a friend and i are doing this mini-me swap on his civic dx. putting an ex head on it we got from Japan Direct out of Raleigh NC it also came with intake manifold and there are a few parts that were gonna have to change. but the thing i was wondering/worried about was that the pages that we have seen are saying that we're going to be getting about 12:1 compression that seems to me to be very high. they say to use 93 octane fuel but from what i have heard 93 may not be high enough and dentonation will become a problem. How safe for the motor is it to run such high compression?for anyone done this setup how did it turn out? any tips on what to or not to do? any input will be helpful? thanks

 

93 octane will get you up to about 12.5:1.

I don't think your compression will be that high though. :thinking:

 

umm compression shouldnt be that high but u should be fine as far as knocking goes, thats why the newer cars have knock sensors that retard the timing if they sense issues, but really unless uve got a really thin head gasket or uve changed pistons or shaved the head u shouldnt be that high... but whatever

 

Where are you looking? I seriously doubt that you will be anywhere near 12:1

 

might be 10.5:1 i got a d16a6 bottom and d16z6 head and i'm around 10:1 cr

 

a friend saw it on a site somewhere im not sure where though but the 12:1 was supposed to be with ZC pistons

 

oh then hell yea that sounds right... if you put ZC pistons in your car thats high compression right there! ZC pistions are domed thats why