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Oct 17, 2019 22:56:32 GMT
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The last 5% of a project takes around 50% of the total project time :-) Made fine adjustments to the radiator's alignment using washers. Angle is now right so I replaced washers with aluminium spacers knocked up on the lathe. Parting things like these has always been a bit messy but I discovered why today, the parting tool was too tall so the cutting edge was above the bar's centreline! Why hadn't I noticed this before? Anyway, a few minutes attacking it with bench grinding wheel sorted that issue out. The new spacers saved around 15gms. Trimming the four rubber mounts' studs and replacing steel nuts with aluminium items removed a further 22gms. I have decided to keep a tally of the tiny weight shavings for a week to see just how much they add up to. OCD, maybe, but I find it fun and that is what counts to me :-)
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Last Edit: Oct 17, 2019 23:24:12 GMT by nalesutol
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jpsmit
Posted a lot
Posts: 1,269
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Would nylon washers work? Lighter even than aluminium
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Would nylon washers work? Lighter even than aluminium Good point, but I am not anal about weight. Oh, hang on, I am :-) I have some bar so I will experiment and report back
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Oct 18, 2019 20:51:06 GMT
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Started to play around with the air curtains again.
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Oct 18, 2019 21:30:20 GMT
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Sorting out EGT.
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Oct 18, 2019 23:17:17 GMT
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Can’t be far off running now ?
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Oct 18, 2019 23:18:33 GMT
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Can’t be far off running now ? The last 5% takes 50% of the build time :-)
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And 90% of the costs
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Oct 19, 2019 19:53:24 GMT
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And 90% of the costs Hopefully not! :-)
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Oct 19, 2019 22:33:07 GMT
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And 90% of the costs Hopefully not! :-) Sadly true.
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Oct 19, 2019 22:35:48 GMT
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If that was to be true, I still have around £750,000 to find :-)
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Last Edit: Oct 19, 2019 23:49:57 GMT by nalesutol
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I love your approach to saving weight. You may be interested in this, they do this to some racing Small Block Chevy's. ( maybe you know a guy with a CNC machine willing to write a program for your block?) www.lsmeng.com/Block-Lightening.html
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I love your approach to saving weight. You may be interested in this, they do this to some racing Small Block Chevy's. ( maybe you know a guy with a CNC machine willing to write a program for your block?) www.lsmeng.com/Block-Lightening.htmlThanks for this, obvious thing to do really. Using my modus operandi for weight saving, a little taken from a lot of places :-) However, most American V8 blocks are over engineered so can handle a fair bit of lightening. The Cosworth 20 block, although the best version of this block, is the weak point of the engine so lightening isn't as good idea, IMO. If I was to remove the engine to get the block lightened, I would sell the block (rare as poor quality wobbly children's play pony excecta) and replace with an aluminium version. smithandjonesengineering.com/blocks.html
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Why did RR change r.ocking h.orse (without the periods) excreta to poor quality wobbly children's play pony exrceta?
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Last Edit: Oct 20, 2019 8:09:14 GMT by nalesutol
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Darkspeed
Club Retro Rides Member
Posts: 4,847
Club RR Member Number: 39
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Rocking whores - just wanted to test something .....
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I guess whores isn't a swear word so not picked up, but poor quality wobbly children's play pony? There, did it again :-)
This algorithm is on some pretty strong sh1t :-)
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Last Edit: Oct 20, 2019 8:25:47 GMT by nalesutol
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Nice to see your empirical testing isn't limited to cars... On the block lightening, I've seen some blocks with absolutely every possible amount of weight removed. All the mounting points ( block mounted to the car with block plates), oilfilter mounting point, most of the bellhouse, etc. And smoothed out inside and out. ( getting rid of the as cast rough surface might actually help a little with strength, because it removes the stress risers) Pretty crazy but very cool to look at... But if yours is a rare desirable block that is on its limit as it is, you are right. An aluminum block would be the way to go...
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Some info on light weight blocks. ( probably not usable, but still interesting) Crosley used to make a furnace brazed block made out of sheetmetal. Eventually they replaced it for a cast version, which was much heavier. crosleyautoclub.com/Mighty_Tin.html
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Oct 20, 2019 14:42:05 GMT
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Some info on light weight blocks. ( probably not usable, but still interesting) Crosley used to make a furnace brazed block made out of sheetmetal. Eventually they replaced it for a cast version, which was much heavier. crosleyautoclub.com/Mighty_Tin.htmlInteresting story :-)
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Oct 20, 2019 14:46:46 GMT
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Nice to see your empirical testing isn't limited to cars... On the block lightening, I've seen some blocks with absolutely every possible amount of weight removed. All the mounting points ( block mounted to the car with block plates), oilfilter mounting point, most of the bellhouse, etc. And smoothed out inside and out. ( getting rid of the as cast rough surface might actually help a little with strength, because it removes the stress risers) Pretty crazy but very cool to look at... But if yours is a rare desirable block that is on its limit as it is, you are right. An aluminum block would be the way to go... That's why I have resisted the temptation to take the grinder to it :-) 600bhp on race fuel is probably for power than I will be able to put down to the track so there is no urgency for an engine rebuild. if I can use all the power I have then I will look for more, maybe nitrous as these blocks will cope with a hundred or so more ponies. However, if I can use more power, then a rebuild would be required and it would be at this point that I would look at an alternative block.
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