Quote:
Originally Posted by Christ
The current header on the bike, provided i can use it [configuration issues] is tubular mild steel and fairly light compared to the shorter iron manifold.
The intake will be replaced with filtered stacks to save space and a little weight, although it's cast alloy already and fairly light.
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For the sake of performance, I would try at any cost to keep the intake tract lenght.
Quote:
Originally Posted by Christ
I hope to be able to replace the oil pan and pickup with either a dry-sump setup or a smaller pan, as it's kinda large and hangs a bit, but that's not in the cards any time soon [more research and parts cost].
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Car engine oil pans are not designed for leaning angle, at least an oil pump swirl pot would be mandatory I think.
Quote:
Originally Posted by Christ
It's not so much that a 50hp bike is underpowered - it's certainly not - but more that it's a huge addition of weight, especially if I use a 4 speed gearbox setup with it [another 60-100lbs] and may be considered a bit of a 'pig' in terms of bikes. 700lbs of engine and trans is HEAVY when there's another 200-300lbs of frame, suspension, parts, 170lbs of rider, etc. Still not 'slow' by any means, but piggish comparatively.
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You are very right, the weight is number one issue because of what is gonna require of extra strenght in the handling departement.
I believe a VW 1500 or 1600 diesel is a very poor candidate in this department because it ended life in 1,9 TDi engines up to 150 hp so it means it was a little on the over-engineered side.
I would try and find a 1,5 Isuzu as found in Opels or a Peugeot unit again in 1,5.
There also is a very nice Fiat 1,4 turbo diesel.
How sourcable is it for you, I have no idea (you're in the US, aren't you ?) ?