Re: Type 1 twin screw supercharger build / 9 yrs later I'm back at it
Posted: Sat Jan 24, 2026 5:08 pm
Got a lot done today besides snow blowing.
(Irony is that my wife is in Antarctica and has better weather)
Got the valvetrain finished up and buttoned up the heads.
Then I installed the pressure relief and made a cooler bypass modification.
I measured and lathed a piece of aluminum to press fit inside the plunger.
It is the length to uncover the main galley hole plus a mm.
Since I do not use the factory cooler it will remove some restriction in the oil path.
And it is easily reversible in the future vs tapping and installing a plug.

Started to install the sump, you ever have one of those duh moments?
I didn't change out the stud that holds down the pickup.
Oops, but I finally managed to do it without loosing anything inside the engine.
Got the other studs changed out and test fitted the sump and no go.
The aluminum case protrudes too much at the flywheel end.

I hated to cut it with the engine partially assembled, but it had to happen.
But I decided to install the rear main seal to plug up an additional hole before I did.
No amount of gentle tapping with a dead blow hammer would get it to seat all around.
Sometimes you just have to make do with what you can find handy.

A Foxbody Cobra MAF duct taped to a belt idler, and a piece of aluminum round stock.

Then I cut the offending piece off the case.

And Installed the sump.

Tomorrow hopefully get a lot more done, but snow.....
(Irony is that my wife is in Antarctica and has better weather)
Got the valvetrain finished up and buttoned up the heads.
Then I installed the pressure relief and made a cooler bypass modification.
I measured and lathed a piece of aluminum to press fit inside the plunger.
It is the length to uncover the main galley hole plus a mm.
Since I do not use the factory cooler it will remove some restriction in the oil path.
And it is easily reversible in the future vs tapping and installing a plug.

Started to install the sump, you ever have one of those duh moments?
I didn't change out the stud that holds down the pickup.
Oops, but I finally managed to do it without loosing anything inside the engine.
Got the other studs changed out and test fitted the sump and no go.
The aluminum case protrudes too much at the flywheel end.

I hated to cut it with the engine partially assembled, but it had to happen.
But I decided to install the rear main seal to plug up an additional hole before I did.
No amount of gentle tapping with a dead blow hammer would get it to seat all around.
Sometimes you just have to make do with what you can find handy.

A Foxbody Cobra MAF duct taped to a belt idler, and a piece of aluminum round stock.

Then I cut the offending piece off the case.

And Installed the sump.

Tomorrow hopefully get a lot more done, but snow.....












