Re: Superchargers - what sort for a MGB MKII 1970?
Part of that cost is for their R&D and recovering that cost must be spread out amongst the units they expect to sell, which isn't many. If they had 3000 orders for the kit you could see the price drop drastically. As it is, I doubt Moss is really seeing much profit from their kit after you factor in the cost recovery for development.
Why should you pay for their R&D? The devil is in the details. You can't just bolt an appropriately sized supercharger onto the stock manifold. Are you going to make your own manifold or have someone fabricate it for you. Then there are the mods to the belt system to incorporate the belt drive for the supercharger etc... Your $4k buys more than just a supercharger at Moss. It's a kit that is supposed to have all you need in one box to make the swap. Theoretically allowing you to 'supercharge' your vehicle over the weekend. Doing it by bits and pieces can be done but will take you a load of time and in the end might not save you that much money. It's a balancing act of your time or your money. Up to you to decide how much money your time is worth.
The pieces are also new which should mean that their performance should be predictable. If you pick up a used supercharger then you have added a huge variable. Remember that just because a used part is new to you, it's not 'new'. Has it been abused? How are the impeller seals? etc... Will you have to spend more money on the used supercharger to equal the effect of a new supercharger etc... Why is the good deal such a good deal? There are deals out there, and if your willing to spend the time on a lot of fabrication you can do it. Who knows but you might even be able to improve on their design. /ubbthreads/images/graemlins/thumbsup.gif
The other question is that the system as its designed (for stock cams and stock compression ratios) yields about a 40% increase in power at the flywheel. With your cam and compression increase, your probably already close to that. So why would you want to supercharge? If you force feed your current engine at its current compression ratio you'll end up spending money on a new engine before long.
Just some thoughts to pass along. /ubbthreads/images/graemlins/cheers.gif