Magunson Supercharger - Defender Source
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  #1  
Old October 19th, 2008, 11:13 AM
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Byron Straw
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Magunson Supercharger

I bought this in working condition all parts there and am not sure I want to use it. Main reason it is set up for a serpentine belt system and I have the v belt system. Also I am looking for better gas mileage and not sure this is going to do it. Anyone have a realistic idea of what this is worth? Any Help would be greatly appreciated and I thought I would ask here before I posted in the For Sale section.
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  #2  
Old October 20th, 2008, 10:38 AM
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Is it set up for GEMS or for 14CUX? What was it on originally?
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Old October 23rd, 2008, 01:30 PM
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bart
anyone moves..... #238 sold
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Quote:
Originally Posted by bstraw
I bought this in working condition all parts there and am not sure I want to use it. Main reason it is set up for a serpentine belt system and I have the v belt system. Also I am looking for better gas mileage and not sure this is going to do it. Anyone have a realistic idea of what this is worth? Any Help would be greatly appreciated and I thought I would ask here before I posted in the For Sale section.
superchargers dont give you the option to "stay out of it" like a turbo does, so im guessing better mpg aint gonna happen. more air at all rpms means more fuel at all rpms, whether you need that power or not. that having been said, if youre at 12mpg stock, whats 10 or 11 matter? toss it on!
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Old October 23rd, 2008, 01:36 PM
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BRYAN
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I actually got better mileage in a toyota after I installed a trd supercharger-made it a more efficient air pump!
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  #5  
Old October 23rd, 2008, 02:52 PM
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Don't use it. Sell it and buy some useful mods for your Defender.
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Old October 23rd, 2008, 03:13 PM
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Quote:
Originally Posted by zimm
superchargers dont give you the option to "stay out of it" like a turbo does, so im guessing better mpg aint gonna happen. more air at all rpms means more fuel at all rpms, whether you need that power or not. that having been said, if youre at 12mpg stock, whats 10 or 11 matter? toss it on!
Most systems have inlet side bypass valves that open at light throttle settings, essentially venting the boost pressure that is not required back to the inlet side of the supercharger. This takes care of the problem of having to dump more fuel all the time, but since a supercharger is always being spun by the crank (unless you take the movie approach and have a switch for your supercharger ) , it is always putting an increased load on the engine, and therefore requires more fuel to support that additional load (though it is minor).
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Old October 25th, 2008, 10:20 AM
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bart
anyone moves..... #238 sold
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Quote:
Originally Posted by jeepeytr
Most systems have inlet side bypass valves that open at light throttle settings, essentially venting the boost pressure that is not required back to the inlet side of the supercharger. This takes care of the problem of having to dump more fuel all the time, but since a supercharger is always being spun by the crank (unless you take the movie approach and have a switch for your supercharger ) , it is always putting an increased load on the engine, and therefore requires more fuel to support that additional load (though it is minor).
i think read 13%+/- for the efficiency difference between a turbo and supercharger. being the drag is a coefficient of friction on the accessory system at all times im guessing its significant, and will cost you 13% at low rpms, where the supercharger isnt in its ideal airflow range.

is that kit a turbo vane style or a eaton unit? back in the stangbanging days, the eatons produced a steady 8psi from a low rpm where the paxtons and vortecs had to spool up. the eaton units were more pratical for day to day, stoplight to stoplight, but lacked topend.
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Old October 25th, 2008, 08:06 PM
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Quote:
Originally Posted by zimm
is that kit a turbo vane style or a eaton unit? back in the stangbanging days, the eatons produced a steady 8psi from a low rpm where the paxtons and vortecs had to spool up. the eaton units were more pratical for day to day, stoplight to stoplight, but lacked topend.
I believe it is a twin screw Whipple design..
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