Bosch coil dwell

Includes MoTeC CDIs, Ignition Expanders

Bosch coil dwell

Postby GWRMOTORSPORT on Thu Oct 13, 2022 8:32 am

Hi All

would anybody have dwell table for a Bosch coil part number 0 221 503 017

Many Thanks

Steve

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Re: Bosch coil dwell

Postby David Ferguson on Thu Oct 13, 2022 9:35 am

There was a similar 3x2 coil pack in an old Bosch Motorsport catalog (page 81). It has a dwell table included. I would be temped to start there and confirm with current measurements using an oscilloscope.

https://www.bosch-motorsport.com/media/ ... g_2010.pdf
David Ferguson
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Re: Bosch coil dwell

Postby GWRMOTORSPORT on Thu Oct 13, 2022 7:32 pm

Hi David
thanks for the reply, yes I had entered those numbers from the old catalogue, presuming Bosch
had just changed the connector from the minitmer to the compact style but kept the internals the same.
I would normally test coils myself, power supply, current clamp, scope etc but off work at the moment so thought I.d use the forum, apprieciate the reply and help. 2 of these are being used a twin plug headed old E type Jaguar engine,
something a bit different for a change.
I did wonder whether to fire boths plugs per cylinder together or try firing them a few degrees apart, also which one to fire first?
Any body got any thoughts or experience I would be interested to share
I'll try and post something in projects once were up and running
Thanks again

Steve

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