Search found 42 matches

by Alexander_Monday
Fri Feb 20, 2009 2:41 am
Forum: Installation
Topic: VR signal from pulley modified with holes for trigger
Replies: 28
Views: 30741

Actually I used an 18V cordless drill! :D I took my time, made a jig ( out of spare stuff I had laying around ) to hold the pulley and the bit at the same time. I rotated the pulley in the jig between each drill and clamped it back down. I drilled the holes so that the width of the holes was the sam...
by Alexander_Monday
Tue Feb 17, 2009 1:12 pm
Forum: Installation
Topic: VR signal from pulley modified with holes for trigger
Replies: 28
Views: 30741

Occasionally one of my hair-brained ideas works. :D (A blind squirrel occasionally finds a nut)

Glad you took the chance to try something out of the box and were successful.
by Alexander_Monday
Sun Jan 04, 2009 5:51 pm
Forum: RaceCapture/Pro General Q&A
Topic: Introduction to RaceCapture
Replies: 44
Views: 69423

Ditto on the price? Precision of analog inputs? Analog input range? Will the analog inputs be scalable against an external Vref? Will the analog inputs be high impedance, or will they be pulled up, or selectable? By the looks of it, the analog inputs will be single ended only and not differential? C...
by Alexander_Monday
Mon Dec 22, 2008 3:37 pm
Forum: Installation
Topic: VR signal from pulley modified with holes for trigger
Replies: 28
Views: 30741

Just thought I would post an installed picture.
Ignore the timing marks, they are off 130 degrees now due to the new keyway I made to relocate the sensor.
by Alexander_Monday
Wed Dec 17, 2008 2:36 pm
Forum: Ignition Map Library
Topic: Corvair Corsa 180 HP Turbo
Replies: 8
Views: 14924

Miniman: Since you came from CA, I just had to say welcome to winter. :shock:
by Alexander_Monday
Thu Dec 11, 2008 1:03 pm
Forum: Future Upgrades
Topic: MJLJ V4 + Knock sensor = possible good idea
Replies: 30
Views: 74003

Not really. It's not intended to be a fully 'closed loop control' system like how Saab does their engine management. Brent, Interesting, does Saab have a way to control the ignition just by working engine variables, or is it still based on a default map for the particular engine? If they do, I woul...
by Alexander_Monday
Wed Dec 10, 2008 10:47 pm
Forum: Future Upgrades
Topic: MJLJ V4 + Knock sensor = possible good idea
Replies: 30
Views: 74003

Brent is correct. You can over advance to a point of less efficiency and or power without necessarily having knock.
by Alexander_Monday
Tue Dec 09, 2008 6:36 pm
Forum: Future Upgrades
Topic: MJLJ V4 + Knock sensor = possible good idea
Replies: 30
Views: 74003

Alexander_Monday wrote:... you need some method of continuing to raising the AUX input as long as knock is detected, and lowering it when not, both at a controlled rate.
If I am reading your idea correctly it would achieve exactly that.
by Alexander_Monday
Tue Dec 09, 2008 6:25 pm
Forum: Installation
Topic: VR signal from pulley modified with holes for trigger
Replies: 28
Views: 30741

Thank you, however to be truthful my motivation was necessity.
I have a trigger wheel from a ford, but thinking about trying to adapt it to this kind of pulley made my head hurt. :D
by Alexander_Monday
Tue Dec 09, 2008 2:38 pm
Forum: Q&A
Topic: ignition curve,why the need to alter it?
Replies: 10
Views: 10341

I don't know what your ignition was before the change, however if it was distributor based, any slop in the distributor drive, gears, shaft, etc. will cause scatter. Scatter is where the ignition timing varies (or scatters) when it is not supposed to. I found that the rock solid timing from EDIS gav...
by Alexander_Monday
Tue Dec 09, 2008 2:10 pm
Forum: Installation
Topic: VR signal from pulley modified with holes for trigger
Replies: 28
Views: 30741

Assuming Type 1 VW ( and I would guess Type 3, but don't own one ) TDC should be 90 degrees clockwise from the woodruff key. I can't tell exactly because the picture is at an angle, however it appears correct. Yes, the holes should be on the 5 degree lines to make the "teeth" on 10 degree ...
by Alexander_Monday
Mon Dec 08, 2008 12:53 pm
Forum: Q&A
Topic: Coms lead problems
Replies: 4
Views: 4553

Also, some usb to serial adapters will select the next available com port when you plug it in, so depending on other external adapters like blue tooth, etc. it is possible that it can change when you insert it the next time. Just something to think about after you get it working, and then one day it...
by Alexander_Monday
Mon Dec 08, 2008 12:41 pm
Forum: Q&A
Topic: MegaJolt and MPH
Replies: 12
Views: 10929

Yes, a crowbar of some sort would be better than a zener, but the zener is quick and easy protection, and I am interfacing with a thermocouple multiplexer I built that in normal operating range should never peak above 4V, and I had a 4.7V zener laying around, so--- :D
by Alexander_Monday
Sat Dec 06, 2008 6:57 pm
Forum: Q&A
Topic: MegaJolt and MPH
Replies: 12
Views: 10929

If you are an electronics experimenter and can adapt and build from datasheets, I have used the TC9400 for this type of application before. It is a very stable and accurate frequency to voltage or voltage to frequency chip and is cheap. Make sure you filter the output good, because is does have a sa...
by Alexander_Monday
Fri Nov 14, 2008 10:45 pm
Forum: Q&A
Topic: Map sensor per port
Replies: 9
Views: 8197

I'm not sure that what you are trying to achieve here would outweigh the complexity. If you are worried about idle or transition, maybe I am the exception, but I am running a 2110cc 4 cylinder with 44MM intake valves, 37.5MM exhaust valves, very large ports, dual Weber carbs and a very aggressive ca...