about rising compression

[makalioska]

i wonder how much mm i could polish my 1g stock engines head to increase compression rate that i could use 98 octane fuel?
thanks 4 answers

 

[90TTalonAWD]

i'm not too sure people on here will know much about milling heads for increased compression ratio. I assume you are talking about an nt head?

 

[nightspeed87]

you mean shaving the head to raise compression.
And what do you mean you need to raise compression for 98 octane, who told you that.
You can use it now, or just raise boost/ and or timing slightly when you add the octane, but it all depends on your set up, but you dont need more compression for higher octane if thats what you were getting at.