I'm looking at an engine right now that I might buy. It's a 93 D16Z6 vtec from a civic si. I checked it out and it seems to be in quite good condition. When I checked the compression, it read 165 155 170 170. Is it good? I'm not planning in building it much anyways. I need some input on this.

 

155 is getting a bit low..

my B16A was 210ish across the board

 

my d16a6 compression in an engine with 250,000 miles on it (no joke) had 185psi in each cylinder. If you're getting less than 160psi, you should check things, make sure your valve seats and/or piston rings are all seating properly.

 

Anyone else?

 

your fine.

 

I've got comp readings in the 160-165 area on my Z6. Also figure I've been running NOS for 1.5 years now (20+ bottles!).

 

What abt B16A, at what ratio is OK?

 

Eric B's B16A page said 185-135...personally i'd never touch anything lower than 160.

 

pull the oil cap and take a good look. sludge means poor maintenance. If it was clean and well maintained, i'd buy it.

 

my d16z6 read 195 all the way across, that hsould be good right.????

 

yes it is good. I must add that my readings were taken with cam retarded 3-4 degrees which will lower static numbers. I bet no with cam advanced 3 degrees (winter tuneup) I would get 185+ psi on a comp. test.

 

i have not done any kind of timing tuning on my engine (really needs it) and i did the compression test at WOT