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Hey guy's
i was just wanting your opinion when it comes to 1.6 roller rocker's compared to the normal 1.5 ratio rockers?


what is the advantages and disadvantages of using 1.6 rockers??

I do know they make the lift on the cam bigger when using 1.6's but what is the down side??

Is there a sure fire way to check for clearance to make sure 1.6's will work ok with my valve train w/o taking the head off and ect'

I have a 406 with pop up piston's thats way I'm wondering if the 1.6's are going to be ok u know........ i have used 1.6's rockers on over 10 flat top motors before and never had any trouble at all.. also used standard push-rod,,,, but never with a pop up motor.... any info would help thanks
 

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I would not suggest using them. Here's why.
The formula for finding gross valve lift is:
cam lift x rocker arm ratio= gross valve lift
Using your cam as an example:
.525 lift with 1.5 rockers
.525 divided by 1.5= .350
.350 is the cam lift
.350 x 1.6= .560 lift
That is a lot of lift. Especially not knowing the valve to piston clearance. As far as I know,the head would have to come off to check this.
1.6 rockers also will increase your cam duration 2-3 degrees.:
Check to make sure the rocker arm does not contact the stud.( long slot rockers should take care of this).
Check to make sure there is no coil bind.
 
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