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-   -   Using Timing Light on Twin Plug Engine? (http://forums.pelicanparts.com/porsche-911-technical-forum/924186-using-timing-light-twin-plug-engine.html)

73ess 08-04-2016 08:10 AM

Using Timing Light on Twin Plug Engine?
 
I need to check the timing on a twin plug 3.0 engine. Do I just connect it to number 1 spark plug cable as I would for a stock single plug engine? Can I use my timing advance knob on the timing light or will the readings be off for a twin plug engine?

Steve@Rennsport 08-04-2016 09:28 AM

Use #1 plug just like on a single-ignition engine.

Time the car just like you would with your dial-back timing light, but bear in mind the differences in timing values. :) :)

73ess 08-04-2016 09:30 AM

Quote:

Originally Posted by Steve@Rennsport (Post 9227038)
Use #1 plug just like on a single-ignition engine.

Time the car just like you would with your dial-back timing light, but bear in mind the differences in timing values. :) :)



Thanks Steve. What do you mean by "differences in timing values"?

T77911S 08-04-2016 10:37 AM

less advance is needed with dual plug

rsscotty 08-04-2016 10:39 AM

I think what Steve is referring to is that you don't use the single plug timing numbers on a twin plug engine.

boyt911sc 08-04-2016 11:05 AM

Could you elaborate.........
 
Quote:

Originally Posted by Steve@Rennsport (Post 9227038)
Use #1 plug just like on a single-ignition engine.

Time the car just like you would with your dial-back timing light, but bear in mind the differences in timing values. :) :)



Steve,

Could you elaborate more on this subject? Thanks.

Tony

911SauCy 08-04-2016 12:46 PM

IIRC, A single plug 3.0 engine idles 5deg before TDC and advances to 25 deg at 6000rpm.

Because a twin plug is more efficient at burning the fuel charge there will be less timing advance required to get the power out of it.

I just don't personally know what the numbers are.

Someone chime in with those deets!?

73ess 08-04-2016 07:45 PM

Quote:

Originally Posted by 911SauCy (Post 9227278)
IIRC, A single plug 3.0 engine idles 5deg before TDC and advances to 25 deg at 6000rpm.

Because a twin plug is more efficient at burning the fuel charge there will be less timing advance required to get the power out of it.

I just don't personally know what the numbers are.

Someone chime in with those deets!?



Yes. Would be great to know the timing numbers for a twin plug 3.0.


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