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Racingjunk Forums (https://www.racingjunk.com/forums/index.php)
-   Engine Tech (https://www.racingjunk.com/forums/forumdisplay.php?f=9)
-   -   Valve Lash and Cam Timing (https://www.racingjunk.com/forums/showthread.php?t=28628)

TheRabbit 08-21-2010 10:43 AM
Can you give us exact,step by step instructions as to how to make that popcorn?
1 Disconnect the battery.
2 Place in microwave and heat for 3 min. ( DO NOT BY ACCIDENT HIT 3000. AND LEAVE THE KITCHEN) I did this one time. I actually went to take a dump and hit 3000 on the micro wave. When I smelled the popcorn burning I hauled ass to the kitchen to find one hell of a fire in the microwave. The smell of burnt popcorn was so bad I almost had to leave the house and stay at a motel. I had to throw the microwave away and it was a christmas present I got the day before. (Stupid is all I can say):oops: It took weeks to get that nasty smell out of my house.

3rd. Open bag away from body. Contents may be hot. (No schitte)

suicidebomb 08-21-2010 11:40 AM
Originally Posted by Tod74
Originally Posted by suicidebomb
Originally Posted by cepx111
Originally Posted by kwkracing
If your in doubt go back to a hydrualic and leave it alone
lol.... :lol:

Valve lash threads, never fail to bring a few grins........It's almost a tradition.

Would anyone like some popcorn? BWAHAHAHAHA
Can you give us exact,step by step instructions as to how to make that popcorn?

http://forums.racingjunk.com/viewtop...er=asc&start=0

Nope, I do it the wrong way. :)

chevyart 08-21-2010 02:07 PM
valve adjust
 
thanks rabbit. maybe i was only going .002 loose now that i think about it. in any event i will adjust just as you say with the .002 number(looser) this sound just right and i am sure others will agree with this. its amazing how different metals respond to hot and cold art

traysvega 08-26-2010 02:28 PM
Originally Posted by sc4405
Originally Posted by traysvega
I've always adjusted them this way.Hot.
pop the distrib cap rotate(bump) motor to no. 1 on cap.Set balancer to TDC 0....Adjust both intake and exhaust for no.1 cylinder

Rotate counter clockwise 90 degrees or 270 on balancer and set both for no. 8

Rotate counter clockwise 90 degrees or 180 on balancer and set both for no.4

Rotate counter clockwise 90 degrees or 90 on balancer and set both for no. 3

Rotate counter clockwise 90 degrees or 0 on balancer and set both for no. 6

Rotate counter clockwise 90 degrees or 270 on balancer and set both for no.5

Rotate counter clockwise 90 degrees or 180 on balancer and set both for no. 7

Rotate counter clockwise 90 degrees or 90 on balancer and set both for no. 2

Rotate counter clockwise 90 degrees or 0 on the balancer and your back to no.1 again... :wink:

Button on firewall. and maybe 10 minutes.
Not sure I would do this on today's cam profiles. You are not necessarily on the lobe base circle when the piston is at TDC. Bet if you went back and checked using the EOIC method the lash would be different. On my 4-7 swap BBC the intake will not be fully on the base circle until the exh. is nearly fully open. 8) JB


I actually this weekend before the going to the track tried this...first my way HOT....Had 2 valves only a very very small amount loose..adjusted...Then second ran it again HOT and did the EOIC method....not one valve was different from my first adjustment.Not sure but my way works.I've done this long ago with the same results on a older cam profile roller with no difference so I continued on this fairly new profile (Crower Ultra action Roller).Not sure but think I'll continue with my FAST and efficient adjustment..Also if cold lash setting was the best way to do it,wouldn't you think ALL the cam Manufactures Cards would read "COLD LASH SETTING"....Instead of HOT ... :roll: make yeah go hmmmmm...

TheRabbit 08-26-2010 03:26 PM
I think 6 people could check 'em right now and still adjust 'em a little. In other words, I like it now go racing and have fun. :D

Scooterz 08-26-2010 04:14 PM
Re: valve adjust
 
Originally Posted by chevyart
thanks rabbit. maybe i was only going .002 loose now that i think about it. in any event i will adjust just as you say with the .002 number(looser) this sound just right and i am sure others will agree with this. its amazing how different metals respond to hot and cold art
AMEN. Hot metal expands... so you would think tighter lash/less forgiving.... Cold metal... NEVERMIND. I hate this crap.... I will just follow it & not try to understand at this point.

fla1976 08-26-2010 04:31 PM
After you have adjusted the valves hot you should be able to check them cold and use the setting as a reference point. It should be tighter due to the different expansion coefficients in the engine (Heads, block, rockers. valves, lifters, cam, pushrods etc,). Once you have the cold setting you can set them hot or cold. Just annotate the value on your cam card.

Tod74 08-26-2010 05:04 PM
Originally Posted by traysvega
[ it,wouldn't you think ALL the cam Manufactures Cards would read "COLD LASH SETTING"....Instead of HOT ... :roll: make yeah go hmmmmm...
They can't give you a cold lash setting because they do not know every componant of your engine...aluminum heads/iron block, or iron heads iron block etc..The reason the EOIC method works no matter what the cam profile is is because the way an internal combustion 4 stroke engine runs never changes. intake compression power exhaust. If the exhaust valve is opening there is no way the intake valve can not be closed because it just finished the power stroke and is starting the exhaust stroke...intake valve will always be closed...when the intake is on it's way closed then the engine is obviously about to start it's compression stroke. The exhaust valve will always be closed on the compression stroke,obviously.

cepx111 08-26-2010 10:40 PM
Originally Posted by traysvega
Originally Posted by sc4405
Originally Posted by traysvega
I've always adjusted them this way.Hot.
pop the distrib cap rotate(bump) motor to no. 1 on cap.Set balancer to TDC 0....Adjust both intake and exhaust for no.1 cylinder

Rotate counter clockwise 90 degrees or 270 on balancer and set both for no. 8

Rotate counter clockwise 90 degrees or 180 on balancer and set both for no.4

Rotate counter clockwise 90 degrees or 90 on balancer and set both for no. 3

Rotate counter clockwise 90 degrees or 0 on balancer and set both for no. 6

Rotate counter clockwise 90 degrees or 270 on balancer and set both for no.5

Rotate counter clockwise 90 degrees or 180 on balancer and set both for no. 7

Rotate counter clockwise 90 degrees or 90 on balancer and set both for no. 2

Rotate counter clockwise 90 degrees or 0 on the balancer and your back to no.1 again... :wink:

Button on firewall. and maybe 10 minutes.
Not sure I would do this on today's cam profiles. You are not necessarily on the lobe base circle when the piston is at TDC. Bet if you went back and checked using the EOIC method the lash would be different. On my 4-7 swap BBC the intake will not be fully on the base circle until the exh. is nearly fully open. 8) JB


I actually this weekend before the going to the track tried this...first my way HOT....Had 2 valves only a very very small amount loose..adjusted...Then second ran it again HOT and did the EOIC method....not one valve was different from my first adjustment.Not sure but my way works.I've done this long ago with the same results on a older cam profile roller with no difference so I continued on this fairly new profile (Crower Ultra action Roller).Not sure but think I'll continue with my FAST and efficient adjustment..Also if cold lash setting was the best way to do it,wouldn't you think ALL the cam Manufactures Cards would read "COLD LASH SETTING"....Instead of HOT ... :roll: make yeah go hmmmmm...
Some people like to get their fingers burnt and be in a rush, some dont.

I've personally done it both ways.

BUT, I never will adjust them HOT again sense I figured out I can do it just as accurately using the cold method.
Go ahead burn your fingers, do a rush job, make a mistake, see if I care :wink:

Tod74 08-26-2010 11:36 PM
[quote="cepx111"][quote="traysvega"][quote="sc4405"]
Originally Posted by traysvega
te] Some people like to get their fingers burnt and be in a rush, some dont.

I've personally done it both ways.

BUT, I never will adjust them HOT again sense I figured out I can do it just as accurately using the cold method.
Go ahead burn your fingers, do a rush job, make a mistake, see if I care :wink:
Chuck Norris uses the EOIC method with the engine running.


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