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Old 08-07-2013, 11:55 PM   #1
TCHWRX
Scooby Newbie
 
Member#: 118404
Join Date: Jun 2006
Chapter/Region: W. Canada
Location: Calgary, Alberta, Canada
Vehicle:
2006 Impreza WRX TR
WRB

Default drop-in or rebuild, thats the question?

I have a 2006 WRX with about 110.000 miles on it. Blown head gasket so I have two options the way I see it.
1) take the current engine and drop in new pistons when changing the head gasket anyways.
2) finish my rebuild project, with all new parts in a redone 2010 STI block (will set me back a additional extra 1.000)

Power goal, something that can deal with 450BHP.

So here is the question:
Can I go with the engine I have and drop in or should I go for the rebuild?
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Old 08-08-2013, 12:36 AM   #2
Flat 4 Motorsport
NASIOC Vendor
 
Member#: 295846
Join Date: Sep 2011
Chapter/Region: MWSOC
Location: Crook County, Illinois
Vehicle:
WRX FP HTA GT3076R
Sexual Chocolate

Default

Quote:
Originally Posted by TCHWRX View Post
I have a 2006 WRX with about 110.000 miles on it. Blown head gasket so I have two options the way I see it.
1) take the current engine and drop in new pistons when changing the head gasket anyways.
2) finish my rebuild project, with all new parts in a redone 2010 STI block (will set me back a additional extra 1.000)

Power goal, something that can deal with 450BHP.

So here is the question:
Can I go with the engine I have and drop in or should I go for the rebuild?
No,


You need to check the cylinder for roundness, taper, health.

so use a new block. If you're going to spend all that money on all the other parts, $1050 for case halves really is a drop in the bucket compared to all the issues you can experience with doing it half assed.

Have bearing clearances measured and do it right. or just buy a stock OEM shorblock.


Racing parts are racing parts and there are specific reasons why something can take the abuse on the race track for a few races before the engine is torn down and rebuilt for the next race.

If you're going to build a daily driver and want to beat on it, get a piston with an offset pin to start with and measure, measure, measure.

If you don't have the tools find a competent machine shop that has done a Subaru motor before. Ask to see the shop, if they wont give you a tour, don't take your stuff there. If its dirty messy where the assemble don't take it there. ask to see their Subaru torque plate(s)

And please research your project before you start buying parts.


450 is a lot of power if you have never driven a car with that much power.

good luck, lmk if you need anything or have any questions

-Phil @ F4M
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