that Bugatti ,is it the genuine article ?
I wonder if the pick up screen being 1" off the sump base will be a little too far ? 1/4" - 7/16" being a usual gap to see maybe ?Starting to get a little serious with rebuilding my cheap (for here) 3.9 ex disco engine. In the interest of improving lubrication some I have looked into the SD1 front cover - enlarged all the galleries I can get to. This late block (HRC2411) already has large galleries - the pick up hole that meets the pick up is 9/16" dia. The original pick is quite small dia, so I looked around US suppliers and found a Melling 20-IS2-BK for the Buick series engines. This has a 5/8" pick up tube, and a bigger inlet screen. Measured fitted to the block its actually 1/8" shorter than the original pick up inlet, at 5" dead from the block bottom face. The SD1 sump I plan on using is 6" deep (ignoring gasket thickness), and though the Melling pick up is angled towards the rear, there should be plenty of vertical clearance. I had to relieve some of the baffle in the sump to get it to clear the pick up tube.
Quattro - when you say you 'set' yours at 1/4" - how did you do that? Spacer on the mount, bending the tube, modifying the sump base?
Anybody know how close the SD1 pick up is to the sump bottom? These sem to be unobtainable....