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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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  #11  
Old 02-11-2006, 12:50 PM
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TBSS TBSS is offline
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Quote:
Originally Posted by poSSum
18% driveline loss for the 2wd. Sure an eye opener for a Camaro guy that got 310 at the wheels from an advertised 327 HP LS1. Only mod was a lid.
I'm sure you are aware that the 327HP number was not accurate - it was an underrated number. Same year the LS1 was in the Corvette perhaps? I think they did something similar with the Grand Nationals (1984-1987) so the Corvette flagship could still retain the #1 spot, at least numbers-wise.

Anyway, 17-18% is about right for an auto with factory tuning.
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  #12  
Old 02-24-2006, 09:23 AM
GrimSS GrimSS is offline
 
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Wow! from your af you are running pig rich on the top.
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  #13  
Old 02-24-2006, 11:25 AM
TBSSTony TBSSTony is offline
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Quote:
Originally Posted by TBSS
Anyway, 17-18% is about right for an auto with factory tuning.
Really?! Damn, I thought that was about the loss for AWD. How bad are the losses for AWD then? 25%?
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  #14  
Old 02-24-2006, 11:35 AM
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Quote:
Originally Posted by TBSSTony
Really?! Damn, I thought that was about the loss for AWD. How bad are the losses for AWD then? 25%?
Probably close.
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  #15  
Old 02-24-2006, 11:19 PM
BIGBOS BIGBOS is offline
 
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The graph looks like hes actually lean at the upper RPMS
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  #16  
Old 02-24-2006, 11:42 PM
NVR2FST NVR2FST is offline
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Waaaay rich...you could put a blower on that thing w/ that A/F!
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  #17  
Old 02-26-2006, 12:29 PM
EssEss EssEss is offline
 
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Quote:
Originally Posted by Kybuilt
Maxed out at 330 torque and 324 hp. Will post the graph in a few.
Kybuilt, I know you have your Vector Tune now... when are you going back?
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  #18  
Old 02-27-2006, 09:24 AM
87GN 87GN is offline
 
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Quote:
Originally Posted by TBSSTony
Really?! Damn, I thought that was about the loss for AWD. How bad are the losses for AWD then? 25%?
Rule of thumb is usually:
15% for manual transmission vehicles
20% for automatic transmission vehicles
25-30% for AWD vehicles

These numbers account for 5% lose in the axle, 10-15% lose in the trans (manual / auto), and 5-10% lose in the t-case (depending on the design - direct vs. viscious). Of course these numbers could be reduced depending on lubricants used.
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  #19  
Old 02-27-2006, 10:13 AM
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02redhawk 02redhawk is offline
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Quote:
Originally Posted by 87GN
Rule of thumb is usually:
15% for manual transmission vehicles
20% for automatic transmission vehicles
25-30% for AWD vehicles

These numbers account for 5% lose in the axle, 10-15% lose in the trans (manual / auto), and 5-10% lose in the t-case (depending on the design - direct vs. viscious). Of course these numbers could be reduced depending on lubricants used.

[SIZE=2]Back when I was there, Michigan State University's dyno lab use(d) for the chassis-to-engine losses:
10% Manuals
13% Autos
17% AWD variants

FWIW, my dyno experience has normally shown the above #'s to result in much closer readings when comparing stock #s back to OEM advertised #s. Plus they're also a bit more conservative if/when people start trying to quote flywheel #s. But, most people end up using whatever they want.... It just turns into a guess once we start using fudge-factors anyways.
[/SIZE]
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  #20  
Old 02-27-2006, 09:04 PM
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Kybuilt Kybuilt is offline
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Quote:
Originally Posted by EssEss
Kybuilt, I know you have your Vector Tune now... when are you going back?
[SIZE=3]I took off work early Fri. last week, when I got to the speed shop, only one guy was working! I'm gonna try to go to the asphalt dyno this coming weekend [/SIZE]
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[COLOR=blue][B]Gone, but not forgotten:[/B][/COLOR]
[B][COLOR=red]Silverstone 2wd TB SS, Vector tune. Now in a much lighter LS2 vehicle.[/COLOR][/B]
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