Was on the biggest tune and I feel the same way about it but it's not easy to test honestly. I think it is a percentage but not linear.
White Lightning's new engine break in on the engine dyno/turbo testing!
- Thread starter MarkBroviak
- Start date
Was on the biggest tune and I feel the same way about it but it's not easy to test honestly. I think it is a percentage but not linear.
Sorry that I haven't added anything but I did the BMW65mmStg2 LBZ with the LBZ sized 10-blade turbine and started the testing only to have an issue with the dyno itself and that stopped my testing in it's tracks last week. The nitty gritty info is that dropping the turbine size cost me 10hp across the board and bumped the egt's up about 50-75*. I am going to try and get the dyno fixed and continue but I'm running out of time as my race is in two weeks and I need to get it finished and back in the truck and some miles on it. Regardless I will continue the testing with it on this motor or I will grab another one.
EDIT!
Well, took the control valves apart and got them fixed and re ran this turbo(It is actually the same turbo that I run everyday on my LML) tonight and with the dyno working correctly the numbers are different than before. So Here it is.
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*
BMW65mm Stg2 LBZ Reman
Tune1 473hp 830Ftlbs 25psi 1500*
Tune2 532Hp 960Ftlbs 30psi 1600*
Tune3 573Hp 1018ftlbs 32psi 1650*
Tune4 631hp 1138ftlbs 34psi 1750*
Tune5 650Hp 1305ftlbs 40psi 1730*
So as you can see, with less fuel you have a little less power because it takes more drive with the smaller turbine and larger compressor than the 2.5Stg2 LLy reman turbo but as you add the fuel then the bigger compressor really starts to shine! Tomorrow I will get a 68mm on it. Stay tuned!
Check out the video of Tune 5 and pay attention to the hp read out when the run stops and the dyno pulls the motor back down you can see the power really shoots up because the rpm is coming down and the boost is increasing. This little tid bit is important because it is part of the whole cylinder pressure issue that guys don't get to see or know about. This is what happens on a shift like the 4-5th gear or 5th-6th gr and your "safe" 500hp bends the rods and you can't figure out why. This is part of the reason I dyno my stuff the way I do so that I can see all the important info I need to. If you notice this dyno run was technically almost 40secs at full throttle from start to finish.
https://www.youtube.com/watch?v=shH3hke6fKs
EDIT!
Well, took the control valves apart and got them fixed and re ran this turbo(It is actually the same turbo that I run everyday on my LML) tonight and with the dyno working correctly the numbers are different than before. So Here it is.
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*
BMW65mm Stg2 LBZ Reman
Tune1 473hp 830Ftlbs 25psi 1500*
Tune2 532Hp 960Ftlbs 30psi 1600*
Tune3 573Hp 1018ftlbs 32psi 1650*
Tune4 631hp 1138ftlbs 34psi 1750*
Tune5 650Hp 1305ftlbs 40psi 1730*
So as you can see, with less fuel you have a little less power because it takes more drive with the smaller turbine and larger compressor than the 2.5Stg2 LLy reman turbo but as you add the fuel then the bigger compressor really starts to shine! Tomorrow I will get a 68mm on it. Stay tuned!
Check out the video of Tune 5 and pay attention to the hp read out when the run stops and the dyno pulls the motor back down you can see the power really shoots up because the rpm is coming down and the boost is increasing. This little tid bit is important because it is part of the whole cylinder pressure issue that guys don't get to see or know about. This is what happens on a shift like the 4-5th gear or 5th-6th gr and your "safe" 500hp bends the rods and you can't figure out why. This is part of the reason I dyno my stuff the way I do so that I can see all the important info I need to. If you notice this dyno run was technically almost 40secs at full throttle from start to finish.
https://www.youtube.com/watch?v=shH3hke6fKs
Last edited:
Mark lovesssssssss s400s
I do as long as they are used in the correct manner!:hug:
I have it on good authority that he's going to tune a 68stg2r with 40 overs and a 12mm stroker on November 3rd
Thanks for the testing Mark. These evidence based numbers are more realistic goals for my 65mm.
Ok, well I had a very busy Friday night and Saturday as I did 4turbo swaps and an average of 6 runs per turbo. As of right now I currently have put 55 passes on this motor already which roughly equates to 11 minutes at full power! Ok so back to the data, all 4 turbos that were tested this weekend were LLY based turbine housing with the factory 3794va 10-blade turbine and stock vanes. As said before the tuning remained the same as I wasn't looking for max power just breaking in my new motor and doing a back to back test just for informative comparison. I will recap the previous test results and then add this stuff to it.
Recap Stock LMM Core turbo 61x88mm Comp)
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 (63.5x88mm Comp)
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*
BMW65mm Stg2 LBZ Reman (65x88mm Comp)
Tune1 473hp 830Ftlbs 25psi 1500*
Tune2 532Hp 960Ftlbs 30psi 1600*
Tune3 573Hp 1018ftlbs 32psi 1650*
Tune4 631hp 1138ftlbs 34psi 1750*
Tune5 650Hp 1305ftlbs 40psi 1730*
BMW65mm Stg2 LLy Reman (65x88mm Comp)
Tune1 493hp 850ftlbs 27psi 1450*
Tune2 544hp 961ftlbs 30psi 1500*
Tune3 576hp 1008ftlbs 31psi 1650*
Tune4 640hp 1173ftlbs 36psi 1750*
Tune5 670hp 1316ftlbs 37psi 1700*
Cast Box GT3794Va Stg1 (65x94mm Comp)
Tune1 475hp 838ftlbs 25psi 1495*
Tune2 533hp 938ftlbs 28psi 1600*
Tune3 560hp 993ftlbs 30psi 1700*
Tune4 601hp 1140ftlbs 32psi 1750*
Tune5 632hp 1302ftlbs 37psi 1657*
DP BMW GT3794Va Stg2 (65x94MM Comp)
Tune1 485hp 845ftlbs 26psi 1460*
Tune2 550hp 950ftlbs 29psi 1650*
Tune3 580hp 102ftlbs 31psi 1700*
Tune4 651hp 1184ftlbs 35psi 1750*
Tune5 682hp 1312ftlbs 36psi 1750*
DP B68mm Stg2 (68x94mm Comp)
Tune1 483hp 840ftlbs 26psi 1450*
Tune2 555hp 950ftlbs 30psi 1650*
Tune3 585hp 1010ftlbs 31psi 1700*
Tune4 662hp 1175ftlbs 36psi 1700*
Tune5 726hp 1383ftlbs 44psi 1600*
Unfortunately I am running out of time so I will be bolting my 72mm vgt on it and the triples and dial it in so I can get this beast installed in the truck at the end of this week so I can make my 1/2 mile race in two weeks. I got a mile record to try and beat in half the distance! I went 159.8mph last year as I drove it everyday but my goal this year is 175mph. The current mile record is 172mph held by the Dmaxtuner truck a couple of years ago in Texas. I'll keep you guys posted and I will let you know what it does this week with the triples!:thumb:
Recap Stock LMM Core turbo 61x88mm Comp)
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 (63.5x88mm Comp)
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*
BMW65mm Stg2 LBZ Reman (65x88mm Comp)
Tune1 473hp 830Ftlbs 25psi 1500*
Tune2 532Hp 960Ftlbs 30psi 1600*
Tune3 573Hp 1018ftlbs 32psi 1650*
Tune4 631hp 1138ftlbs 34psi 1750*
Tune5 650Hp 1305ftlbs 40psi 1730*
BMW65mm Stg2 LLy Reman (65x88mm Comp)
Tune1 493hp 850ftlbs 27psi 1450*
Tune2 544hp 961ftlbs 30psi 1500*
Tune3 576hp 1008ftlbs 31psi 1650*
Tune4 640hp 1173ftlbs 36psi 1750*
Tune5 670hp 1316ftlbs 37psi 1700*
Cast Box GT3794Va Stg1 (65x94mm Comp)
Tune1 475hp 838ftlbs 25psi 1495*
Tune2 533hp 938ftlbs 28psi 1600*
Tune3 560hp 993ftlbs 30psi 1700*
Tune4 601hp 1140ftlbs 32psi 1750*
Tune5 632hp 1302ftlbs 37psi 1657*
DP BMW GT3794Va Stg2 (65x94MM Comp)
Tune1 485hp 845ftlbs 26psi 1460*
Tune2 550hp 950ftlbs 29psi 1650*
Tune3 580hp 102ftlbs 31psi 1700*
Tune4 651hp 1184ftlbs 35psi 1750*
Tune5 682hp 1312ftlbs 36psi 1750*
DP B68mm Stg2 (68x94mm Comp)
Tune1 483hp 840ftlbs 26psi 1450*
Tune2 555hp 950ftlbs 30psi 1650*
Tune3 585hp 1010ftlbs 31psi 1700*
Tune4 662hp 1175ftlbs 36psi 1700*
Tune5 726hp 1383ftlbs 44psi 1600*
Unfortunately I am running out of time so I will be bolting my 72mm vgt on it and the triples and dial it in so I can get this beast installed in the truck at the end of this week so I can make my 1/2 mile race in two weeks. I got a mile record to try and beat in half the distance! I went 159.8mph last year as I drove it everyday but my goal this year is 175mph. The current mile record is 172mph held by the Dmaxtuner truck a couple of years ago in Texas. I'll keep you guys posted and I will let you know what it does this week with the triples!:thumb:
What's the main difference in the stg2 LLY vs the stg2 3794? Compressor exducer? I'm surprised it's only 12hp on the top end.
I'm guessing you are about the 65mm Stg2LLy versus the BMW3794Stg2? To answer that it is the exducer of the compressor being 4mm bigger on the 3794va. I think on a stock motor with normal sized injectors the differences would be more pronounced but my 15.5:1Comp with big cam and heads and fuel is definitely messing with the numbers some!
They say to get your kids involved in what you do so I did just that, lol! Thought you guys would get a kick out of my boys!
https://www.youtube.com/watch?v=Jwe9TEs2NRQ
https://www.youtube.com/watch?v=SMfbL4OgC00
https://www.youtube.com/watch?v=Jwe9TEs2NRQ
https://www.youtube.com/watch?v=SMfbL4OgC00
