RX8 Spring Meet ...::::NEW DATE:::... April 29th 2012
04-15-2012, 09:11 AM
#158
Hate Scrape 8
Thread Starter
I dont know if i should get a compression test done..I feel like my motor is good, mazda did a compression test on mine already, im just worried if they fudged the numbers.
04-15-2012, 09:27 PM
#169
I will be onsite by 8:30 am
The current list is the order I will follow should it be necessary (if there's already a line up)
That being said first come first serve, if no one else is there waiting.
What YOU need to bring:
1) Your motor presumably in your car (duh)
2) Remember to bring any special tools required to remove your wheel!
3) Your assistance and a Beer! The cost of the compression test is essentially free but your help and a charitable cold bevy is always nice. Cans bottles lager or ale its all good.
Tools I am bringing:
- Torque wrench 1/2 drive
- Johnson bar 1/2 drive
- 1/2 drive to 3/8 drive adapter
- Assorted 3/8 and 1/2 drive sockets
- 4 Jack stands (I'm not sure if we will use 2 or 1 per car atm)
- 1 hydraulic jack
- Some wood to drive up on (if we need it)
- Spare plugs
- Spare wires
Upon completion of the compression test you will receive:
1) A pat on the back
2) Your official Not a Newb fridge magnet
3) A form with all the compression particulars:
- PSI per face
- RPM per rotor
- Difference between chambers
- Difference between rotors
- Altitude compensation factor
- Dead Space compensation factor
- Normalized psi value using the Android app
There is also a Foxed.ca app that seems to give slightly higher numbers. This app has been "developed to be used with the TR-01" the compression tester I will be using. However I have some doubts about the validity of the calculations it is using.
Anyways, you'll have all the numbers you can plug in to it if you wish to use that Compression Calculator when you get home or using your smart phone web browser.
http://www.foxed.ca/index.php?page=rotarycalc
And while we are on the topic of Compression Calculators, remember this is not the same device or calculator Mazda uses. While the numbers should be close there is no way I can say for certain that Mazda will match the readings.
What these numbers will mean to you:
1) Yesss my compression was way over the minimum requirement set by Mazda. Then an actually test from Mazda should also show the similar results.
2) **** my compression is really low, then you should expect similar results of failure from Mazda
3) On no's I'm right on the border line! Well then its anyone's guess what Mazda might record for a compression test.
But wait WCS what about an RX7 can you do those?
Hell yeah, however:
1) I'm not that familier with the RX7 so it will be up to you to know how to kill the fuel and spark
2) We will need to use the foxed.ca app mentioned above
3) I do not know what the passing spec for compression is so its up to you to find that out for whatever model rotary you have.
The current list is longer than I anticipated but I still believe its doable, especially if everyone helps out and preps their own vehicle.
I think that's it boyz and girls ... I'm looking forward to meeting and seeing everybody.
Questions?
04-15-2012, 09:40 PM
#170
It will help WCS get through all the tests if everyone has their wheels off and car jacked up essentially "waiting" for WCS to walk over with the compression tester.
Get it ready down to having the plugs loosened in the motor (but not removed), don't want too much sand/dirt being being blown inside combustion chamber.
If everyone does that, the "prep" time for the compression test will bring it right down to under a few minutes (remove plugs/insert tester).
Agree to follow the list of sign up order.... if you aren't there when your turn is up, you will be skipped and when you are there, you will be inserted in the "next spot"
Get it ready down to having the plugs loosened in the motor (but not removed), don't want too much sand/dirt being being blown inside combustion chamber.
If everyone does that, the "prep" time for the compression test will bring it right down to under a few minutes (remove plugs/insert tester).
Agree to follow the list of sign up order.... if you aren't there when your turn is up, you will be skipped and when you are there, you will be inserted in the "next spot"
04-15-2012, 10:15 PM
#171
Registered
ok wcs ill come as early as i can, considering i only live 10 min away from the spot. but anyways instead of beer, can i bring coffee instead, since my gf is a manager in tim hortons i can get discount =D, ill be bringing their big party thermos, i guess thats what they call it and its like good for like 30 to 50 cups =), cool?
04-16-2012, 07:46 AM
#174
It will help WCS get through all the tests if everyone has their wheels off and car jacked up essentially "waiting" for WCS to walk over with the compression tester.
Get it ready down to having the plugs loosened in the motor (but not removed), don't want too much sand/dirt being being blown inside combustion chamber.
If everyone does that, the "prep" time for the compression test will bring it right down to under a few minutes (remove plugs/insert tester).
Agree to follow the list of sign up order.... if you aren't there when your turn is up, you will be skipped and when you are there, you will be inserted in the "next spot"
Get it ready down to having the plugs loosened in the motor (but not removed), don't want too much sand/dirt being being blown inside combustion chamber.
If everyone does that, the "prep" time for the compression test will bring it right down to under a few minutes (remove plugs/insert tester).
Agree to follow the list of sign up order.... if you aren't there when your turn is up, you will be skipped and when you are there, you will be inserted in the "next spot"
The test should also be performed on an engine that is still relatively hot ... so I'm not so sure that removing your plugs too far in advance if the queue is long is a good idea.
That being said ... for example ... if we had 5 cars show up and 5 sets of stands ..
Yes once the tires and plugs are out it only takes a few minutes to do the compression test. You could just knock the cars out one by one in no time.
How the Test is Performed
1) Start the engine and allow it to warm up.
(2) Stop the engine.
(3) Disable the fuel and ignition systems. You should consult your vehicles Factory Service Manual for the correct procedure to do this.
(4) Remove both front and rear trailing spark plugs.
***WARNING*** The sensor module should be hand tightened only into the spark plug hole. Overtightening will damage the rubber o-ring and could damage the sensor module.
(5) Thread the sensor module into either the front or rear spark plug hole.
(6) Connect the TR-01 to the sensor module.
(7) Switch the TR-01 power switch to ON.
(8) Fully open the throttle and turn the engine over for at least 5 seconds.
(9) The TR-01 will display results in realtime and the final reading will be displayed on the screen until the power is switched off.
The following is my estimated Compression Test Schedule
Please show up early.
Especially because I feel the time is way over exaggerated.
Compression Test:
1. maRs - 9:00 am
2. Blackstealth - 9:20 am
3. Rotary-RX8 - 9:40 am
4. Kafka - 10:00 am
5. c_ls - 10:20 am
6. JordysRX8 - 10:40 am
7. SSilver07- 11:00 am
8. Maffu313 - 11:20 am
9. Telek - 11:40 am
10. JRogersRX8 - 12:00 pm
11. FERA - 12-20 pm
12. RX8_Spidey 12:40 pm
13. Rev-illusions 1:00 pm
04-16-2012, 07:48 AM
#175
ok wcs ill come as early as i can, considering i only live 10 min away from the spot. but anyways instead of beer, can i bring coffee instead, since my gf is a manager in tim hortons i can get discount =D, ill be bringing their big party thermos, i guess thats what they call it and its like good for like 30 to 50 cups =), cool?
Epic!
Excellent, thanks