cam duration

M_Body_Coupe said
What are you talking about???

Seriously, the OP asked a simple question: "..for an iron headed small block at about 9.5:1 compression...what is the least amount of duration you can get away with before you have detonation issues..."

So my response, as clearly stated, gave him feedback on what my experience is with an iron headed 9.7 measured static CR motor. Factory iron heads, open chamber. No recommendations of any sorts, just empirical knowledge based on my powertrain combo.

I clearly did NOT say "...you must run at least [email protected] on intake...or else..." to make this work on pump gas, right?

In fact, here is precisely what I stated: "...My cam is much bigger then what you are looking for though...so this is not a recommendation regarding cam size but rather a point of reference for what is working for me...".

Your cam has an advertised duration of 286/290 IIRC.

The OP is asking for an apple to apple comparison/references.

The OP also stated he is looking for "looking for shortest possible duration without having major detonation problems that has a smooth idle, doesn't load up and gets fair mileage (read short duration hi lift)
.. emphasis on lo rpm torque, don't want a big hp number, no racing, street car"

You are basically giving him a kumquat to use as reference for his question.

If knowledge is empirical, it's based on observation rather than theory. To do an empirical study of donut shops, you'll need to visit every one you can find.