Subaru Enthusiasts Car Club of the Sierras - View Single Post

Dean · 2007-01-02, 08:35 PM

OK, my stock turbo is cracked in 3 places...

Need to make a quick decision: Input, other options and comments welcome) I will be researching for the next couple hours....

VF-39 (Same as stock, spools quick, prone to cracking apparently, drops off at 55000, SP legal, $950)
VF-43 (Same as '07 stock, spools quick, cracking probably the same, less prone to boost creep due to new wastegate, SP legal, $???)
18G ( Spools as fast if not faster, Solid design, flow???, Welcome to SM, need injectors???, $???)
20G ( Spools slightly later, Solid design, flows longer, Welcome to SM, need injectors, $1800 or so)

I am thinking the VF39 is out since I can use a VF43 due to update / backdate. And yes, since the long block has the same PN, I don't believe I have to swap the engine.

20G is interesting but puts me in SM where I still believe the STI is not truly competitive vs. say a 500+ HP 2500 lb. car.

For an autocross car, I think the most important thing is space under the HP curve. Or how early does the power come on, and how late does it stay.

The longer you can stay in 1 gear and be efficient saves seconds vs. shifting.

Anybody following any other forum discussions on the options?

Reading this right now.: http://forums.nasioc.com/forums/show....php?t=1141476

2007-01-02, 08:35 PM	#1
Dean Señor Cheap Bastarde Real Name: Dean Join Date: May 2003 Location: $99 Tire Store Posts: 9,294 Car: $.04 STI Class: Fast,Cheap & Reliable=STI Deal, did somebody say Deal? Oh, Dean, yeah that's me.	New Autocross Turbo: VF39, VF43, 20g??? OK, my stock turbo is cracked in 3 places... Need to make a quick decision: Input, other options and comments welcome) I will be researching for the next couple hours.... VF-39 (Same as stock, spools quick, prone to cracking apparently, drops off at 55000, SP legal, $950) VF-43 (Same as '07 stock, spools quick, cracking probably the same, less prone to boost creep due to new wastegate, SP legal, $???) 18G ( Spools as fast if not faster, Solid design, flow???, Welcome to SM, need injectors???, $???) 20G ( Spools slightly later, Solid design, flows longer, Welcome to SM, need injectors, $1800 or so) I am thinking the VF39 is out since I can use a VF43 due to update / backdate. And yes, since the long block has the same PN, I don't believe I have to swap the engine. 20G is interesting but puts me in SM where I still believe the STI is not truly competitive vs. say a 500+ HP 2500 lb. car. For an autocross car, I think the most important thing is space under the HP curve. Or how early does the power come on, and how late does it stay. The longer you can stay in 1 gear and be efficient saves seconds vs. shifting. Anybody following any other forum discussions on the options? Reading this right now.: http://forums.nasioc.com/forums/show....php?t=1141476 __________________ I am a Commodore PET --- Now get off my lawn you kids... Last edited by Dean; 2007-01-02 at 08:43 PM.