	Re: Cam&Lifter& valvelash? Wondering about the loss of lift running solid lifter. If you have to run lash but the cam is checked at zero lash by NHRA then you would have to lose some lift using solids. Question is, do you lose lift with a hydraulic lifter at zero lash or with some preload, and how much? Then is a solid lifter really the way to go? __________________ Mike Moller NHRA 203 Q-R-T/SA

02-07-2018, 08:32 AM	#2
Billy Nees VIP Member Join Date: Oct 2002 Location: On a hilltop in Pa. Posts: 4,511 Likes: 3,621 Liked 7,901 Times in 1,754 Posts	Re: Cam&Lifter& valvelash? You not only lose lift. You lose duration too, and more than you would think. __________________ Billy Nees 1188 STK, SS I'm not spending 100K to win 2K

02-07-2018, 10:51 AM	#3
Pat6868 Member Join Date: May 2010 Posts: 103 Likes: 6 Liked 93 Times in 29 Posts	Re: Cam&Lifter& valvelash? Treated cam, tool steel hydraulics plugged at .008, lash them where you like.

02-11-2018, 06:18 PM	#5
GTX JOHN VIP Member Join Date: Jun 2009 Location: Boulder City, Nevada 89005 Posts: 2,741 Likes: 2,835 Liked 2,517 Times in 701 Posts	Re: Cam&Lifter& valvelash? I absolutely agree with both Derek and Alan. MY boy will be testing the solids in his combo.....I will let you know how it ends up! __________________ John Irving 741 Stock 741 Super Stock