hey
i just got an a15, which is stock standard. I have added twin 40mm dellortos and extractors but thats it. I have been told to shave the head 80thou to get compression up to about 10.1 and add a 30/70 cam. This should give around 120hp. I want around 130-140hp, so what have people done to their a15 to get this power. Could you give your head specs, cam specs and any other mods.
help plz!
cheers

upgrade ur ignition system because you will get a greater benefit from all your other mods if u have better plugs and an electronic dizzy. other than that keep up the good work and let us know when you get it in ur car (or ute).

yer ive heard a lot about new ignitions. What is the definitive reason for needing the upgrade? What advantages do they give and what do you upgrade to on an a15?

not having the points ignition is a good upgrade for a few $$ getting a later sunny dizzy with the electronic ignitor makes a stronger spark. If you have $$ to burn try an accel 300+ or MSD box.

Higher compression ratios need a stronger spark to jump across the plug, otherwise you can actually blow the spark out.

Get the head ported and matched to to the manifold, there are some top guys around, where are you located?

well im in melbourne. So basically, shave the head,port and polish, cam and a new ignition. What is the best cam spec for making around 120-140hp? What do other people use, is a 30/70 the way to go?