Duramax Diesels Forum Truck of the Week
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Old 01-10-2009, 05:35 PM
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Default Mod to turbo intake horn

Just a little test I finally preformed on a another LB7 to try to help with air flow to the stock turbo. The owner had great reviews on the mod. Said it spooled up much quicker and much harder. I need to get my reg and suction pump mod done on it next to help more. I cant believe GM did this. It's choking the turbo down. The tube exits into the turbo at 2.430". I opened it up to about 2.780" and put a 1/4 radius on the lip where it goes into the charger. We haven't done extensive testing on it yet, but it looks VERY promising for guys with stock chargers that want a little more. What do you think?
Attached Images
File Type: jpg LB7 turbo intake horn 001.jpg (453.7 KB, 904 views)
File Type: jpg LB7 turbo intake horn 002.jpg (509.3 KB, 743 views)
File Type: jpg LB7 turbo intake horn 003.jpg (430.7 KB, 694 views)
File Type: jpg LB7 turbo intake horn 004.jpg (460.4 KB, 681 views)
File Type: jpg LB7 turbo intake horn 005.jpg (534.6 KB, 720 views)
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CC LB7 4X4 Dually GMC with Fluidyne oil cooler
CC LLY 4X4 3500 SRW with oil cooling coming (stock with a few goodies)
Currently for street driving and towing GT4202 and Dual Fueler from PPE
Carrillo rods, Heads, balancing, cut pistons, Head studs, Injector clamps from Guy at SoCal
Tune by Tony at Ridge Runner (Clark Kent special)
Moded LBZ CP3s and special fuel system by Super Diesel
SC Trans w/snake oiler and cooler by Mike L.
Blowoff and Wastegate by Tial
Various machining touches, built and fabed by Super Diesel
Broke motor #2 becomes built motor #4
New motor and trans oil purifiers available (dual and single elements) and vital fluid cooling components. Start saving your truck today!
SUPER DIESEL 720-404-7553 Please leave message if no answer.

Last edited by super diesel; 01-10-2009 at 05:40 PM.
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Old 01-10-2009, 07:37 PM
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looks like a good improvment . what did you use to open it up with?
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Old 01-10-2009, 07:42 PM
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Where do I send the check Michael? It's about time you got your ass back into development.
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Old 01-10-2009, 07:56 PM
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X2, what did you use? I knew of this but i noticed that by opening it up, looks like airflow would go into the void around the inducer? so i left it alone. Seems opening it up and how bout a bushing sandwiched between to flow uninterupted into the compressor would be a hot trick? Thanks for posting, i might take on this endevor too!
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Old 01-10-2009, 08:01 PM
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This was no fun to set up to cut (need a jig). I have a machine shop (regained after every thing was stollen), and I just bored it (very carefully). I'll get a few made up to send out and do an exchange program. PM sent Mikey.
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FOR REAL POWER: Remove the static wire from ovulation bearing and let her run!
McRat Racing, SoCal Diesel, Ridge Runner, Mike L. Special, PPE, Creatures of the Night Performance

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OIL COOLING CLUB

CC LB7 4X4 Dually GMC with Fluidyne oil cooler
CC LLY 4X4 3500 SRW with oil cooling coming (stock with a few goodies)
Currently for street driving and towing GT4202 and Dual Fueler from PPE
Carrillo rods, Heads, balancing, cut pistons, Head studs, Injector clamps from Guy at SoCal
Tune by Tony at Ridge Runner (Clark Kent special)
Moded LBZ CP3s and special fuel system by Super Diesel
SC Trans w/snake oiler and cooler by Mike L.
Blowoff and Wastegate by Tial
Various machining touches, built and fabed by Super Diesel
Broke motor #2 becomes built motor #4
New motor and trans oil purifiers available (dual and single elements) and vital fluid cooling components. Start saving your truck today!
SUPER DIESEL 720-404-7553 Please leave message if no answer.
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Old 01-10-2009, 08:07 PM
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What do you think about a bushing to smooth airflow into the compressor?
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PLAN-B...Replacment of the Ally for a 5spd Bruno/Lenco
03 2500HD......Custom Compound Twins, this winter maybe sooner?
Ind. Injection Dual Feed Line, BD/TiAL BOV, BD Fullbore, FS-2500,
Coolingmist Stage2 M/W, TTS fuel pick-up, S&B intake, 6" exh, In-cab boost control

50% ExtrudeHone nozzles, Modded CP3, MytNasty Tuned
Summit Billet LP, Intake Heater Delete EFILive V2
LOWERED,Hehehe TEAM BORROWED TIME, Member #12
Ghostly Lucky #13

Newest DD: 87' M-B 300D W124 OM603 3.0L 12v SOHC I-6, Stock turbo. Just cranked ALDA and a gutted kitty. Reasonably quick and bone stock! Future plans: OM606 24v I-6, big turbo, DervTuning 7.5mm Bosch M-pump, exhaust, 5spd, intercooler, fab'd intake, Some cosmetic work. Diesel isn't just a fuel, its a way of life...
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Old 01-10-2009, 08:53 PM
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I don't know about the bushing. This pretty much smooths it out and helps the transition for the air. The next ones will have a larger transition for the radius. This and the CP3 regulator with suction pump mod (some will remember me starting this back in early 05) is awesome power mods for stock looking trucks (reg on moded trucks as well). We don't know how many HP these all add together over a stocker (comparable mods). One thing we do know. Both as individual mods decrease spool up time noticably and we found out back in 05 the reg moded offered increased HP and even more in the torque department. This intake mod was very noticable to the driver through the powerband. He said it spooled quicker too (stands to reason because the stocker intake is basicly a turbo bushing reducer. This truck testing it is a manual 6 speed, and it is importaint to him to reduce lag. He said he was happy.
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FOR REAL POWER: Remove the static wire from ovulation bearing and let her run!
McRat Racing, SoCal Diesel, Ridge Runner, Mike L. Special, PPE, Creatures of the Night Performance

Michael
OIL COOLING CLUB

CC LB7 4X4 Dually GMC with Fluidyne oil cooler
CC LLY 4X4 3500 SRW with oil cooling coming (stock with a few goodies)
Currently for street driving and towing GT4202 and Dual Fueler from PPE
Carrillo rods, Heads, balancing, cut pistons, Head studs, Injector clamps from Guy at SoCal
Tune by Tony at Ridge Runner (Clark Kent special)
Moded LBZ CP3s and special fuel system by Super Diesel
SC Trans w/snake oiler and cooler by Mike L.
Blowoff and Wastegate by Tial
Various machining touches, built and fabed by Super Diesel
Broke motor #2 becomes built motor #4
New motor and trans oil purifiers available (dual and single elements) and vital fluid cooling components. Start saving your truck today!
SUPER DIESEL 720-404-7553 Please leave message if no answer.

Last edited by super diesel; 01-10-2009 at 08:55 PM.
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Old 01-10-2009, 09:03 PM
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Nice work
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Old 01-10-2009, 09:07 PM
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Nice work
Thanks for the kind words. Thank you much. I'm just sorry to say that I'm quite a few years over due on this one sad to say.
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FOR REAL POWER: Remove the static wire from ovulation bearing and let her run!
McRat Racing, SoCal Diesel, Ridge Runner, Mike L. Special, PPE, Creatures of the Night Performance

Michael
OIL COOLING CLUB

CC LB7 4X4 Dually GMC with Fluidyne oil cooler
CC LLY 4X4 3500 SRW with oil cooling coming (stock with a few goodies)
Currently for street driving and towing GT4202 and Dual Fueler from PPE
Carrillo rods, Heads, balancing, cut pistons, Head studs, Injector clamps from Guy at SoCal
Tune by Tony at Ridge Runner (Clark Kent special)
Moded LBZ CP3s and special fuel system by Super Diesel
SC Trans w/snake oiler and cooler by Mike L.
Blowoff and Wastegate by Tial
Various machining touches, built and fabed by Super Diesel
Broke motor #2 becomes built motor #4
New motor and trans oil purifiers available (dual and single elements) and vital fluid cooling components. Start saving your truck today!
SUPER DIESEL 720-404-7553 Please leave message if no answer.
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Old 01-10-2009, 09:11 PM
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Quote:
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Thanks for the kind words. Thank you much. I'm just sorry to say that I'm quite a few years over due on this one sad to say.
Better late than never, saddly many of us have more importent things in our life than trucks
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Old 01-10-2009, 11:16 PM
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Quote:
Originally Posted by super diesel View Post
This was no fun to set up to cut (need a jig). I have a machine shop (regained after every thing was stollen), and I just bored it (very carefully). I'll get a few made up to send out and do an exchange program. PM sent Mikey.
Glad you got everything back Michael
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Old 01-10-2009, 11:24 PM
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Looks good!
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Old 01-11-2009, 05:33 AM
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Quote:
Originally Posted by super diesel View Post
Just a little test I finally preformed on a another LB7 to try to help with air flow to the stock turbo. The owner had great reviews on the mod. Said it spooled up much quicker and much harder. I need to get my reg and suction pump mod done on it next to help more. I cant believe GM did this. It's choking the turbo down. The tube exits into the turbo at 2.430". I opened it up to about 2.780" and put a 1/4 radius on the lip where it goes into the charger. We haven't done extensive testing on it yet, but it looks VERY promising for guys with stock chargers that want a little more. What do you think?
hmm havent looked at mine..

what is the opening on the compressor cover?
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Old 01-11-2009, 08:33 AM
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Originally Posted by malibu795 View Post

what is the opening on the compressor cover?

I can't remember Adam. I'll have to go out to the shop and measure it. I forgot the dim. It's around 3.150 dia. To many other things going on. I'm going to make a new intake mount as well that will replace this altogether and a larger intake can be hooked up for hopefully even better gains.
__________________
FOR REAL POWER: Remove the static wire from ovulation bearing and let her run!
McRat Racing, SoCal Diesel, Ridge Runner, Mike L. Special, PPE, Creatures of the Night Performance

Michael
OIL COOLING CLUB

CC LB7 4X4 Dually GMC with Fluidyne oil cooler
CC LLY 4X4 3500 SRW with oil cooling coming (stock with a few goodies)
Currently for street driving and towing GT4202 and Dual Fueler from PPE
Carrillo rods, Heads, balancing, cut pistons, Head studs, Injector clamps from Guy at SoCal
Tune by Tony at Ridge Runner (Clark Kent special)
Moded LBZ CP3s and special fuel system by Super Diesel
SC Trans w/snake oiler and cooler by Mike L.
Blowoff and Wastegate by Tial
Various machining touches, built and fabed by Super Diesel
Broke motor #2 becomes built motor #4
New motor and trans oil purifiers available (dual and single elements) and vital fluid cooling components. Start saving your truck today!
SUPER DIESEL 720-404-7553 Please leave message if no answer.

Last edited by super diesel; 01-11-2009 at 09:23 AM.
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Old 01-11-2009, 08:34 AM
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Quote:
Originally Posted by Kat View Post
Glad you got everything back Michael
Not everything back yet, but hopefully soon. Thanks Kat.
__________________
FOR REAL POWER: Remove the static wire from ovulation bearing and let her run!
McRat Racing, SoCal Diesel, Ridge Runner, Mike L. Special, PPE, Creatures of the Night Performance

Michael
OIL COOLING CLUB

CC LB7 4X4 Dually GMC with Fluidyne oil cooler
CC LLY 4X4 3500 SRW with oil cooling coming (stock with a few goodies)
Currently for street driving and towing GT4202 and Dual Fueler from PPE
Carrillo rods, Heads, balancing, cut pistons, Head studs, Injector clamps from Guy at SoCal
Tune by Tony at Ridge Runner (Clark Kent special)
Moded LBZ CP3s and special fuel system by Super Diesel
SC Trans w/snake oiler and cooler by Mike L.
Blowoff and Wastegate by Tial
Various machining touches, built and fabed by Super Diesel
Broke motor #2 becomes built motor #4
New motor and trans oil purifiers available (dual and single elements) and vital fluid cooling components. Start saving your truck today!
SUPER DIESEL 720-404-7553 Please leave message if no answer.
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