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Speed Engineering True Dual Exhaust Prototype..

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Old Feb 18, 2016 | 04:29 PM
  #341  
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Just ordered mine
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Old Feb 18, 2016 | 08:52 PM
  #342  
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Ok, thought you guys would enjoy some actual dyno numbers of the true dual exhaust.

Vehicle:
-2008 Sierra Crew Cab 4x4
-6.0L LQ4 Engine (Stock Bottom End & Heads)
-228 Camshaft
-Our 1 7/8" Longtube headers
-Stock 3" Cat-Back w/Magnaflow muffler welded in.

1100MD Mustang dyno:
Stock Cat-Back w/Magnaflow Muffler
-343rwhp
-331rwtq

Our 3" True Dual Exhaust
-367rwhp
-350rwtq

Gain: 24rwhp/19rwtq

No other changes were made to the vehicle besides the exhaust swap. The thing we were most surprised with was the torque gain across the board. It didn't loose any bottom end. The larger 3" exhaust actually gained torque across the board.

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Old Feb 18, 2016 | 09:30 PM
  #343  
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you guys tweak the tune at all?
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Old Feb 18, 2016 | 09:34 PM
  #344  
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Originally Posted by Speed Engineering
Ok, thought you guys would enjoy some actual dyno numbers of the true dual exhaust.

Vehicle:
-2008 Sierra Crew Cab 4x4
-6.0L LQ4 Engine (Stock Bottom End & Heads)
-228 Camshaft
-Our 1 7/8" Longtube headers
-Stock 3" Cat-Back w/Magnaflow muffler welded in.

1100MD Mustang dyno:
Stock Cat-Back w/Magnaflow Muffler
-343rwhp
-331rwtq

Our 3" True Dual Exhaust
-367rwhp
-350rwtq

Gain: 24rwhp/19rwtq

No other changes were made to the vehicle besides the exhaust swap. The thing we were most surprised with was the torque gain across the board. It didn't loose any bottom end. The larger 3" exhaust actually gained torque across the board.

08 with an lq4?????
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Old Feb 18, 2016 | 09:52 PM
  #345  
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GM_Devil: Nope, tune was not touched. Probably a little lean on the true dual run I am assuming, not sure. We didn't have the wideband plugged in.

Wolftrk99: Yes, the truck came with a 5.3L, but I picked up a cheap 2004 junk yard LQ4. I went with the LQ4 because eventually I plan on throwing boost at it.

Sean
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Old Feb 18, 2016 | 10:00 PM
  #346  
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How did you get around the 24x crank reluctor in an 08???
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Old Feb 18, 2016 | 10:08 PM
  #347  
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You can either change the reluctor or use Lingenfelter's converter box.

Sean
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Old Feb 18, 2016 | 10:19 PM
  #348  
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Ok good point.....
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Old Feb 19, 2016 | 04:54 AM
  #349  
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Originally Posted by GM_Devil
I can vouch for Vmaxpro, Got mine yesterday as well, System looks AMAZING! Cant wait to put it on this weekend!
Ughh damn ups I wont have my mufflers till tuesday was hopin to have this done this weekend.
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Old Feb 19, 2016 | 04:01 PM
  #350  
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Originally Posted by Speed Engineering
GM_Devil: Nope, tune was not touched. Probably a little lean on the true dual run I am assuming, not sure. We didn't have the wideband plugged in.

Wolftrk99: Yes, the truck came with a 5.3L, but I picked up a cheap 2004 junk yard LQ4. I went with the LQ4 because eventually I plan on throwing boost at it.

Sean
LEAN IS MEAN!

Well thats good to know, i was wondering if i was going to have to add some fuel. Ill do a few logs and check it out.

Thanks for the speedy shipping! Im really excited to know what this beast sounds like!
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