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

[tortron]

also interested. or id like a sheet of at least 50mm thick, 300x300 or bigger. duro of about 60-70

[japawagons]

Spent the day digging... Pretty much all the Alfa Touring Cars were solid mounted. 

Them using super aggressive 2 way LSDs pretty much convinced me to lock my diff. So with that in mind, I feel like I'm going to start with Solid Mounts. If that ends up being a negative step then I will pour my own Polyurethane Mounts.

[Yowzer]

Chuck the balance shafts back in and you'll be fine

[japawagons]

Just now, Yowzer said:

Chuck the balance shafts back in and you'll be fine

 

Technically they are still in the engine. They're just no longer rotating. 

Engines in dire need of a birthday. Just checked the Oil Catch Can and it's full. Engine must be breathing pretty heavily. 

What I've learnt in Racecars is if everyone tells you it's a bad idea, it's generally a good idea.

[Transom]

Ok here’s a question - will a petrol engine fire on engine start ether with no spark ? ??? Can it give a chuff just from compression ? 
 

attempting to wire something that has many ways to put the leads on coil pack don’t seem to have visible spark at plugs but have had a couple chuffs when I put ether down the throttle 

[japawagons]

It might give you a clack, like a detonation event but even that's unlikely on a cold engine. 

In my experience, you won't even get a kick with no spark and engine start. Just a continuously rotating engine.

You should be able to pull a plug, and earth it and visually watch the plug spark cross the gap.

[Transom]

Yeah it’s getting an almost fire on engine start - have tried earthing a plug out but can’t see or hear a spark - will go for fresh eyes in the morning 

[Carsnz123]

On 11/04/2020 at 17:30, japawagons said:

What I've learnt in Racecars is if everyone tells you it's a bad idea, it's generally a good idea.

I apply this to many aspects of my life and it hasn't worked in my favor very often

[japawagons]

Just now, Carsnz123 said:

I apply this to many aspects of my life and it hasn't worked in my favor very often

This isn't generally transferable to life in general but there is one very easy way to clarify this.

If someone is telling you that you're method is a bad idea. Ask them whether they have ever done it themselves. If the answer is no. A grain of salt should be inserted.

At this point, advice should still be sought, but aimed in the direction of someone who has experience in your field of exploration.

 

Locked Diff is a perfect example. I used to be very anti locked diff. They're called diffs for a reason, to differentiate wheel speed through a turn. I had never locked a Diff. 

Everyone who I spoke to that indicated that a locked diff in a FWD is a terrible idea. Had never raced a FWD car. And also never locked a diff, let alone in a FWD car.

Found person who ran a FWD car with a locked diff. Advice - fucking awesome on the track. Saves heaps of money. Bit shit trying to move around at slow speed.

They didn't indicate that it was either a good idea or a bad idea. They offered a nuanced opinion. Offered Pro's and Con's.

 

In my experience people who know never paint a black and white picture. They will never give you a yes, no, good idea, bad idea.

But people don't like grey, they want yes or no, right or wrong.
 

 

[japawagons]

Double post.

Sorry about the rant. Total non technical Spam.
 

[RUNAMUCK]

Gas cylinder question 

How long do they last before needing retesting? My F argosheild ownership has 2004/11 stamped in it.  And its almost empty. 

Might be time for a retest?

[Beaver]

Some are 5, most are 10

 

"Beverage and some welding gases require a periodic test cycle of 5 years while most other gas cylinders, argon etc, require a testing cycle of 10 years."

 

 

[RUNAMUCK]

Are these any good?

I scored it for nix from a friend after she cleaned out her dads garage. (Along with a box of stop smoke/stop leak/ etc.etc)

[RUNAMUCK]

I could fax it to @tortron since he cant find his

[Transom]

They make an ok powerbar once that silly pointer thing snaps off 

once upon a time they were all we had for torque wrenches for the home mechanic - would not trust it for anything expensive or critical now 

[NickJ]

Just now, RUNAMUCK said:

Are these any good?

I scored it for nix from a friend after she cleaned out her dads garage. (Along with a box of stop smoke/stop leak/ etc.etc)

Really handy where specific torques need to be set and then a locknut secured like landrover diesel cambelt tensioners.

[Kiwibirdman]

I have the same one.

Was perfect for hydraulic control banks that had to be 20 ft/lb and no more, because you could see it getting close. The guys using the expensive click type ones always went way over and then the control spools would bind up. 

[ajg193]

Like my flat mate tightening his wheel nuts "it only clicked once so I kept going"

[yetchh]

Who uses a torque wrench to tighten wheels nuts? 

 

Totp meh..  Knew I should've quoted.. 

 

[M.H.]

Just now, yetchh said:

Who uses a torque wrench to tighten wheels nuts? 

The tyre shops after doing them up to 950nm with the rattle gun