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| HS4 needle sizing suggestions https://www.ausmini.com/forums/viewtopic.php?f=2&t=95797 |
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| Author: | Ballybob [ Tue Jul 25, 2017 8:35 pm ] |
| Post subject: | HS4 needle sizing suggestions |
My son has a 76 Clubman where Im after some suggestions on a good needle size for his carby. Its a 998 with LCB extractors and the HS4 has a ramflo air filter setup. I tried the AC needle but as you would guess it was lean. I wound out the mixture nut about a turn and a half and the engine ran awesome except it ran way too rich at idle. So can anyone give me some feedback on a needle suggestion to run with this setup. Cheers Rob |
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| Author: | timmy201 [ Tue Jul 25, 2017 9:15 pm ] |
| Post subject: | Re: HS4 needle sizing suggestions |
I have this kit with the AAU needle and is pretty good on the 998 http://www.minispares.com/product/Class ... STN17.aspx |
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| Author: | Ballybob [ Tue Jul 25, 2017 9:17 pm ] |
| Post subject: | Re: HS4 needle sizing suggestions |
timmy201 wrote: I have this kit with the AAU needle and is pretty good on the 998 http://www.minispares.com/product/Class ... STN17.aspx Is that the floating needle Tim? |
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| Author: | drmini in aust [ Tue Jul 25, 2017 10:27 pm ] |
| Post subject: | Re: HS4 needle sizing suggestions |
For a fixed needle try CP4. or no 6. |
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| Author: | Ballybob [ Wed Jul 26, 2017 7:21 pm ] |
| Post subject: | Re: HS4 needle sizing suggestions |
Thanks Dr I will check it out. |
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| Author: | Ballybob [ Mon Jul 31, 2017 7:16 am ] |
| Post subject: | Re: HS4 needle sizing suggestions |
Looks like CP4 is the one. The car ran so much better and it idled really well. Thanks for your help. Rob |
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| Author: | drmini in aust [ Mon Jul 31, 2017 7:45 am ] |
| Post subject: | Re: HS4 needle sizing suggestions |
CP4 was the needle used in Police Cooper S with the twin HS4s and Ramflo filters. I have used it in a few 998s and 1098s with a single HS4 and Ramflo. |
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| Author: | AEG163job [ Wed Aug 02, 2017 3:37 pm ] |
| Post subject: | Re: HS4 needle sizing suggestions |
Just about to fit twin HS4's to my new engine job. No idea what needles are in the carbs! Thanks Doc for the heads up. |
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| Author: | drmini in aust [ Thu Aug 03, 2017 6:24 pm ] |
| Post subject: | Re: HS4 needle sizing suggestions |
AEG163job wrote: Just about to fit twin HS4's to my new engine job. No idea what needles are in the carbs! Thanks Doc for the heads up. Try no 6 if CP4 too lean. |
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| Author: | AEG163job [ Fri Aug 04, 2017 10:02 pm ] |
| Post subject: | Re: HS4 needle sizing suggestions |
Decided to check what's there - AAK which, according to the no.s below look far too lean. Thanks again mate. AAK CP4 6 1 0.0890 0.0880 0.0890 2 0.0855 0.0852 0.0850 3 0.0830 0.0825 0.0814 4 0.0807 0.0790 0.0785 5 0.0784 0.0757 0.0755 6 0.0760 0.0725 0.0725 7 0.0735 0.0690 0.0696 8 0.0708 0.0655 0.0666 9 0.0677 0.0620 0.0636 10 0.0645 0.0585 0.0606 11 0.0613 0.0545 0.0577 12 0.0580 0.0510 0.0550 13 0.0550 0.0470 0.0520 14 0.0520 15 0.0490 16 0.0460 |
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| Author: | drmini in aust [ Fri Aug 04, 2017 10:23 pm ] |
| Post subject: | Re: HS4 needle sizing suggestions |
Looks like #6 is slightly leaner than CP4, I thought was richer. My bad, it's been a while since we sold Barney.. Check them on http://www.mintylamb.co.uk/suneedle/ it shows the differences well, |
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| Author: | AEG163job [ Fri Aug 04, 2017 10:36 pm ] |
| Post subject: | Re: HS4 needle sizing suggestions |
Sensational! |
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