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62hypapak
 Post subject: Cam stops
PostPosted: Tue Nov 23, 2010 6:55 am 
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Does anyone have any pictures? What are the advantages? Should they be instaled in a long rod slant?
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Doc
 Post subject:
PostPosted: Tue Nov 23, 2010 8:29 am 
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I use cam stops on all the engines I build... it is an easy way to ensure that the cam stays where you want it.
DD

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Aggressive Ted
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PostPosted: Tue Nov 23, 2010 10:33 am 
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Supercharged
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Doc,

What is the best way to adjust it?
Do you have a gap measurement?
or it screwed down snug? tight?
How do you know when it is set correctly?

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Aggressive Ted

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74 Swinger, 9.5 comp 254/.435 lift cam, 904, ram air, electric fans, 2.5" HP2 & FM70 ex, 1920 Holley#56jet, 2.76 8 3/4 Sure-Grip, 26" tires, 25+MPG
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Doc
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PostPosted: Tue Nov 23, 2010 11:26 am 
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It is easy to adjust when building the engine. (oil pan is off)
Install the cam, timing set & cover, then push the cam "back & forward" while adjusting the ballscrew... until all the clearance (movement) goes away, then back off the screw a 1/4 turn and lock it down, with the lock-nut.
If done correctly, you will feel the slightest amount of clearance, much like adjusting the axle bearing end-play on an 8 3/4 rear end.
DD


Last edited by Doc on Tue Nov 23, 2010 11:58 am, edited 1 time in total.

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Polara1974
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PostPosted: Tue Nov 23, 2010 11:40 am 
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Location: Buenos Aires - Argentina
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I have always thougth that the cam bolt was tigth until zero movement was achieved, when you backoff the ballscrew 1/4 turn why you do that?
Once you cancel the movement on the cam and you have the oil pump gear ok with the cam I always thougth that there was no reason to give the cam any movement at all.

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Dart270
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PostPosted: Tue Nov 23, 2010 11:46 am 
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Friction and wear on ball.

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oldblue
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PostPosted: Tue Nov 23, 2010 11:48 am 
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Clearance is needed.Otherwise the adjuster will be in constant contact with the cam.
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Polara1974
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PostPosted: Tue Nov 23, 2010 12:08 pm 
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Quote:
Clearance is needed.Otherwise the adjuster will be in constant contact with the cam.
And for that here they put bronze in the tip of the bolt, or they even use a rocker adjuster. For both is OK to run zero clearence I think.

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madmax/6
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PostPosted: Tue Nov 23, 2010 12:42 pm 
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I do mine like Doc said,then fine tune after motor is broke in.lets the cam and gears settle to be where they want to bee.While the motor is running I screw it in till it just touches,then back it off a titch.Mark
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Reed
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PostPosted: Tue Nov 23, 2010 1:38 pm 
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Quote:
I use cam stops on all the engines I build... it is an easy way to ensure that the cam stays where you want it.
DD

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Is that the screw out of a mechanical rocker arm?

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Fopar
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PostPosted: Tue Nov 23, 2010 1:56 pm 
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YES

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Reed
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PostPosted: Tue Nov 23, 2010 2:50 pm 
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Sweet. I always wondered how Doc did that.

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slantzilla
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PostPosted: Tue Nov 23, 2010 3:49 pm 
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Quote:
Quote:
Clearance is needed.Otherwise the adjuster will be in constant contact with the cam.
And for that here they put bronze in the tip of the bolt, or they even use a rocker adjuster. For both is OK to run zero clearence I think.
If there is no clearance it will wear a cup in the head of the cam bolt.

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Joshie225
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PostPosted: Tue Nov 23, 2010 4:09 pm 
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Supercharged
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Last time I did this I had access to a lathe so I faced off the cam sprocket bolt and the rocker screw so they came together flat.

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madmax/6
 Post subject:
PostPosted: Tue Nov 23, 2010 5:49 pm 
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Turbo EFI

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I drilled a little cup in the center of the bolt.
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