Needle choice

R

roverrocket

Member
All,
I have gone antisocial and fitted ram pipes to my HS8s. Naturally I now need richer needles from my current AAA. However, Minty Lambs' compare-o-rama (http://www.mintylamb.co.uk/suneedle/) lists this needle as 0.09'' and for HS4 and HS2s. Further, I was hitherto under the impression that HD/S8 carbs use a 0.125'' needle coded as UV, UM, UE, UL, and UO. Sure enough, these are listed in the 2'' carb section of Minty Lamb.
Anyone clarify? Also can anyone suggest a suitable needle for the filter arrangement I have (socks) Thanks as ever
 
AAA is not an HS8 needle. Is it definitely what's fitted? I can take a needle and find you the next richest up for instance, but as the 4 pot doesnt have an engine selection in this program it wont help much without a starting point. If not do you know what the car should have as standard?

Thanks,

Rich
 
Yes I definitely have AAA needles for sodding 1.5'' carbs! In the service history I have a receipt for needles and a service kit from 2012 - the car runs like Richard Griffiths and you might have expected the previous owner to make the link after the swap!
Hey ho hopefully this concludes the investigation. The standard needle is UM I think and I'm leaning toward a richer UE on account of ram pipes and socks. Does your program suggest much using a generic 4 pot option Rich?
 
roverrocket said:
Yes I definitely have AAA needles for sodding 1.5'' carbs! In the service history I have a receipt for needles and a service kit from 2012 - the car runs like Richard Griffiths
Click to expand...

The Late, always Great Richard Griffiths.
 
I'll try that for you. sorry - only just spotted your reply!

It can also tell me the closest needles to UM that are richer so i can give you a range to try.

TBH, i'd try the standard UM first and see if under acceleration it goes better when you pull the choke out a little. You then know that richer is the way to go or otherwise :)
 
Assuming AAA as on the other thread the next one up is RLB, however given this is a 4 cylinder engine I think you need to get busy shimming before you try anything like this. If the valves arent opening then putting more fuel in is going to have odd effects - especially when it's different on different cylinders.

Also, I'm not sure the big air filters are a good idea on an hs8 2000tc. The tc motor suffers from being too free flowing on the carbs which leads to poor idling. If you look it up you should be able to find a thread with a conversion to hs6. Was either Dimitris or micheal from memory. If you had an hs6 the larger filters might make more sense, but seems wrong to do this on the Hs8s. Anybody else have any thoughts on this?

Rich.
 
You must log in or register to reply here.
Back
Top