i will try to do mine soon, ive already been warned by the apartment complex for doing the suspension in the parking lot lol.

 

Hi John , Any news?

 

Hey Ash, still workin'! Yours is in the group to ship tomorrow. Once I have that group out then I'll be caught up. :-)
-John

 

Hey john,

gb is running smooth... any idea what group i am in and an a eta on shipping


hybrid from rx7 club

 

got mine monday,

was used monday night. not by me or with me there, but it worked like a charm..

great job john!

beers

 

Do not forget me......

So Phill didi you get a chance to use it yet?

 

No not yet, having problems. See your PM. Ray should be up soon and I'll try it then. If yours is going to be a while, let me know.

 

Indeed it was!

Thanks

 

has it been compared to the Mazda tester yet?

 

has the eagle landed yet? I would like a test plzzzzzzzz

 

Money sent, along with custom message

BLUE LCD please.

-Jon

 

Hi John,

Just tracking my TR-01...

Taken 6 days since you posted it to arrive here..!!!!

International Dispatch, May 27, 2009, 8:16 pm, FOREIGN CENTERJERSEY CITY NJ 099

I got a Filtermag from the US in 7 days to my door.

Sometimes you just can't work it out?

I guess it will arrive when it is ready to

 

I don't know about Australia, but a cool thing I noticed about Canada is that once it crosses the border, the tracking code for USPS works on CanadaPost's website, and they have more detail about where it is compared to USPS.... So check your local post website and see if the tracking code works there...

I'm thinking mine's in a batch that hasn't been -made- yet, lol. It would be nice to get the list on the first page updated so I can figure out how many are before me

-Jon

 

I'm sorry to hear it's taking so long Ash, I hope it gets there soon!

You are correct Jon, building in progress. :-) And I'm not able to edit the first post any longer to update it so I kinda just gave up on it.

-John

 

This thing still goin' on?

B

 

Got mine today, thanks man!

 

Got mine too this morning Down Under...Thank you John!
Ash

 

OK, John and Anyone else..

Even though my car is still new (6 months) I plan on doing a Compression Test annually and making a record of the results, PSI, Rotor, mileage and date, etc.

I think every year would be enough...what do you guys think, Please?

So, if I run my Test on Rotor 1 and get 115,114,115 at 280 RPM, I then have to do the conversion factor of times 1.039, I hate math!!!!..

So 115 time 1.039 = 119.48 or say 119 PSI for the RENNY RX-8 Rotary.

Is this correct guys??

Then obviously do the #2 Rotor (rear)..

Thanks in advance..
Ash

 

Absolutely!

Good to hear!

Your math is just fine Ash, that's exactly right. To finish your example it'd be:
Rotor 1, Face 1 - 115*1.039=119.48psi
Rotor 1, Face 2 - 114*1.039=118.44psi
Rotor 1, Face 3 - 115*1.039=119.48psi
And repeat for rotor 2 like you said.

-John

 

Hi all,

I tested the tester today against the Mazda factory one.....
The results are a bit confusing.

Here are the results, can someone please double check the math behind it??? I do not seem to get accurate numbers.

TR1 test, Rotor 1
RPM: 298
Face 1, 112
Face 2, 113
Face 3, 113

Rotor 2
RPM: 305
Face 1, 109
Face 2, 113
Face 3, 110

After applying the correction factor (1.039), and converting PSI to kPascal (1 PSI = 6.894 kPa), we get approximately:

Rotor 1
RPM: 298
Face 1, 112*1.039*6.894 = 802 kPa (rounded)
Face 2, 113*1.039*6.894 = 809 kPa
Face 3, 113*1.039*6.894 = 809 kPa

Rotor 2
RPM: 305
Face 1, 109*1.039*6.894 = 781 kPa
Face 2, 113*1.039*6.894 = 809 kPa
Face 3, 110*1.039*6.894 = 788 kPa

Now converting the first rotor with a correction of -90 kPa (because of higher revs) and the second rotor with -101 kPa (both found in a table from the Greek RX8 Club), I get the following final numbers....

Rotor 1
RPM: 250 (corrected)
Face 1, 712 kPa
Face 2, 719 kPa
Face 3, 719 kPa

Rotor 2
RPM: 250 (corrected)
Face 1, 680 kPa
Face 2, 708 kPa
Face 3, 687 kPa

The original Mazda Tester (used about 3-5 minutes later than the TR01) showed:
Rotor 1
RPM: 250 (corrected)
Face 1, 570 kPa
Face 2, 610 kPa
Face 3, 670 kPa

Rotor 2
RPM: 250 (corrected)
Face 1, 680 kPa
Face 2, 720 kPa
Face 3, 710 kPa

My concern is not about the difference in the "faces" as it might be in the wrong order, but the fact that rotors seem to be way off.
Now the question.....if the math is correct, could the difference depend on a wrong measurement induced by not depressing fully the throttle?
I am asking because the Mazda test was performed by myself (I was cranking), while on the TR01 test, I was holding the tester while someone else was (maybe false) cranking......

Any ideas?

Regards,
George

 

So you converted the Mazda tester to kPa as well? Because IIRC the mazda tester measures in kg/cm2...

Can we get the original Mazda compression numbers, uncorrected in any way, along with the rpm at which they were measured?

Since we already have those for the TR-01, it might help to figure out where the issue is.

Jon

 

You are right.....
The corrected values are (in kPa)

Rotor 1
RPM: 250 (corrected)
Face 1, 559 kPa (5.70 kg/cm2)
Face 2, 598 kPa (6.10 kg/cm2)
Face 3, 657 kPa (6.70 kg/cm2)

Rotor 2
RPM: 250 (corrected)
Face 1, 667 kPa (6.80 kg/cm2)
Face 2, 706 kPa (7.20 kg/cm2)
Face 3, 696 kPa (7.10 kg/cm2)

!!!!!!!!!

 

Hello George,
Thanks for taking the time to compare both testers together and for posting up the results. I think your math looks just fine. The second rotor appears spot on after correction but the first rotor is way off. Just to clarify, you were holding the throttle open during the Mazda test, correct? A closed throttle would cause lower readings. Was only 1 test for each tester performed? Would it be possible to retest this same engine using both testers again?
-John

P.S. - Sorry, I had to convert your numbers to PSI to keep my eyes from crossing!! Just for reference, here's what I got:

TR-01:
Rotor 1
RPM: 250 (corrected)
Face 1, 712 kPa = 103.3 psi
Face 2, 719 kPa = 104.3 psi
Face 3, 719 kPa = 104.3 psi

Rotor 2
RPM: 250 (corrected)
Face 1, 680 kPa = 98.6 psi
Face 2, 708 kPa = 102.6 psi
Face 3, 687 kPa = 99.6 psi

Mazda Tester:
Rotor 1
RPM: 250 (corrected)
Face 1, 559 kPa (5.70 kg/cm2) = 81.1 psi
Face 2, 598 kPa (6.10 kg/cm2) = 86.7 psi
Face 3, 657 kPa (6.70 kg/cm2) = 95.3 psi

Rotor 2
RPM: 250 (corrected)
Face 1, 667 kPa (6.80 kg/cm2) = 96.7 psi
Face 2, 706 kPa (7.20 kg/cm2) = 102.4 psi
Face 3, 696 kPa (7.10 kg/cm2) = 100.9 psi

 

Ordered mine a few days ago but rx8club account was only approved now. Forum name is thewird on rx7club . I'd like to have the personal screen as "Did she blow it yet?". Also, I forgot to mention I wanted the green screen. Thanks.

thewird

 

Thanks but I would still like to know the uncorrected values.... not that I don't trust the correction table from the other club, I just think that if we find an issue that having the original values and rpms might be more helpful than corrected ones...

Jon