Hullo,
Steve Adderson (who I managed NOT to delete) wrote:
> I'm looking for carb suggestions for my 1275cc Mini. It's got a 1275 GT block
> with a gas flowed Cooper head (std valve sizes). I think that the GT came with
> HS4s is standard form but I was thinking an HS6 would be more appropriate.
> Trouble is I'm on a budget and HS6s aren't very common (compared to HS4s) down
> the scrapyard. Could I get two HS4s and make up my own linkages etc to make a
> twin-carb? Has anyone else done (or tried) this. The problem I can see is that
> the float chamber will be on the 'wrong' side on one of the carbs but I havent
> been able to look at one 'on the shelf' so to speak to see if this will really
> be a problem.
You would probably be best with either a single 1 3/4 or twin 1 1/4, I
think twin 1 1/2 would be more carb than you could use.
You can pick up a 1 3/4, plus alloy manifold plus K+N for about #70
second-hand. Check out some adds in Mini World. Similarly twin 1 1/4 are
also not too bad second hand.
If you are determined to go for twin 1 1/2 and to fabricate your own
linkage, then Vizards "How to Modify Your Mini" has a bit on how to DIY.
You would still need a manifold for them though.
I can't remember if the 1275GT has a separate inlet and exhaust manifold,
otherwise you are looking at a new exhaust manifold too. LCB ones are
apparently the ones to have.
> Whichever carb I get I suppose a spell on the rolling road is in order to
> select the correct needle and ignition timing.
Most definately.
> In a similar vain my '66 850cc only has an HS2, would it be beneficial puttin
> a 998cc head and HS4 carb on or will I run into problems with needle selection
> and timing? I don't wan't to put a larger engine in for my own reasons.
I can't remember if the head is a straight swap - if I remember I'll look it
up. Certainly put the 1 1/2 on it. I think you may need to swap the
manifolds too. Again, take it to a rolling road.
While I'm here - could someone explain in SIMPLE terms (ie simple enough to
be understood by someone who can just about work out which the business end
of a screwdriver is (I don't know what a cheese danish is though?)) what
the difference between rockers and roller-rockers is (no jokes about
leather jackets and motorbikes please :-)
Daniel.
|