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Post by ratrodder on Jun 13, 2014 9:09:55 GMT
Hi everyone. I am currently fitting some K&N air filters to the rod, they are the 'cone' type, so not just an element in the original air box, and I have decided to fit them on the original elbows rather than just straight to the carbs. I was advised to replace the carb needle with 'BAF' code ones, but having now received them, they are a different type to the P5 ones. Any ideas what might suit?
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Post by johnwp5bcoupe on Jun 13, 2014 9:37:40 GMT
Which SU's are you using HS6's or HIF's fixed needle or floating? it may help the guy's with your question?
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Post by ratrodder on Jun 13, 2014 10:11:31 GMT
Hi John, they are SU's with fixed needles, I believe HS6, as they have the mixture/jet sticking out of the bottom. Having now realised this, have I answered my own question and perhaps need to move the jets rather than change the needles??
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Post by Roy of the Rovers on Jun 13, 2014 11:03:27 GMT
When you have a go and set it correctly can you let me know? I changed mine to exactly the set up you describe a couple of years ago and have put up with a flat spot and lack of oomph ever since. Wasnt really a problem when I barely used her but this year she is getting plenty of use!
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Post by cyf on Jun 13, 2014 16:49:43 GMT
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Post by enigmas on Jun 14, 2014 2:24:03 GMT
Just move both needles fractionally (and equally)up into their 'housing' within the air slides (rather than keeping them flush with the base of the air slide) This will cause a richer mixture overall. Then use a heavier weight oil in the dash pot. This will effect a richer mixture when you 'stab' the throttle under sudden hard acceleration.
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Post by ratrodder on Jun 15, 2014 4:54:43 GMT
Just move both needles fractionally (and equally)up into their 'housing' within the air slides (rather than keeping them flush with the base of the air slide) This will cause a richer mixture overall. Then use a heavier weight oil in the dash pot. This will effect a richer mixture when you 'stab' the throttle under sudden hard acceleration. This sounds a good plan, have you tried this yourself at all? |
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Post by enigmas on Jun 15, 2014 5:39:36 GMT
In a word, yes.  If you look at the design of the needles there are stations/variations in diameter in increments along its length. Lifting it into its housing a bit just goes to the next station or half station. Take a look at the chart in the link below p.13 There's a .004" difference in diameter just by lifting it fractionally. SU Needle Chart |
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Post by Roy of the Rovers on Jun 23, 2014 11:52:42 GMT
I tried the lifting needle trick on mine and, yes,  instead of the empty roar of gutless acceleration she actually picks up her skirts and sets off! It will do for now.. |
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Post by Deleted on Jun 23, 2014 13:19:13 GMT
...sounds like a hovercraft!
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Post by Roy of the Rovers on Jun 23, 2014 17:19:46 GMT
...sounds like a hovercraft! Stings like a bee  |
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Post by Deleted on Jun 24, 2014 10:02:58 GMT
P5bee?
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Post by Roy of the Rovers on Jun 24, 2014 10:43:32 GMT
You can put that on a T shirt  |
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Post by p5bdownunder on Jun 24, 2014 11:23:32 GMT
You can put that on a T shirt A P5Bee is for life, not just for Christmas......! |
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Post by Deleted on Jun 24, 2014 12:37:55 GMT
You can put that on a T shirt A P5Bee is for life, not just for Christmas......! I would rather have the earlier quote "Red Hot Slag On Arm" although probably not a good idea if you link arms with your wife or girlfriend! |
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Post by ratrodder on Jul 8, 2014 14:33:26 GMT
In a word, yes. If you look at the design of the needles there are stations/variations in diameter in increments along its length. Lifting it into its housing a bit just goes to the next station or half station. Take a look at the chart in the link below p.13 There's a .004" difference in diameter just by lifting it fractionally. SU Needle Chart Many thanks for your advice, it seems to work fine! |
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Post by Roy of the Rovers on Jul 11, 2014 10:57:47 GMT
I replaced my KL's with KW's and the difference is quite surprising. They work really well with the K&N filters and have done away with the dead-zone. More power throughout, less effort cruising up hills. Not sure on the economy side of things yet but hopefully not too horrendous!
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If you look at the design of the needles there are stations/variations in diameter in increments along its length. Lifting it into its housing a bit just goes to the next station or half station. 
instead of the empty roar of gutless acceleration she actually picks up her skirts and sets off! It will do for now..
