RE: Summmit cams

[Earl Helm <earlh@xxxxxxxxxxxxxx>]

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Agreed, if you already have your rockers. Sorry, I guess I miss read or read
something
into you message that was not there. I thought you were saying that since
they specked
1.5 rockers, then you should use them. Sorry. I always do the 1.6 arms. So
are you
running a 312 cam? That is a strong cam for the street. I am putting that in
my race
motor....

i agree earl, the point is, by putting 1.6 rockers on you are effectively
increasing the lift.

if you look at racer browns website they clearly state you need a 1.5/1.6
rocker combo to make them work effectively.
 i have a .598 lift, a 1.6 would act like a .632 lift roughly, if i wanted
that lift i could just use a bigger cam, its cheaper.

tom
65 satellite

--- Earl Helm <earlh@xxxxxxxxxxxxxx> wrote:


> 
> Tom,
> 
> All cam manufactures put out their cam specks based on what the stock 
> rocker ratio is for the particular car manufacturer. IE Chrysler uses 
> 1.5 rockers. But by using that as a base line, dose not preclude you 
> from using 1.6 or 1.7 rocker arms. You just need to make sure you 
> compensate for the additional lift and duration.
> One of the old
> Chevy tricks is to use 1.5 on the intake and 1.6 on the exhaust. You 
> can do the same thing with Mopars, based on what your trying to 
> achieve with your engine combo. It would be no big deal to throw a set 
> of 1.6's at your Ultradyne.
> 
> Earl
> 
> 
> Don said: >snip< "Ultrdyne has mopar specific but for me the lifts are 
> too high for the duration  which is do say they do not match the 
> reality of the iron head engnes."
> 
> thanks for using the "for me" in your message Don.
> 
> my car is a fully dressed street car running 11.30's, that is, all 
> steel, full interior, crank driven alternator and waterpump,the only 
> difference from cruise night is slicks. this is a true street car 
> which gets its share of street time!
> for further drama, it is stock crank, rods and ross flat tops, with 
> worked 452's, simply put this engine is really just heads and a very 
> nasty sounding (and performing} cam.
> 
> for me, it is hard to beat an ultradyne cam, for price and 
> performance. my car has had the same crane (1.5) rockers for many 
> years and a few different cams, but nothing will wake up the engine 
> like an ultradyne.
> 
> correct me if i am wrong, but the numbers for racer brown and 
> ultradyne are really not that different, when you consider racer brown 
> says that you must use
> 1.5/1.6 rocker ratios to get there cam to work. (1.6 translates into 
> higher
> lift?)
> 
> on the other hand ultradyne designs there cam for
> 1.5/1.5 rockers (99% of the mopars already have
> these)
> 
> 
> i have never run racer brown, if i have to replace my rockers someday, 
> i would likely look at them.
> 
> but you can't really compare racer brown to the others, since the 
> others are all designed for 1.5/1.5
> (normal) rockers
> 
> tom
> 65 satellite
> 
> 
> 		
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----
Please address private mail -- mail of interest to only one person -- directly to that person.  I.e., send parts/car transactions and negotiations as well as other personal messages only to the intended recipient, not to the Clubhouse public address. This practice will protect your privacy, reduce the total volume of mail and fine tune the content signal to Mopar topic.  Thanks!

'62 to '65 Mopar Clubhouse Discussion Guidelines:
http://www.1962to1965mopar.ornocar.org/mletiq.html. 



bOyW3N.