do you even gain anything if you only change cam
From what i gather, yes, but gains in HP are only small. (Plus, it's recommended you also re-shim your valves when swapping cam). It's not really the HP I'm after, but a change in the distribution of power though-out the rev range. Newman-cams and piper cam's have data sheets of what to expect from their cams, a fast road cam seems ideal but expensive. I was hoping a 866 would be a cheaper alternative.
To give you an idea of what my end game is, ill waffle-on a little about my first mode of transport. When i was younger, I had a DTR125 and was in to motor cross. My friend had a CR125 we used to rag around. Despite the DT and the CR sharing a small 125cc size engine, performance wise, the CR crosser was nuts in comparison.
The CR's top end was not as good as much larger road bikes, but 0-80mph it would put them to shame. gearing aside, I think it has a lot to do with the big bore or long stroke debate, that is prevalent in drag racing at the moe. I want to make my Punto the car version of that CR.
The 8v, I've been told, is a stronger engine and has more lower down torque than the 16v. Which is why i chose it for the base of my project. I'm thinking, higher velocity fuel and air feed, with longer valve open times should hopefully have the same effect as more valves, but with less moving parts.
I have limited funds for my new project, and see it taking a considerable amount of time due to saving for each part. I'm going to start with the fundamentals and see how much I can squeeze out of it NA before I bang on a turbo, blower or NOS.
I read yesterday in this forum, that a reader created a chip that's a straight swap for one in the ecu. it only costs £40, and has great reviews. I'm going to chuck one in the same time as i do the cam. A guy who did his cam wrote the chip works well with it.
