the cam i am running is 263/263 @.050, they throw in, 290/290 @.020 with .598 gross lift. i do have a 312 cam (.640 lift) that i will let someone have for 100 bucks, it is a little too big for the street. tom 65 satellite --- Earl Helm <earlh@xxxxxxxxxxxxxx> wrote: ------------------------------------------------------------------- > > 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 > > > > > > > > __________________________________ > > Discover Yahoo! > > Find restaurants, movies, travel and more fun for > the weekend. 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