[Diy_efi] OT TCI Ignition

[Torbjörn Forsman]

A common problem with CDI systems is that the spark duration is too 
short to reliably ignite a lean fuel mixture. They will also cause more 
electrical interference emissions (disturbing radio reception and other 
electronics in the vehicle) than an inductive ignition system.
The fine thing with CDI is that it is more tolerant to fouled plugs than 
an inductive system, due to the faster rise of the ignition voltage and 
the lower internal resistance. But fouled plugs are not a problem on 
four-stroke engines today.
There are good reasons why CDI is commercially used on lots of small 
two-stroke engines (chain saws, snowmobiles etc) but very seldom on 
passenger cars.

Best regards

Torbj?rn Forsman

S. K Rahman wrote:
> Hello all,
> 
> Slight OT question.
> I was wondering using a TCI ignition would be better than a CDI?
> I am in process of converting an Vacuum advance based Points system in
> a distributor less ignition so I was wondering should I stick to CDI
> or TCI?
> 
> I am looking towards more fuel efficiency. Thanks
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