Su carb needles withK&N air filters
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tractor boy
Su carb needles withK&N air filters
Hi its tractor boy just making a start on all the jobs that never got done during the summer. 1850 is off the the road for winter and i would like advice on the correct needle to fit in the su carbs now i have fitted K&N filters and stub stacks.The engine doesnt pickup cleanly until it has done 4/5 miles.All other settings ignition etc are spot on. I didnt change the needles when i fitted the air filters. THanks for you help.Tractor boy
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Toledo Man
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Re: Su carb needles withK&N air filters
You'll need richer needles with K&N filters because the extra airflow will result in a weaker fuel/air mixture.
Toledo Man
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West Yorkshire Area Organiser
Meetings take place on the first Wednesday of the month at 8.00pm at The Railway, 1 Birstall Lane, Drighlington, Bradford, BD11 1JJ
2003 Volvo XC90 D5 SE (PX53 OVZ - The daily driver)
2009 Mercedes-Benz W204 C200 CDI Sport (BJ58 NCV - The 2nd car)
1991 Toyota Celica GT (J481 ONB - a project car)
Former stable of SAY 414M (1974 Toledo), GRH 244D (1966 1300fwd), CDB 324L (1973 1500fwd), GGN 573J (1971 1500fwd), DCP 625S (1977 Dolomite 1300) & LCG 367N (1975 Dolomite Sprint), NYE 751L (1972 Dolomite 1850 auto) plus 5 Acclaims and that's just the Triumphs!
Check my blog at http://triumphtoledo.blogspot.com
My YouTube Channel with a bit of Dolomite content.
"There is only one way to avoid criticsm: Do nothing, say nothing and BE nothing." Aristotle
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Jon Tilson
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Re: Su carb needles withK&N air filters
Bit simplistic is that Dave...
You need to set it up on a rolling road really to get the best. Or you can have a look at the Minty Lamb web site and his SU
needle comparison chart, which is great.
Dolly 1850's use ABK IIRC and I think you can see an ADH is a bit richer at the bottom. This was too much so for my spit 1500
so I ended up with ABK's in that, but these are weak on a dolly top end wise even on the standard air filter.
You can buy a lot of needles for the cost of a rolling road session, but it takes a lot of time...
Jonners
You need to set it up on a rolling road really to get the best. Or you can have a look at the Minty Lamb web site and his SU
needle comparison chart, which is great.
Dolly 1850's use ABK IIRC and I think you can see an ADH is a bit richer at the bottom. This was too much so for my spit 1500
so I ended up with ABK's in that, but these are weak on a dolly top end wise even on the standard air filter.
You can buy a lot of needles for the cost of a rolling road session, but it takes a lot of time...
Jonners
Note from Admin: sadly Jon passed away in February 2018 but his humour and wealth of knowledge will be fondly remembered by all. RIP Jonners.
Hmmm.......
I suggest fitting an original air box to see how it runs.
If you want to upgrade the air filter I suggest fitting an external conical type to the original air box (via a Y-piece).
Ian.
If you want to upgrade the air filter I suggest fitting an external conical type to the original air box (via a Y-piece).
Ian.
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