[SBCNX20]

I realize that it is difficult to steady all variables, but I just want to point out an observation. All the "after" runs are performed under heat soak conditions, progressively. If you logged IAT, and can post that, this will be more evident. It is well documented that heat soak and reduced MAF from rarified conditions leads to underperformance. IMO, these results are a little conservative from this perspective.

Nice effort, thanks Demp.

Yep, I agree it should be accounted for.

Oops forgot to say Thanks Demp and nice job.

 

[heavenbound]

Demp, thanks for doing this!!!!

 

[Horsehaulin]

Good work, looks like it will be a good thing for an engine with a bad reputation. Thanks for doing this.

 

[rebel7777]

Thanks demp, awesome results, my "BUTT" Meter was right on the money

 

[way_out_there]

Thanks demp!

It looks like the numbers are more along the lines of what I expected. I'm a hot rodder: I've worked on and had/have cars that I've done a ton of work on. I think I have a good sense of 'feel' when gains are made, and was quite sure there would have been more seat of the pants feel if there was indeed these 35-40hp gains that were claimed. I've achieved those type of gains on other vehicles, and the effects were noticed immediately. Of course, those vehicles weighed less than half of what these trucks weigh


Demp,

Like Rick D Lance, I'm still willing to contribute towards your dyno time. Or, if you or the general public here wants another set of numbers to chew on, I will work on getting a price for dyno time. Earliest I can get on the dyno now will be 3/23.

Thanks again!

 

[hihosilver]

x100 thanks for info, I call it free hp cause for the price of the mod it does what it was supposed to do!!

 

[demp223]

I realize that it is difficult to steady all variables, but I just want to point out an observation. All the "after" runs are performed under heat soak conditions, progressively. If you logged IAT, and can post that, this will be more evident. It is well documented that heat soak and reduced MAF from rarified conditions leads to underperformance. IMO, these results are a little conservative from this perspective.

Nice effort, thanks Demp.

I did not log IAT I just checked them before pull and it was same as OAT.
I concentrated more on EGT and time to peak temp.
We all know heat degrades performance.
And thats why I purposely ran the runs in the order I did.I wanted to give the stock LLY the best(coolest) temps to work with and the Kodiak the highest to see how well it performed.
LLY mp with hottest tune got the coolest ECT,OAT,Trans temps,Fuel temps.
Kodiak mp hottest tune got the hottest temps.
Stock tunes were kept back to back as that was the test most important and needed to keep variables as close as possible.
I posted average gain instead of peak gains as you can see some runs were almost identical and feel that average gain is more realistic.

LLY mp 120 hp tune,coolest temps of day,first to test
==== =============Pull 1==372.6hp @ 2750 rpm==753.6tq @ 2500 rpm
=============Best= Pull 2==395.8hp @ 3000 rpm==790.7tq @ 2500 rpm
================= Pull 3==395.8hp @ 3000 rpm==789.5tq @ 2500 rpm

LLY mp stock tune.====Pull 4==259.9hp @ 3000 rpm==484.21tq @ 2250 rpm
=================Pull 5==261.8hp @ 3000 rpm==498.36tq @ 2250 rpm
=============best=Pull 6==262.0hp @ 3000 rpm==498.9 tq @ 2250 rpm

Kodiak mp stock tune===Pull 7==264.9hp @ 3000 rpm==493.21tq @ 2250 rpm
==================Pull 8==265.9hp @ 3000 rpm==496.47tq @ 2250 rpm
==============best=Pull 9 ==266.4hp @ 3000 rpm==506.2tq @ 2250 rpm


Kodiak mp 120 tune,hottest temps especially fuel.Last test run
=========Best=Pull 10==395.4hp @ 2750 rpm==795.6tq @ 2500 rpm
=============Pull 11==391.4hp @ 3000 rpm==787.2tq @ 2500 rpm
=============Pull 12==389.9hp @ 3000 rpm==787.7tq @ 2500 rpm

The reduction in EGT along with power increase from this SIMPLE little cost effective swap is impressive.

 

[Tutts]

Nice, again thanks for the results. It is nice to finally have some numbers to dis spell a lot of speculation, although the discussion was interesting.

 

[Diesel_Day_Dreamin]

Thanks for posting your numbers... I thought it would be a little more then you had seen, but then I have the complete LBZ intake tract.

The curiosity is getting to me now. I will have to check my local dyno shop to see if they would do my truck now. Being a ricer tune shop, could their dyno accommodate the torque of a diesel?

 

[demp223]

Thanks for posting your numbers... I thought it would be a little more then you had seen, but then I have the complete LBZ intake tract.

The curiosity is getting to me now. I will have to check my local dyno shop to see if they would do my truck now. Being a ricer tune shop, could their dyno accommodate the torque of a diesel?

You have to ask.A few that I checked with couldnt handle torque let alone size of truck.Needed to pull off outside duals.
Imlers dyno just rolled truck right on up with about 8 inches on each side.

 

[way_out_there]

Demp,

Check your e-mail, you have a few $ sent your way!

Thanks again for taking the time to test this. Have a few beers on me!!!


Out of curiousity, how much time did all your pulls take?

 

[demp223]

Demp,

Check your e-mail, you have a few $ sent your way!

Thanks again for taking the time to test this. Have a few beers on me!!!


Out of curiousity, how much time did all your pulls take?

Almost 1 hr exactly. Appx 12 min break between each set and appx 1 min per pull.
After that we did pulls with boost stick and a few 1/4 mile simulation 2wd pulls.
Thanks again.Very much appreciated. Tri tip BBQ tonight!!!

 

[RickDLance]

Sorry, I couldn't send more.

Guys step up and make sure he at least gets his expenses covered. He did this to help all of us.

 

[briano]

man, I never had folks reimburse me for anything I've done in the past 5 years for the group. that sure is nice to be appreciated. thanks again for the effort Demp

 

[jtw]

great job I don't care about the hp/torque gains its the egt reductions that have me excited

 

[killerbee]

...wants another set of numbers to chew on, I will work on getting a price for dyno time. Earliest I can get on the dyno now will be 3/23.

Thanks again!

if you do it above 6000 ft elevation, and can use a tune I provide, then I will pay half.

I am repeating myself, but I want to stress that on a dyno run like this, we don't see the best aspect of this mod...the compression heat reduction to the induction process, and the turbo shaft rpm reduction.

IMO

 

[Rttoys]

if you do it above 6000 ft elevation, and can use a tune I provide

I and many others understand the 6000' thing, because things change at elevation, but forget the tune. Most people don't want to retune their trucks. They want to put a part on and roll with it. That's why most don't use the entire LBZ intake system, it requires a MAF remap and most people don't want to jack with that.

Also, re-tuning is skewing the results of the part. Anything can be done when you are jacking with tuning. It's kind of like accepting Berry Bonds homerun records.

demp, did about as accurate of a test as he could, which you should of done to begin with : stock mouthpiece/intake vs. moded mouthpiece/intake, nothing else. The numbers are what they are and that's what you report. Then, if you want to come back and add tuning to the mix and report that, that's fine, but don't try to preach that result as gospel. That's how you get all the 'speculation' out there.

5hp is much different than 30hp

 

[Diesel_Day_Dreamin]

I and many others understand the 6000' thing, because things change at elevation, but forget the tune. Most people don't want to retune their trucks. They want to put a part on and roll with it. (exactly) That's why most don't use the entire LBZ intake system, it requires a MAF remap and most people don't want to jack with that.

Also, re-tuning is skewing the results of the part. Anything can be done when you are jacking with tuning. It's kind of like accepting Berry Bonds homerun records.

demp, did about as accurate of a test as he could, which you should of done to begin with : stock mouthpiece/intake vs. moded mouthpiece/intake, nothing else. The numbers are what they are and that's what you report. Then, if you want to come back and add tuning to the mix and report that, that's fine, but don't try to preach that result as gospel. That's how you get all the 'speculation' out there.

5hp is much different than 30hp

Since I have the complete LBZ setup, I am seeking out a dyno to test mine. I cannot revert back to stock at this point (GM kept my old parts under warranty), but can get a base number with the LBZ setup in place. I have no cat though, so the numbers may be slightly skewed (if even noticable), for I have the MBRP 4'' exhaust with cat delete pipe installed. I will also be glad to post my numbers. We are at about 450' elevation here, and the testing would be below 1000'.

 

[way_out_there]

man, I never had folks reimburse me for anything I've done in the past 5 years for the group. that sure is nice to be appreciated. thanks again for the effort Demp

briano,

Sorry to hear that. I might have missed some of your work, or the subject was one I passed over, or I'd have sent something your way. Don't stop experimenting and sharing results; there might be more of me out there that are willing to contribute, since you will have saved us so much time by doing the testing.

Now ya got me thinking, and I'm gonna dig thru here and see what you've all done!

 

[demp223]

Thanks again to those that donated and to Duramaxdave for shipping me his stock LLY mp. Without it I wouldnt have been able to compare.
This site and its members are full of great info and am glad to help as it has provided me with many great improvements to my truck.