What would be the needle choice when running the 1"1/2 SU on an 1100 standard trim engine for normal day to day driving? I'm replacing the 1"1/4 on the 73 "S".

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1964 998 Cooper , 1968 Morris 1100

Hi David, I have no idea.
Just thought i'd say hello.

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Dog Food! Most kids like it more than Broccoli.

ADC is the needle ! As recommended by Russell at MinisRus

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Hi Ant
thanks for the christmas message, nice thought.

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1964 998 Cooper , 1968 Morris 1100

Do you know if its a fixed or floating/spring needle??

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http://www.youtube.com/watch?v=nDMkVq1jRGU

It is a fixed needle and if it wasn't, I would be converting from floating to fixed, a job I have done in the past.

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1964 998 Cooper , 1968 Morris 1100

Vizard suggests use a red spring with M1 or BQ needle.
If head modded he says H6 or AN.
Of course the filter used will affect this too.

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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.

no good for a fixed needle carb



here's the chart for the ones Dr Mini has listed

http://www.morrismini.com/SUNeedlesV2.aspx?linklist=AN;BQ;H6;M1;

you can see that H6 and M1 are so close there's no real difference, AN would be a good economy needle, BQ would give good full-throttle response

from my little bit of dyno testing, our motors spend most of their time around station 3-4, so those needles are roughly the same

as soon as anything is modified from standard, it's all vaguely educated guesswork

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did I tell you that I won a trophy?

OK for a fixed needle HA is the one, exactly the same profile as the ADC and again as recommended by Russell from MinisRus

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Before people ask WHY we use the earlier fixed needles, it's because they don't wear themselves and the jets away like the floating ones do.
When this happens they run rich, rich, rich...
And I've read this can happen in 20,000 miles.

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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.

We have a standard 1100 +40 with 1.5 su aand a NO.4 needle , it's very good.

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That's why it's good to be.............ME

Thanks for the replies fellas and Doc, thanks for saving me having to explain why I prefer fixed needles.

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1964 998 Cooper , 1968 Morris 1100

how do you tell the difference between the two?

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1975 Leyland Mini: 1060cc - resto/ ex-hsc project.

HA is very much like an AN - leaner than the others under higher throttle openings... better for a car with a standard head I guess, as it has less air flow, therefore can't handle as much fuel

added to the chart

http://www.morrismini.com/SUNeedlesV2.aspx?linklist=AN%3bBQ%3bH6%3bM1%3b


lift the piston out, if the needle is springy, then it's not fixed

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did I tell you that I won a trophy?

No need to lift it out, just lift the piston with 1 finger and wiggle the needle with another.

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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.