did you continue to use 98 oct or is it better to use 99+ oct?

 

Well, I don't know where to get 99+ fuel? 98 RON should be good enough because it's within factory specs....

 

You can safily advance it. MY workshop manual say 16 degrees +/- 2 degrees. 98 or 99 octane should not matter. When you want to know it 100% exact, why don´t you go on a dyno do a run with 16, 14 and 18 degrees and look if something happens. It is possible that you lose power, when you advance it to 18.

 

My butt-dyno says I gained a bit. Not much.....

 

I doubt you can feel it. Perhaps there are 3hp difference.


[Modified by austrian type-R, 7:22 PM 5/14/2002]

 

Be careful with 18º.
Even with 98 octane you might have some detonation.

If you´re running high compression pistons retard it to 14º.

I had a bad experience on that.

Pinota

 

in the usa i put 93 for daily and when I race 100 octane
my dyno sheet was 200.8

 

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There are some in California running 91 at more than 20degrees, you will be fine.

 

ive done 20 degrees on 92 octane on 11.2:1 CR. I did how ever add some touluene so maybe it was around 94 octane

 

94 US octane = 98 RON here in Europe!!!!