Hey guys i have a 998 with
High lift cam
Ported and oversize valves..
Extractors
Knn filter
sc12 supercharger kit

Just wondering what needle and jet would i try for using on the hif44???

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My rides-74 fj40
74 clubman hopefully rego'd soon....
and 76 clubbie van!! - Ratschite after what i found what it was covered in when i found her...
http://photobucket.com/albums/b44/minimechanic/?sc=1

We can't tell you! You'll need some dyno time. If this is the Ben Afford kit, on the sheet he gives you with it the last thing on the 'how to' says 'go to dyno' or something like that. I spoke with him in person about this, and he said that dyno time is pretty well a must.

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1964 Morris 850, 1330 Supercharged - 81.8hp atws.
1975 Leyland Mini S 1100S powered - Nice and reliable.
1977 Leyland Mini LS - Project LS-T

yah i was thinking E3 until you said supercharged

go to the dyno, hand over the green

Can't give a definate needle size but I have measured a needle from a relativly standard SC 1275 may give an idea as what size for a start. It is a custom needle so numbers on it don't mean anything and best way is to look up in a needle book and find something close. The needle is about 44mm long. measurements are in thousands of an inch and measured about 2mm apart down the needle.
1- .091
2- .089
3- .088
4- .087
5- .085
6- .083
7- .079
8- .077
9- .073
10- .068
11- .062
12- .057
13- .054
14- .051
15- .049
16- .047
17- .045
18- .043
19- .040
20- .038
21- .035
22- .034

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4efte powered Clubman
supercharged 998 race car

hey dude

can you pm me the details of the super charger please?

might be doing this

the neddles i have now are h6 ones atm

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Davey...where abouts are you located in Adelaide?

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1964 Morris 850, 1330 Supercharged - 81.8hp atws.
1975 Leyland Mini S 1100S powered - Nice and reliable.
1977 Leyland Mini LS - Project LS-T

PM sent mate

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mmm i was just hoping to see what some people are running with their kit just to get a rough idea so it will run ok until it gets dyno'd..
no worries anyway...
and yes i will be running bens kit...

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My rides-74 fj40
74 clubman hopefully rego'd soon....
and 76 clubbie van!! - Ratschite after what i found what it was covered in when i found her...
http://photobucket.com/albums/b44/minimechanic/?sc=1

Try a metro turbo needle...... gotta be "roughly" close to get you running ...... as a starting point only...... then you can get it to your dyno guy !

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62 Saxon Green 850
Clubby van

After Googling SU needle Chart found some needles that may be OK to Start with
DB needle goes from 090" -036"
CS1 Needle goes from 090"-048"
CS2 090"-044"
BB4 090"-046
The last 3 are leaner so probably better for 998-1100"

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4efte powered Clubman
supercharged 998 race car

Interestingly I have been looking into needles recently. I have my car setup at a rolling road and at WOT its great showing an AFR in the low 12's/high 11's using a tech edge wideband via a pipe sniffer.

I have measured my needle using the SU station ID which is about every 3mm
I'm running a 998 SC12 12G295 and 1.5 rockers 8.7:1

The three figures are from left to right SU station No / measurement in mm and then measurement in inches.

My car does suffer from a lean out (17-19 AFR)when going from cruising to WOT and can stall when coming off of WOT to a stop. I think the needle needs work at idle and the cruse stations.
I have been looking for a close needle to mod myself and then check the results with my techedge wideband pipe sniffer.
Looks like a BCG needle is close so should only need a bit of fiddling.

1 2.47 0.097
2 2.47 0.097
3 2.37 0.093
4 2.31 0.090
5 2.23 0.087
6 2.04 0.080
7 1.89 0.074
8 1.69 0.066
9 1.51 0.059
10 1.34 0.053
11 1.20 0.047
12 1.12 0.044
13 1.06 0.042
14 1.00 0.039
15 1.02 0.040
16 1.02 0.040

I have plotted bens needle above my current one and the bcg

as you can see Bens is richer all of the way through up to WOT. Anyone else running an SC12 kit got any data we can all share?

I found a heavier spring helped the lean out issue. Otherwise I usually don'
t go from crusing to wide open, give it a little bit then **** open seems to work better. Mine used to stall but after it was tuned and it stopped. I did fit a butterfly with a spring loaded valve in it from a Range Rover. It's part of the Rangie emmission system but according to my tuner lets the revs come down slower as it opens on deceleration. But I'm not sure if this is the reason it doesn't stall.

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1964 Morris 850, 1330 Supercharged - 81.8hp atws.
1975 Leyland Mini S 1100S powered - Nice and reliable.
1977 Leyland Mini LS - Project LS-T

I use a BCJ i think - I will have to double check. But it is on a Hif6 1275 (1100s engine) standard grind cam, 12g940 head - 8.3 pistons - Holley blue fuel pump & 7psi sc12 (home made kit)- Tech edge wideband kit. I haven't had enough time lately to tune but have given it one run up the road since tech edge install and i am reading stoich at high revs , rich at low revs and idle.
BCJ seems a crap load leaner than your BCG?
Hope this helps

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1310 SC 1969 Morris Deluxe - 15psi boost
1293 1968 Morris Deluxe Miglia - 45 Weber
HSV Maloo Z Series - Comp Cam - 300rwkw
Ford DF LTD - 5Ltr

this is good reading so far. do you think most dyno tuning mechanics Should be able to get a good needle tune from a SC12 1100 even tho most deal with EFI car tuning? .edit. do u think it would be a good idea to Try a weber setup and hif44 setup and tune each and then decide what is better suited to ur driving? would a Weber setup be a bit easyer for the mechanic to tune in?

mm yes I have been looking at the old SU and tuning. IMO they are a bot over complicated for what they achive, by this I mean there is a lot of factors that effect the way they meter the AFR, Damper rates, spring rates, needle thickness, bi metallic strip...; not to forget they are all 20 years old and suffer a bit.

I think a good starting point is
1) Start with the best carb possible i.e no dodgy air flow mods to the body...
2) Give it a full rebuild so all of the parts possible are changed.
3) inspect the dash pot plunger for wear including the piston and dashpot body.

I got a new Old Stock so I had a new float and bimetallic strip etc. There is a useful mod on Turbo minis to replace the bi-metallic strip and make one out of standard steel one. To stop the mixture changing with the heat... (Something I will do for the next time the carb is off)

Its interesting to see that my car was setup on the other side of the world and the needle profiles are close to Bens 1275 data. I presume there is an effect of the charger that keeps the profile similar.

I used the following to measure my needle then searched an on-line data bases for needles that were close and that's how I found the BCG.
www.theiansons.co.uk/mini/suneedlestations.doc
Which looks a good starter if not a bit rich top end. I will hopefully give it a try this weekend with my tech edge kit. But it might be a good starter however you cant add the material at the bottom end if its too rich, but it does match the profile type.

I have found a guide that shows needle polishing http://www.turbominis.co.uk/forums/inde ... 59683&fr=0
but it seems a long process of removing very small amounts and the trying the car in different driving conditions.

I used this quick spreadsheet to look at the needles to see the differences in profile. you can changed the coloured squares with new data.
www.theiansons.co.uk/mini/needlecomp.xls