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 Post subject: SU question
PostPosted: Tue Dec 04, 2007 7:57 pm 
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848cc
848cc

Joined: Tue Nov 06, 2007 8:25 pm
Posts: 138
Just a quick question, if su's work under vacume will they still work normally if set-up as a blow-through forced induction? I have seen suck though set-ups, but can they work with an intercooler, or will the intercooler mess about with the fuel/ air mixture or anything?
Thanks!


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 Post subject:
PostPosted: Tue Dec 04, 2007 8:18 pm 
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SooperDooperMiniCooper ExpertEngineering
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Location: Under the bonnet son!
There are blow through set ups used from the factory on Metro Turbo engines. These can be found and no further mods are required to use them.

I think normal SU's can be modified to run with boost at a cost.

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 Post subject:
PostPosted: Tue Dec 04, 2007 8:27 pm 
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848cc
848cc

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yeah Im in the process of getting one of a metro turbo from the UK. Is it the HIF6 or the HIF44 off a metro turbo? and do you know if n/a metros used the same carb as the turbo ones?


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 Post subject:
PostPosted: Tue Dec 04, 2007 8:52 pm 
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Bimmer Twinky
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Location: Brisbane
The factory turbo specific SUs had sealed shafts, balanced breathing to the float bowl & linkages were on the opposite side of the carbs than the "usual" possition i believe (that may not allways be the case tho as people can "play" with that part of it quite easilly & change things around to suit "their own" application)

& yes, you can intercool it all before/prior the carb

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Last edited by TheMiniMan on Tue Dec 04, 2007 10:10 pm, edited 1 time in total.

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 Post subject:
PostPosted: Tue Dec 04, 2007 9:16 pm 
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Forum Graffiti
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IIRC the turbo Metro's used a boost modified HIF44.

Intercooling a blow-thru setup is fine, but NOT a suck-thru setup. The fuel pools in the intercooler and you basically end up with a bomb waiting to explode ( backfire = dead :evil: ). On that note I have seen it done :shock: You wouldn't catch me near it... :?


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 Post subject:
PostPosted: Wed Dec 05, 2007 5:09 am 
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848cc
848cc
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Location: Mountain Creek, Sunshine Coast QLD
I have just set a blow through on a HIF44 metro turbo.

http://moke.com.au/Forum/index.php?topic=1858.0
This is a link to the moke forum with some of the latest pictures.

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 Post subject:
PostPosted: Wed Dec 05, 2007 5:00 pm 
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848cc
848cc

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yeah thats what I thought would happen with a suck thru-intercooled set-up, Im going for my origianl plan of a blow-through intercooled, which is good as I have all the parts already (besides my carb..) so they wont end up as dust collectors haha.


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 Post subject:
PostPosted: Tue Dec 11, 2007 4:27 am 
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998cc
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Other suck-through issue is the vacuum in the turbo at part-throttle.
If it has no special seals, it`l draw the oil out of the bearings.

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