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01-04.5 LB7 Performance Parts Discussion Discussion of Performance Parts For the 01-04 LB7 Duramax Trucks No Advertising
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#1 permalink Junior Member
Join Date: Oct 2009
Posts: 12
Mouth Piece
im knew to diesels and ive seen alot of yall say buy a egr lock off (i understand that) and buy a mouth piece, what are yall talking about?
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#2 permalink Looking for low 12's.
Join Date: Mar 2008
Location: Columbus,IN
Posts: 8,960
The piece on the inlet side of the turbo.
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07.5 LMM- MBRP 4" Cool Duals, CTS Race, BD manifold, DE Downpipe, Garrett 4094, Stage IV transmission, Sport comp II gauges, S&B intake
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#3 permalink Senior Member
Join Date: Jan 2009
Posts: 284
Quote:
Originally Posted by
shrummyboy im knew to diesels and ive seen alot of yall say buy a egr lock off (i understand that) and buy a mouth piece, what are yall talking about?
The problem is on the lly engines.
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#4 permalink Senior Member
Join Date: Feb 2009
Location: Vegas
Posts: 260
Quote:
Originally Posted by
shrummyboy im knew to diesels and ive seen alot of yall say buy a egr lock off (i understand that) and buy a mouth piece, what are yall talking about?
Quote:
Originally Posted by
bpe1 The problem is on the lly engines.
The mouthpiece is a problem on the LLY motors... the egr blocker plate refers to all year durmax trucks.
Egr blocker keeps nasty exhaust gases from being pushed back through your intake and charge lines and gumming them up with oil and soot.
Mouthpiece on an LLY is very restrictive, swapping it out for an LBZ, Kodiak or AFE helps the turbo breathe a little better.
What year truck are you running??
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#5 permalink Junior Member
Join Date: Oct 2009
Posts: 12
2003 Chevy 2500 LB7
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#6 permalink Senior Member
Join Date: Feb 2009
Location: Vegas
Posts: 260
Quote:
Originally Posted by
shrummyboy 2003 Chevy 2500 LB7
You wont need the mouthpiece. There is some port work you can do the the IHI intake horn on yours to help it spool a little quicker.
Blocking egr is something you can do. 03 will have it.
edit: found some links, check these out.
Best tools to use for horn mod??? LB7 Turbo mouthpeice mod intake horn mod lb7
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Last edited by whitetrash21 : 10-22-2009 at 08:17 PM .
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#7 permalink Member
Join Date: Aug 2009
Location: Colorado Springs, CO
Posts: 82
I've got a mouthpiece for sale if you need one.
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2004.5 lly GMC CCSB 2500
AFE Stage 2, modded MP(soon AFE MP), Afe Boost tube
BD manifold, EGR block plate, Banks turbo back(no cat)
EFI Live by IDAHOROB w/ DSP5
Aeroforce Interceptor gauges
19.5 Rickson wheels W/ 225/70/19.5 drive/ steer
BD Flowmax Lift pump, auxiliary fuel filter PPE fprv shim
Bullydog shift enhancer/ Amsoil Race Trans Fluid
Amsoil Bypass Filtration 5w30 3000 HD Diesel oil
Cognito Motorsports Pitman/ Idler support kit
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#8 permalink Member
Join Date: Aug 2009
Location: Colorado Springs, CO
Posts: 82
Never mind that last post just seen what year your truck is.
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2004.5 lly GMC CCSB 2500
AFE Stage 2, modded MP(soon AFE MP), Afe Boost tube
BD manifold, EGR block plate, Banks turbo back(no cat)
EFI Live by IDAHOROB w/ DSP5
Aeroforce Interceptor gauges
19.5 Rickson wheels W/ 225/70/19.5 drive/ steer
BD Flowmax Lift pump, auxiliary fuel filter PPE fprv shim
Bullydog shift enhancer/ Amsoil Race Trans Fluid
Amsoil Bypass Filtration 5w30 3000 HD Diesel oil
Cognito Motorsports Pitman/ Idler support kit
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#9 permalink Member
Join Date: Aug 2008
Location: Angleton, TX
Posts: 62
This is the first time I saw mention of blocking the EGR on the LB7 Duramax. What does this do for you other than blocking off the return gasses?
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2003 GMC Dually, B&W Turnover Ball, Nothing else yet (still researching)
2009 39' Cedar Creek Silverback fifth wheel
2004 Featherlite 4-horse with Living Quarters
I won't buy foreign cars. I like my Cadillac! Oh, that GMC Dually rides like a Cadillac. The liberal, environmentalist can have my Duramax when they pry it out of my cold, dead hands!
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#10 permalink DuramaxForum Veteran
Join Date: May 2009
Location: 609 new jersey
Posts: 4,044
Quote:
Originally Posted by
Tigger This is the first time I saw mention of blocking the EGR on the LB7 Duramax. What does this do for you other than blocking off the return gasses?
only some lb7's will have egr...if you do have it it keeps your intake clean by blocking all the soot and also keeps the temp of combustion gasses down for a tad more power at part throttle..
after all exhaust gas is pretty hot so breathing it is bad
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LLY Cc/sb 4x4
RED Quote:
Originally Posted by Sean S
right they just show n' shine aint spoolin that turbine
Quote:
Originally Posted by McRat
I think the Cummins guys are already datalogging in a very sophisticated manner:
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im knew to diesels and ive seen alot of yall say buy a egr lock off (i understand that) and buy a mouth piece, what are yall talking about?
EFI Live by IDAHOROB w/ DSP5 
right they just show n' shine aint spoolin that turbine
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