How much of the 3k head do you have to shave down to get 10:1 compression?

One would think not too much, maybe ask an engine reconditioners?

you need to CC the head as well as a cylinder, depends on what size bore.

I'm pretty sure its 70 thou

Cheers guys my mechanic will be cc'ing the head soon.I have anouther question is it possible to switch 4K stems, valves, retainers and seals into a 3K head obviously with customising the head?

Cheers guys my mechanic will be cc'ing the head soon.I have anouther question is it possible to switch 4K stems, valves, retainers and seals into a 3K head obviously with customising the head?

 

Anything is possible, the impossible just takes a bit longer. I am sure they are the same.

yes can use later ke70 valve guides ETC in a 3K head easy fit they fall straight in.

doesnt a 3k-B engine already has a 9.1:1 or something compression?. I'm really not sure though... read it somewhere, cos i have a 3k-b in my ke35.

Edited February 8, 200818 yr by old_skool_SR

Well if a stock 5k has 9.3:1 (IIRC) then I would hardly call 9.1:1 "high".

 

"High" compression doesn't start till atleast 10:1 if you ask me! :)

oops, sorry. yeah, i think 10 is the basis for high. ill edit it now. :)

Compression ratio:

3K 9:1

3K-D, 3K-B 10:1

 

According to Scientific Publications - Workshop Manual Series.(Corolla 1200)

Edited February 9, 200818 yr by harun

My worked 3k is 13.5:1, |blink|

 

cheers phatke30!