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


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What does a chipped tooth sound like? Bit of a vague question I know but one of our work trucks has always crunched pretty bad when going into reverse regardless of how long you sit with the clutch depressed first. Now it's also making a rhythmic thumping when reversing. Wondering if a tooth or maybe a synchro has given out?

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On 09/10/2021 at 19:11, yoeddynz said:

 

 (well... if you can call 3 or 4 MB per sec good. But it is for us.

 

We have RBI (via cell tower) because it’s all we can get short of Starlink. I consider 3-4 Mbps pretty good. (It’s actually shit, but during the school hols it’s been sitting around 0.5-0.8!!) 

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Aloha gentlemen, if one were to blow down a 1/4" fuel return line, how much resistance ought one expect to encounter?

 

I've just dropped the gearbox out of my car to swap over the "semi blocked" fuel return line in the car, then I went to test the spare and found it completely blocked. I put some compressed air down the one in the car again and it seems to have improved, but I'm hesitant to put the box back in unless I'm sure it'll work.

 

Edit: Follow up question, is it feasible to bend ali bundy tube by running it under the car, or does it really need to be bent up then installed?

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Is there any trick to welding 6000 series aluminium extrusions? Have a small side project that would be much easier if I started with an extrusion but being a noob at Al welding i have no idea about the finer points

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On 15/10/2021 at 07:39, MaxPower said:

Hey brought one of chinas finest Weber’s, looking down from from the top theres two jets? Which look to be round the wrong way one says 160 on the secondary and 170 on the primary is this right?

What engine are you putting it on out of interest? Bigger air jet means leaner at top end. Isn't unusual to have a larger one on the primary for fuel economy at cruise and having the secondary jetted richer for power under load. I'm keen to see how it works for you. I've got a couple Chinese dcoe 45s coming for a project. I've had issues of rubber components in Chinese carb kits not liking our fuel and swelling in the past. So wondering what these carbs will throw my way. 

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Since changing to a braided rear high pressure fuel pump I'm getting horrendous vibrations through out the car, the fuel pump sounds like a 747 and changes pitch a lot . So much so that I bought a new fuel pump. Is this common if it's touching the body?

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On 20/10/2021 at 20:57, Carsnz123 said:

What engine are you putting it on out of interest? 
 

I’m putting it on a 4g64 mitsi in the next couple of weeks, thanks for the advice that makes sense , will let you know if it works out. 

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5 minutes ago, oldrx said:

If I am wiring a 20 Ohm resistor in line between oil pressure sensor and dash, how many watts should the resistor be? 

For an oil light?

If you have a dead short for a lamp, 7.2w will flow at 12v.

What is the resistance of the lamp?

 

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Sorry confused myself (too many half finished jobs) resistor is actually for water temp sensor to factory dash gauge (original RX2 green ring sensor is NLA have to use later black ring type which will read wrong without resistor). 

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Adjustable suspension / struts question - had a search but couldn't find the thread / comment I thought I'd read a long time ago.

I'm looking at (in the near future) to be buying some FC rx7 adjustable suspension.  From searching around various websites, there's a lot to choose from;

XYZ = $1700

Lines Racing = $1100

Hakon = $1600

Yellowspeed = $1600

D2 = $1700

BC Golds = $1800

Max Pro = $2300

Plus I'm sure there's so many other more well-known Japanese brands out there for sale also.

My question is - any of the above brands known to be not great/shit/not cert-able?  Do I just purchase roughly based on price?  Avoid the cheap one and stick with the mid-range?

 

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