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More poorly built engines
Another engine that's in for a rebuild at my shop... Someone had rebuilt or tuned it up before, and whoever it was, had conveniently marked each connecting rod with a punch. 1-2-3-4. Very nice, thank you. But if he bothered to do that, why didn't he bother to weigh them puppies? 1: 569g 2: 576g 3: 593g 4: 580g A whopping 24g difference! These rods never left the factory in the same engine, someone scraped them together from a parts pile and threw them in this engine without looking twice. Factory rejection limit for weight difference is 8-10g. Rods were made in 2 or 3 main weight groups. Rods from different weight groups were never used in one engine. Because of this... I can't continue assembling the customer engine until we find a matching set of rods.. trying to trim 24g off a stock rod is impossible, without major sacrifices to reliability. I hit my own diminishing parts stash and found him a 580g rod, resulting in a weight distribution over 11g span. Much better, and trimmable... but still requires a lot of grinding. Maybe this message works as a reminder for someone who is building one of his (or her!) first engines. Jan |
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Jan Andersson wrote: > Maybe this message works as a reminder for someone who is building one > of his (or her!) first engines. ------------------------------------------------------------ In the same vein, it's unwise to believe ANY supplier is honest nowadays. I paid California Import Parts about $300 for a set of stroker I-beams. Weight span was 16 grams. (You can only shave about 6g off an I-beam type rod.) They refused to replace the set or to refund my money. ------------------------------------ By comparison, the last set of rebuilt stock rods I got from RIMCO had a weight span of only 6 grams and two of them were within 2g of the lightest -- an easy set to easy to balance. -Bob Hoover |
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Kevin Holzer wrote: > Nix this. Supposed to be private. ---------------------------------------------------- No problem. Nobody reads this **** anyway :-) Yeah, Lou & Nancy are honest, in my opinion. But that's only based on knowing them for 25 years or so. I'm not sure what she meant by 'arguing' unless it was over at their old shop, where I had words with a fellow who thought it was a good idea to run-up wide-five lug bolts with a pneumatic tool set to about 600 ft-lbs. Speaking of the 'sermons,' I offered Nancy a chance to sell the printed version. She turned me down flat :-) -Bob Hoover |
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"Anthony W" > wrote in message
news:VsKpe.5923$Kj3.494@trnddc03... > wrote: > > > Speaking of the 'sermons,' I offered Nancy a chance to sell the printed > > version. She turned me down flat :-) > > > > -Bob Hoover > > > I'd buy a copy. Have you considered marketing them elsewhere? > > ...................I'd buy his complete works in a heartbeat. And I wouldn't be worrying too much about the cost either. |
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On Tue, 07 Jun 2005 22:00:08 +0300, Jan Andersson
> wrote: > > >Another engine that's in for a rebuild at my shop... > >Someone had rebuilt or tuned it up before, and whoever it was, had >conveniently marked each connecting rod with a punch. 1-2-3-4. Very >nice, thank you. Reminds me of my friends Humber engine which he bought at an autojumble (swapmeet). Someone had rebuilt it in the past and found two of the bores scored. So instead of getting the engine bored up to the next size, just had the two cyliners that needed doing done. Goodness knows how long the engine had been running with different sized pistons! -- Howard Rose 1966 VW Beetle 1300 Deluxe 1962 Austin Mini Deluxe 1964 Austin Mini Super Deluxe http://www.howard81.co.uk/ (cars on website) |
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