HIF38 fitting diagram

[moggiegeek]

Finally at the point of fitting all the good bits to re-built 1098!!!!
Having uprated brakes and suspension....
Following all the good advice I am fitting HIF38 with AAA needle, K+N filter, Maniflow inlet and exhaust, 12g940head with exhaust valve seats sunk to 320thou, sintered/forged rockers standard lift. Standard 1098 cam.
A Question..... On the HIF 38 there are many tubes - is there a diagram detailing which is which - ie fuel inlet, overflow, vacuum advance, efficiency device, breather, servo......... and which is the miuxture adjustment screw?
Please help - expecting a fun result when all installed!

[mike.perry]

Burlen Fuels Carb. Workshop Manual

[moggiegeek]

Thanks Mike - many spares lists but no diagram that actually names the respective tubes! I do recall a labelled diagram being posted in a link.
Looking at the carb from the right hand side
I think the bottom screw might be mixture, above that a brass tube - fuel inlet?
Just below the dashpot is fuel overflow?
To the right top is breather?
Does that sound right?

[bmcecosse]

Sounds right - I can't find that diagram for you right now. although it must be here somewhere....

[Declan_Burns]

Here's my diagram. I hope I have it right.
Regards
Declan[frame][/frame]

[MarkyB]

Vent on top right should be connected to the rocker cover breather.
Not visible because of dashpot is the connection for the vacuum advance.

[Declan_Burns]

Thanks Marky,
The corrected version[frame][/frame]
The vacuum advance[frame][/frame]
Regards
Declan

[bmcecosse]

EDIT!! I see now the upper connection labelled 'vent' and this should be open/extended. The tiny connection on the flange is not for rocker cover - it should indeed be connected to the lower connection as the economy feature - only present on later models of course. The large connection 'vent' is the one to connect to the rocker cover - or timing case cover if that's the only breather on the engine. Otherwise - top notch Declan!

[moggiegeek]

Thanks so much for all your hard work.
Point of clarification from above diagrams - I am now assuming small dia brass pipe on carb flange is a pretty insignificant breather and that the largest diameter tube ( labelled "vent" on Declan's photo) is in fact the breather from the rocker cover.
If so all will be well!!!!
thanks all

[bmcecosse]

Yes - that's right,

[Declan_Burns]

Edited[frame][/frame]

[Roni]

While you are setting up the carb it would be best to cap off "A" and"B". This will disable the part throttle economy circuit, which leans out the mixture at high vacuum and light throttle. Working out the correct mixture setting with this in operation would be hard.
When the mixture is correct, connect "A" to "B" and re-test. Depending on the car the carb came off the economy circuit may over-lean yours. On mine I needed to install a restrictor in the line to limit the effect.