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Timing chains kit
http://forum.triumphdolomite.co.uk/viewtopic.php?t=34631		 Page 1 of 1
Author:  new to this [ Sat Jan 05, 2019 7:01 pm ]
Post subject:  Timing chains kit
I see Rimmers sell a conversion kit,to convert single chain to Duplex,is the Duplex chain harder wearing ? and is there enough room behind the timing cover to get it in ?

Dave
Author:  xvivalve [ Sat Jan 05, 2019 8:27 pm ]
Post subject:  Re: Timing chains kit
All Sprints have duplex as standard Dave
Author:  new to this [ Sat Jan 05, 2019 9:06 pm ]
Post subject:  Re: Timing chains kit
Quote:
All Sprints have duplex as standard Dave
Alun

Thanks,I was really thinking about 1850 / TR7 is it a worth while mod to do, do Duplex chains last longer ?

Dave
Author:  tony g [ Sat Jan 05, 2019 9:09 pm ]
Post subject:  Re: Timing chains kit
You cant fit duplex to slant unless the deeper timing cover is used and the double sprockets wont fit in standard cylinder head area. The duplex conversions apply to OHV engines where there is space.

Tony
Author:  Richard the old one [ Sun Jan 06, 2019 10:06 am ]
Post subject:  Re: Timing chains kit
Is there any real advantage of fitting a duplex timing chain to an OHV engine or will it just increase the timing chain noise?
Author:  soe8m [ Sun Jan 06, 2019 4:52 pm ]
Post subject:  Re: Timing chains kit
Quote:
Is there any real advantage of fitting a duplex timing chain to an OHV engine or will it just increase the timing chain noise?
On a std engine of no use. It will only cause a mariginal loss of hp.

Jeroen
Author:  sprint95m [ Sun Jan 06, 2019 4:55 pm ]
Post subject:  Richard….
Quote:
Is there any real advantage of fitting a duplex timing chain to an OHV engine or will it just increase the timing chain noise?
On the six cylinder engines, the 2 litre was simplex
whereas the 2.5 duplex.

On the T2000
it was common to uprate their 2 litre engines because the duplex chain is much longer lasting.
If there is increased noise I haven't heard mention of it.

I don't have the part numbers to check, but I think the four cylinder and six cylinder 2.0 timing gear is identical.


Something to consider is the tensioner, Chris Witor doesn't have OE. The replicas only last a fraction of the time
https://www.chriswitor.com/proddetail.php?prod=145866RP


Ian.
Author:  yorkshire_spam [ Wed Jan 09, 2019 11:14 am ]
Post subject:  Re: Timing chains kit
The replacement engine I'm (slowly... 2 years in!) building for the Spitfire (1500) will have a duplex chain and vernier timing gear for 2 reasons....
1) I have trust issues with some replacement parts (ie. timing chains) with regard to quality.
2) I intend to tune and thrash the nadgers off the engine once it's finally complete.
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