Search found 29 matches

by alhbln
Fri Dec 21, 2012 7:11 pm
Forum: Installation
Topic: Tacho conversion for Megajolt setups
Replies: 1
Views: 3190

Tacho conversion for Megajolt setups

I've deprecated the old attiny based tacho conversion project and created a new one based on standard components. Should be as simple to build as the original one but does not require a programmer or software anymore. The conversion allows you to not only run your original tacho with a megajolt setu...
by alhbln
Tue Oct 02, 2012 8:05 am
Forum: Operation
Topic: Erraneous tach output in a high rev engine load condition?
Replies: 2
Views: 3571

So it could be an RPM limitation of Johns EDIS8 module which could lead to the tach output issues we see? Not sure how the tach signal is generated in the MJs firmware but when the PIP input signal gets corrupted then the tach signal will probably also miss out.
by alhbln
Sun Sep 30, 2012 9:04 pm
Forum: Operation
Topic: Erraneous tach output in a high rev engine load condition?
Replies: 2
Views: 3571

Erraneous tach output in a high rev engine load condition?

Hi, Ferraripilot is using a new tach pcb i designed for conversions of Veglia and Smiths RCV/RCI tachs to run with the Megajolts digital tach output, and he encountered needle bouncing around 6500rpm but only when the engine is under load. My tach circuit cleans up and stabilize the input signal so ...
by alhbln
Mon Aug 30, 2010 1:47 pm
Forum: News and Announcements
Topic: Megajolt T-shirt design contest!
Replies: 56
Views: 56629

Congrats to dr. occa, the design is really nice, well earned victory!
by alhbln
Wed Jul 21, 2010 9:04 am
Forum: News and Announcements
Topic: Megajolt T-shirt design contest!
Replies: 56
Views: 56629

My favourite one is the great Ford quote and the missing tooth, hilarious :)
Here are some more, got a bit carried away in the process though.
by alhbln
Sun Jun 13, 2010 5:19 pm
Forum: Operation
Topic: A simple Megajolt "diag light" indicator
Replies: 7
Views: 4881

Correct, if you wire the tach via the MJ tach output, no tach activity is a good indicator that you are probably in limp mode.
by alhbln
Thu Jun 10, 2010 5:43 am
Forum: Operation
Topic: A simple Megajolt "diag light" indicator
Replies: 7
Views: 4881

My Megajolt installation has been finished last week, and the 240Z started at once on the very first test - nice product, thanks Brent! :) I had no time to post an installation report yet but will do as soon as i have visited the rolling road. When running the car with the Megajolt disconnected to f...
by alhbln
Thu Jun 03, 2010 2:37 pm
Forum: Operation
Topic: Aux input (voltage to input) Megajolt v4 jr
Replies: 14
Views: 10623

Re: Voltage Divider

That will work. But then there is still the problem of generating a calibration chart for the original gauge-sensor combination, how do you do that? Also, 12V to the gauge varies a lot from say, idle with lights on, to full speed no load. That voltage variation will cause the MJLJ gauge to change e...
by alhbln
Thu Jun 03, 2010 6:50 am
Forum: Operation
Topic: Aux input (voltage to input) Megajolt v4 jr
Replies: 14
Views: 10623

Re: Temp Sensor

That would NOT be OK, for a couple of reasons. The 2.2K resistor in the MKLJ would throw off your present circuit. Even if the 2.2K were disconnected, it is likely your present circuit sometimes exceeds 5 volts at the sensor. The MJLJ can't be calibrated outside of 0 to 5 volts. But connecting a se...
by alhbln
Tue May 04, 2010 5:52 am
Forum: Installation
Topic: Spark plug wiring for a Rover V8
Replies: 11
Views: 14562

by alhbln
Sun Apr 04, 2010 3:39 pm
Forum: Operation
Topic: BATTERY CURRENT FOR EDIS
Replies: 3
Views: 3191

Do you want to measure the average or peak current? 220 mA sounds quite low for 1000 RPM, i would have expected at least 1-2A. Have you measured the current with a digital multimeter or a scope with a current clamp? The coil's primary current spikes are quite fast (1-4 ms, depending on dwell with an...
by alhbln
Fri Apr 02, 2010 3:00 pm
Forum: Installation
Topic: Trigger Wheel, shrink fit vs. bolting/welding?
Replies: 5
Views: 5848

Good morning,

will do, should be easy to add.

Thanks,
Adrian
by alhbln
Fri Apr 02, 2010 8:06 am
Forum: Installation
Topic: Trigger Wheel, shrink fit vs. bolting/welding?
Replies: 5
Views: 5848

Trigger Wheel, shrink fit vs. bolting/welding?

After talking to my machine workshop i opted to shrink fit the trigger wheel, as the guy there assured me that a shrink fit is quite robust, as it can even be used to fit gears on a shaft. The trigger wheel was machined on a late so that the inner diameter is 1/10 mm smaller than the (machined) oute...
by alhbln
Fri Apr 02, 2010 5:50 am
Forum: Installation
Topic: Datsun 240Z Wiring Diagram
Replies: 4
Views: 12072

Sure, you are welcome! I am using Omnigraffle Pro for such charts, its Mac OSX only though.
Let me know what you need and i can make changes and adaptions if you don't have a Mac.
by alhbln
Thu Apr 01, 2010 7:34 am
Forum: Installation
Topic: Datsun 240Z Wiring Diagram
Replies: 4
Views: 12072

Datsun 240Z Wiring Diagram

Here is the initial wiring diagram which i did for the documentation of my 240Z conversion to Megajolt. I thought it might be helpful to post it here before i finish the full documentation.