12v delay relay - sc14

[old_mr2]

Hi Guys,

I am trying to stop my supercharger from disengaging between gear shifts.

Is it as simple as whacking one of these units in line with the 12v line going to the blower?

Any tips?

http://www.ebay.com/itm/DC-12V-5A-H3...item1c2811c907

[river]

Hi,

Make your own delay timer with a 555 timer chip and a relay.

seeyuzz
river

[knightrous]

Your running an Adaptronic right? Why not just setup the switch parameters in that?

[Duk]

Your running an Adaptronic right? Why not just setup the switch parameters in that?

I've got an Adaptronic and I have no idea how I would set up a delay. How would you set 1 up?
I'd just use a pre built delay like what old posted the ebay link for.

[old_mr2]

Hi Knightrous,

You can do it through the adaptronic, but it uses up most of the aux outputs in one go. I wish to use these for other uses. A relay would work better for me.

River, thanks mate, I will look into it.

Here is a recent email from Andy at Adaptronic



How about if we enable the SC when we're above 1500 RPM and > 80 kPa, but then, we only disable the SC when we get back below 1500 RPM, even if the MAP goes back to full vacuum? It can be done with a bunch of the outputs, I've done it here to show you (it ends up on aux 4).

Thanks
Andy

Considering it costs nothing to try, I will givit a go and see how it performs. I will report back.

[TERRA Operative]

You can whip something up from a few discreets from Jaycar.

http://www.bowdenshobbycircuits.info...tm#relay_i.gif

[Hen]

http://forums.toymods.org.au/index.p..._view=&start=0

If know which end of a soldering iron to hold.

[old_mr2]

Thanks Guys, looks like im off to Jaycar.

[mullett]

I did a similar thing, only used two outputs, for the SC14/GZE with an EMS (crude as hell)

Was done like this:

Aux 1) switched on at >80kPa
Aux 2) switched on at >3000rpm

Both outputs were paired together and running the SC relay, end result is that it's always on over 3000rpm (so off for cruising below 100), and instantly triggers at WOT, and the SC clutch never has to engage at high speed, so reduces the shock load dramatically. Also prevents any silly behaviour in corners (if you're doing less than 3000rpm, you're not trying hard enough to care anyway )

[Duk]

I did a similar thing, only used two outputs, for the SC14/GZE with an EMS (crude as hell)

Was done like this:

Aux 1) switched on at >80kPa
Aux 2) switched on at >3000rpm

Both outputs were paired together and running the SC relay, end result is that it's always on over 3000rpm (so off for cruising below 100), and instantly triggers at WOT, and the SC clutch never has to engage at high speed, so reduces the shock load dramatically. Also prevents any silly behaviour in corners (if you're doing less than 3000rpm, you're not trying hard enough to care anyway )

Why would you make your switch on point RPM dependent??? You've totally missed the benefit of having positive displacement supercharging (BOOST at any RPM point!)!
My switch on point in my AW11 is TPS AND manifold vacuum based. That way it comes on at any engine speed when requested, but stays off during light throttle cruising. It can come on in 1st gear driving away from a standing start, but is off when cruising down the highway.

[knightrous]

On the MegaSquirt you can set 2+ conditions per output.
Currently have my VVT enabled to turn on at >3000RPM and CLT >= 80'c

Sounds like the adaptronic software needs to updated into modern times

[river]

Hi,

Sounds like the adaptronic software needs to updated into modern times

Yeah... it's called Autronics.

seeyuzz
river

[old_mr2]

haha you chumps. I knew this was coming.

[maccac__1590]

Hi,

Make your own delay timer with a 555 timer chip and a relay.

seeyuzz
river

Red arc do a timer relay, use them all the time at work

Edit found on eBay, bit exy but
http://www.ebay.com.au/itm/Redarc-Ti...#ht_1119wt_689

[dave_101]

For adaptronic users I thought I would post this here. When I was looking at going Adaptronic I asked them about this issue, here is their solution.

Tried it on the bench and it works! You'll use physical aux output only. So here goes.
1. Set Aux 9 to MAP, set low and high threshold as desired. Low threshold is value for turning off.
2. Set Aux 10 to Blow-off valve. Go to Special Functions tab and set MAP Prime (ideally the same as MAP high threshold value), TPS to 100% (so TPS is not a factor), and duration (ms) to desired value.
3. Set a Physical Aux (4-8), and set to OR with output channels 9 and 10 set.
If MAP exceeds let's say 120 kPa (high threshold), the SC should engage. When it goes below 110 kPa (low threshold), Aux referenced to MAP will disengage, but blow off valve should be engaging by this time to provide the 5 second delay. If it's the blow-off valve by itself, the SC will not engage above blow-off threshold value.
This removes your ability to use the blow-off valve feature if you intend to install a turbo, though.
Cheers!
Frank