Calling North DE, Philly, South NJ
#303
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iTrader: (9)
1. Chrishoky + 1 (compression tester guy)
2. Loyal8 (Shop family member)
3. GWillams6
4. Iamfodi (30K Maintenance)
#305
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Join Date: May 2014
Location: East Coast, USA
Posts: 53
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Actually... if this does come through (here's hoping!) I'd like to take the airbox off of someone else's 8 and observe the way the throttle plate behaves. That'd help me a hell of a lot in my diagnoses and repair of my issue.
I have a bluetooth OBD scanner to log some data, as well. It'd be really sweet to have some data to compare to.
I have a bluetooth OBD scanner to log some data, as well. It'd be really sweet to have some data to compare to.
#309
40th anniversary Edition
"I love it when a plan comes together" (from the "A" Team). I will be there at 10:30a . Let's just post up the address so no one gets lost. Thanks again to all, especially loyal8.
#314
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Location: East Coast, USA
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Enaris is in for a compression test for $40 10/12.
Maybe I'll grab a coil/plug kit and we can have a coil party. The plugs have to be removed to test compression anyways, is that right?
Maybe I'll grab a coil/plug kit and we can have a coil party. The plugs have to be removed to test compression anyways, is that right?
#315
Hey everyone this is Dave with the compression tester. I met some of you at the delaware riverfront this past spring. I had the grey turbo RX7. Sorry I couldnt make it out this past weekend but between weddings, family parties and disney Ive been unavailable.
Here is the compression tester I purchased, Model ReCT . I've used it on my car so far and I am looking to do a few extra tests of other cars to offset the purchase cost. If it will entice you guys I am willing to do a follow up test a year from now for free. Right now I really need to recoup that $400 though
Here is the compression tester I purchased, Model ReCT . I've used it on my car so far and I am looking to do a few extra tests of other cars to offset the purchase cost. If it will entice you guys I am willing to do a follow up test a year from now for free. Right now I really need to recoup that $400 though
#317
40th anniversary Edition
one question for Dave. Have you done a compression test yet on a RX8 ? Looking through the links to instructions for your tester, I don't see instructions for the RX8 Renesis engine. Maybe I am just missing something.
#318
I have not done a RX8 yet. I can email him to verify it works on an rx8 if that would ease your mind, otherwise I dont see why it wouldnt work. The housings are nearly identical to older 13b housings, you guys just dont have the right exhaust port
#319
40th anniversary Edition
I downloaded the instructions for the tester you have. I read it extensively and it looks like the key data for an RX8 is
"The workshop manual for the RX-8 states the “standard” compression as 120 PSI at 250 RPM,
and the minimum as 98.6 PSI at 250 RPM. Standard difference in chambers should be within
21.8 PSI, and difference between rotors within 14.5 PSI."
There seems to be a fair amount of calculating involved to get the reading for the cranking rpm . Important to have at or near 250rpm during test, or normalize it for the cranking rpm and for sealevel. The software on your computer hooked up to the tester has to be set up and reading the data does require some time.
I am saying all this can be done for sure, but even the instructions say this tester does not give the direct result readouts like expensive dealer compression testers. It is still worth the try, but it may be a more time consuming effort, so we should take those folks who really need it more in the time we have the shop. What do you folks think ?
Last edited by gwilliams6; 09-23-2014 at 12:31 PM.
#320
In the instructions he includes the formula to figure out the cranking RPM. It only takes a minute, and once the math is done for the first car, you substitute 2-3 numbers, plop them in and you get your cranking RPM.