How am I doing with these compression #s?
04-03-2012, 11:06 AM
#1
Grand Chancellor
Thread Starter
How am I doing with these compression #s?
Hi ya,
Based on my earlier thread (loss of power, poor idle): https://www.rx8club.com/series-i-trouble-shooting-95/power-loss-blinking-cel-rough-idle-231376/
I sent the car to my usual Mazda dealership that services the rx-8 and mazda6. They did a compression test. Here are the numbers...
Rotor 1: 8.0, 8.3, 8.1 @234rpm
Rotor 2: 9.0, 8.7, 8.7 @234rpm
I looked up the Workshop manual. And I think it is within specs. But what do you think?
They say I need new coil for Rotor 1. Other coils tested to be fine. Will also be replacing all 4 plugs irregardless.
Car has around 35,000 KM.
Based on my earlier thread (loss of power, poor idle): https://www.rx8club.com/series-i-trouble-shooting-95/power-loss-blinking-cel-rough-idle-231376/
I sent the car to my usual Mazda dealership that services the rx-8 and mazda6. They did a compression test. Here are the numbers...
Rotor 1: 8.0, 8.3, 8.1 @234rpm
Rotor 2: 9.0, 8.7, 8.7 @234rpm
I looked up the Workshop manual. And I think it is within specs. But what do you think?
They say I need new coil for Rotor 1. Other coils tested to be fine. Will also be replacing all 4 plugs irregardless.
Car has around 35,000 KM.
04-03-2012, 11:10 AM
#2
Registered
iTrader: (2)
Join Date: Oct 2007
Location: Pacific Northwest
Posts: 16,684
Likes: 0
Received 240 Likes
on
110 Posts
Those are fantastic numbers. Most new motors come in at mid-8s at 250rpm. Your slightly lower RPM should bias a bit lower than that. So your front rotor is basically as good as new, your rear rotor is better than typical for new.
Thread
Thread Starter
Forum
Replies
Last Post
Shankapotamus3
Series I Trouble Shooting
28
03-14-2021 03:53 PM
gwailo
New Member Forum
30
06-07-2020 12:21 PM