RegisterSearchFAQMemberlistUsergroupsLog in
Reply to topic Page 1 of 1
Just got a MJLJ V3.2, Q: Can I use external rev limiter?
Author Message
Reply with quote
Post Just got a MJLJ V3.2, Q: Can I use external rev limiter? 
Hi all,

Just bought a MJLJ V3.2 which has not got the add-on hard rev limiter.

I have an Armtech/Omex rev limiter module 15RL02 for a single coil dizzy set-up I have been using on my Peugeot 205 GTI 1.9 8v. I'm sure you are aware of this but it intercepts signals on the +ve and -ve side of the coil along with an earth connection.

Can this be used in the same way with a Ford coilpack or will I need a twin coil version (MJLJ installation guide describes there being coil A and coil B)

Thanks and sorry if this has been covered before,

Matt

View user's profile Send private message Send e-mail Visit poster's website MSN Messenger
Reply with quote
Post  
Hi,

That would depend on how the hard rev limiter is activated. Can you post any technical documentation on that hard rev limiter?

For comparison- the MJLJ hard rev limiter is activated by an active 'ground' from the trigger.


_________________
Brent Picasso
Founder, Autosport Labs
Facebook | Twitter
View user's profile Send private message Send e-mail
Reply with quote
Post  
Hi Brent,

" The system works on all negative earth contact breaker ignition systems, opto breaker systems and most transistorised and ECU controlled ignition systems." (Armtech.co.uk)

There are 3 wires coming from the limiter;
GREEN: To a good earth point near the coil
RED: To coil positive (or, if this is not available, to any positive feed that is switched by the ignition).
BLACK: To the coil negative

Once wired up you start the engine, hold down a button on the side of the limiter, bring the engine up to half your desired maximum revs and release the button. The unit doubles the rev figure and stores it not allowing the engine to rev beyond that. To be accurate I was going to use the 4 user outputs and the shift light on the MJLJ to all run LEDS so I can be sure when I'm at 3500rpm (max I want is 7krpm).

Matt

View user's profile Send private message Send e-mail Visit poster's website MSN Messenger
Reply with quote
Post  
It looks like it would run independently from the MJLJ, as it has it's own RPM calculation circuit built in.

In a coil pack scenario, it would only see 1/2 of the RPM if you used the sense wire on only one of the coil pack trigger wires, unless you used the 'diode' tachometer trick outlined in our installation guide.

Other than that it should wire up just fine.


_________________
Brent Picasso
Founder, Autosport Labs
Facebook | Twitter
View user's profile Send private message Send e-mail
Display posts from previous:
Reply to topic Page 1 of 1
You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum
You cannot attach files in this forum
You cannot download files in this forum