I just found out that the valves in the Patriot Freedoms are .100" longer so my stock length Comp.Cams rods are too short ! I don't have a length checking tool and being that I'm running 1.6 roller rockers is .100" longer rods enough or do I need more yet ?:beers::hurray:
Push rod length ?
madcarson
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I just found out that the valves in the Patriot Freedoms are .100" longer so my stock length Comp.Cams rods are too short ! I don't have a length checking tool and being that I'm running 1.6 roller rockers is .100" longer rods enough or do I need more yet ?:beers::hurray:
Re: push rod length ?
I agree with Doug^.
If you have ever seen a spinitron test..you will see how crucial it is to not have any pushrod deflection.
This would be a good time to upgrade to a qaulity piece.
Manton..Smith brothers...Trend all come to mind.
Contact any one of the three for 1st class hardware.
Fwiw..I went with Trend for a 24 hr turn over time with custom lengths.
I agree with Doug^.
If you have ever seen a spinitron test..you will see how crucial it is to not have any pushrod deflection.
This would be a good time to upgrade to a qaulity piece.
Manton..Smith brothers...Trend all come to mind.
Contact any one of the three for 1st class hardware.
Fwiw..I went with Trend for a 24 hr turn over time with custom lengths.
Re: push rod length ?
I finally ordered a Comp.tool,I knew I should get one a while back but seems like a pain to always but a tool for 1 time use,but I guess now I have one for eveyone else to borrow LOL !
I knew the answer was to buy 1 but stubborn
I finally ordered a Comp.tool,I knew I should get one a while back but seems like a pain to always but a tool for 1 time use,but I guess now I have one for eveyone else to borrow LOL !
I knew the answer was to buy 1 but stubborn
Joined
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8,373 Posts
Re: push rod length ?
I did mine on the base circle. Seems to me if you changed lift in anyway, you'd need another set of P rods, and I don't think that's the case. So, for checking your length be sure to call Comp. They'll tell you how to check your setup. (hint) You'll be squaring the valve stem to rocker pedestal. Yeah, height is what this check is all about.
Re: push rod length ?
You got the ajustable length pushrod checkers ? (did't look up numbers)
http://www.chevyhiperformance.com/t...additional_tech/other/0911chp_how_to_check_for_proper_pushrod_length/index.html
You got the ajustable length pushrod checkers ? (did't look up numbers)
http://www.chevyhiperformance.com/t...additional_tech/other/0911chp_how_to_check_for_proper_pushrod_length/index.html
Re: push rod length ?
The Canfield heads gave you 1.900" valvespring height with stock valves and retainers.
Stock is 1.700 which limits pressures and lift.
Yes the improperly designed heads must use 0.100" longer valves to get any valve spring height.
The Canfield heads gave you 1.900" valvespring height with stock valves and retainers.
Stock is 1.700 which limits pressures and lift.
Re: push rod length ?
so I set up the tool in position where a lifter is sitting on the base circle (valve closed) correct ? tighten to zero lash then rotate eng.2 full turns,so do I check length at max lift or do I just keep chg length of checker until mark on valve is centered ?
Thanks for input !
so I set up the tool in position where a lifter is sitting on the base circle (valve closed) correct ? tighten to zero lash then rotate eng.2 full turns,so do I check length at max lift or do I just keep chg length of checker until mark on valve is centered ?
Thanks for input !
Joined
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602 Posts
Re: push rod length ?
the point of the pushrod length check is to make sure the rocker arm tip is running center of valve stem so as to keep valve stem /guide from being worn uneven as madcarson stated...
the point of the pushrod length check is to make sure the rocker arm tip is running center of valve stem so as to keep valve stem /guide from being worn uneven as madcarson stated...
Re: push rod length ?
I'm usingt Comp checker #7702. I did the marker thing, and had to turn out the adjustable pushrod TEN turns to get the wear pattern in the center of the valve stem.
The 7702 fully screwed together is 6.800" long. Ten turns @ 0.050"/turn is 0.500. Adding the two gives 7.3" desired length. So I order the 7.3" Comp Magnum and I should be good, right??
Doing this, I did notice that the difference between one turn on the adj. pushrod is very difficult to see on the valve stem pattern. In other words, it could have been NINE turns easily enough. Give me some good advice here.
Thanks,
RJ
I'm usingt Comp checker #7702. I did the marker thing, and had to turn out the adjustable pushrod TEN turns to get the wear pattern in the center of the valve stem.
The 7702 fully screwed together is 6.800" long. Ten turns @ 0.050"/turn is 0.500. Adding the two gives 7.3" desired length. So I order the 7.3" Comp Magnum and I should be good, right??
Doing this, I did notice that the difference between one turn on the adj. pushrod is very difficult to see on the valve stem pattern. In other words, it could have been NINE turns easily enough. Give me some good advice here.
Thanks,
RJ
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