LQ4 build up?
Thread Starter
Joined: Jan 2008
Posts: 8,184
Likes: 28
From: Orange County, CA
LQ4 build up? I am thinking about getting a complete LQ4 at a junkyard for $600. I believe its a '00, was running motor, and it looks in good shape.
Is this a good platform to mod? I want to get the engine on a stand and build it up. It will be a long term project for a 98-02 fbody. And hopefully I want it to pass emissions.
I was thinking about LS6 intake, LS6 cam, P&P heads, 85 mm TB, 85 mm MAF, 42# injectors, hone the block, forged 4.000 crank, connecting rods, forged aluminum full dish pistons for a 9.0:1 compression ratio. And eventually...boost!
Is this a good platform to mod? I want to get the engine on a stand and build it up. It will be a long term project for a 98-02 fbody. And hopefully I want it to pass emissions.
I was thinking about LS6 intake, LS6 cam, P&P heads, 85 mm TB, 85 mm MAF, 42# injectors, hone the block, forged 4.000 crank, connecting rods, forged aluminum full dish pistons for a 9.0:1 compression ratio. And eventually...boost!
the iron block is good to use for boost. Does it have a 6.0L stamped in the side? or 5.3L.
I have a 6.0 that I am getting some more info then buying some parts for a killer 408 set up.
Give them 400 cash and see if they take it. If it has 317 heads then it would be worth 600
I have a 6.0 that I am getting some more info then buying some parts for a killer 408 set up.
Give them 400 cash and see if they take it. If it has 317 heads then it would be worth 600
Thread Starter
Joined: Jan 2008
Posts: 8,184
Likes: 28
From: Orange County, CA
Casting number on the block: 12551364. I initially thought it was an LM7, but then I read the casting number. I haven't got a chance to read the head casting number yet.
I am looking into a 408 stroker kit. Summit has a few, Eagle kit is about $2600 for an all forged kit. Lunati kit is ~$4000.
I may just stick with the stock bottom end and only boost about 8-10 psi. I think I will be satisfied with that.
I am looking into a 408 stroker kit. Summit has a few, Eagle kit is about $2600 for an all forged kit. Lunati kit is ~$4000.
I may just stick with the stock bottom end and only boost about 8-10 psi. I think I will be satisfied with that.
Thread Starter
Joined: Jan 2008
Posts: 8,184
Likes: 28
From: Orange County, CA
I picked up the motor today...I verified that its a complete 6.0 liter LQ4 with aluminum 317 heads...all for $500+taxes. I bought an engine stand, waiting on a buddy to borrow a cherry picker to get it off the truck. I'm excited to start the project.
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Thread Starter
Joined: Jan 2008
Posts: 8,184
Likes: 28
From: Orange County, CA
It says your LQ4 is built and tuned...what did it take to hit 446hp/416tq? What heads and cam are you running, etc?
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Verdad Gallardo 224/224 .581 114lsa Comp Cam
AFR 205 Heads (milled to 59cc)
somewhere around 11:1 to 11:2:1 compression
BBK SSI Intake Manifold
BBK 80mm TB
BBK LT's
BBK ORY
Magnaflow Catback
CMS Tune
AFR 205 Heads (milled to 59cc)
somewhere around 11:1 to 11:2:1 compression
BBK SSI Intake Manifold
BBK 80mm TB
BBK LT's
BBK ORY
Magnaflow Catback
CMS Tune
If your gonna be stroking out the motor, I'd run a larger cam than the LS6 cam. Raise the compression ratio while it's N/A so mill the LS6 heads down. Once you do go F/I then get 72cc chambered heads.
Thread Starter
Joined: Jan 2008
Posts: 8,184
Likes: 28
From: Orange County, CA
New recipe. New recipe:
Stock crank, polished and balanced
Eagle I Beams
Mahle Pro Packs
Bore/Hone the block
Dart 225cc Stage 1 heads
Custom grind cam
LS6 Intake
1 7/8ths Headers
Goal: 500 rwhp.
Stock crank, polished and balanced
Eagle I Beams
Mahle Pro Packs
Bore/Hone the block
Dart 225cc Stage 1 heads
Custom grind cam
LS6 Intake
1 7/8ths Headers
Goal: 500 rwhp.
Thread Starter
Joined: Jan 2008
Posts: 8,184
Likes: 28
From: Orange County, CA
I read a post about running a LS2 timing set, is that recommended with high output? Also saw a suggestion for a ported oil pump. Is it as simple as slightly enlarging and smoothing out the entrance and exit openings? Shim the relief spring?
