Which 3k Heads Gives Best Compression On 4k Motor

[David[RL]]

Hey

My friend has a ke70.. and he wants more power..

he's using the 4k engine, and I've heard 3k heads gives better compression

what has to be done to fit the 3k head, and which 3k heads are best, does it matter at all which 3k head we use?

I've found a ke30 on a local wrecker here.. with 3k/3k-c(I don't know)

:insane:

[Xany]

This page should give you some answers.....i found this ages ago when i was thinking about doing it to my 4K.........then decided to find a 5K

 

3K head conversion

[irokin]

Early KE20 heads

[David[RL]]

okay... so the 3k heads on early ke20 is the best one to use, but do all of them have higher compression than 4k heads or just that 3k-c one..?

how do you tell difference between a 3k and 3k-c?

[irokin]

well accually Id expect an early KE20 head to have much higher compression than a 3K-C head. 3K-C heads are only 8.5:1 where as the early KE20 heads are 9:1

 

Early KE20 is also where you'd expect to find big port heads. If your looking for some power gains, look for one of these....