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Cheap supercharger kit

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Old 07-09-2010, 06:30 PM   #1
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Default Cheap supercharger kit

Abridged build thread

I completed the LSx swap into my 3rd gen and while its alot faster than the old 305, its still not quite there

Based on this setup in my 91 GTA

Basic mock-up

Simple tray fabbed

Trying to get the position so the hood will close

Basic wooden bracket. Wood is easier to shape than steel and is quite a bit stronger than cardboard

Just barely clears the hood

Steel bracket cut, setting square in all directions and setting pulley alignment

Angle adapter and scrap tack welded on to keep everything square

So far so good

Making sure the charge pipe will fit still

Flange cut

Beginning to shape the collector

Ground down several times looking for holes fixing them as I found them

Water test for the invisible leaks

It fits

Building the rear brace and trimming things down

Relocation bracket fabbed up

My original intake fits perfectly. Had to go billet rails to clear the feed fitting

Building the tensioner bracket. Stock tensioner may not be stiff enough or have enough travel. Ill figure something out if this gives me any trouble

Belt measured and alignment test. Hope it quiets down with an intake system on there

Ready for a tune

Blower is an eaton M90 off an old T-bird. Similar displacement V8 retrofits saw 5-7psi off a stock pulley single. 5psi would be perfect for this engine. I could possibly step the pulley down one size and still be within the RPM band of the M90 using the stock LS1 balancer. Due to the locations and general shape, an intercooler could be installed later if I felt it was necessary. For not its non-IC. Ive been battling between BOV or SC bypass valve systems for a while too. About a week ago I read an article about upgrading stock crappy bypass valves to a bypass system using a BOV, so theres a BOV in my system. To switch, I simply run a hose from the vent to a port to somewhere in the intake before the compressor. Id rather not to keep heat under control, but I will if the BOV sound gets annoying

Anyways, figured some people wouuld enjoy a build thread
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Old 07-09-2010, 07:13 PM   #2
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wow, thats unique, your old setup ran twin eatons?

just watched the vid, I hope I quiets down too, but great work non the less
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Old 07-09-2010, 07:36 PM   #3
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pretty impressive sir
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Old 07-09-2010, 09:20 PM   #4
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wow that is impressive
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Old 07-09-2010, 09:45 PM   #5
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more vids.. thats cool.. did it quiet down with the intake attached?
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Old 07-09-2010, 09:55 PM   #6
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wow, thats cool
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Old 07-09-2010, 10:40 PM   #7
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Very interesting. Props on the build
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Old 07-10-2010, 01:14 PM   #8
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Thumbs up

I give you and A for effort and the idea.
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Old 07-10-2010, 02:23 PM   #9
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How are you cooling/lubricating the blower? Mad respect Pocket, I knew you were good, but damn.
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Old 07-11-2010, 06:30 AM   #10
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Oiling system is self contained in the snout. I replaced the drive coupler and changed it when I did an overhaul. Gawd thats some stinky stuff

I havent ran it with the intake attached, only fabbed the last bit for the picture. Id rather wait till the car is at the tuners before hooking everything up
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Old 07-11-2010, 06:54 AM   #11
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That's so cool that you made that. I would love to make something like that for my Jeep
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Old 07-11-2010, 07:11 AM   #12
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Very impressive!! You def. know ur ****!!
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Old 07-11-2010, 08:02 AM   #13
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Very creative. Before and after HP numbers?
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Old 07-11-2010, 08:31 AM   #14
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That's pretty cool man! I used to have a Thunderbird Super Coupe that this SC came from and it definitely was not that loud. I hope it's just something to do with the more open intake and not something more serious inside the unit. You'll want to look into an intercooler for sure, those M90s throw out some heat even with a stock pulley. They don't call them Heatons for nothing haha.

Keep us updated though, that's pretty awesome and a very cheap setup! As someone above me asked, have you gotten any power numbers yet?
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Old 07-11-2010, 12:04 PM   #16
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gona show this to my friend jim who can fab stuff up..thumbs up to you
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Old 07-11-2010, 01:01 PM   #17
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THat's some awesome old school hotroddin goin on!!!!!!!!!!!!!!!!!!!! I get sick of seein people takein their crap to shops and spending a pile of money on it....Your gonna need 2 blowers for that ls motor for sure.
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Old 07-12-2010, 07:48 PM   #18
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i agree, this is the ''roots'' if you will, take something from something else and make it work for you. mad props to this guy. makes me want to scourer the junk yards and find me two little baby Eaton's!
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Old 07-12-2010, 10:04 PM   #19
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any numbers yet and is that going to be restrictive to power. what kind of gains you expecting to get over stock..
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Old 07-12-2010, 11:04 PM   #20
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Tune is set for friday. We'll see

Similar displacement V8 swaps saw 5-7psi

Single M90 for this engine, twin for the racecar. If I need to go bigger, a tray and collector extension is all thats required to fit a M112 on there. I havent ported this case yet either, alot of power can be had from a proper outlet port job, most of which Im not interested in
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