S&B intake & LBZ inlet elbow on 71mm Cheetah WOW [Archive] - Duramax Diesels Forum

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othrgrl
08-20-2008, 09:48 PM
To start, my mods can be found in my sig, except up until tonight I was running a stock LLY airbox (cut out the front of the box, the plastic behind the headlight and the fender to get more air) and turbo inlet elbow. With my 71mm Cheetah, 45% injectors and LBZ CP3 I had rough tuning (thanks Larry for the boost and vane tables) on it for a week and was working out the kinks little by little. I ran a handful of 12.8s with it and was only seeing 36PSI of boost and was burying the pyro (1600*) quick and leaving a haze down the track. Tonight I installed the LBZ turbo inlet elbow and my custom Diesel Addiction edition LBZ S&B intake. I cut out the area under the box like an LBZ has but didn't cut the box at all. On the way home from Winston's it finally split to 2 lanes after being stuck behind a slow van for miles and I rolled into the throttle - the boost shot to 35 quick and then by the time I got to 75% throttle boost was at 50 PSI and I let out of it (still have a stock bottom end). The rest of the way home I was having fun watching the boost gauge - it hits 40 as soon as you give it a little pedal and if you give it a good bit of pedal it shoots to 46 and holds it until you give it more then it goes to 50 depending on RPM. The top end has opened up so much it's ridiculous - I was slowing to 45mph then rolling into and watching the boost and EGT gauges for a few seconds while being pinned pretty good in the seat then look back at the speedo and I would be at 90.

Now for the awesome EGT news - like I said before it would bury 1600* quick. Tonight I would roll into it and watch boost vs EGT - at a steady 40psi it held 1000*; 45psi gave me almost 1200*; cruising it dropped from 700+* before to 500-550* now depending on speed; and in a flat out WOT throttle run it got up to 1400* and then dropped to just over 1300* and held it. This is all on the same exact hot tune that was only getting 36psi max and burying the pyro quick. I need to play around tomorrow to see how much it cleaned up my smoke. I did one 4WD boosted launch and it held 46psi and felt alot faster than my 12.8 runs - it kept me pinned the whole time, not just off the line. I can see it doing 12.60 or better now. In 2WD you can forget traction up to 50mph - it spools and just lights the tires up, if you catch it at the right RPM it will light em up at 60mph with no downshift. Now it's time to talk to Larry about a drive pressure gauge setup so I can get it tuned to be as effecient as possible and I'm looking into race version log style headers and up-pipes to see what kind of gains they'll give me in effecient power.

It wasn't showing up good in the dark with the flash but here is what S&B etched in the lid (without the website):
http://www.mydieseladdiction.com/mediac/400_0/media/Complete$20Name$20$26$20Logo.jpg

LBZ
08-20-2008, 09:53 PM
That's awesome news. I really need to buy one of these!!

Turbo Buick 6
08-20-2008, 10:11 PM
I saw a LLY inlet for the first time in person the other day and....WOW:eek: They are much smaller than the LBZ. Thats crazy that it made that big of a difference:eek: Looks like you found what was holding her back:D

LBZrcks
08-20-2008, 10:18 PM
That's awesome news. I really need to buy one of these!!

intake or turbo?:confused:

LBZ
08-20-2008, 10:26 PM
Both I guess Jason. As soon as she gets into the 12's on the stocker, something else is getting bolted on.

Been thinking that maybe I should start buying parts to build a motor as well.....

othrgrl
08-20-2008, 11:18 PM
What tune are you running and what kind of 60's are you cutting? We have a customer with about the same mods (minus the lift kit and tires but with a SC IV) and I'm going to see how deep in the 12s I can get him.

But yeah I was in shock when I saw the boost gauge shoot up to 50 psi on a tune that was maxing out at 36 and the EGT drops were amazing as well. That LLY inlet elbow is like breathing through a straw compared to the LBZ's

NWTDIESEL
08-20-2008, 11:35 PM
Nice!

LBZ
08-20-2008, 11:46 PM
What tune are you running and what kind of 60's are you cutting? We have a customer with about the same mods (minus the lift kit and tires but with a SC IV) and I'm going to see how deep in the 12s I can get him.

I am running some custom Team Salad Tuning that has been tweaked by a couple different members here. I think my best 60 was 1.84 with a soft launch at like 10psi boost.

As soon as I make the 12's, I'm gonna focus on sled pulling though I think. I will drag race vicariously through Simon in the '01-unless he lets me drive it if we ever get it running.:D

Stingpuller
08-21-2008, 03:30 AM
I had the same problem on mine. I mod. the air box and seen the same thing. By chance did you figure it out on your own or did Brayden say something to you? Jeff

LarryJewell
08-21-2008, 04:43 AM
I've really enjoyed having the lbz inlet with the Banks LBZ CAI, The scoop had to be modified to fit with the larger tires and ranchhand bumper though :D

othrgrl
08-21-2008, 10:29 AM
I read the Killer Bee's thread HERE (http://www.duramaxdiesels.com/forum/showthread.php?t=2003); you can read about the effeciency gains everyone esle has seen with this mod. I bought the LBZ inlet elbow long before the Cheetah was ordered but I was waiting to get our Diesel Addiction logo finished so that I could have S&B lazer etch it in the cover for us and finally got it all on last night after driving with the Cheetah for a week (and racing at 2 tracks on 2 different nights) on the stock box.

tylerrustLB7
08-21-2008, 10:46 AM
Thats cool it changed it the much and your egt's are awsome! Nice looking truck by the way. :)

othrgrl
08-21-2008, 10:54 AM
I need to get new pictures up of the truck with it lowered, rear wheels spaced 2" and the plow mount and step bars off of it. I'll be installing a roll pan, making a hitch that's hidden behind it, removing my mudflaps and having the paint touched up that the mudflaps rubbed soon and will get pics after that. But thanks!

Turbotug
08-21-2008, 11:05 AM
WOW, huge differences!! Wish my EGTs would stay below 1400*..

Lot of good info in the induction thread! KB has assembled a "kit" that addresses the issues in it.

Check it out HERE (http://members.cox.net/beekiller/GMC%20Light%20Duty/Duramax%20Cooling%20Aids.doc).

jrad12381
08-22-2008, 12:01 PM
To start, my mods can be found in my sig, except up until tonight I was running a stock LLY airbox (cut out the front of the box, the plastic behind the headlight and the fender to get more air) and turbo inlet elbow. With my 71mm Cheetah, 45% injectors and LBZ CP3 I had rough tuning (thanks Larry for the boost and vane tables) on it for a week and was working out the kinks little by little. I ran a handful of 12.8s with it and was only seeing 36PSI of boost and was burying the pyro (1600*) quick and leaving a haze down the track. Tonight I installed the LBZ turbo inlet elbow and my custom Diesel Addiction edition LBZ S&B intake. I cut out the area under the box like an LBZ has but didn't cut the box at all. On the way home from Winston's it finally split to 2 lanes after being stuck behind a slow van for miles and I rolled into the throttle - the boost shot to 35 quick and then by the time I got to 75% throttle boost was at 50 PSI and I let out of it (still have a stock bottom end). The rest of the way home I was having fun watching the boost gauge - it hits 40 as soon as you give it a little pedal and if you give it a good bit of pedal it shoots to 46 and holds it until you give it more then it goes to 50 depending on RPM. The top end has opened up so much it's ridiculous - I was slowing to 45mph then rolling into and watching the boost and EGT gauges for a few seconds while being pinned pretty good in the seat then look back at the speedo and I would be at 90.

Now for the awesome EGT news - like I said before it would bury 1600* quick. Tonight I would roll into it and watch boost vs EGT - at a steady 40psi it held 1000*; 45psi gave me almost 1200*; cruising it dropped from 700+* before to 500-550* now depending on speed; and in a flat out WOT throttle run it got up to 1400* and then dropped to just over 1300* and held it. This is all on the same exact hot tune that was only getting 36psi max and burying the pyro quick. I need to play around tomorrow to see how much it cleaned up my smoke. I did one 4WD boosted launch and it held 46psi and felt alot faster than my 12.8 runs - it kept me pinned the whole time, not just off the line. I can see it doing 12.60 or better now. In 2WD you can forget traction up to 50mph - it spools and just lights the tires up, if you catch it at the right RPM it will light em up at 60mph with no downshift. Now it's time to talk to Larry about a drive pressure gauge setup so I can get it tuned to be as effecient as possible and I'm looking into race version log style headers and up-pipes to see what kind of gains they'll give me in effecient power.

It wasn't showing up good in the dark with the flash but here is what S&B etched in the lid (without the website):
http://www.mydieseladdiction.com/mediac/400_0/media/Complete$20Name$20$26$20Logo.jpg

Sounds awesome! Just curious did you see much of a fuel mileage change when you added the larger nozzles, and the cheetah? Have you had a chance to do any dyno runs yet with this setup?

othrgrl
08-23-2008, 10:24 AM
Haven't done any dyno runs and my fuel mileage is still about the same - maybe a little better than before. I did run it at the track last night with the same exact tuning and truck setup that I ran 2 weeks ago on the stock intake and inlet. With stock I had a best of 12.85 @ 104 with a handful of other 12.8X runs. Last night I ran 2 back to back 12.53 @ 107 runs my first runs of the night. I was shocked to get .32 seconds and 3 mph out of an intake upgrade :eek: Wish I would have done it before I did the turbo and injectors, I could have had a stock motor LLY in the 12s.

I didn't get to keep playing with my tuning last night because I was busy getting a customer's LBZ in the 12s. He has a Diesel Addiction SC IV, 1054, T-case brace, spring clamps, sleeves and center-link, 5" exhaust and transmission and engine tuning by me. He ran a 12.95 @ 101; that's right completely stock fuel system - no lift pump, shim kit, or race valve.

jrad12381
08-23-2008, 12:21 PM
How much do you feel you have left on the tuning on your setup? Do you feel you can break into the 11's on diesel only?

Killerbee
08-23-2008, 01:51 PM
I was shocked to get .32 seconds and 3 mph out of an intake upgrade :eek: Wish I would have done it before I did the turbo and injectors, I could have had a stock motor LLY in the 12s.



not shocked here.:)

othrgrl
08-23-2008, 02:31 PM
With tuning I think I might be able to get it down to 12.4s pretty easy, but this tune I have now is running awesome. If I mod my CP3 or get a wicked diesel CP3 a I could get more. Cheater slicks will probably be next and I'm looking into the race version log headers and up-pipes. I can't launch any harder or I sit and spin all 4 without moving more than a few feet. I'm still on stock bottom end and don't really want to do the CP3 and add more fuel right now. But I could see 11s with cheater slicks, headers, up-pipes, and some more tuning. It won't get sprayed until after it's built - if ever.

Killerbee
08-23-2008, 02:37 PM
If it was optimized before, you now have more MAF than before. You might want to either up the fueling, OR reduce the boost 2-4 psi. Perhaps advance the timing 2-4 degrees also for the cooler charge.

my 2 cents

othrgrl
08-24-2008, 07:44 AM
It wasn't at all optimized before. I need to get a 5 volt boost sensor from autometer that can read up to 100psi and then rescale the sensor voltage table with EFI Live. Right now my boost sensor just gets maxed out and I have to tune it through the max vane table. The timing on my hot tune seems to be about dead on - some of my other tunes in DSP still need timing pulled out - running 45% injectors I am running very low PW and have to pull back timing to make up for how much faster I'm getting the fuel delivered.

A_T_Ver
08-27-2008, 11:07 AM
I got an LBZ mouthpiece on the way, i have an LLY intake on right now and still have my stock intake. Surely between the 2 i can get it hooked up right? I don't want to have to buy an LBZ intake just for that.

Killerbee
08-27-2008, 11:53 AM
You can use your stock intake. There is NO advantage in using the LBZ intake box, as long as your fan remains off. A good CAI will benefit most people who do a lot of stop-go type racing or staging. You can watch IAT rise while you are just sitting there.

othrgrl
08-31-2008, 10:41 AM
Well I said I could easily hit 12.4s with tuning and Friday night I hit 12.44 with only a couple small tweaks. Next week maybe I'll hit 12.3s. This is still on the worn out BFG ATs and no headers or up-pipes yet. Once again didn't have time to keep tweaking on the tune cause this time I was helping an LB7 customer get in the 12s on stock motor - 12.97 his second pass ever at a track, not too shabby.

Cougar281
08-31-2008, 07:04 PM
It wasn't at all optimized before. I need to get a 5 volt boost sensor from autometer that can read up to 100psi and then rescale the sensor voltage table with EFI Live. Right now my boost sensor just gets maxed out and I have to tune it through the max vane table. The timing on my hot tune seems to be about dead on - some of my other tunes in DSP still need timing pulled out - running 45% injectors I am running very low PW and have to pull back timing to make up for how much faster I'm getting the fuel delivered.

How high can the stock boost sensor read? I'm guessing about 50MAP since that's what the boost sensor scaler has in the tune?

Killerbee
08-31-2008, 07:05 PM
It is 3 bar, so around 45.

Turbo Buick 6
08-31-2008, 07:15 PM
It is 3 bar, so around 45.

All 3 bar maps I have used could see about 45psia, so about 30psi on a boost guage. Running 0 bar would be an absolute vacume. From what I have used your first bar is used up from atmospheric pressure. Correct:confused:

slowlmm
08-31-2008, 07:26 PM
38.5 psi is all mine would read max verified whith my mechanical boost guauge read 42

Turbo Buick 6
08-31-2008, 07:45 PM
A long time ago I had a Bully Dog outlook and that would only read up to 29psi

othrgrl
09-01-2008, 10:59 AM
The stock gauge reads to 45 psi absolute so here that is 30 psi of boost while I am seeing 50 on the gauge.