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Cheers |
Sorry, The chain/cam sprockets do not go face the same 123 faces inwards, 456 faces outwards. If you make them the same the chain chews metal off the sprocket. The reason is the cylinders are offset, this was done to help align the chains straight.
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Ok. I think that is pretty obvious.
The big ends?? I take it with the ARP tension the big ends are resized at this torque as it may or make them out of round ? Lyndon |
Yes, for example if you true the rods at 20 LB and change bolts to 40 LB. it is not the same any longer. On the sprockets you may say it is pretty obvious but when Motor Mi---- was in business I dont think they ever got it correct once.
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Ive got real reservations that my ARP bolts would have been installed properly. I’ve got 4000 miles into the car today. In folks collective experience, would the failure have already happened? Sounds like it based on Williams experience
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Perverse as it sounds, think we’re all learning a lot from the debates playing out between Winders and Henry. It’s teasing out some very reputable perspectives on all sides. Occasionally there are some curse words. Every now and again, there’s good humor. Play on I reckon and thanks for taking the time to hash it out.
Before anyone jumps down my throat, I have great respect for winders and his research, field testing and patronage. Without him and folks like him, there wouldn’t be a need to push the envelope. Same for Henry who needs no re-introduction. |
Henry - when you refer to 1250-1500 HP motors, are you referring to drag motors? Do those guys reuse ARP (or other bolts torqued with a stretch gauge) until the gauge says they have stretched more than the few thousandths specified as OK?
Up until now I haven't seen any engine builder or mechanic say that rod bolts which haven't stretched shouldn't be reused. Nobody mentions the nuts that I recall, though. Porsche just says replace their bolts and nuts. |
Glenfield if it made it 4000 miles.. your most likely good I would say 95%
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Thanks William. Much appreciated
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^^^, over stretched (over rev) or improper installation means imminent failure. We have seen engine last between -60-90 secs where a bolt was over stretched (similar to not stretched or torqued correctly on install). My own GTI lasted 52 seconds on track before I had 2 large holes in the block and parts of pistons and wrist pins sitting on the under tray. Many thanks to the provider of the TCU tune in the DSG gearbox.... :)
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Thanks William. Much appreciated
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Glad to help, have had many calls through the years where the car ran great about 60 miles. Last one was guy named Buzz. Pretty orange 73' with 3.0. Not sure where it was built.. WK
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https://www.f1technical.net/forum/viewtopic.php?t=27372 |
I've heard that often. Long standing customers in the VW drag and off road world, among other things, making for brand loyalty? I can't say I have seen reports of their rods failing, at least more than other rods. Mine haven't, but that's hardly definitive. Cost was a factor for me.
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It was state of the art for.:::/ http://forums.pelicanparts.com/uploa...1615940368.jpg |
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