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

[gibbon]

funny enough I just did that, pulled the earth out and re-seated it, and it worked for a little bit, now it's dead again

too fucking hot today anyway

[Vintage Grumble]

Not really sure where to ask this, but I currently have the old BC red/black coil overs in my 86, they have 6kg springs rear, and 8kg up front, which I believe is sort of the go to for drifting? Anyways, me and the car are getting on a bit now, and I hardly ever use it on track, so I would like to go to a softer spring rate all around, so its a bit more plush on NZ's shitty roads. Anyone got any ideas on what's a good rate to go for? mebbe @Truenotch might have an idea? 

[Truenotch]

27 minutes ago, Vintage Grumble said:

Not really sure where to ask this, but I currently have the old BC red/black coil overs in my 86, they have 6kg springs rear, and 8kg up front, which I believe is sort of the go to for drifting? Anyways, me and the car are getting on a bit now, and I hardly ever use it on track, so I would like to go to a softer spring rate all around, so its a bit more plush on NZ's shitty roads. Anyone got any ideas on what's a good rate to go for? mebbe @Truenotch might have an idea? 

6 front, 4 rear would be nice for a comfy yet sporty ride IMO. That's what TRD used to offer in their regular springs. You could get away with going softer if you're really keen for a big softie. 

Droop travel is also really important for ride quality, as is compression and rebound damping. If your shocks are body adjustable you can set the total travel and use keeper springs to dial in the droop in the front. The rear is a little more tricky with an AE86 if you're still running a separate shock and spring, but there's ways to get it right. 

[Bling]

Running 6kg up front and 4.7kg progressive in the rear of my E7 Corolla, made specifically for AE86. 4.7kg was a right PITA to get right to get through cert with the droop / travel / compression carry on. Would have preferred 4kg in the rear for that reason, but limited options with the divorced spring. They are the BGRS x Swift AE86 Springs, which I got through Barry at MRP. The heavier springs in the rear would probably be better in an actual AE86 as my hardtop is probably a little lighter. Though it's pretty much a notchback anyway. Overall, would trade again with that combo.

[h4nd]

  

On 03/12/2024 at 08:12, fletch said:

> Mug ...

Sorted!

I drew it in CAD:   Crap-Ass Design

.. and sneaky post edit to fix a polarity faux-parr on the motors.

[h4nd]

Code nerds that way ------>  

           

[h4nd]

Anyone want a new baby desktop SMT pick and place machine?

https://www.qhsmt.com/product/tvm802ax-desktop-2heads-29slots-desktop-smt-pick-and-place-machine/

@ajg193 @Ned @Willdat?

[Ned]

Looks cute!

[ajg193]

9 hours ago, h4nd said:

Anyone want a new baby desktop SMT pick and place machine?

https://www.qhsmt.com/product/tvm802ax-desktop-2heads-29slots-desktop-smt-pick-and-place-machine/

@ajg193 @Ned @Willdat?

I don't think that is even worth giving away for free, looks like absolute trash. The only good thing about it is the Juki nozzles

 

Closed loop motors are not going to give any placement accuracy bonus if you don't have closed loop rails, especially if you are running belts

[fuel]

Not sure where to ask this but does anyone know of a good engine shop in the Waikato or Auckland regions? I have a 6G72 cylinder head that bent some valves but it looks like I can get away with replacement valves, however there is just one valve guide out of the 24 that has a slight crack due to the worst bent valve of the lot. Am looking to have that valve guide replaced and maybe a quick once over of the heads to check they are flat and have no cracks etc. Hoping to keep costs to a minimum as this was a bit of an unexpected mishap I didn't budget for hah. Looking to drop off this coming Monday and can pick them up in the new year.

Thx!

[440bbm]

taylor engine reconditioning in auckland but can get busy cos do alot of race motor stuff, or franklin engineering in pukekohe. franklins despite being heavy diesel stuff are bloody good at everything. have done a number of balancing and other stuff for me.

have used a few other places around north island but can easily reccomend those two

[NickJ]

Is there a way to hook a heatpump up to some solar panels so it fires up while the juice is flowing?

Do heatpumps even care if the power is always on/off?

[Willdat?]

12 hours ago, NickJ said:

Is there a way to hook a heatpump up to some solar panels so it fires up while the juice is flowing?

Do heatpumps even care if the power is always on/off?

Mine doesn't. Ie I could flick it off outside every day without issue. I guess you're going to run it through an inverter? If you had a rough idea when it will be generating enough power each day you could switch it on/off with one of these?
https://a.aliexpress.com/_mMrwGpl

[h4nd]

Yes, the internet is shit (victimising average users - another quality rant - long read)  https://www.wheresyoured.at/never-forgive-them/

[tortron]

 

 

[ajg193]

On 22/12/2024 at 19:00, NickJ said:

Is there a way to hook a heatpump up to some solar panels so it fires up while the juice is flowing?

Do heatpumps even care if the power is always on/off?

My heat pump guy reckons to not turn it on within 5 minutes of turning it off and that sudden power cuts while it is compressing is bad for the compressor

[mjrstar]

As well as the compressor, there would be other things that are unhappy, like it may not get a chance to scavenge the condensation from the catchment tray, and cycling the clutch more often than necessary would probably reduce lifespan. 

[NickJ]

Sounds plausible, lame though, new workshop roof is perfect to throw solar up on, panels are cheap but we don't have much to dump the energy into, cooling the house in summer is about it and even then, barely justifiable.

If there are shut down cycles in the heat pump then it would need smarts to communicate and be able to provide enough energy for that to happen, heading towards the level I have not many cares for.

[NickJ]

On 23/12/2024 at 07:28, Willdat? said:

Mine doesn't. Ie I could flick it off outside every day without issue. I guess you're going to run it through an inverter? If you had a rough idea when it will be generating enough power each day you could switch it on/off with one of these?
https://a.aliexpress.com/_mMrwGpl

My thoughts were the AC set to cool and then whenever power is coming off the roof it would do it's best, no fancy controls needed, in reality I guess you'd need something (battery) to prevent nasty hysteresis pissing the AC off

[h4nd]

Hot water cylinder is a 20kWh battery, but you need to get the energy there with thermo switches that'll cope with DC, and also have 2 cut mechanisms so you don't make a steam bomb in your home