TwistedRotors

The TR-01 is a digital hand-held rotary engine compression tester available as a more affordable option compared to similar testers already on the market. It utilizes a powerful micro-controller and a 0-200psi pressure transducer to detect the three distinct compression pulses of a rotary engine. These pulses, along with RPM, are then displayed on the back-lit LCD.



Group Buy price is set at $230 for each unit. You have a choice of either a blue or green LCD, please specify which color you'd like when you order. From testing I can say that the green LCD is easier to see in daylight, but the blue just looks slick! I need at least 10 orders to get this started.
Shipping will be via USPS Priority Flat-Rate mail and includes insurance. Unit price includes shipping to U.S. Addresses. Additional shipping required for non-U.S. Addresses is $37 ($21 to Canada).

Payments via Paypal: TR01@TwistedRotors.com (that is TR<zero>1)
Ensure that your shipping address in Paypal is correct and please include your forum name with the payment.
This Group Buy price will be good for 2 months, so get them while they're cheap!

As an incentive, during this GB I am offering an optional splash screen personalization for each unit. Upon power up, your unit will display the standard TR-01 splash screen with firmware version.



Then a personalized screen with your name will be displayed.



Original thread https://www.rx8club.com/series-i-tech-garage-22/new-compression-tester-handheld-digital-165870/
Testing a “blown” 13B-REW http://www.youtube.com/watch?v=dZG28b05H9k
Testing HeavyMetal699's RX-8 http://www.youtube.com/watch?v=4IjZH2Xongw

Technical Data:
Display: 16x2 LCD, back-lit (blue or green)
Maximum pressure reading: 200psi
Minimum pressure reading: 10psi
Measurement accuracy: <1% FS
Measurement time: <1.0 msec
Power source: 9 volt battery

Dead volume has been calculated and the correction factors are listed below. I decided not to code in an automatic correction as the number varies slightly depending on the engine type. For reference the internal volume of the sensor (with adapter) is 2.85cc. To correct for the sensor dead volume just multiply your readings by the correction number appropriate for your engine.
Engine Year Ratio Correction
12A 76-82 9.4 1.042
12A 83-85 9.4 1.042
13B 74-78 9.2 1.035
13B 84-85 9.4 1.036
13B N/T 86-88 9.4 1.036
13B T 86-88 8.5 1.032
13B N/T 89-92 9.7 1.038
13B T 89-92 9.0 1.034
13B T/T 93-95 9.0 1.034
13B Ren 04-on 10.0 1.039

Warranty:
The tester is covered for a period of 2 years from date of purchase. I will repair/replace any units that fail due to any defect in my manufacturing. Basically if it isn't broken due to abuse or misuse then I will fix it. Note that this does not include the sensor which will have to be on a case-by-case basis. These pressure transducers are heavy duty units designed for industrial applications so failure is highly unlikely. In the event that a sensor does fail I will work with the customer to get a replacement from the sensor manufacturer. With all that said, if you were to accidently damage your tester then let me know. I can work with you to get your unit repaired, I plan to keep repair parts/spare units for at least 5 years. I want everyone to be happy with their TR-01!



1. Texak - RX8Club - Blue LCD, "Property of ; Texak" - Payment Received, thanks!
2. Gvang - RX8Club - Blue LCD, "H.T.T.S. ; N. Theodosiou" - Payment Received, thanks!
3. Gvang - RX8Club - Blue LCD, " EasyTuning, RX8 Specialists" - Payment Received, thanks!
4. Swoope - RX8Club - Green LCD, "Swoope says ; Please be good!" - Payment Received, thanks!
5. Ash8 - RX8Club - Blue LCD, "Disconnect Crank ; Sensor FIRST" - Payment Pending
6. Phil's8 - RX8Club - Blue LCD, "Property of ; Phil's 8" - Payment Received, thanks!
7. RXnos1200 -RX7Club - Blue LCD, "Property of ; RXnos - JJN" - Payment Received, thanks!
8. CarbonRX8 - RX8Club - Blue LCD, "Property of ; CarbonRX8" - Payment Received, thanks!
9. atl8 - RX8Club - Blue LCD, "Property of ; pcoppinger" - Payment Received, thanks!
10. moRotorMotor - RX8Club - Blue LCD, "Property of ; Leo Tam" - Payment Received, thanks!
11. neit_jnf -RX8Club - Green LCD, "Property of ; Neit J. Nieves" - Payment Received, thanks!
12. Roderick Scotto - Green LCD, "Property of ; Scotto Tuning" - Payment Received, thanks!
13. Oldskul - RX8Club - Blue LCD, "Property of ; ProTuner" - Payment Received, thanks!
14. WankelBolt - RX8Club - Green LCD, "www.SpecRX7.com ; Unhook Ignition!" - Payment Received, thanks!
15. Czar - RX8Club - Blue LCD, "Property of ; Czar" - Payment Received, thanks!
16. NewbernD - RX8Club - Blue LCD, "Property of ; Dave Newbern" - Payment Received, thanks!

Updated: April 24 2009, 10:05 am

Nemesis8

iTrader: (3)

You made it! w00t w00t

alz0rz

iTrader: (41)

Good stuff.

DOMINION

Put me down for a blue lcd one! when can I send the money?

TwistedRotors

Accepting payments at this time. Make a note that you'd like a blue LCD in Paypal and what name you'd like on your personal splash screen. Thanks!
-John

risky business

some1 in jax needs to buy one.

DOMINION

I'm getting mine Thursday

Texak

Paypal sent!!! When will you be shipping them out?

TwistedRotors

Received! As soon as I have 10 payed for then I can order all the components and start putting the units together. I have already ordered the custom PCB's out of pocket as I figured those could have caused a delay. The components are coming from multiple sources, some with faster shipping than others. I hope to begin shipping 2-3 weeks after receiving the 10th payment. I wish I could give a more definite date but if anything changes I will notify everyone immediately.
-John

Texak

Damn.. might change my delivery location then. i leave town in 2 weeks. I was hoping to test the compression before i left so I could leave the car with the dealership. Nothing you can do about that though.

TwistedRotors

Sorry about that, you can email your new address to TR01@twistedrotors.com whenever you want.
-John

Sgt Fox

Could I get one that said "Are you feeling lucky?" instead of property of?

TwistedRotors

I can do that. As long as it's kept "professional" I don't mind putting it on the unit. I may be opening a can of worms with this, but I really wanted the GB testers to be special since you guys are going to be the ones that get this going for me.
So for messages I will do any message you'd like, as long as it's "appropriate"...however there are space limitations. The screen is 16x2 characters and your message must fit within that.
-John

Texak, let me know if you'd like to change your message. :-)

maskedferret

iTrader: (1)

I am very much on the fence about committing to this. I do not see myself really *needing* it so much as I am just curious about knowing what my engine would actually put out. I am rather neurotic about the health of the engine even though I have yet to have any cause for concern with the lack of issues.

Regardless, kudos to you for making this tester! Consider this my subscribing to the thread and trying to convince myself to get it!

gvang

John,
I am interested in 2 units. Do I calculate the shipping price X2 or do you have something like combined shipment?

Regards,
George

swoope

iTrader: (5)

just found this.

john you have another pm coming..

btw, could my splash screen say? please be good!

beers
scott

ASH8

PM Sent

BTW: What are the MAXIMUM Characters allowed for the 'splash screen' including spaces.

TwistedRotors

I was trying to think of something clever to say...but all I can come up with is.... "BUY ONE!!!" :-)

Hello George,
The shipping method I'm using for the International folks will not change for 2 units. I can fit them both in the same box. So for 2 units you're looking at $497 USD shipped.

Scott, sure your splash screen can say that....it's short enough to fit on one line, but would you like it split up on both lines and centered?

-John

ASH8

What about "Disconnect Crank Sensor FIRST" on Splash Screen.?

Rx7_Nut13b

PM Sent

Chuck

TwistedRotors

Good example, and it will fit!
Disconnect Crank = 16 characters, line 1
Sensor FIRST = 12 characters, line 2
-John

ASH8

Yep, I will have that thanks, in BLUE Please..

Phil's 8

iTrader: (3)

Payment sent, PM sent. You should have your minimum shortly.

czar

iTrader: (3)

ill send payment at end of work

carbonRX8

iTrader: (1)

Payment sent!