Does it need to be same, rather complex shape, circular at each end, but rectangular in the middle, (to fit in it's alloted space)? More complex shape = higher fabrication cost. I have no idea, does anyone else?View attachment 114758
Ok, so having spoken to Andy, it is highly doable.
I haven't proposed making it flexible yet. Been discussing other things:
The pump end has a specific seal. Is this available separately?
The clip that holds 30 into 29 above. He needs one to ensure it works. Is this available? Or anyone have a spare? I have a spare thermostat housing I can send him.
Stainless/plastic mix is not a problem. He has replaced this material pipe before.
He would rather a bulk order, and have one person responsible for distribution than deal with him directly at the moment.
If this runs into hundreds of units, he will deal with orders himself.
Any questions anyone???
agreed Mac, circular could make it cheaper as various SS pipe sizes are readily available.Does it need to be same, rather complex shape, circular at each end, but rectangular in the middle, (to fit in it's alloted space)? More complex shape = higher fabrication cost. I have no idea, does anyone else?
Mac.
The problem with that would be the layers, most 3d printed plastic deforms at 90 degrees and even worse most absorbs moisture and breaks down!I don't know the part well as I don't have an FSI, but could a 3D printed part be a cost effective alternative? It may not have the same longevity as s/s, or even the original, but I'm guessing it would be a lot cheaper to produce.
Any idea where that information, on creating deliberate turbulence, can be found? It's very important, if correct.I would also be interested, price dependent.
I believe the flat section in this pipe is to create turbulence in the coolant, to avoid lamina flow.
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This is why Andy asked about the shape and fitting. I said the the bit in the middle was a cable clip mount.Any idea where that information, on creating deliberate turbulence, can be found? It's very important, if correct.
I'd just assumed it was that shape to allow it to fit, in one of the part's applications across the VAG range.
Mac.
Is the cross sectional area, of the rectangular section very different from that of the circular section?This is why Andy asked about the shape and fitting. I said the the bit in the middle was a cable clip mount.
He also asked about the 2 "nipples" on the flat surface.
The narrower part is too long to create the venturi affect though I think.
The restrictor could be to keep the flow rate low enough to maximise the amount of heat it takes up. If flow is too fast, heat take up is reduced, (same, but in reverse, goes for radiators in home heating, high flow, low heat output). The complex shape, (difficult to achieve with injection moulding), of our pipe shape doesn't, for me, fit that purpose though, and it's used across several VAG models, with differing cooling systems, but you never know I suppose.Hi Mac, restrictions in the cooling circuit are not uncommon. I once came across a brass restrictor in an RX8 without which it would overheat. I did not believe it at first but that was the case.
Somehow I doubt it would make any difference on this car. I suppose if the dimensions/volume is kept the same give or take it would function ok. Maybe it is down to the manufacturing tools at the production line or similar.
There was someone on ebay called "Malweld" that does custom aluminium fabrications of all sorts. I asked him to do the "Y" piece right after the thermostat to fit my aftermarket hoses. He disappeared and never responded. Maybe if someone calls him from the UK he would take up on this job. Seems simple enough given access to the right tools.
I'm with you Andy. Having read your earlier post, and wishing I'd read it before, I agree with your thoughts completely.Am I being thick but the flow rate of the pump that matters, removing the flat for round just increases the coolant volume in the system by a little, and also the pump flow rate is dictated by engine revs anyway!
Andy