SU carbie spacers.

my 1 1/4 carbie has a half cm spacer between the carbie and manifold, without this, the manifold bolts hit the carbie body and you cant tighten it up (there is a half cm gap between).

i have a 1 1/5 carbie, there is about say 4 cm of thread on the manifold bolts, and these are hitting against the carby body, there is about a 3/4 cm gap between the carbie and manifold at this point (I dont have a spacer)

Do i need a spacer??

why are the manifold bolts so long??

Could i instead just saw 2cm from the thread and bolt it up with no spacers, or does the spacer provide some other purpose??

The spacer adds some volume to the manifold (and clearance behind the throttle plate) and this improves airflow.

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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.

Thankyou for your prompt reply Dr :)

What is the width of 1 1/5 SU spacers ?

I might need to get one laser cut.

I would say 10mm or more?? (ii havnt got one to look at)
Or does anyone have one i can have? :D

I would guess the 1-1/2" one is 10 or 12mm thick.
Hey, any Mini joint would have these S/H, they are alloy...

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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.

but any mini joint charges me a fortune!!

Ok this plate wasnt too bad, the gaskets wernt exactly cheap though.

So i have purchased it, does anyone have any engine bay pics of their own 1 1/2 carb on manifolds so i can ahve a look.

My air filter is mounting facing the opposite direction to the front of the car (the spout that the 1 1/4 filter mounts on is not on this 1 1/5, is this normal)

I would thinkmounting it here would be very bad for air flow +its in the way of my speedo cable!

It also appears as if this carb is a mirrored one?


anyway, any pics of 1 1/5 in engine bay if you could thanks!