Joined: Aug 2017 Posts: 3,329 Threads: 372
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c.855 is only 19mm choke, so much more tractable than 21 or Speedy's heinous 25mm - and thus good mpg. Put it back on?!
The old Companion guru seems to suggest that 19mm is theoretically the best match for the engine size.
Joined: Aug 2017 Posts: 1,715 Threads: 47
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Location: Auckland NZ
Car type: 36 Nippy, 31 RM, 38 Special, 24 Works Rep
I get excellent performance on my pressurised Nippy engine with a 30 VM 5 855, I tried version's with 21mm and 24mm the 19mm appears to work the best. You need a good selection of jets to get optimum set up which takes a little time, I don't recall the sizes I used off hand and I am away in the middle of moving city's so cant look the details up present....Jon I believe I did give them to you at one time?
Black Art Enthusiast
Joined: Aug 2017 Posts: 3,329 Threads: 372
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they are in the article posted, I think, Ian... with lots of other peoples too...