With the Alternator Removed there is a good strong mount on which to mount the SC. The SC is mounted in the same way as the alternator was. A 12mm bolt 145mm long is used this requires that the mounts in the super charger to be drilled out but after that the super charger slips on very neatly. It does, however have little clearance to the main chassis rail as the following photo shows.
Luckily the SC is positioned low so it is near the axis of the engine mount and will not move much. The battery tray required moving so the battery was relocated in the boot.
The SC also requires a top mount so an arm from the supercharger was fabricated and attached to an A/C mount (from an alfeta). As can bee seen from the above photo the top arm has been made fully adjustable. The next photo shows the top arm in position.
The bottom mount fitted almost to well as it meant that the SC could not be moved in order to align the SC belt. To align the belt some careful measurement's where taken and the Crank Shaft pulley was fabricated accordingly .
The CSP (Crank Shaft Pulley) needs to run both the original fan belt and the new SC belt which is a flat belt with five small V's. as cross sectional drawing of this is shown bellow
There where two options in making the CSP, turn one up from scratch on the lathe or construct one from the Alfetta Air conditioning pulley and some other pulley. For time reasons the A/C pulley was used and after a short search at Pick a Part a pulley from an 86 Celica was found that had the correct profile for the belt of the SC and was also the correct size 140mm, which should provide around 6 PSI Boost. This is only an estimate based on the graph below which has been created knowing various pulley sizes and the boost they generated on the MR2.
On the Lathe the
inside of the Celica pulley was turned out and the A/C belt fins where turned down
both pulleys where sized and the pressed on to each other using Locktight.
Because there was little adjustment in the position of the SC a separate belt tensioner was fabricated using a tensioner from a Mitsubishi and is attached to the SC mounting bolt. The tensioner also creates some clearance between the Belt and the SC outlet (not shown in this photo).