11 replies to this topic

[runkthepunk]

Hello

I have bought a used HIF44 Crab that was running on a stage 3 head 1275cc i believe.

So presuming its jetted and set for use on this engine what will happen when i fit it to my standard 1275cc unit?

Can I make it so it will work to a decent enough level to get around in the car or will i need to get a new needle/jet first?

I ask because my HS4 is in a bad way but it may be able to be fudged for a little while whereas if I remove it i am pretty committed to fitting the HIF44

Thanks

Rob

Edited by runkthepunk, 12 February 2009 - 12:58 AM.

[stormintrooper]

you do know the equivelant of the HS4 is the HIFF38?

[runkthepunk]

you do know the equivelant of the HS4 is the HIFF38?

everyone told me to buy a HIF44 for a 1275cc with a stage 1 kit

does anyone have any idea about my original question?

Thanks

Edited by runkthepunk, 12 February 2009 - 09:10 AM.

[jaydee]

you do know the equivelant of the HS4 is the HIFF38?

everyone told me to buy a HIF44 for a 1275cc with a stage 1 kit

does anyone have any idea about my original question?

Thanks

will work fine, do u no which needle its coming with? maybe u'll need a BBW needle for a 1275 with a stg 1 kit.
this online guide would be helpful:
http://www.mintylamb.co.uk/suneedle/

If the carb was fitted on a stage 3 head, u'll probably need a different jet/spring

[runkthepunk]

you do know the equivelant of the HS4 is the HIFF38?

everyone told me to buy a HIF44 for a 1275cc with a stage 1 kit

does anyone have any idea about my original question?

Thanks

will work fine, do u no which needle its coming with? maybe u'll need a BBW needle for a 1275 with a stg 1 kit.
this online guide would be helpful:
http://www.mintylamb.co.uk/suneedle/

If the carb was fitted on a stage 3 head, u'll probably need a different jet/spring

Thanks for that,

Apparently the Needle in the carb is AAA I think this needle should be fine for the set-up I have (probably run rich if my understanding is correct). But how much of an effect will the jetting/spring have? and can I adjust it a fair bit?

I just wanted to make sure if i fit the carb as it is I will be able to tweak it enough to get the car running in a decent-ish state so I can get to a tuning session. the HS4 is damaged and is leaking so don't want to drive too far with that one on

Cheers

Rob

Edited by runkthepunk, 12 February 2009 - 04:55 PM.

[runkthepunk]

I know the needle in the HIF44 is an AAA

from my understanding the 'A' designated needles are for the smaller carbs HS4 HIF38 etc

So what would be the reason to run this needle in the HIF44?

and will I be okay with this in a 1275cc with Stage 1 kit?

The carb is being sorted this weekend so would like some input

thanks

Rob

I do have a couple of spare needles: ABP and AAU and another which I don't know just yet

Edited by runkthepunk, 13 February 2009 - 10:28 PM.

[lrostoke]

Just thinking out loud here, but I would think all of those needles would run massively rich in a HIF44.

The actual jet would be bigger than they are designed for.

Are you sure its a 44 and not a 38 ??

Edited by lrostoke, 13 February 2009 - 10:37 PM.

[runkthepunk]

Just thinking out loud here, but I would think all of those needles would run massively rich in a HIF44.

The actual jet would be bigger than they are designed for.

Are you sure its a 44 and not a 38 ??

Hello yep pretty sure its a 44 the guy i bought it from was running it on a stage 3 head and he's told me the needle in it is AAA

I think you are right though about them running rich as when I looked into needles I read that all the A needles are for smaller carbs the B needles are for the HIF44

so what do you think?

[lrostoke]

I suppose its possible for it to run, but be no good for getting any proper tuning done

This is what Haynes specifies for the 1275 Cooper fitted with HIF44

Mini Cooper, 1275 cc, (12A) 1990-on
Carburettor type . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . SU HIF44
Piston spring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Red
Jet size . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.5 mm
Needle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . BFY

So you might be as well getting a BFY needle to start with, but also measure the carb make sure its 44mm across the main hole which bolts to the manifold.

Edited by lrostoke, 13 February 2009 - 11:04 PM.

[runkthepunk]

Thanks for that,

good advice i will try and source a needle from Moss tomorrow morning and obviously measure the carb to check it is what it supposed to be.

Rob

[Kam]

My Hif44 with a stage 3 head runs on a BCE needle, thats what was recommended by the tuners from there experience with them. I'd be surprised if that 44 you got was running well on a AAA needle stuck on a stage 3 head.

Book it in for a rolling road for them to set the carb up properly, aslong as it starts and the journey aint too far it'll be fine to get there.

Save some pennies aside for buying the correct needle from them, maybe some plugs aswell depending on how far you needed to drive.

[runkthepunk]

well I have found out the carb is a HIF44 thats for certain but i have also discovered that:

The bore on the Howley inlet is smaller than that of my minispares inlet manifold

The bore on the mounting plate for the K&N cone is smaller than the carb hole

I presume this will cause problems with airflow and probably explains why the guy before me was running a 'AAA' needle to keep it rich

can someone confirm that running smaller bores components into the HIF44 is a problem and what's the solution

Thanks

Rob