Could anybody recommend the amount to skim off an A15 head/ block to provide an improved compression ratio. I am currently running twin 40DCOE carbies and am about to fit factory +1 oversized pistons. A fast street cam is also on the cards if I can locate one (impossible in the UK) If anybody has a suitable cam and can post let me know. In fact any performance goodies that anybody has got to sell for the A15 I could be interested. A series performance parts are non-existant over here so I have to import everything.

Jeff Taylor is a great bloke and an absolute guru on the A series and will post overseas.
His website.

Thanks for the link

i rang up jeff a while ago now and he said if i want 10:1 comp with stock pistons on my a15 skim the head 40 thou and that should do it now all ive got to worry about is valve clearance when i get a bigger cam

Spot on. Thankyou.
How much benifit will using 99RON fuel make? This is the highest grade of pump fuel available here. Standard is about 97RON

well mate hear in australia we have unleaded and than premium with my a15 i run premium through it because it is a slightly higher octane fuel and is better for higher comp,if 99RON is the highest grade fuel from the pump over your your way i would say your "99RON" is similar to our premium so i would say thats the way to go and also i chose to not go any higher in compression purely so i could get fuel from the pump not having to specially get a higher octane fuel after all it is a road car i hope i have helped

ur premium aint that high 99 is good ####,i think ours is like the 97-96 mark

edit: im lost wat cars are they???

Only shell do the 99RON fuel.
Available from the pump at most of there garages.
http://www.shellpluspoints.com/About/VPowerFuel.asp
It is good ****. My mate runs it in his 300ZX TT.
Premium from most other garages is about 97

The cars are Datsun 120A FII Coupes

you should still be able to use 97.

Some engine builders have been able to run 12.4:1 with 92.