Show And Tell

Keep the fun and games in here for now please :-)
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Fred
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Re: Show And Tell

Post by Fred »

Was it above deck? or did you just mill the quench off?
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Peter
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Re: Show And Tell

Post by Peter »

I just milled the quench off. I figure it's a better solution that putting a J30 crank in a J35 which would lower the compression down to around 7:1, and make for a small displacement engine. I only ordered one piston just to see how thin it would make the top, but I don't have a micrometer with jaws that deep. I milled about 25 thousands off. The really fun part would be trying to match the weight of 6 pistons.
:-p
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Fred
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Re: Show And Tell

Post by Fred »

I doubt you lost enough compression to offset the loss of quench, but hey, give it a try :-)
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Re: Show And Tell

Post by Peter »

I was putting a culvert in a ditch with a 1950s ~25 hp tractor/backhoe, and in its old age it won't pull itself up steep hills. So I was planning on using my truck to tow it around. I started up the steepest hill I had to climb in first gear doing about 2000RPM without even towing the backhoe yet, and it broke a u joint hoop. I couldn't believe it, I was going strait ahead, and not even being aggressive. That truck has seen way worse terrain than that running chains. It's a pretty strange failure in my opinion. In the past it has either twisted an axle off, or trashed the spider gears. It doesn't look like the hoop was damaged, or had any porosities in it.
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toalan
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Re: Show And Tell

Post by toalan »

This is my testing/debug jig for the PCB that is part of my spartan lambda sensor. It is a clothes pin with pogo pins poking through it, on the right is the pcb that goes inside the connector of the Bosch 4.2 Lambda sensor, the programming/debug header gets clipped off once the pcb passes my QA tests and then it begins life as the controller for my spartan lambda sensor. It pains me that I have to resort to rigging up such a crude rig, I have a CNC machine and 3d printer and really should be able to make a super bad ass jig but I spent a week modelling a good jig and it never came out correctly, so i had to resort to this.
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Fred
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Re: Show And Tell

Post by Fred »

I love it! :-) Both the DIY way you've done it, and the size of the PCB :-)
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ivan141
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Re: Show And Tell

Post by ivan141 »

Wow.. that is a very neat PCB indeed. I take it you're more than just a hobbyist at pcb design?
That testclamp is not any different in principle to professional ICT testbeds, if it gets the job done
why spend more?
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Fred
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Re: Show And Tell

Post by Fred »

http://www.diyefi.org/history.htm < scroll down to the earliest 2007 entry. I'm unsure what Alan's education is, but I do know he's had lots of practice designing products that people actually use. Unlike me LOL :-p (@ all FreeEMSers who don't run their engines/use it)
DIYEFI.org - where Open Source means Open Source, and Free means Freedom
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Peter
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Re: Show And Tell

Post by Peter »

Just say no, to homemade thermostat housings.
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