Was processing some pics from last summer this morning and found this guy. What is the thought flow behind siamese blowers. I know some cars use a small/big turbo to try and offset power band inequalties, but have no idea about the dual blowers, is just to do something different?
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That's the old Magnuson unit. I believe the idea was to have the capacity of a GMC-type blower
in an under-the-hood package, when used with two Weber DCOE sidedraft carbs. These came out
in the early-to-mid 1980's. They bolt on to a standard 4V Holley flange pattern intake manifold.
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Wouldn't smaller mass spool up faster? So if two smaller ones moved the same amoumt of air as one large one, wouldn't they spool up faster?
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It's a Hoosier thing, you wouldn't understand...
Well, since these are belt-driven, I don't think "spool-up" is the correct term. In any event, theventman
Wouldn't smaller mass spool up faster? So if two smaller ones moved the same amount of air as one large one, wouldn't they spool up faster?
weight of the impellers is nowhere near the weight of the crankshaft & flywheel. I don't see the
weight of the impellers significantly affecting how quickly the engine revs.
Originally Posted by KenK
Yeah, I was thinking of exhaust driven turbochargers, not superchargers.
The amount of air moved by the blower can create a huge amount of resistance...it's estimated the blower on a top fuel/funny car engine uses about 1,000 HP of the engine's power.
The Whipple quad rotor blower system is popular in big power boat engines...
True. No free lunch.The amount of air moved by the blower can create a huge amount of resistance...it's estimated the blower on a top fuel/funny car engine uses about 1,000 HP of the engine's power.
Since this is a street rod, I would think that it's more about visual impact rather than making horsepower. If you want to make maximum horsepower, you need to make sure that you have sufficient air flow all through the rev range. I think it would take an awefully big engine to need more air flow than an 8-71 could put out.
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