SDS CPI Tricks and Tips - Page 8

gmcjetpilot · #71 11-15-2018, 12:47 AM

I was reading the SDS CDI installation manual.

Be sure to remove any parts which are not positively held in place once the mags are removed. If these come loose inside the engine, severe damage or complete engine failure could result! If you’re installing a single coil pack, remove the right magneto and any gears or bearings which rely on the magneto to hold them in place

&

When replacing both mags, you need to again remove any gears, drive couplings or bearings which are normally held in place by the mag. Lycomings may be fitted with various different mag drives and parts so you need to understand what to remove.

I have a O-360-A1A (180HP). Besides removing magneto and gear/coupler (attached to Mag), installing cover, what else do I need to do? Can anyone explain.

Accessory drive has crank shaft gear, cam gear, two idlers. These drive two mags, one prop gov and vacuum pump. Oil pump is direct drive off of crank. I assume the accessory drive gears don't rely on the magnetos to be present for the Lycoming engine's. Just checking... the instructions scared me...

rv6ejguy · #72 11-15-2018, 05:39 AM

Nothing extra to remove on 4 cyl Lycs. On 6 cylinder Lycs, we have a diagram showing which parts need to be removed but they all come out through the mag holes.

N13BN · #73 12-13-2018, 10:58 PM

I have an O-235 which uses the smaller SAE-1 prophub. I am having trouble finding the larger flywheel with that bolt pattern. Would it be possible to use the SDS automotive sensor with the smaller flywheel?

Bill Newkirk

rv6ejguy · #74 12-14-2018, 05:53 AM

We had a customer with a 320 and small flywheel make his own mount on the left side of the engine and install the magnets in the fore/aft plane. You'd have to find your own positioning by scribing a circle on the flywheel face and machine a new mount. I could send you photos of what he did.

N13BN · #75 12-14-2018, 09:42 AM

Ross, a picture or two would be great. Once I get the flywheel figured out, the next thing will be to decide on whether to get a single or double system.

Toobuilder · #76 12-14-2018, 10:55 AM

Quote:

Originally Posted by Toobuilder

CPI/Mag combo's work just fine. Slight difference in LOP timing to compensate for the retarded timing of the magneto, but thats about it.

I will emphasize again that you buy the dual hall sensor on the first go, even if you dont think you are going to add a second system down the line. Its only a few extra bucks and makes it SIGNIFICANTLY easier to add a second system if you change your mind.

From post #19

rv6ejguy · #77 12-14-2018, 01:12 PM

Here are some photos of what the other guy did:

8-32 Allen set screws go into threaded holes here, magnets go in from aft side to face the red Hall sensor

Mike S · #78 12-14-2018, 01:41 PM

Y'all think that mount is stout enough?

rv6ejguy · #79 12-14-2018, 07:19 PM

Quote:

Originally Posted by Mike S

Y'all think that mount is stout enough?

I do believe so. Not much chance of harmonics there...

onebounce · #80 07-29-2020, 05:10 AM

Hi - we are looking at a single CPI-2 install for our IO540 and would prefer to have the contoller mounted out of (normal) sight, either integrated into the iPad mount (behind the iPad) or in a flip down mount under the panel. Reason being don't expect to be accessing it during normal flight, only during set up and fault finding.

Anybody know if the CPI-2 supports the use of a remote LOP switch ?

Many thanks

Andy