02-05-2007, 11:08 PM
Join Date: Jan 2007
Location: Las Vegas
Total Cats: 0
so-so compression, now what?
So, I've been driving the '90 for 8 months now with no problems. Went from 193K miles to 196K miles.
My daily driver is now paid off in full so I can spend that cash modding the Miata.
Took her to a trustworthy local shop the other day to get a compression checked and leak down test. Leak down was apparently fine.
Compression was 119, 120, 119, 118
Now, from what I gather 130-150+ psi is ideal. The good thing is that they're all nearly identical. According to the last owner (who was a trustworthy old rocket scientist, literally, who'd owned/sold 20 Miatas) his friend had the engine rebuilt at 160K.
So -- if I'm not looking to have more than 8 psi boost or more then 5K miles a year on the car over the next few years -- does anyone foresee a problem? Oh, and the wear and tear of how many autocrosses I can get to every year. Or, should I try to do a swap (1.8 possibly)? Or, should I sell the car what I paid for it (2 grand) and hunt for another? I'm sure I can get what I paid for it if I'm patient.
Anyway, I'm kinda hoping the answer is: "just boost it -- if the motor goes to hell, buy another." I've gotten kind of attached to the car.