I replaced my crappy gauge with a decent model.

Compression looks like

196
196
197
206

All plugs look alike and are a healthy grey without soot, oil or wetness.

Sweet. I'm ordering my BEGI-S tomorrow!

I wish I had the funds to go full MS, but that will wait.

Jim

 

Sweet, I think my first motor started out in the mid-150's across the board. Lasted 10k@12psi that little bitch did. Current motor has twice the mileage and twice the compression (figure that out)... you should do fine.

Big advice... as soon as you've gone MS, start buying internals as they pop up for sale.

 

What are the stock numbers supossed to be?

Ps: killer avatar samenavy

 

I read 193 on the 1.6 as a the spec compression... can't remember where I saw that.
Jim

 

That can't be right. My current motor has 260k miles on it and the number last month were 208/208/210/215.

 

13th December 2007, 04:15 #4
Bill Strohm
Supporting Member

Join Date: May 2000
Location: Fountain Valley, CA
Posts: 12,550

The newly-manufactured engine spec is 192 psi, from my 1990 factory workshop manual. Those are very good numbers.
__________________
---- Bill
Recovering Miataholic
Bill Strohm is offline Report Bad Post Reply With Quote

 

carbon build up? inaccurate gauge?

 

My 1.6l has 137k on it and compression is 210/210/205/210

 

Carbon buildup.

I'm jealous. My numbers are 145-160, but my motor's been through hell. 15+psi, more detonation than I care to talk about.