whiz
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| posted on 14/5/16 at 11:33 AM |
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Supercharging ST170 in a Zero
Hi guys I will be supercharging my ST over the next winter. I have sourced a MP62 from a SLK. So I'm looking for ideas for an intercooler that
will fit either in the nose cone in front or on top of the radiator, also I'm going to be using my Jenveys hopefully or a plenum with multi
point injection.
whats your thoughts.
Whiz
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garyt
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| posted on 14/5/16 at 01:03 PM |
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hi I used a vw Passat intercooler and fitted it sloping from radiator top to underside of nosecone on my s/c setup, pictures in my archive.
hth Gary
remember we are not mad just creatively insane !!!!!
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bi22le
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| posted on 14/5/16 at 08:47 PM |
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Im sure garyt's positioning works fine for him but I would not advocate that orientation.
Generally you want the intercooler infront of the water rad perpendicular to the air flow. Add a cowling to crowd the air through the cooler and leave
no gap between it and the water rad.
Have a search on here. There have been some good set ups demonstrates in the past.
The cheapo top feed ones from ebay got good feedback
Also I know an uprated MR2 mk1 worked well for 280bhp on my car.
Track days ARE the best thing since sliced bread, until I get a supercharger that is!
Please read my ring story:
http://www.locostbuilders.co.uk/forum/13/viewthread.php?tid=139152&page=1
Me doing a sub 56sec lap around Brands Indy. I need a geo set up! http://www.youtube.com/watch?v=EHksfvIGB3I
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jambojeef
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| posted on 15/5/16 at 01:23 PM |
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Hi wiz,
Lining up your radiator with the air flow isn't really the most important factor in dissipating heat from your intercooler, espesh in a 7.
In fact turbulent, slow (to a point) flow through a radiator / intercooler core is more efficient at transferring heat to its surroundings.
As with many things in 7s, especially in the nose, packaging is going to heavily factor unless you don't mind the look of modern 7esque
interpretations like Donkervoorts and Daxs in which case you can place radiators / intercoolers in pods and lumps and bumps and optimise airflow
without worrying too much about the look.
After I turboed my 7 - my own personal take on it is: Pick a light, good sized intercooler in budget and do your homework as to fin, plate, bar
construction and pressure drops and fit it best you can in the nose with some kind of seal to the inside of the nosecone - expanding foam / aluminium
/ composite / plastic. Then imagine air flow paths, not just exposure to frontal area. If you have no air exit path, pressure builds in the nose as
road speed increases and once that pressure is higher than the air pressure either side of the nose, approaching air simply flows around the side of
the nosecone and your intake / water temperatures may rise quite quickly.
Ranked in order of best cooling, I tried these:
1) Flared Side Panels
2) Traditional Bonnet Louvres
3) Side pods and ducting
There'll be other methods but you'll have to decide which is the acceptable compromise between all those 7esque car building factors!
Post up pics of what you go with 
GEoff
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jambojeef
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| posted on 15/5/16 at 01:30 PM |
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Forgot to add my solution - S3 / 225bhp TT / Cupra intercooler with custom carbon ends, flat floor and traditional louvres in the bonnet.
I did make an alloy scoop to direct flow over the engine to the underside of the louvres but i think i left it off in the end.
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