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Old 04-28-2012, 07:26 AM   #1
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This is the one off eBay correct?

Out of curiousity, how much did he let it go for?
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Old 04-28-2012, 07:52 AM   #2
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You have seen it I guess? I finally bid $1400 and he accepted.
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Old 05-06-2012, 01:34 PM   #3
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Does anyone have any instructions manual for any supercharger kit sold for a boxster. The Magneson SC I ordered is here sans instructions. Although the instructions written by ohioboxster (Supercharger Installation!) are excellent, I have a few questions that Im hoping the manual may resolve.
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Old 05-06-2012, 03:09 PM   #4
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it's not custom, it's a kit by tpc (check the sc build thread on this site). if everything you get is in the pictures then it's missing one of the mounting brackets; tpc can fabricate you a new one. also, it's designed to work with a 7th injector which means you need a piggyback computer to operate it. tpc may be able to provide you one. if you want to do a tune instead you'll have to remove the 7th injector and put larger injectors in the stock positions. softronic should be able to do the tune for you. if you seach this site you'll also find that brad roberts has dealt with a lot of these as apparently the mounting position starves the sc of oil; regardless, you should send the unit out to be refurbished. you'll probably also want to put in the latest edition of the aos in your car, as the unit draws vacuum from before the sc. so failing aos will send a whole lot of oil through the sc. you'll also want to think about fabbing a heat shield or wrapping/coating your headers, as the sc sits right close to them. if you want your engine to last you might also want to think about fitting an intercooler in there someplace, otherwise you're slamming hot air into an engine with poor air/fuel control given the 7th injector design - boom.
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Old 05-06-2012, 05:45 PM   #5
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Thanks radium

So TPC just buys magneson SCs and then sell them on as a kit for the boxster I take it. I'm a bit confused on a few points. What is the extra bracket for? I have found the spot where the SC will sit and I've tried to imagine how it will all fit together. The 7th injector you mention has me at a loss. I've heard of this configuration being used before but I can't get my head round it. If there is one injector per cylinder where does the 7th go? I assume the mixture needs more fuel than the stock injectors can cope with? But this injector is not injecting into a cylinder right?

The next question i have for you is about the oil. You mentioned a vacuum failure that would send oil to the SC. I'm not sure how as it's a sealed unit. Did I misinterpret and you are referring to a catastrophic oil failure?

As you can probably tell I'll feeling like I've bitten off more than I can chew here but I'm willing to see this through, at least at this point.

So whats your connection with radium if you don't mind me asking?
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Old 05-06-2012, 07:09 PM   #6
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in the small town up north where i lived there was a tug called the 'radium king' that sat at the locak museum. it was used to haul barges loaded with yellowcake uranium from great bear lake during ww2 to evenually be dropped on japan in a more condensed form. it became the name of our band and my online moniker.

if you check most sc companies sell to other companies and not to end users. maggie is just a rebranded eaton, sold to tpc for their kits.

if you look at the first images posted in ohioboxster's thread, you'll see one of the sc itself, and one of a pile of misc parts. in the misc parts image you'll see a black metal bracket sitting under a baggie; that's the second bracket required to secure the rear of the sc to a second pair of header bolts. note also that you'll have to get longer threaded studs w/ nuts to replace your current header bolts to attach the brackets.

in the first image you posted you'll see the piping with flanged fitting designed to bolt to the intake plenum. just back from the flange you'll see a thing with a small hose attached to it - that's the 7th injector. it ties in to the fuel supply and is controlled by a little piggyback computer that takes an rpm signal from the car and a vacuum signal from the vacuum system. when the car is hauling (ie, high rpm, creating a vacuum) it adds additional fuel to the intake air. you'll need to get this controller from tpc. note that the 7th injector approach is, ihmo, half-a$$ed and destined to kill your engine fast. there's no intercooler so intake air times are way up already (contributing to detonation). your car's computer doesn't know wtf is going on and is trying to rationalise how much fuel it thinks the car is getting against what it is seeing in the exhaust and modifying itself accordingly. lord knows whether it can properly compensate timing. air/fuel ratios are imperfect to say the least, etc. a great opportunity to run lean and burn holes through pistons. poor. better to delete the 7th injector, get 6 bigger injectors, and work with softronic on the tune.

there are two oil issues. one is that scs are typically self-lubricated. that is, they have a small reservoir of oil designed to keep bearings cool and happy (unlike turbos which typically use engine oil for this purpose). brad roberts has advised that the orientation used by tpc is not optimal for the maggie internal oiling system, leading to premature failure. poor. you can't fix how it is mounted, you can accept the need to repair it more often, and you should send it out to get rebuild.

the other issue (and not a big one) is that the boxster is designed to have vacuum in the crankcase. it gets this vacuum from the intake of the car. the car's air oil seperator (aos) is the interface between the crankcase and the intake; it passes the vacuum from the intake to the crankcase, vents crankcase vapours into the intake to be combusted in the engine, and stops crankcase oil from slopping into the intake. the boxster aos is a known failure point; it's not a matter of if but when. later versions of the aos have been improved, but if you have a 2.5 you have an early one and should change it. on the tpc kit the aos connection to the intake is pre-sc, so an aos failure will send oil and crap into your sc. note that tpc solved this problem by using a catch can instead. that is, any car with a newr tpc turbo kit doesn't have vacuum in the crankcase (bad for the rings) and is venting the crankcase to atmosphere (bad for the environment) and catches any sloshed-up oil in a can prone to overflowing (bad for the track). poor.

Last edited by The Radium King; 05-06-2012 at 07:24 PM.
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