INTERNAL ENGINE MODIFICATIONS Valvetrain |Heads | Strokers | Design | Assembly

1st LS 408 engine build

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Old Aug 29, 2013 | 06:31 PM
  #71  
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Originally Posted by Atomic
Meh...feed it some compression...I ran a 11:1 408 with a tvs1900 at 8lbs on pump 93 with 20 degrees of timing, not a single problem and had more torque than you know what to do with.
I bet half throttle lane changes in that truck were fun as hell


OP, call Texas Speed and talk to them about what you want to accomplish and they will point you in the right direction. There are a bunch of good experienced guys over there
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Old Aug 29, 2013 | 07:56 PM
  #72  
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OP, call Texas Speed and talk to them about what you want to accomplish and they will point you in the right direction. There are a bunch of good experienced guys over there
I keep looking at there site for pricing and info I think thats where I'm going to buy all my arts from.
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Old Aug 30, 2013 | 09:35 AM
  #73  
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Originally Posted by Atomic
Meh...feed it some compression...I ran a 11:1 408 with a tvs1900 at 8lbs on pump 93 with 20 degrees of timing, not a single problem and had more torque than you know what to do with.
"Meh...feed it some compression..." ahahahaha probably the funniest thing I have read on pt. I almost want to put this quote in my sig haha

No ****......11.1 408 with boost, that's awesome. Do yall think my 10:1 compression with 24* of advance on 93 octane is on the weak side?
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Old Sep 2, 2013 | 12:27 AM
  #74  
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03 04 05 06 07 Silverado 2500 Engine 6 0L Vin U 8th Digit Gasoline | eBay check this motor out think it might be a motor to build.
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Old Sep 4, 2013 | 09:32 PM
  #75  
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800 plus 220 for shipping good or bad for the motor in last post.
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Old Sep 5, 2013 | 03:39 PM
  #76  
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$800 seems about the average price of a lq4 100-200k. Never know what condition the motor is in until it comes apart.

I believe the lq4 heads have a 71-2cc, so flat top pistons with stock gaskets and NO milling will put you right at 10.1:1 compression. But if you got some 243/799 heads which have a 64cc with flat tops you will be at 11:1 compression.

Shoot for 11:1 with a N/A motor
Here is a great tool for calculating compression
Engine Size and Compression Calculator
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Old Sep 6, 2013 | 06:10 PM
  #77  
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Originally Posted by Camin00
$800 seems about the average price of a lq4 100-200k. Never know what condition the motor is in until it comes apart.

I believe the lq4 heads have a 71-2cc, so flat top pistons with stock gaskets and NO milling will put you right at 10.1:1 compression. But if you got some 243/799 heads which have a 64cc with flat tops you will be at 11:1 compression.

Shoot for 11:1 with a N/A motor
Here is a great tool for calculating compression
Engine Size and Compression Calculator
I was looking at texas speed's and found a head cam combo I'm going to call them about, anywhere you know of to get a full set of pistons and rods cause for the price of both from texas speed i might as well go ahead and buy the bottom end package from them?
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Old Sep 7, 2013 | 01:50 PM
  #78  
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Yea I seeing around 1000-1200 for low-end forged up to 2500 for high-end.

Here what I would do, call texas speed and find out which pistons and rods you will need for your power goals. Remember the stock GM rods and pistons internals are strong/reliable to 500+rw, so you don't need to get the best forged parts. Call other people and start another thread about brands and models.

Once you figure out the exact parts you want then type the model numbering or just piston name/specs in google shopping and it will list almost every web site online that sells that model.
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Old Sep 7, 2013 | 11:40 PM
  #79  
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Originally Posted by Camin00
Yea I seeing around 1000-1200 for low-end forged up to 2500 for high-end.

Here what I would do, call texas speed and find out which pistons and rods you will need for your power goals. Remember the stock GM rods and pistons internals are strong/reliable to 500+rw, so you don't need to get the best forged parts. Call other people and start another thread about brands and models.

Once you figure out the exact parts you want then type the model numbering or just piston name/specs in google shopping and it will list almost every web site online that sells that model.
Will be on the phone with Texas speed tomorrow. Ill let y'all know what I come up with.
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