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LQ4/T56 into 05 Subaru Legacy

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Old 08-14-2012, 04:13 PM
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Nice! A buddy and I have been debating this very same swap. Good luck!
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Old 08-14-2012, 05:52 PM
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Thanks. It has been alot of fun and hard work so far and should be great to drive
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Old 08-18-2012, 05:44 PM
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Well, we made some progress today. The day started off on a bad note as we found somebody had stolen the cats from the van and two other cars that were parked in front of the shop.

After we filed the police report, the got better and we were able to pull the motor out of the van. I started tearing it down and everything looks good so far. I will update with pics later
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Old 08-19-2012, 04:36 PM
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Here are some pics of what we have completed over the last few days:






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Old 08-19-2012, 04:50 PM
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Nice work, sucks to hear about the cats though. How did you go about cleaning up the pistons like that?
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Old 08-19-2012, 07:45 PM
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Originally Posted by jrob56
Nice work, sucks to hear about the cats though. How did you go about cleaning up the pistons like that?
Good question they are like new!!! My buddy likes his projects with lots of brake cleaner lol. Brake cleaner for everything. For his birthday i'll get him a 24pack of brake cleaner
Nice build
We are doing 2 builds simotaneously. The LM4 Miata Frankenstein and this one
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Old 08-20-2012, 03:30 AM
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I have a 05 legacy gt as a DD! Mine doesnt have an LS swap in its future though Good luck!
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Old 08-20-2012, 04:43 PM
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He is correct. It was all brake cleaner and some scouring pads
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Old 08-25-2012, 11:07 PM
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I bought some L92 heads as well as an L76 intake to match

My questions are, what is a cam that makes good power but is known not to cause PTV issues with the LQ4/L92 combo

Can I mill the L92's to raise compression without issues?

What throttle body to use with this to be compatible with my 03 ECU?
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Old 08-26-2012, 09:14 AM
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You should really consider having PatrickG or one of the sponsors spec you out a custom cam for your combo. Either way, you should at least use clay to check PTV just to be sure.
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Old 08-27-2012, 04:22 AM
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wow awesome swap
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Old 08-27-2012, 10:01 AM
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Great idea! I contacted a local vendor

Originally Posted by -Q-
You should really consider having PatrickG or one of the sponsors spec you out a custom cam for your combo. Either way, you should at least use clay to check PTV just to be sure.
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Old 08-28-2012, 02:34 PM
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Cleaned up the block a bit
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Old 08-28-2012, 02:45 PM
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We notched the subframe further so the engine would move back toward the firewall and test a 3/4 in. shim in between the subframe and body to drop it lower







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Old 08-28-2012, 11:26 PM
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Consider using the stock cam to get it running and work the kinks out...
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Old 08-31-2012, 05:23 PM
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Here is where the parts collection stands now:

LQ4 6.0L Block
L92 Rectangle Port Heads (will be milled down to get compression around 10.5:1)
Billet Timing Chain Kit
GTO Front Sump Oil Pan and Pickup
Comp XR273HR Camshaft (220/224 .530/.534 112LSA)
LS3 Blue Springs
L76 Intake Manifold
LS7 Fuel Rail
LS3 Corvette Water Pump
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Old 08-31-2012, 09:52 PM
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being a Subaru owner myself.... this is awesome lol have you posted this over on NASIOC? people would get pissed if they knew about this I'm sure haha definitely following this!
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Old 09-01-2012, 09:59 AM
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Hehe thanks. I do have a thread going in the conversions forum over there
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Old 09-06-2012, 09:29 AM
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The motor is coming together very nicely now. Just need to pick up injectors and a few other odds and ends

LQ4 6.0L Block
L92 Rectangle Port Heads
LS3 Blue Springs and Retainers
Comp XR273HR Camshaft (220/224 .530/.534 112LSA)
Billet Timing Chain Kit
Melling OEM Oil Pump
GTO Front Sump Oil Pan and Pickup
L76 Intake Manifold
LS7 Fuel Rail
LS3 Corvette Water Pump
LS3 Corvette Harmonic Balancer
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Old 09-06-2012, 10:03 AM
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Originally Posted by btlegacy
The motor is coming together very nicely now. Just need to pick up injectors and a few other odds and ends

LQ4 6.0L Block
L92 Rectangle Port Heads
LS3 Blue Springs and Retainers
Comp XR273HR Camshaft (220/224 .530/.534 112LSA)
Billet Timing Chain Kit
Melling OEM Oil Pump
GTO Front Sump Oil Pan and Pickup
L76 Intake Manifold
LS7 Fuel Rail
LS3 Corvette Water Pump
LS3 Corvette Harmonic Balancer
Nice setup, more pics!
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