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Lightspeed crank and ignition wire routing

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rvdave

Joined: 24 Jan 2009
Posts: 191

Posted: Mon Mar 24, 2014 5:50 am Post subject: Lightspeed crank and ignition wire routing

Finishing up baffling and looking to route Lightspeed crank sensor cable and lower spark plug wire through baffling.   First is whether to go above or below engine with crank sensor and where to penetrate firewall?  I have dual so wondering about running them together.

Next how to get lower plug wire to bottom plug from coil on top of engine--maybe silicone grommet thru baffling?

_________________
Dave Ford
Cadillac, MI

carl.froehlich(at)verizon
Guest

Posted: Mon Mar 24, 2014 6:59 am Post subject: Lightspeed crank and ignition wire routing

Mount the coils for the bottom plugs behind the engine baffle on the engine

mount via adle clamps, not on top of the engine.  Mount the top plug coils

on top of the engine.  This simplifies the coil to plug wiring.



Carl



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rvdave

Joined: 24 Jan 2009
Posts: 191

Posted: Mon Mar 24, 2014 10:56 am Post subject: Re: Lightspeed crank and ignition wire routing

That may be the best way--will have to get longer HV leads if I do that though.



How about the crank sensor leads--cross over under the engine then run parallel to firewall?

_________________
Dave Ford
Cadillac, MI

hotwheels

Joined: 01 Jun 2007
Posts: 240

Posted: Mon Mar 24, 2014 11:40 am Post subject: Re: Lightspeed crank and ignition wire routing

Photos attached. I have dual LSE. RG400 coming out of top portion of firewall are high tension coil wires. The bottom coils are attached to the engine mount. The top coils are attached to the engine case. Crank sensor wires route across the co-pilot side beneath the oil returns. I used both adel clamps and RTV where required. The most important thing is to run the RG400 coil wires separate from the sensor wires.



Cheers,

Jay

433RV - flying

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rvdave

Joined: 24 Jan 2009
Posts: 191

Posted: Mon Mar 24, 2014 4:03 pm Post subject: Re: Lightspeed crank and ignition wire routing

Looks good, one other thing--how about exiting the flywheel, how specifically do you route and mount the sensor wires to get the clearance from rotating flywheel?  Do you mount an adel clamp to the sensor circuit board also?

_________________
Dave Ford
Cadillac, MI

Dick Sipp

Joined: 11 Jan 2006
Posts: 215
Location: Hope, MI

Posted: Mon Mar 24, 2014 5:12 pm Post subject: Lightspeed crank and ignition wire routing

The area where the sensor wires exit behind the flywheel has always bothered 

me.  I think I laced them together and clamped them as close to the bottom 

seam of the case as possible and then back under the cyls. in a bundle with 

some other engine sensor wiring.  No problems at 550 hours.



An unrelated observation is that the advance at cruise power is always 

within a degree or two of 25 same as the mag.  That is unless I get to power 

settings below about 60% such as above 10,000 or lower than normal manifold 

pressures.  I would really like to have two PMAGS if they would ever finish 

work on them.



Dick

RV-10, RV-4, RV-12



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hotwheels

Joined: 01 Jun 2007
Posts: 240

Posted: Tue Mar 25, 2014 6:30 am Post subject: Re: Lightspeed crank and ignition wire routing

Just tie them together and route under along the case using clamps and/or RTV. It's very secure. The part that me pucker was drilling holes in the case behind the flywheel to mount the LSE sensor. YMMV with newer LSE sensors.



Regards,

Jay

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rv10flyer

Joined: 25 Aug 2009
Posts: 364

Posted: Thu Mar 27, 2014 4:11 am Post subject: Re: Lightspeed crank and ignition wire routing

Dick,



"An unrelated observation is that the advance at cruise power is always 

within a degree or two of 25 same as the mag."



What are the advantages/disadvantages compared to my stock Slicks? With your hours it would be almost time to ovhl mags if you had them. Any problems so far with LS? Thank you or anyone else for feedback.



Wayne 128 hrs. 

10.5 gph 155-160 kt cruise

_________________
Wayne G.

rvdave

Joined: 24 Jan 2009
Posts: 191

Posted: Thu Mar 27, 2014 8:40 am Post subject: Re: Lightspeed crank and ignition wire routing

I'm at the beginning of learning curve re lightspeed but according to what I read in the manual, with mp connected timing should be around 40* and with mp disconnected should be about 25*.  Is this true for cruise configuration or will it continually be changing with altitude, rpm, throttle, etc?

_________________
Dave Ford
Cadillac, MI

Kelly McMullen

Joined: 16 Apr 2008
Posts: 1188
Location: Sun Lakes AZ

Posted: Thu Mar 27, 2014 3:10 pm Post subject: Lightspeed crank and ignition wire routing

Obviously timing has to be inversely proportional to manifold pressure. The higher the MP the closer timing must be to the nominal 25 degrees. 



 On Thu, Mar 27, 2014 at 9:40 AM, rvdave <rv610dave(at)gmail.com (rv610dave(at)gmail.com)> wrote:

 	  Quote: 	
		   --> RV10-List message posted by: "rvdave" <rv610dave(at)gmail.com (rv610dave(at)gmail.com)>

 

 I'm at the beginning of learning curve re lightspeed but according to what I read in the manual, with mp connected timing should be around 40* and with mp disconnected should be about 25*.  Is this true for cruise configuration or will it continually be changing with altitude, rpm, throttle, etc?

  

 --------

 Dave Ford

 RV6 flying

 RV10 building

 Cadillac, MI

 

 

 

 

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_________________
Kelly McMullen
A&P/IA, EAA Tech Counselor
KCHD

Dick Sipp

Joined: 11 Jan 2006
Posts: 215
Location: Hope, MI

Posted: Thu Mar 27, 2014 5:51 pm Post subject: Lightspeed crank and ignition wire routing

I believe the advantage is somewhat improved economy at lower power 

settings, perhaps easier starts, (I start on the LS which fires at TDC 

during start).

I've had no issues with the LS.  I'll have to check the manual again, I 

think the 40 degrees with the manifold pressure disconnected must only be 

set point, I never see anywhere near that in operation.



Dick



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Kelly McMullen

Joined: 16 Apr 2008
Posts: 1188
Location: Sun Lakes AZ

Posted: Thu Mar 27, 2014 7:12 pm Post subject: Lightspeed crank and ignition wire routing

How much advance you see will depend on your power setting. If you reduce power to say 50 percent while in descent, you might see 40 degrees.



 On Thu, Mar 27, 2014 at 6:50 PM, Dick & Vicki Sipp <rsipp(at)earthlink.net (rsipp(at)earthlink.net)> wrote:

[quote] --> RV10-List message posted by: "Dick & Vicki Sipp" <rsipp(at)earthlink.net (rsipp(at)earthlink.net)>

 



 I believe the advantage is somewhat improved economy at lower power settings, perhaps easier starts, (I start on the LS which fires at TDC during start).

 I've had no issues with the LS.  I'll have to check the manual again, I think the 40 degrees with the manifold pressure disconnected must only be set point, I never see anywhere near that in operation.

 

 Dick

 

 --

_________________
Kelly McMullen
A&P/IA, EAA Tech Counselor
KCHD

Dick Sipp

Joined: 11 Jan 2006
Posts: 215
Location: Hope, MI

Posted: Thu Mar 27, 2014 7:32 pm Post subject: Lightspeed crank and ignition wire routing

Thanks Kelly, I am going to pay more attention to the advance settings  which I can read in the cockpit; you have peaked my interest.  My  experience in cruise does not indicate significant advance increases.   Thatâ€™s probably a good thing.

 Dick

  

   From: Kelly McMullen (apilot2(at)gmail.com) 

 Sent: Thursday, March 27, 2014 11:11 PM

 To: rv10-list(at)matronics.com (rv10-list(at)matronics.com) 

 Subject: Re: Re: Lightspeed crank and ignition wire  routing

  



  How much advance you see will depend on your power setting. If you  reduce power to say 50 percent while in descent, you might see 40  degrees.



 



 On Thu, Mar 27, 2014 at 6:50 PM, Dick & Vicki Sipp  <rsipp(at)earthlink.net (rsipp(at)earthlink.net)> wrote:

 [quote]   --> RV10-List message posted by: "Dick & Vicki Sipp" <rsipp(at)earthlink.net (rsipp(at)earthlink.net)>

I believe the advantage    is somewhat improved economy at lower power settings, perhaps easier starts,    (I start on the LS which fires at TDC during start).

I've had no issues    with the LS.  I'll have to check the manual again, I think the 40 degrees    with the manifold pressure disconnected must only be set point, I never see    anywhere near that in operation.



Dick



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rvdave

Joined: 24 Jan 2009
Posts: 191

Posted: Fri Mar 28, 2014 3:50 am Post subject: Re: Lightspeed crank and ignition wire routing

Dick how are you reading the timing advance, do you have the Lightspeed display?

_________________
Dave Ford
Cadillac, MI

rvdave

Joined: 24 Jan 2009
Posts: 191

Posted: Fri Mar 28, 2014 3:56 am Post subject: Re: Lightspeed crank and ignition wire routing

Dick how are you reading the timing advance, do you have the Lightspeed display?

_________________
Dave Ford
Cadillac, MI

Dick Sipp

Joined: 11 Jan 2006
Posts: 215
Location: Hope, MI

Posted: Fri Mar 28, 2014 6:01 pm Post subject: Lightspeed crank and ignition wire routing

Yes, the Lightspeed display module.



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