flubyux2 said:
rich, i dont think you understand what you are asking me to do...
you want me to stop referring to various sized cams by any semblance of a name. perhaps you have a better way to differentiate between several cams? i mean, its not like I made up the names for these cams. HKS did.
and yes, i know you can have 2 completely different cam profiles and still call them both by the same name due to the seat to seat duration.
seat to seat of 272 doesnt mean shit, i know this... stop telling me this. i knew it 9 years ago. im not calling these cams by the names given to them by the retailers because i dont know any better, its because everyone ELSE is already familiar with the perceived stature of these cams amongst the tuning process.
the valve events are whats important. i had cam cards for a car that made 680rwhp at half throttle... a guy named atomic fabio, maybe you heard of him? i wish i still had those cards. the duration at 0.050" and the lift was pretty crazy. the actual duration was very very close to the advertised duration yeilding a really aggressive ramp profile, which is what id like to see in a custom cam... assuming the cams can be dynoed to help me decide what valve springs have to be run with those cam profiles to avoid float or bouncing on the seat because of the ramps.
Sorry buddy.. I am not trying to offend you. I know you know the difference between advertized duration and duration at .050
This is not what I was trying to say. It is lots of peoples fault on here that everyone seams to relate the size or power potential of a cam directly to its duration. This is the only web site i know that says duration in relation to a cam first. It is lift anywhere else that is aways mentioned first.
Since hks only has a few cam grinds, it is ok to say hks 264, hks 272, because everyone knows which cam its. But when people who don't know, start saying only 272 or 264 as a cam size, regardless of any manufacturer, then I feel like I have to pull my hair out. The reason, as you know, is that there is more to a cam than its duration. And to simply say that 272's are bigger and more powerful than 264's is wrong. Then every person who does not know, simply thinks this is the right way to measure a cam, then they run out and start buying the wrong cam for their set up.
People who know about cams have a duty to set this straight. Instead of asking " Do 272 cams make more power than 264 cams" We need to really ask" Do BC cams .324 lift 264 duration cams make more power than BC cams .353 lift 272 duration cams.
It is like saying are "265 tires better than 255 tires"? We don't know, Who made the tire, what is the rims size, what is the tread compound...
Gets worst when you ask about cams for a motor that 10 different manufacturers make a cam for.
Cams are referanced in terms of who made the cam first, lift second, duration third, duration at .050 fourth.
Leave out any of these four when speaking of cams in a compairitive way and the comparison means nothing. There are at least 10 more numbers to worry about when you really get into it. But to reference two cams, the 4 items above are enough.
