Learn me the way of roller cams please - Hot Rod Forum : Hotrodders Bulletin Board
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Old 04-15-2005, 09:02 AM
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Learn me the way of roller cams please

heyas,i have been thinking about upgrading to a roller cam but have absolutely no knowledge about the set up.
currently my build is this,
------------------------------------------------------------------------
mid 70's 454
edelbrock cam #7162- Duration 240 /246 lift 560 /573 lobe seps 112
781 heads just cleaned up and rebuilt no serious porting
30 over domed pistons 10:1 ballpark comp
performer plus dual plane intake
3500 stall
411 posi rear

------------------------------------------------------------------------

the cam i'm looking at is a crane crn-139731 dur 226/234 lift 587/610 doesn't list lsa i'd like to be around 110 though.
------------------------------------------------------------------------
so assuming i go with this cam,
1.)is there any extra machine work that has to be done with the block or head?
2.)i assume i would have to buy the roller lifters?use the guide bar or no?
3.)what else?pushrods,springs i would say for sure,rockers?using roller tips now.

sorry so many questions,this is kind of an expensive venture and i'm just trying to amass all the info i can get from anyone who might have done a roller set up.this is not a daily driver.maybe 300 miles a year.

thanks all!

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Old 04-15-2005, 09:16 AM
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This is just my philosophy but I would take the 400-500 dollars that its going to cost you to upgrade to a roller cam setup and invest it in the cylinder heads.
Before making other things better I would always want the heads to be the best they could be.


Things you will need for roller cam are (adds up fast).

misc gaskets
cam
lifters
retainers for lifters
possibly different springs
machine work for retainers to clear valve guides at max lift

last 2 depends how much lift your new cam has
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Old 04-15-2005, 11:13 AM
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If you're using the Edelbrock setup that's listed on their website that uses the TRW L2399 pistons, then anything larger than the cam you're using won't fit for piston to valve clearance. You might squeak a few more thou's of lift out of it but that's about it. Those pistons are pretty limited for what you can get away with.
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Old 04-15-2005, 09:52 PM
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well thanks for the advice,actually the pistons are federal mogul 280 domes but the roller sounds like it would be more trouble than its worth anyway.not really any good machine shops around where i live anyway,none that i would trust doing that kind of work at least.i might just go with another cam with a lower lsa,i'm not sure yet how the change in duration affects power,i'm tracking that down now,ive heard small changes in dur make big differences in performance.
as far as heads,with any cam i buy to replace the eddy,i'd have to get new heads anyway.the spring kit from edelbrock had these rubber umbrella shrouds(called something like that)and all i know is i had to have something turned down so these umbrella things would fit over them.it was my first build and unfortunately i learned a few things the hard way,wish i had found this site when i was building it,lot of knowlegable people here that i could of gotten good advice from!
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Old 04-16-2005, 03:31 PM
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if you do go with the roller , don't forget to upgrade the distributer gear. a roller cam will eat a stock gear for lunch.
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