White Lightning's new engine break in on the engine dyno/turbo testing!

MarkBroviak

MarkBroviak

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May 25, 2008
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Danville Indiana
I figured I would post this up on here since it is pretty interesting stuff. I built a new motor for White Lightning with some help from Guy at SoCal:hug:, Exergy Performance, John (Fingers) and of coarse my shop. I was nervous about having another stock crank fail during my up coming 1/2mile race so we decided on a new block fitted with a SoCal/Bryant Extra Narrowed Rod Journal billet crank and Carillo rods with 15:5Comp Oval Race cast pistons. Oringed the block and used 625+studs in SoCal stg2 heads and the new 9200AF SoCal cam! I'm running Exergy 250%inj and 14mmCp3. So to break it in and try to get it sealed up before throwing my triple setup back on it and going full potato I decided to throw a stock LMM core turbo on it and let it eat. Then I decided I should set it up with a dsp5 and then change turbos to show you guys what the differences are and what it actually does for you. So with the stock LMM turbo it did the following-

Tune1 435Hp 781ftlbs 25psi boost 1300degrees max
945us 14degrees
Tune2 495Hp 941Ftlbs 29psi boost 1500degrees Max
1130us 16degrees
Tune3 520hp 1033ftlbs 31psi boost 1600degrees Max
1175us 17.5degrees
Tune4 550hp 1105ftlbs 33psi boost 1670degrees Max
1310us 19degrees
Tune5 450hp 850ftlbs 30psi boost 1400degrees Max Way over fueled!
1525us 20degrees

Next turbo will be a 2.5Stg1 I think or I may just jump to my stg2 and I will just go up through my turbo line up and post the results as I do it over the next week or so. I will leave the fueling alone and only change the vane tuning when needed. I have a set load file for the dyno which is a 1800rpm to 3700rpm sweep over 15 seconds so it is good and loaded the entire time. Here is the video from tune 3 from outside. I will also post a picture of the dyno sheet with the runs on it. Hope you guys enjoy this. Stay tuned!


https://www.youtube.com/watch?v=-U4qlAZJi-w
 
Dozerboy

Dozerboy

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Jun 23, 2009
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550hp on a engine dyno is there some sort of corection in that? I though without driveline loss it would max out over 600.

Sent from my SAMSUNG-SM-G900A using Tapatalk
 
MarkBroviak

MarkBroviak

DMax Junkie
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May 25, 2008
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Dozerboy said:
550hp on a engine dyno is there some sort of corection in that? I though without driveline loss it would max out over 600.

Sent from my SAMSUNG-SM-G900A using Tapatalk
Click to expand...

I would also agree with you on that! This is no correction factor at all and my engine dyno is one of the worse if you are looking for big numbers, you have to really earn them here! The rest of it I am sure is my motor and fuel combo because the injectors are so damn big for the poor little turbo but it makes for a great baseline to go off of. I'm really not worried about the numbers just the difference when the parts are changed.
 
MarkBroviak

MarkBroviak

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May 25, 2008
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Danville Indiana
So round two tonight I went ahead and grabbed a used BMW2.5 Stg2 off the floor in my turbo shop that is 4 years old and left everything else the same. Here are the numbers and I got a video from inside the dyno room also.

Recap Stock LMM Core turbo
Tune1 435Hp 781ftlbs 25psi boost 1300degrees max
945us 14degrees
Tune2 495Hp 941Ftlbs 29psi boost 1500degrees Max
1130us 16degrees
Tune3 520hp 1033ftlbs 31psi boost 1600degrees Max
1175us 17.5degrees
Tune4 550hp 1105ftlbs 33psi boost 1670degrees Max
1310us 19degrees
Tune5 450hp 850ftlbs 30psi boost 1400degrees Max Way over fueled!
1525us 20degrees

BMW 2.5 Stg2 LLY based turbo

Tune 1 482hp 843ftlbs 26psi boost 1400*

Tune 2 532hp 950Ftlbs 29psi boost 1500*

Tune3 563Hp 1001ftlbs 31psi 1600*

Tune 4 604hp 1093ftlbs 33psi 1650*

Tune 5 645hp 1240ftlbs 35psi 1650*

So basically without any tuning changes we picked up roughly 35-50hp on each level with the turbo swap. If I was to change the tuning to go with the turbo I know it would pick up more but that isn't my goal here so I'm happy with the results. FYI the Tune5 corrected numbers are 705hp 1350ftlbs because it is 90* in the dyno room tonight! I went back and looked at all the runs tonight and its basically 50hp correction across the board. This is why I use the raw uncorrected data because it does swing soo much like the corrected does and makes testing much better when you are trying to be as consistant as possible with the data. Next turbo is a BMW65mmstg2 I have sitting here, very interested to see how the 2mm increase in inducer changes the numbers...Stay tuned!:thumb:

FYI-I have done and engine on here and then installed it into the truck and chassis dynod it and I saw a 12% drop in HP and a 24% drop in torque.

https://www.youtube.com/watch?v=yR4CbuMSmAA
 
Last edited:
2004LB7

2004LB7

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Dec 15, 2010
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MarkBroviak said:
FYI-I have done and engine on here and then installed it into the truck and chassis dynod it and I saw a 12% drop in HP and a 24% drop in torque.
Click to expand...

was this for the lowest tune, highest or all? I've heard it was 20%, never believed it. also it has been stated that the % stays the same regardless of how much HP its making. this also doesn't make any sense either. should be a constant number or pretty close i would think. 12% of 100 HP is 12 HP, 12% of 1000 HP is 120 HP.

look forward to your input
 
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