i have a bit of a dilema, as my spool for my drag car does not have a spot for the stock vss gear. leaving me with no speedo.

now, here is my idea...... use a "single pole" hall sensor, with a magnet or multiple magnets, located on my halfshaft.. in order to generate a signal to provide the aem with an accurate vehicle speed.

i plan on using one of these, drill it from the back side, slide the magnet down in, epoxy the hole shut, then clamp to the axle. the hall sensor will be located off the back of the block someplace with some sort of bracket.


before you sugest use the abs ring. we are not running stock spindles/axles.... we are running nitrodriveline

will it work ?




Modified by dturbocivic at 5:54 PM 12/5/2006

 

Y not ? hahahahaha
probly easier to use a wheel speed sensor though, dont ya think?

 

what kind of hubs do you have on the car?

edit; spindle?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by miller &raquo;</TD></TR><TR><TD CLASS="quote">what kind of hubs do you have on the car?

edit; spindle?</TD></TR></TABLE>


updated 1st post.

we are running the nitrodriveline.

 

yes it would work, but why not use an ABS sensor or something easier?

 

what makes it easier ? how is my idea not simple ?


im all ears for any other idea's.

 

sounds very simple to me. We use that same type setup for cruise controls.

 

the AEM has no problem with a hall sensor for vss input ?

 

your idea is fine and will work as long as the aem has some sort of way to calibrate your trigger. You will need to see how many times you trigger the sensor for each rotation of the wheel.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Enzo-Racing &raquo;</TD></TR><TR><TD CLASS="quote">your idea is fine and will work as long as the aem has some sort of way to calibrate your trigger. You will need to see how many times you trigger the sensor for each rotation of the wheel.

</TD></TR></TABLE>

so you are saying i might need to have more than 1 magnet, so the hall sensor, provides a signal the aem can "inturprate"

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Enzo-Racing &raquo;</TD></TR><TR><TD CLASS="quote">your idea is fine and will work as long as the aem has some sort of way to calibrate your trigger. You will need to see how many times you trigger the sensor for each rotation of the wheel.

</TD></TR></TABLE>

Now if he was going to use a single mag,, would he be able to see it time based (inbetween Triggering) and set it up like that?? rather than multiple magnets, wait i guess that would be way too coarse

 

I hope the aem can use it. The factory sensor is a hall.

You can use one magnet or multiple doesn't matter. It's depends on how configurable the aem is. I don't use aem so i wouldn't be able to help you there.

 

guess ill be callin the tech line,

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by dturbocivic &raquo;</TD></TR><TR><TD CLASS="quote">guess ill be callin the tech line, </TD></TR></TABLE>

talk to Mitch

 

put it on the outside. drill the hole slightly undersized so its an interference fit. i did this on my hall sensor install. Also...if you can put it on the side... it'll work a bit better so that the rotational force doesnt wing it.

 

the hall sensor should pick up the magnet in the bracket reguardless right? i was talking to a pretty knowledgeable guy yesterday that uses a similar type setup, and has had no problems..

the reason for drilling in through the backside, is so the magnet doesnt get "wung" out. the part that isnt drilled acts as a stop, then the epoxy holds it in place.

 

just talked to AEM DEVIN, and also the AEM electronics dept.

both which were very helpful and answered all my questions

thanks guys to AEM

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by dturbocivic &raquo;</TD></TR><TR><TD CLASS="quote">just talked to AEM DEVIN, and also the AEM electronics dept.

both which were very helpful and answered all my questions

thanks guys to AEM </TD></TR></TABLE>


And the verdict is?????

 

its going to work

 

I just had to have about 1-1.5mm clearance between the sensor and the magnet. It was for my SDS EMS. post pics when you finish it!

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Eric@HorsepowerFreaks &raquo;</TD></TR><TR><TD CLASS="quote">I just had to have about 1-1.5mm clearance between the sensor and the magnet. It was for my SDS EMS. post pics when you finish it! </TD></TR></TABLE>


the air gap depends on which sensor i end up going with correct?

im currently looking for a hall sensor with a flange mount, so i can hang it off the back of the block aiming downward toward the "magnet" .

this is just a "tenative idea" i have in my head.. ill have to put the halfshaft on the engine, and see what kind of space i have to work around... i dont want this sensor to get screwed up if im down there ripping the trans out at the track.

there are soooooooooo many available sensors..im actually lost looking at all these things.

i will post pics. not sure how long its going to take us to get this thing all setup and working. we are going to do this for my car, as well as Steve's car(which runs an accel dfi gen7)

 

Is there anyways to machine the spool to put a stock gear back on it?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Suprdave &raquo;</TD></TR><TR><TD CLASS="quote">Is there anyways to machine the spool to put a stock gear back on it? </TD></TR></TABLE>

i guess you could machine a piece to fit onto the spool, which you can fit your stock speedo onto. but for the speedo fitting the spool as is.... the spool is turned down to far.

 

put a few magnets on it and then connect it to your drivetrain.

 

i would put it as close to the diff as possible and mount your hall effect sensor right off the trans case. Depends on what magnet you use yes. You see what I mean tho? put the magnet on the "face" of the clamp.