D.i.y. Digital Compression Tester For Rotarys
07-31-2005, 10:16 AM
#1
Senior Member
Thread Starter
Join Date: Jul 2004
Location: Vero Beach, Florida
Posts: 674
Digital Compression Tester
Courtesy of "COsborne"
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This tester is great if you're by yourself and don't have someone to turn the key for you or you want to log your compression at certain intervals.
Things you'll need:
1. Data acquisition unit
available from www.dataq.com
P/N: DI-194RS
$24.95 plus tax & shipping; total $30.02
2. Pressure transducer
available fromwww.grainger.com
P/N: 1X742 @ $103.05 plus tax & shipping; total $117.04
3. Misc.
avaliable from Radio Shack
16-gauge 2-conductor wire with one red and one black jacket, battery clips, fuse holder & fuse, and shrink tubing assortment for about $30 +/-
4. Flex hose with connector from previous compression tester – free
--------------------------------------------------------
Still havin troubles coming up on a part for it but it does work and work well at that!
Courtesy of "COsborne"
--------------------------------------------------------------------------------
This tester is great if you're by yourself and don't have someone to turn the key for you or you want to log your compression at certain intervals.
Things you'll need:
1. Data acquisition unit
available from www.dataq.com
P/N: DI-194RS
$24.95 plus tax & shipping; total $30.02
2. Pressure transducer
available fromwww.grainger.com
P/N: 1X742 @ $103.05 plus tax & shipping; total $117.04
3. Misc.
avaliable from Radio Shack
16-gauge 2-conductor wire with one red and one black jacket, battery clips, fuse holder & fuse, and shrink tubing assortment for about $30 +/-
4. Flex hose with connector from previous compression tester – free
--------------------------------------------------------
Still havin troubles coming up on a part for it but it does work and work well at that!
08-02-2005, 08:11 PM
#4
Senior Member
Join Date: Jan 2003
Posts: 117
i just happened to bump into this thread and may be able to be of help.
i log exhaust manifold pressure, that'd be between the exhaust port and the turbo of course.
i use a honeywell pressure sensor 0 to 5 volts. they are available 0 to 100 or 0 to 150 psi. i would think that it would be easy to rig it up to the spark plug boss and datalog it.
honeywell pressure sensor monolithic signal conditioned 4000PC series. i don't have the url but it should be easy to find. i bought the 2 i use for $40 on ebay so they probably are not expensive.
maybe i will rig one up........
howard coleman
i log exhaust manifold pressure, that'd be between the exhaust port and the turbo of course.
i use a honeywell pressure sensor 0 to 5 volts. they are available 0 to 100 or 0 to 150 psi. i would think that it would be easy to rig it up to the spark plug boss and datalog it.
honeywell pressure sensor monolithic signal conditioned 4000PC series. i don't have the url but it should be easy to find. i bought the 2 i use for $40 on ebay so they probably are not expensive.
maybe i will rig one up........
howard coleman
08-05-2005, 06:42 PM
#6
Senior Member
Join Date: Feb 2003
Location: Rainy Seattle
Posts: 452
Man, you guys are way behind the times. 
I did this a year ago. It's freakin' handy as Hell.
Seriously though, I'm really glad to see more people doing it. The damn pressure sensor is usually the stumbling block since I've never seen one for less than a Franklin.
Hey what do you think of this test? It was the rear chamber of a 12A with a major water seal failure.
I'm especially curious to hear what people have to say about the little hitch on each upslope.
Cheers
Seriously though, I'm really glad to see more people doing it. The damn pressure sensor is usually the stumbling block since I've never seen one for less than a Franklin.
Hey what do you think of this test? It was the rear chamber of a 12A with a major water seal failure.
I'm especially curious to hear what people have to say about the little hitch on each upslope.
Cheers