Compression results
#1
How are my compression results?
I did my a compression test today on my 105k miles RX8, Here are the results.
All readings normalized at sea lvl and 250rpm With the engine warm. Readings are PSI
Rear rotor:
test 1- 89.90 / 90.84 / 91.79
test 2- 92.44 / 91.48 / 89.56
test 3- 92.44 / 90.52/ 93.41
FRONT Rotor:
Test 1- 88.79 / 89.75 / 92.65
Test 2- 87.82 / 88.79 / 92.65
Test 3- 88.79 / 91.68 / 88.79
Its just about time for the rebuild. Gonna get as much out of this motor as i can.
All readings normalized at sea lvl and 250rpm With the engine warm. Readings are PSI
Rear rotor:
test 1- 89.90 / 90.84 / 91.79
test 2- 92.44 / 91.48 / 89.56
test 3- 92.44 / 90.52/ 93.41
FRONT Rotor:
Test 1- 88.79 / 89.75 / 92.65
Test 2- 87.82 / 88.79 / 92.65
Test 3- 88.79 / 91.68 / 88.79
Its just about time for the rebuild. Gonna get as much out of this motor as i can.
Last edited by Tanner; 08-06-2022 at 05:46 PM.
#3
I used a ebay rotary compression tester. https://www.ebay.com/itm/323517659813
Warm engine and used trailing plug holes
Warm engine and used trailing plug holes
The following users liked this post:
Tanner (08-08-2022)
#5
Registered
Once you start dipping down past the 75-70psi range you will likely fall down the hot start rabbit hole. There's like 100 threads of various troubleshooting, just know that'll be the first sign of the engine being done. At this point your rotors are probably toast. Upgrading components like battery, starter, coils, plugs will only prolong a few hundred more miles till compression degrades to the point where the engine will stall at idle.
Considering you are running the engine into the ground are you already planning to get a reman engine? (My suggestion instead of rebuilding with bad components at that mileage....like I did)
Considering you are running the engine into the ground are you already planning to get a reman engine? (My suggestion instead of rebuilding with bad components at that mileage....like I did)
#6
Once you start dipping down past the 75-70psi range you will likely fall down the hot start rabbit hole. There's like 100 threads of various troubleshooting, just know that'll be the first sign of the engine being done. At this point your rotors are probably toast. Upgrading components like battery, starter, coils, plugs will only prolong a few hundred more miles till compression degrades to the point where the engine will stall at idle.
Considering you are running the engine into the ground are you already planning to get a reman engine? (My suggestion instead of rebuilding with bad components at that mileage....like I did)
Considering you are running the engine into the ground are you already planning to get a reman engine? (My suggestion instead of rebuilding with bad components at that mileage....like I did)
#7
Thread
Thread Starter
Forum
Replies
Last Post