JanspeedZ

I am agree with you.... (Powerdyn have 3 models: Powerdyn, powerdyn OBD which use the OBD plug of the car to read rpm, and motor power analyzer who could be link to battery or cigar lighter) Megasquirt is not interesting for a shop because too open for every one...this is the right reason perhaps Yes if i would to convert it would be economical and open to progress after for a total update Could we use the original relay of the car ? or must we use the powerdyn relay board? Yes Change the dumper pulley and ad a trigger wheel is the more accuracy method as the distributor could jump and vary because of the driver shaft

No no; is it possible, powerdyn use this method ! In reality the rpm are in the current deliver by the alternator and with the electronics you could extract with accuracy the engine rpm... http://www.powerdyn.fr/English/Powerdyn_me.html

My project with megasquirt is to change the calculator but keep all the original sensor and actuator except the AFM and the TPS (upgrade to a better one, or a 240SX body...) First i will be very happy if i could do that and have a good benefice AFter if all is ok, i will convert to an upgrade Ignition piloted by the megasquirt calculator

The rpm for the dyno was take on the battery! not on the plug wire The guy say that he works with several made, but same are not so accurate than the other because of there internal components! Is critical about megasquirt is that when he works to find the better data chart for the fuel times or ignition the rpm values moves and jump, for him the reason is the system that not convert correctly or not enough speedy the rpm signal deliver by the rpm sensor...

Talking with the mechanics at the dyno shop about megasquirt, he tell me that he don't like this system, he had experienced it several times but he say that the megasquirt computer was not accurate about the RPM information He had see several time 300 rpm variation in the rpm information! Someone had ever hear the same thing? about megasquirt?

So in the search for more power but without lose drive-ability i am interested in megasquirt possibility First here is my base project! The car have only 92000 kms THe engine is F54 with N42 head, no EGR or AC the only modifications was JR direct filter, cranes cams coil, and taylors wires , sport muffler and double output Here is the result: Good just below the origin, normal for the kms... and here is also the lambda result, normal tune for economy...