Supercharger build up

[Shadowbug]

Well I got my supercharger the other day and have begun prep for install

supercharger is a roots style unit from a Toyota 4AGZE (j-spec)
the engine it came off is 1.6L it will be going on my freshly rebuilt 1.7l Type 4

the engine has been converted to 911 style cooling, its basically a stock 914 1.7L with a cam

intake will be a custom fabbed unit made from mandrel bent tubing using stock type 4 intake as a base (cast pices with intake bosses) and will run a megasquirt FI.

The S/C has a magnetic clutch so with the flick of a switch I can run normally asperated. still got to take the clutch assembly apart to see if I can make a spacer to fit between it and the main unit, so I can set the Supercharger back further but still line the belts up just right.

I'll post pics soon

[Shadowbug]

ordered my megasquirt today.
also beadblased and painted (might blast it again and clearcoat instead) the supercharger.

still have to decide if I'm going to make use of a intercooler yet. it would be a good idea, but with just 8psi of boost, there might not be any need for it.

Will post more pics as it progresses.

[yetibone]

That rocks!

A buddy of mine had a supercharged MR2 a few years back, and man what a hoot that car was to drive! Totally smoked my old '88 Supra back then.

The clutch drive was computer controlled, and was unlocked during any running state other than accelleration, and high speed running. Pretty slick for maintaining good MPG's.

An intercooler will be a good idea, regardless of boost pressure. The cooler the air, the higher the oxygen content for a given volume.

[Shadowbug]

Ya the sid\ze of pullies I'm going to be running to drive the Altenator and S/C will mean I'm putting out more than 12psi boost, so Intercooler is not an option, its a requirement.

I decided to do a partial rebuild on the S/C which involves replacing two of the bearings, but because these bearings are not avaliable in north america, I've decided to run a double ball bearing setup sleaving a 40mm od bearing to fit the 45mm bore.

the rotors look to be in good shape so they were just carefully cleaned, lubed up with vasalene (to prevent oxidation) and stored away.

the main case and gear cover were bead blasted (again) and are being powdercoated "almost Chrome" before reassembly.

there is very little scoring on the machined surfaces, this will be hit lightly with 1500 grit wet dry to ensure thay won't cause any further scratches on the rotors.

Will post pics as I begin supercharger reassembly, and when my megasquirt kit arrives.

[Shadowbug]

Gut my megasquirt today and have begun assembly, also rebuilt the supercharger, powdercoated a different color too.

first order of business after the megasquirt build is the intake manifold, plan is to build it so I can bolt the TB directly to it in order to run N/A and get it tuned in, then add the Supercharger. I need to figure out pulley sizes to drive the supercharger at the correct speed, cause the teflon coating begins to melt at 14psi, which is WAY higher than I want to run it, I'm thinking 8 psi is max.

I wish I had my own machine shop, or at least a Lathe, it would speed the process along considerably. Pulleys and the toothed wheel for ignition need to be machined to get it all working together.

[volkdent]

Sounds like a lot of fun!!! Get those pics up so we can ride along with you on this little fabrication journey.

Jason