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| 06-07.5 LBZ & LLY Performance Parts Discussion Discussion of Performance Parts For the 06-07.5 LBZ/LLY Duramax Trucks No Advertising |
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07-07-2008, 02:18 PM
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eBay Motors
#1 (permalink)
| | Member
Join Date: Dec 2007
Posts: 73
| Straight Pipe
I posted a thread the other day about how I straight piped my 07 LBZ and I love the sound of it. I have already had people ask me what I have had done and its awsome! Today however I was talking to some people and I know that they don't have a whole lot of knowledge about diesels but they said that I am losing power because I have no back pressure now. I have heard that you do need some back pressure but am I losing power and if so how much do you think. Anyone else who has it done can you tell me. Even if I am losing power I dont think that I am going to change it cause there is nothing that sounds like A STRAIGHT PIPED D-MAX!!!! 
__________________
07 LBZ White crew cab, 4" MBRP Straight pipe, and AFE stage 2 intake and a PPE Xcelerator set on 160, fuel shim kit, EGR Blocker Plate, Autometer Ultralite two Boost and Pyro gauges, 20" Goliath wheels with 305/55 Nitto terra grapplers. | 
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07-07-2008, 02:27 PM
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eBay Motors
#2 (permalink)
| | Catch Me If You Can!
Join Date: Oct 2007 Location: Greenville, KY
Posts: 3,279
| you might lose just a little of the low end power, but with the PPE you won't notice it any at all. Don't worry about it and leave it straight piped.
__________________ KYLE 
05 Chevy LLY Crew Cab LT Dually 4x4, Crank it up Diesel Tie rod sleeves and centerlink, BD Diesel Remote Fuel Filter, EGR Blocked, TTS Dual Lift Pumps, FPRV Shim, Bullydog Outlook Monitor, AFE Stage 2 CAI and modded turbo mouthpiece, BD Diesel Manifold, Diamond Eye Turbo Direct Pipe, Diamond Eye 5" exhaust straight piped, Level Kit, Suncoast Stage IV w/ 1056 Torque Converter and Allison Deep pan EFI Live Tuned by IdahoRob!!!!
1981 VW Rabbit Pickup, 1.6L Diesel, 4 Speed Manual, 35 MPGs | |
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07-07-2008, 02:41 PM
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eBay Motors
#3 (permalink)
| | Member
Join Date: Jan 2008 Location: Chubbuck, Id
Posts: 47
| I think the turbo makes your back pressure for ya | |
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07-07-2008, 02:53 PM
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eBay Motors
#4 (permalink)
| | The Sheriff
Join Date: Jan 2008 Location: Cedarville,Arkansas
Posts: 1,600
| You dont need the back psi. like in a gas motor. The turbo gives you the psi. that is needed. A diesel will run better when it can breath better. More air in more air out.
__________________ Craig2001 Chevy, 4 door, short bed,D-Max, 2 wd. Mods.. straight piped exhaust,  Custom dent and scratch in passenger side rear panel.. Special Thanks goes to the person in the WAL-MART parking lot for installing it for me,  NEW MEMBERS-PLEASE HELP US HELP YOU.. FILL OUT YOUR SIG. IN THE USER CP. Your Sig should have the Year, Make, Model and any Mods.  | |
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07-07-2008, 02:57 PM
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eBay Motors
#5 (permalink)
| | Member
Join Date: Dec 2007
Posts: 73
| Okay thanks guys. I had heard this before but when I talked to people about it we were talking about gas engines. I am leaving it straight piped!
Thanks,
Derek
__________________
07 LBZ White crew cab, 4" MBRP Straight pipe, and AFE stage 2 intake and a PPE Xcelerator set on 160, fuel shim kit, EGR Blocker Plate, Autometer Ultralite two Boost and Pyro gauges, 20" Goliath wheels with 305/55 Nitto terra grapplers. | |
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07-07-2008, 03:38 PM
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eBay Motors
#6 (permalink)
| | DuramaxForum Veteran
Join Date: Dec 2007 Location: San Mateo, CA
Posts: 836
| You are good to go. Your truck will make more power strait piped. Gas engines are a different story. But if you are running a turbo on a gas motor the Turbo creates all the back pressure you need
__________________ John
05 4 door short bed 4x4 chevy LLY
EFI LIVE with McRat tune, DPS5, PPE Lift Pump, 4inch Turbo Back Strait Piped MBRP Duals, EGR block off, AFE stage 2 intake, Turbo resonator blocked off, 6000k HID kit, 305/75/16Super Swampers on stock rims, Auto Meter boost and pyro gauges, Killer sound system, Limo tint all the way around, Suncoast Stage IV built by me.  NO TALKING JUST LINE IT UP | |
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07-07-2008, 04:36 PM
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eBay Motors
#7 (permalink)
| | DuramaxForum Fanatic
Join Date: Mar 2008 Location: SoCal
Posts: 578
| Yea i don't think people would be doing it if it ment losing a ton of power. 
__________________
2002 Chevy LB7 Crew Cab
Bone Stock for right now!! Looking to add some real power>
16 inch Helo Rims and 285 Nitto Terra Grapplers
Thank you Duramax Forums | |
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07-07-2008, 09:06 PM
|
eBay Motors
#8 (permalink)
| | BRAIN SURGEON !!!haha
Join Date: Mar 2008 Location: Louisiana,when they let me stay
Posts: 2,055
| I see ya have 4 inch exhaust.Fact diameter pipes all the way to 5 inch will NOT have issues with back pressure,unless it threw a code,no worry!!I've straight piped now for 3 months and have never had a prob.Just keepin my right foot up,loved the sound also!!!
__________________  There she is<<
2006 GMC 2500HD4x4 sb cc LBZ!!!  52k
MODS/Full straight pipe,res mod,SC Fpaq tuner,285/75/16's
Additional gray Berber carpet on floorboards/courtesy of a customer whose home we just built!!!!FREE
2002 GMC 1500 2wd x-cab-sb 5.3l.
1987 89,000k 305H.O. 700-r4[pearl white/red striped]
1978 Malibu[2dr]350c.i./350hp TH-350 trans/jus a lil quick!!!
WORK RIG 2007 YukonXL GPS monitored for speed,braking,accel,and 5 mile radius from home..oh well | |
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07-07-2008, 09:10 PM
|
eBay Motors
#9 (permalink)
| | Senior Member
Join Date: Jan 2008 Location: Galt,California
Posts: 269
| leeaavee it straight piped haha.. i love mine, sounds sooo mean, i havent really noticed power loss
__________________ 04 black chevy dmax 6 inch lift
on 20 inch black kmc rockstars
4 inch afe turbo back no muffler,
to an 8 inch black tip like 3 1/2 feet long comin out under the bumper..
bully dog triple dog, afe stage 2 intake, limo tint all the way around. tinted windshield cant see in..
two tone black and gray leather seats
and blacked out headlights/blacked out tail lights and third break light/ red neon light kit in the cab at night/ blue reverse lights more to come  | |
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07-07-2008, 11:27 PM
|
eBay Motors
#10 (permalink)
| | Super Man Moderator Points: 10,525, Level: 44 |
Join Date: Oct 2006 Location: Irwin PA
Posts: 3,129
| I agree with everyone else that the diesel engine is completly different than a regular gas motor. Your engine will produce some more power straight piped.
Even if it didnt the noise rocks!
__________________ Jason 2006 Silverado Shortbed Crew Cab LBZ Escalade handles, Line-x, Painted bumpers and towing mirrors, Tinted Front Windows & Tail lights 4 Kicker 10in Subs & Punch 250amp in 2 custom boxs. Autometer Ultralite II Pyro & EGT gauges with pillar pod MBRP Turbo Back stainless exhaust (Straight piped), AFE Stage II Intake, PPE Hot+2 285/75/16 Nitto Terra Grapplers on Gear Alloy wheels Lost Kitty Reward if found!! 1999 Ford F-550 Powerstroke Tow Truck-Wrecker **Jerr-Dan Bed, S&B Intake  | |
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