Hi Guy's,
Can anyone tell me from richer to leaner what N99, JJH and N68X needles are please?
I've seen a few charts but it has left me more confused
N99, JJH & N68X Needles
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Re: N99, JJH & N68X Needles
I gave up on the JJH Vin on the LC and went to N68A
Ran better but like you say confusing as feck
Trial and error by me but I would love someone to get all the different ones measured and compared [-o<
Question to me is why does everyone say use JJH ???
Ran better but like you say confusing as feck
Trial and error by me but I would love someone to get all the different ones measured and compared [-o<
Question to me is why does everyone say use JJH ???
Can it yer old boiler
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Re: N99, JJH & N68X Needles
Im pretty sure the N68's are richer in overall than the 99's,i think the 68 denote's the diameter so it will be narrower so giving a richer mixture.
i think the tapers the same.
I maybe wrong of course,
I've got both so will have a look and see for sure.
Is it for a KR1 or are they fitted to an LC or such?
If they are then it's really a case of just trying different setting's to suit.
Strange though,i fitted them to my 350LC ,160RD main,N99 on the 4th airscrew 3/4 out and it runs great.
Dave
i think the tapers the same.
I maybe wrong of course,
I've got both so will have a look and see for sure.
Is it for a KR1 or are they fitted to an LC or such?
If they are then it's really a case of just trying different setting's to suit.
Strange though,i fitted them to my 350LC ,160RD main,N99 on the 4th airscrew 3/4 out and it runs great.
Dave
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Re: N99, JJH & N68X Needles
I'm glad it's not just me thenheadcoats wrote:I gave up on the JJH Vin on the LC and went to N68A
Ran better but like you say confusing as feck
Trial and error by me but I would love someone to get all the different ones measured and compared [-o<
Question to me is why does everyone say use JJH ???
I will see if I can get them measured at work and reply with my findings!
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Re: N99, JJH & N68X Needles
That would be great if you can?dave32 wrote:
I've got both so will have a look and see for sure.
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Re: N99, JJH & N68X Needles
Tuned LC with Ramairs
152.5 mains
45 pilots
1 1/2 airscrew
N68A on middle clip
Had them on 4th but left pot developed machine gun stutter on part throttle and lowering the needles sorted it
152.5 mains
45 pilots
1 1/2 airscrew
N68A on middle clip
Had them on 4th but left pot developed machine gun stutter on part throttle and lowering the needles sorted it
Can it yer old boiler
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Re: N99, JJH & N68X Needles
Agree I have never been able to get mine to run right on the JJH so fitted the 68X needles on middle clip & it runs great. pretty sure the 68 is leaner needle than the JJH the top section is the same but the 68 has a fatter taper making it leaner.