I have a HS4 carb with the minisport stage one AAV needle.
maryQ1988 wrote: I was given a Haynes mini carb manual and they say tighten nut till jet is flush then give two full turns anti-clockwise but still no better
maryQ1988 wrote: I have swapped the AAV for the AAL and it seems to be running a little better with slightly more grunt but still terrible.
base point wrote:STG Needles with 1 1/2 carb
998 = AAA
1098 = AAU
1275 = AAM
maryQ1988 wrote:Can anyone recommend a rolling road in the North East? I know there's A19 tuning on the way to Sunderland (I live in Middlesbrough) but i dont know anyone whos been there. Local club meeting this wednesday so i will put it out there.
="maryQ1988"]I was looking on the Minispares website at needles and it actually stated "The AAU needle best for stage one kit" so i dont know why the hell Minisport gave me the AAV.
andy3lliott wrote:i had the same problem didn't i 'minimaniac' they sent me aav
Zippyrude wrote:These mistakes are potentially quite serious. If you had a newly built engine, an incorrect needle could wreck it in only a few miles !
maryQ1988 wrote:If the needle isnt the right one do you suggest i run the car concervativly so not to damage it too much?
Thank you for your email, and the information supplied, I will look into this and speak to Rob about it.
Hope this is acceptable, and I will let you know as soon as possible.
Very best regards,
ACDodd wrote:I can't believe that I am still saying this after all these years.
After ANY modifications to an engine it NEEDS to be rolling road tuned to optimise both the ignition timing curve and the fueling to get the best from it.
If you want the best from your engine and any mods, roller it.
People forget, There are 4 items that need to be calibrated properly for an SU to fuel an engine properly,
1. Correct Piston Damper,
2. Correct Piston Spring,
3. Correct oil Viscosity,
4. Correct needle.
All these must be correct if you ant the engine to run efficiently at all speeds and throttle openings.
In my experience with rolling road tuning ST1 minis in the UK the AAA needle is too rich and the AAU is too lean at part throttle.
You normally need a custom needle to fuel these properly. Use a RED spring (Standard) and and 8103 Damper. The oil is down to testing on the dyno.
Further to our email on Tuesday, apologies for the delay in getting back to you, however, we would advise as follows.
We have used AAV and AAF needles on 998 stage 1 kits for twenty years and more. The fuelling is only theoretical, but based on rolling road tuning we have carried out. However, it is dependant on the condition of the carburettor, in particular the condition of the throttle spindle and carburettor body.
We hope that this information is of assistance, and if there is anything else we can help you with, please do not hesitate to contact us again, when we will be only too happy to assist in any way possible.
Very best regards,
Users browsing this forum: paulsv24 and 6 guests