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

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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Is that the floating needle Tim?

For a fixed needle try CP4. or no 6.

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DrMini- 1970 wasaMatic 1360, Mk1S crank, 86.6HP (ATW) =~125 @ crank, 45 Dellorto (38 chokes), RE282 sprint cam, 1.5 rockers, 11.0:1 C/R.

Thanks Dr I will check it out.

Looks like CP4 is the one. The car ran so much better and it idled really well.

Thanks for your help.

Rob

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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DrMini- 1970 wasaMatic 1360, Mk1S crank, 86.6HP (ATW) =~125 @ crank, 45 Dellorto (38 chokes), RE282 sprint cam, 1.5 rockers, 11.0:1 C/R.

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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1967 Cooper S - new front bearings to do.
1965 Cooper S shell - Slow progress. No time or money!
1966 Deluxe- next rustoration!
Mk 2 & XJ6 Jags. Less said the better.

Try no 6 if CP4 too lean.

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DrMini- 1970 wasaMatic 1360, Mk1S crank, 86.6HP (ATW) =~125 @ crank, 45 Dellorto (38 chokes), RE282 sprint cam, 1.5 rockers, 11.0:1 C/R.

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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1967 Cooper S - new front bearings to do.
1965 Cooper S shell - Slow progress. No time or money!
1966 Deluxe- next rustoration!
Mk 2 & XJ6 Jags. Less said the better.

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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DrMini- 1970 wasaMatic 1360, Mk1S crank, 86.6HP (ATW) =~125 @ crank, 45 Dellorto (38 chokes), RE282 sprint cam, 1.5 rockers, 11.0:1 C/R.

Sensational!

_________________
1967 Cooper S - new front bearings to do.
1965 Cooper S shell - Slow progress. No time or money!
1966 Deluxe- next rustoration!
Mk 2 & XJ6 Jags. Less said the better.