N/A HIF44 Conversion using AUE825 seal kit
Turbo Mini Forums

Hello all,

A common topic that has a default/accepted answer - buy the rebuild/service kit.

But I have a HIF44 which was recently serviced so doesn't need all of the components in the service kit. The above part number is listed as a seal kit and the response I got from Burlen was 'it contains everything' (gaskets, o-rings and spindle seals).

Additionally the image from 'Southern Carburetters' does show quite a comprehensive kit:



Has anyone used one of these kits? Does it contain the required parts for the conversion?

what conversion?

n/a - turbo?

you dont NEEEEEDDDD anything if you run the T piece bypas

Yes i moved to the darkside

Instagram @jdm_brett

Just went through this, I agree it's a little confusing. There isn't anything special in the rebuild though some people are particular about the orientation of the throttle spindle seals.
It is important that you do the T-Piece or drill the passageway. I ran into lots of issues because I didn't do either. I recommend drilling, it's pretty easy as it's nearly already drilled and looks much cleaner.

Yes i moved to the darkside

Instagram @jdm_brett

I really just wanted to try and capture the minimum requirements for using an N/A carb. It would seem it shakes out as the only real requirements are that it's plumbed in as per the diagram and that a restrictor is present somewhere in the intake so that the float can be pressurised from a pre-restriction connection (producing the required differential between the float bowl and the bridge).

The extra parts provided by the rebuild kit are a 'nice to have' if the carb is healthy and the dashpot will likely be sealed without any additional work although some sealant or a thin gasket will ensure the seal is good.

Is that a fair summary?

Spot on mate, the restrictions pre carb in the plenum is fairly specific
I would try to use a plenum as its already sorted
I think some members experimented with a pitot tube
But I never looked into it

Yes i moved to the darkside

Instagram @jdm_brett

Great, just the confirmation I was looking for!

I will be experimenting with a DIY plenum as I'll also be experimenting with a 38 but I have a 44 as a fall-back if I can't come up with a usable solution.

The hif38 is the same as a turbo hif44
Plumbing wise from what I have seen the hif38 i had even had the part throttle lean off pipe connections the turbo hif44 has

Yes i moved to the darkside

Instagram @jdm_brett

Yes, pretty much the same. The only significant change is that there is only one feed into the dashpot chamber from the filter side of the carb. The other opening is what will become the float bowl pressure feed. (So it has 2 openings rather than the 3 on the 44).


The one area that could cause some interesting results is the tapering of the bore within the body. The opening on the engine side is 38mm while the air filter side is only 35mm. I've not got to the bottom of that one yet.