A Potential Sustainable SC12 / SC14 Supercharger Replacement.
*** Foreword: This thread is not about doing dodgy turbo installs with $50 T25 turbos, china spec cast manifolds for less then a replacement supercharger option. ***
I have recently been collecting various superchargers for a few projects (4AGZE & 1MZ-FZE) and recently I found a setup that might be a viable replacement for the old agricultural air pumps we call the SC12 & SC14 Supercharger.
With the arrival of my latest supercharger, an Eaton M90 from a Ford Thunderbird, it highlighted how compact the core of the M90 is, and most importantly, how close it is to the size of an SC12/SC14.
Out of the box, the TB M90 drive snout is too long, however their are shorter versions available, one example is a machined down snout from Jon Bond Performance.
However, there is a perfect M90 unit found on a model of Jaguar, which is a little less common and a bit more expensive then the more common M90's, it would be a lot simpler to bolt on.
The TB M90 itself can be picked up second hand for relatively good prices (I bought mine for $250) and they flood ebay.com (not .com.au) at reasonable prices even after importing. There are plenty of old-new stock and refurb units out there as well.
The TB M90 has three good mounting points (the Jag unit has 4) that will allow it to be mounted either direction to the side of a 4AGZE block with the use of a simple mount between supercharger and block. I have yet to test fit it against a spare engine to see which way the supercharger is best to mount (outlet firewall side or block side) however there is ample room for either.
The big reason I have decided to create this thread is because unlike the SC12 & SC14 superchargers, the Eaton range of superchargers are completely rebuild-able. You can buy full bearing kits, full drive rebuild kits, completely new rotors and even cases. You no longer have to play the game of roulette with buying 20+ year old SC12 or SC14's where someone else has already had the best out of them (or spun them beyond their limits and wants to off load it before it fails).