Tech Spam thread - because 1/4" BSP gets 5 hand spans to the jiggawatt

[Roman]

I guess it's just the difficulty of explaining the idea in a binary context of vaccum and atmo pressure, without a great indication of velocity either.

 

(Which is why it looks weird that it "fills up" from the valve end, if it showed the velocity better it would be clearer)

[Testament]

it's all about the integrals

[Steelies]

i think you'll find the benjamins are a factor too.

[Testament]

well yes, they are the common denominator

[peteretep]

Copper exhaust gaskets and brass 5/16" nuts for exhaust. Where to buy?

[Beaver]

Can get brass nuts at repco if desperate/just go sweet talk an exhaust shop

[peteretep]

Also high Zddp oil that's cheap and available lots of places. Where?

[Ghostchips]

Also high Zddp oil that's cheap and available lots of places. Where?

SOHC told me where but i forgot.  Have to ask him i guess.

[Yowzer]

/lingpost

[h4nd]

xkcd:

Carry on.

[kicker]

Also high Zddp oil that's cheap and available lots of places. Where?

Have a look at the Penrite HPR stuff at Supercheap

[Testament]

Bus oil?

[OSM Garage]

Is there such a thing as a M14OD-M12ID steel sleeve?

 

Trying to fit some struts that have a 14mm hole to a hub that has a 12mm hole and uses 12mm bolts. Dont want to drill out the hub in case I need to revert to factory struts

[peteretep]

do some maths regarding the wall thickness remaining if the sleeve was to be M14 outside and M12 inside. unless the threaded sections are offset it just doesnt work

[OSM Garage]

Sorry, maybe I shouldnt have stated M to indicate that the sleeve is threaded.

Basically it would be 14mm OD tube that has a wall thickness of 1mm

[Steelies]

get some thingies turned to suit, saves having to buy 5M of hard to find tube.

[Testament]

I found some tube on ebay to do exactly that a while ago to fit integrale evo bushes on my delta turbo. never fitted them but did obtain the tube and it was all gee. wasnt toooo expensive, maybe $30 for a foot of tube. expensive for tube I guess but you dont need much of it.

[Roman]

Electronics question people!

 

I bought a cruise control switch for my car.

 

Measuring the resistance with the switch while it isnt wired up, I get:

 

on  70 ohm

cancel 153 ohm

resume 230 ohm

set 620 ohm
 

I've got it wired up as an analog input, so it gets a 5V supply in one side and outputs to the ECU.

 

However whenever I pull on the lever for any option, it zings to 4.98 volts.

 

I've tried to find some circuit diagrams for how they're normally setup, one indicate that there's generally a 1kohm resistor on the output. Tried this, but same thing.

 

Any ideas? Does it matter if the resistor is before or after the switch?

 

Is there some formula or something for what value resistor would work?

 

Or do I need to limit the current being supplied or something like that. It doesnt matter what voltages it ends up outputting, so long as they are distinct and between 0-5v.

[downtrail]

Is it a 3 pin switch? should be wired like a tps with 5v sig out and a ground. You can try a 1k resistor from signal to ground if its only 2 pin should work like that.

[Roman]

Yeah so oddly the switch has three pins out, but there are only 2 pins/wires out on the cable.

 

Will be a prick of a thing to try fit a 3rd pin.
 

1k resistor doesnt seem to make any difference.

 

Might get my old man to check this one!