rhkcommander
Full Access Member
sorry to hear about the troubles, but it isn't easy treading in uncharted waters. Looks like your doing great so far ![Sweet ;Sweet ;Sweet](/styles/default/xenforo/smilies/Thumbup19.gif)
![Sweet ;Sweet ;Sweet](/styles/default/xenforo/smilies/Thumbup19.gif)
The problem is that those sheets are not totally correct for all applications. Remember that boost is a measure of restriction. So, technically, if you have a blower that pushes out 10 psi and a lot of work gets done on the engine and exhaust and that same blower at that same speed only produces 6 psi. (remember this is in theory only), the engine is going to make more power even though it shows less psi. I am not sure how much I can increase the size of the crank pulley. I know it will not be a lot becaus of how close it is to the waterpump pulley. So, I am going to run a shrunkin SC pulley when I have a chance to figure out how to get it together....but as for now, I have an idea that I think will work...and that is more than I had a week ago.
SWS
I was afraid you'd have issues making much of any boost with the M90 on the 6.9L. I've seen guys struggle to make 5lbs of boost with them on the 300's.
I don't know if you'll be able to go with a small enough pulley on the Eaton to make it work. It might be time for a jackshaft.![]()
Or maybe a gear drive set up like some of the centrifugal superchargers have.
I'd like to see someone try a Shelby GT500 H122 Eaton on a IDI.
He isn't looking for insane boost. Just a lil off of idle, which an M90 should give him due to being the positive displacement type.
None of the stock Eaton superchargers will produce an "insane" amount of boost.
I don't think he'll gain enough blower rpm with just a pulley swap. Now Add the pulley swap to a jackshaft or gear drive and he'd get closer.
Make sure to post lots of pics when you do your install.![]()
The Shelby H122 is a Hybrid between a twin screw blower and the roots.
I am looking at an 84(I think) dualley with a banks kit and an overdrive. If I can get it for this, I will add the turbo to the rear and make it a compound setup.
SWS