Which Cylinder Heads Came On Your TBSS - Page 3 - Chevy TrailBlazer, TrailBlazer SS and GMC Envoy Forum



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Go Back   Chevy TrailBlazer, TrailBlazer SS and GMC Envoy Forum > 2006 - 2009 TrailBlazer SS Tech > 06-09 SS Engine and Drivetrain > Engine Tunes/Mods

Engine Tunes/Mods Engine tuning and/or modifications

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  #21  
Old 03-25-2007, 08:02 PM
superblue superblue is offline
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2006 Chevy TrailBlazer SS
Superior Blue Metallic 6.0L LS2 V8 AWD
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799 heads

those heads are on our 07 tahoe and 06 silverado, both 5.3l, not 6.0l... my 06 tbss has 243's... i just cant see how the same casting can be used on two different displacements.



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  #22  
Old 03-25-2007, 08:12 PM
Liquiddi Liquiddi is offline
 
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243's on both of mine.
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  #23  
Old 03-25-2007, 08:12 PM
MisterP MisterP is offline
 
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Quote:
Originally Posted by superblue View Post
those heads are on our 07 tahoe and 06 silverado, both 5.3l, not 6.0l... my 06 tbss has 243's... i just cant see how the same casting can be used on two different displacements.



In the Gen-III & IV motors GM has gone to changing piston dish sizes rather than head chamber dimensions to control compression ratio; it's cheaper in a manufacturing sense. Example in Silverados (Vortec motors) is the 6.0L LQ4 & 6.0L LQ9, they are identical except for the pistons, the LQ4 has less compression (low compression pistons) than the LQ9 to run primarily on 87-octane.

Mr. P.
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  #24  
Old 03-25-2007, 10:20 PM
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dancemfSS dancemfSS is offline
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2007 Chevy TrailBlazer SS
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My 07 Tbss has 243 on both sides and the build date is 10/06.
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  #25  
Old 03-26-2007, 03:44 PM
machineman machineman is offline
 
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Quote:
Originally Posted by superblue View Post
those heads are on our 07 tahoe and 06 silverado, both 5.3l, not 6.0l... my 06 tbss has 243's... i just cant see how the same casting can be used on two different displacements.



A casting is just that... a CASTING. The real story is the part number on the head. Probably behind the accessorys on drivers side and against the firewall on passengers side.
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  #26  
Old 03-26-2007, 09:24 PM
cybersid13 cybersid13 is offline
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just checked my 07 ss and my heads are 799. Where can I find the build date?

sean
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  #27  
Old 03-26-2007, 09:29 PM
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dancemfSS dancemfSS is offline
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Its on your drivers door.
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  #28  
Old 03-26-2007, 09:35 PM
cybersid13 cybersid13 is offline
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Thanks, my build date is 12/06.
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  #29  
Old 03-26-2007, 09:47 PM
jack0278 jack0278 is offline
 
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I have 243's on my 2007 TBSS
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  #30  
Old 03-26-2007, 09:53 PM
KWB KWB is offline
 
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I can't check my TBSS as it is in the shop having the rear end replaced (long story). So I took a look at my '05 SSR (same engine), has 243's on both sides.
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