bstc and low alchy light

[Turboaddict]

anyone who has the smc and boost command. Did you hook up a wire to the low alchy light? Is this necessary? Just curious since I didn't hook up any wire from the bstc to the low alchy light wire.

 

[BLACK6PACK]

Got both, and they are not related to each other in any way in my car.

 

[Roger]

One of the reasons I'm taking so long to get my alky working.
I'm using the low alky light to operate a relay which will shut off 12v to the BSTC, to keep the BSTC off line whenever the alky is low.
I'm also working up a Caspers knock gauge to have a certain amount of knock to shut off 12v to the BSTC.
Other than these two modifications to the 12v feed to the BSTC, I'm not presently planning on any other mods - except updating the alky kit with all the latest mods.

 

[salvageV6]

You can use the low alky. light, or a KR trigger to open the signal to the wastegate solenoid through a relay.

This will immediately limit your boost to spring pressure.

I wanted to do boost scaling with the BSTC but have already used that feature with the 3rd gear switch.

Even when the low alky. light comes on you prolly have a couple of long runs left before you get into trouble.

I bought a flow switch I will be trying out in the spring for my ultimate alky. safety item.

Just my .02.

 

[turbo]

Salvage V6,
Could you explain the wire connections from the low alky. light to the relay and solenoid? Like which wires go where?

Sounds like a great idea. Thanks!

 

[turbojimmy]

I guess there is a couple of different ways to do it.

The BstC has a trigger wire that can either activate the BstC at a certain threshold (like when hooked to the TPS wire per the instructions). If you flip the 2nd (I think) dip switch, energizing that wire has the opposite effect - it shuts off the BstC. You could then just replace the TPS wire with the low alky light feed, right? I'm not sure what the TPS trigger is doing for me anyway, when the BstC is on, I want it on all the time.

You could also hook it up to the secondary trigger and adjust it to it takes out all the boost.

I like the relay thing, too.

My problem is that when my tank is about 1/3 full (or 2/3 empty for you pessimists), the low alky light begins to flash on launches, braking, and cornering. Seems like it would be a PITA if wired to the BstC. Still plenty of alky, but the BstC would be working intermittently. It's a good safety, but I can see the red low alky light and switch off the BstC.

Now a knock sensor trigger would be cool......

Jim

 

[salvageV6]

That KR trigger is a little used option on the Maxeffort chip.

Someday I'll figure it out and report back.

The low alky. light would be connected to a relay coil, preferably a low current coil one. The output wire that runs the stock wastegate solenoid out of the BSTC would go through the normally closed contact of that relay.

When the low alky. light comes on it will switch the relay and you will get no more wastegate solenoid operation hence no bleeding and no increased boost over spring pressure.

Good theory but problems with using it are as follows.

1. Requires modifying the Alky. kit low level signal.
2. That signal fluctuates as described by Jim above so the relay would turn on and off at the threshold of the in tank switch in the bottle. Can be solved with latching the relay and using a reset switch for after you fill the bottle.

Lots of cool electronic things can be done. However it's much easier to fill the bottle, even with water or grain alky. when the light comes on the first time....