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The mkiv Supra Owners Club

Universal timer development


Guest Ash
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Has anyone got any ideas of any modifications they would like to fit to their car that require the use of a timer... and they didn't know how to make one, or where to get one from?

 

In the course of developing and refining my electric fan conversion I've knocked up a timer unit that can be adjusted to give a delay of between 1 second and 3 minutes (though this could easily be varied).

 

My original criteria was that the conversion must use the stock wiring, switching and temperature sensing. One snag was the sensitivity of the stock temperature sensor.

 

Often you'd get into a situation where the fan would come on and 2 seconds later it would switch off. Then 5 seconds (or so) later it would come on again only to switch off almost immediately.

 

So I've introduced some variable hysteresis into the circuit through the use of a timer. I've yet to discover the optimum setting but as the fan switches on it initiates the timer - which then holds the fan "on" for a pre-set time regardless of the on/off status of the temperature sensor.

 

The timer unit is in its own box about two-thirds the size of a fag packet and a bit deeper. The circuit is completely encapsulated to make it weather-proof. There is a small bracket that runs down the long side of the box, so it can be mounted on any flat surface. The time-delay is set by removing a small rubber bung, adjusting a trimpot using a small screwdriver, and replacing the bung.  

 

I'm sure my little timer box could be adapted for use with timing virtually anything on a car.

 

Yours,

J

 

PS

ADMIN: please note I placed this thread in Technical as my timer unit is not on sale. At this stage I'm primarily looking for technical application ideas.

 

 

 

(Edited by Ash at 10:01 am on Aug. 28, 2001)

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Hi...

 

I suppose the obvious one is a turbo timer. I would like a descreet turbo timer for my car, something like it runs for three minutes, activated via a button under the dash with the timer unit behind the dash.

 

How does that sound?

 

regards..............

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Yes, that could be done. The current design has the timer activated by application of the supply voltage but I could re-configure it so the timer activated by pressing a non-latching pushbutton.

 

Yours,

J

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Hi...

 

I assume you could tap into the handbrake switch and shut the engine down in the event someone tried to drive the car away.

 

I have been unable to get confirmation that any turbo timer would work with the stock UK spec alarm system and given that I don't want to fill the inside of my car with boxes I find this very appealing.

 

kind regards.............

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Sorry for the diversion of the thread but Clifford Concept 600's can come with a turbo timer built in if tha's what you've been looking for Gavin?

 

How about a timed NOS shot hit the button wait 3 secs (enough time to grab the wheel again) and bang? Or should that just be done with a button on the steering wheel.

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catch it by accident when your stopping at traffic lights!!! fortunately u have it in neutral and you just see a 40ft flame out the back :cool: (might not be strictly true...)

 

Sorry Ash diverting the subject.  I can't think of anything thaet would require a timer other than the shutdown turbo timer.....

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Quote: from Alex Holdroyd on 2:29 pm on Aug. 28, 2001[br]Sorry for the diversion of the thread but Clifford Concept 600's can come with a turbo timer built in if tha's what you've been looking for Gavin?

 

How about a timed NOS shot hit the button wait 3 secs (enough time to grab the wheel again) and bang? Or should that just be done with a button on the steering wheel.

 

Sorry, wouldn't know one car alarm from another. are you saying the UK cars are fitted with a Clifford 600 or that I could change my alarm system for Clifford with Turbo timer.

 

 

regards..............

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Gavin, the clifford is not stanard (sadly) it is a uprated alarm by gap security. The surestart is also very good and my daughters Honda has it, along with the remote start. WELL WORTH THE MONEY!!!!!!!!!

 

Ash..............

 

That nitrous shot sounds good, but u could make it with different timings e.g. N02 on for a certain period of time after the button is pushed e.g. on for

 

5sec

10sec

30sec

45sec etc

 

Sound good, or am i just talking c**p?

 

 

 

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Yes, that could quite easily be done. But I thought the injection of nitrous was controlled by the throttle?

 

That is to say, the system is "armed" then, at a particular throttle opening, the nitrous and fuel mixture is injected.

 

Perhaps I should say I've never had any experience with nitrous.

 

Yours,

J

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I've seen a couple of NOS installs on cars and bikes and they were all operated by a switch.

 

On the car it was wired to the horn push (Escort RS Turbo so l/h column stalk) and you pressed it in for more power and on the bikes they were wired to the pass light switch.

 

I wouldn't really want a timed one, not very safe I would imagine.

 

Cheers,

 

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Ash is entirely correct (as if that needed stating), according to the Wizards of Nos site, the Nos is only used when the throttle is down under acceleration, so you have plenty of time to press your button... get ready and jam the throttle.

 

It would be nice to get peoples views on Nos as 300 BHP for £700 sounds pretty good to me ;) We could have a template answer for all the people that turn up after FnF is released! (which features it extensivly), which kind of makes me think it's more a hollywood gimmick.

 

Oops sorry for being off thread, probably need another one.

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I always thought NOS stood for Nasty 'Orrible Stuff. :)

 

I think you perhaps should say, "£700 for 300 HP... for about 2 minutes."

 

To me, it's one of those things where the idea of it all sounds great... but the practical difficulties far outweigh the benefits.

 

Ultimately, it's each to their own I suppose.  

 

Yours,

J

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Well, i think it would be good to hav all that extra power sometimes. Like when your on a track day, or racing a car that is very fast, just to pull ahead.

Usually injected at 3/4 throttle or at a safe rpm to stop engine damage that can occur if it is injected when the engine is not ready for all that stress.

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Guest Terry S

High Power do a very nice NOS controller that allows both times & percentages of NOS you wish to use. It also allows you to delay the "Kick" so you can get the car off the line rather than wheelspin madly.

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