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Author Topic:   Setting lash
dode
Dirt Forum Champ
Total posts: 613
posted July 12, 2005 09:43 PM  
You can find the lash with a dial caliper and a crank socket. Turn the crank till the take up lash is gone, record the number and this is your lash.

Take up lash is the part of the ramp that slowly moves the lifter to "take up" the lash so the valves don't get slammed into by the rocker. You'll be looking for a dramatic increase in speed of the lift per degree of rotation.


dode
Dirt Forum Champ
Total posts: 613
posted July 14, 2005 07:16 AM  
It's perfectly okay to play with lash settings for more power/drivabilty. As long as a valve doesn't hang open(too tight) you'll be just fine. Add .002 and your real close to what you need. I will move mine from increasing to decreasing as much as .030.

So, watch the ramp rates, As soon as you see a dramatic increase in lift, that's the intended lash setting. Most cam company's run between .016 and .026. If you get say...a lash take up of .016, close that up .002 to .004 for a cold setting and run the motor to finalize a setting. If it bothers you, you can find you take up setting and add .010. This makes sure your not keeping a valve open. As long as you are greater than .016 there's not much of a chance of that. Once you get your engine hot, reset to your take up lash, probably .016 for tight lash cam, and .026 for others. Let er cool completely and check lash to see what the difference is cold, and then use that No. for a cold setting next time to get yourself very close to a hot lash setting. E-mail me if I didn't explain it well.

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