I'm building a car at the mo which will be running an RB26DETT engine, using a DTA S80 ecu.
Anybody know if its a good idea to try and use the cam sensor as the only system trigger, bearing in mind its coil on plug ignition, or whether the
crank position resolution would be too poor?
I know the early emerald (and other) systems used a dizzy based trigger, so again only one trigger pulse per 2 crank revs, but its all a bit old hat
now!
Other option is a crank trigger wheel, but that would really end up on the front pulley, which is rubber damped, so would probably give slightly
wandery trigger points? (prob no worse than none for 2 crank revs though I guess!)
Really thinking out loud on here, any ideas??
The cam angle sensor in the RB is cack enough as it is - I seem to remember them fluctuating at 8k RPM totally out of sync with the crank. Not sure
whether this is something to do with timing belt flapping or just because the sensors are such low resolution..
You'll need a trigger wheel.
You can mount it to the solid nose of the crank, i.e. not the rubber damped pulley. I believe on the RB26's you can even do this mounting the
trigger wheel behind the pulley so as not to affect belt changing etc. You only need a small billet bracket for the hall sensor as far as I recall.
Not difficult by any means, just make sure to have the crank balanced after you mount the trigger wheel to it!
engine's not coming apart so crank balance will be staying as-is, though I doubt a well-made trigger wheel will make much difference.
Will whip the front pulley off and see what's what on Monday
Reet, just had advice from DTA agent which pointed out that they have run these engines plenty of times on S series ecu's, and they even have a
pre-programmed setup to use the stock Nissan sensor, which they have had no issues with.
It appears I should have read the S series manual that's sat on my desk......its all in there!!
DOH
quote:
Originally posted by NS Dev
Reet,
