Roller rockers

[Brett_jjj]

You are much better off getting a cam ground up from scratch after talking to a cam specialist and telling them what you want from your engine. For instance, do you want the engine to deliver most of its power from low to mid way in the rev range, or do you want the engine to deliver most of its power from midway up to the maximum revs, the cam specialist will grind up a suitable cam spec that will give you exactly what you want from your engine, you just cant get this from when buying ready ground cam, or so-called "stage" cams. A lot of people go for the biggest cam they can find, and then wonder why the car is bad on fuel, wont idle properly, overheats and generally becomes a pig to drive in traffic. Most street engines will run best with a low to mid range cam spec, where most of the engines power is delivered from 2000-2500 rpm through to 4500-5000 rpm, a street engine is not continually running up at the the top of its rev range like a racecar engine is, so on the street you realistically want plently of power available from lower in the rev range.

 

[Jxfwsf]

along with a set of rockers, an adjustable timing chain set would go along way to customising power output, from memory +2 deg adv on the cam moves the power band approx 400 - 500 rpm lower, most of the set i've seen are in 2 deg increment from -6 to +6.

 

[appi11]

Only just got around to reading this, I think I'll go the 1.9
love the info tho