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| SU question https://ausmini.com/forums/viewtopic.php?f=5&t=38439 |
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| Author: | wyan [ Tue Dec 04, 2007 7:57 pm ] |
| Post subject: | SU question |
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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| Author: | Mick [ Tue Dec 04, 2007 8:18 pm ] |
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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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| Author: | wyan [ Tue Dec 04, 2007 8:27 pm ] |
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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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| Author: | TheMiniMan [ Tue Dec 04, 2007 8:52 pm ] |
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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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| Author: | spraycanmansam [ Tue Dec 04, 2007 9:16 pm ] |
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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  ). On that note I have seen it done  You wouldn't catch me near it... 
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| Author: | Moke'n'Andy [ Wed Dec 05, 2007 5:09 am ] |
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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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| Author: | wyan [ Wed Dec 05, 2007 5:00 pm ] |
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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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| Author: | Asphalt [ Tue Dec 11, 2007 4:27 am ] |
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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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