Finally disassembled the original tired 250 in the 74 Maverick that received my first attempt at forced induction (Turbocharging) . Buick derived draw-through turbo with simple J-pipe enabled spooled up T3 to get 15-20psi at the intake log with turbo-specific Q'jet (850?) wide open' blub-blub... .
... the fun didn't last long and suddenly got a lot of blowby , leaky head gasket , less power - so pulled the engine. Head , Bearings, Cam looked OK , except slight scratch down rear wall of Cyl #6. I though it broke a piston ring but after removing piston, it was the OEM piston ring's land's that broke away from piston. Block is good for an overbore but it is a lesson in limits ...
Basically used the original engine for figuring 74's engine bay dimension options for forced induction projects. The Buick draw-thru works well enough but is too big for the 250 in the Maverick, may try a shorter 200 but for now working on 250 forced induction blow-thru carbed' setup with supercharger forced induction.
have fun
... the fun didn't last long and suddenly got a lot of blowby , leaky head gasket , less power - so pulled the engine. Head , Bearings, Cam looked OK , except slight scratch down rear wall of Cyl #6. I though it broke a piston ring but after removing piston, it was the OEM piston ring's land's that broke away from piston. Block is good for an overbore but it is a lesson in limits ...
Basically used the original engine for figuring 74's engine bay dimension options for forced induction projects. The Buick draw-thru works well enough but is too big for the 250 in the Maverick, may try a shorter 200 but for now working on 250 forced induction blow-thru carbed' setup with supercharger forced induction.
have fun