EFI University

[furpo]

just wondering if it is possible to run a crank trigger gear down (i.e same speed as cam shaft) and have all the extra features that requires a cam trigger?

the reason i ask is because it is quite difficult to fabricate cam triggers for chain driven push rod engines. also is this is the case then it would be possible to use a pick up of the drive shaft in vehicales like our speedway cars where there is no clutch or gearbox.

roger
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don't mind me, i always need help

[Pantera EFI]

Hi Roger, I still to this date, do not have the best answere for what you asked. All the methods you stated will produce a signal. When on the crankshaft, you will get less " jitter ". This can be on the front, back, middle. Again, I am comfuzed, the closer to the " center " axis of the twisting motion is better.
The phase sensor is only to used to detect 1/2 of a 720 degree cycle. No great resolution is necessory. You could use a cam lobe, rocker arm, etc.
Lance

[Guest]

thanks lance.

mmmm. a rocker arm, or even the mechanical fuel pump lobe.

so what type of sensor would measure this?

roger

[Pantera EFI]

Hi Roger, the Hall sensor would be my first choice. The Chev LS-1 uses this type of sensor. My system will interface with the stock cam or crank GM sensor.
Lance

[Pantera EFI]

Roger, I came across your interest in a CAS and target.

When you asked, we were having a problem with "ghosting" of
that (48-x) target.

This was solved by a 100% "filled in" tooth target and the correct
high speed Hall sensor.

A good sync at 38 RPM (76 crank RPM) occures on a drill motor driven target.

Quaint drive method, though it copies an uneven turning camshaft.

Engine testing has been done for two years.

Now, for those who require that application, a solution provides
for ONE sensor ONLY to complete a fully sequential engine decode.

Lance