L series turbo?

[thisisastickup]

How well does this work, and what's the power potential? I have a VG sitting in my garage, but I kind of want to keep the L20B. I think I could rebuild it for less than the VG swap, and have a fabricator friend build whatever metal parts I'd need.

 

What's the cost for a decent turbo setup?

 

What should I do to my engine when I rebuild it?

 

What are the pros/cons of a blow-through setup? Draw-through?

 

What parts will I need?

 

Also, if anyone can direct me to a writeup/build thread on this, that'd be great.

[MikeRL411]

Draw through - you are sucking in an explosive mixture. If. God forbid your blower rotor hits the case [asuming it's steel] or otherwise gets in close proximity to an ignition source - BOOM.

Blow through - it's only air. Nothing explosive until you get past the carb or port fuel injector.

[sssr20det510]

http://forum.ratsun.net/showthread.php?t=11371&highlight=daves+turbo

[datzenmike]

Blow through:

 

1/ need to contain the carb in a sealed container that will handle boost pressure. Fuel pressure must be automatically adjustable to match the boost level plus 3 lbs. or else any boost will over power the fuel pump and carb will run dry. Not a worry with draw through setup.

 

2/ as only air is compressed an inter cooler can safely be used to lower the charge temp which increases density and reduces pre ignition. Not possible with a draw through

 

Draw through:

 

1/ slamming the throttle closed on a draw through carb will cause near vacuum levels on the input side of the turbo causing oil to be sucked out through the seals on older model turbos.

[Ruster]

I am wondering: (crazy question) I've seen L6 surge tanks before, but never a L4. Anyone have actual pics of a L4 surge tank setup?

 

When I had thoughts of a off-beat turbo build for my l28 I was thinking along the lines of a blow through or draw through. Nice to see more people trying it:)

 

 

-ruster