More Boost,Bigger Turbo=Same Power *Solved*
08-14-2007, 07:24 AM
#1
1.0 BAR
Thread Starter
Join Date: Mar 2007
Posts: 247
More Boost,Bigger Turbo=Same Power *Solved*
Never Heard of anyone with the same Situation hence im saying a World First...
Same Power at Different Boost Levels with Different Turbo's
Hi There guys my question is, why does my car make the same Power and torque with Different Boost Levels with Different Turbo's. Where do you start looking? the managment is working 100% the air feul ration is perfect.
Background: 1 year ago i put the Car on Dyno Std Computer. Made 142kw and 275nm boosting 1.2. i was happy as previouslt the car @.7 made 100kw 200nm. But the Tuner told me my smt6 is wired up wrong its does have power and there are x2 negatives on the extra Injectors. i must get it hooked up properly and try again.
So he hooks it up. and set's the car up a little rich for my liking... to i put it on dyno. i start @ 1.7 bar car makes same Power so i turb it down to 1.3 bar co surely it will make more power than it did at 1.2 bar. NOPE. it made teh same power at 1.7 & 1.3 than it did at 1.2 bar. So turbo must be to small...
all the Above was done on a T2.5
Then i go buy a T2.8 and take it to Cape Towns Most trusted Tuner .@ 1 bar it makes 130kw and 275nm so i told him go 1.2 bar on pump feul. car makes 144kw 286nm.
So what can we determine from this? Same KW & Nm with different boost and turbo.
The Regional Megasquirt pro told me my airflow metter is running at Max Voltage Hence unable to make more power. Most people are quick to assume the turbo is to small, this car came out with a T1.5 and guys with the same Turbo's(Mitsi T2.
are running 200kw+ or people think the feuling is Wrong.
Now, Will fitting a Full managemnet system solve my problem's? what will happen to my Curves?
When running a MAF/Piggy back does this kinda stuff happen?
Same Power at Different Boost Levels with Different Turbo's
Hi There guys my question is, why does my car make the same Power and torque with Different Boost Levels with Different Turbo's. Where do you start looking? the managment is working 100% the air feul ration is perfect.
Background: 1 year ago i put the Car on Dyno Std Computer. Made 142kw and 275nm boosting 1.2. i was happy as previouslt the car @.7 made 100kw 200nm. But the Tuner told me my smt6 is wired up wrong its does have power and there are x2 negatives on the extra Injectors. i must get it hooked up properly and try again.
So he hooks it up. and set's the car up a little rich for my liking... to i put it on dyno. i start @ 1.7 bar car makes same Power so i turb it down to 1.3 bar co surely it will make more power than it did at 1.2 bar. NOPE. it made teh same power at 1.7 & 1.3 than it did at 1.2 bar. So turbo must be to small...
all the Above was done on a T2.5
Then i go buy a T2.8 and take it to Cape Towns Most trusted Tuner .@ 1 bar it makes 130kw and 275nm so i told him go 1.2 bar on pump feul. car makes 144kw 286nm.
So what can we determine from this? Same KW & Nm with different boost and turbo.
The Regional Megasquirt pro told me my airflow metter is running at Max Voltage Hence unable to make more power. Most people are quick to assume the turbo is to small, this car came out with a T1.5 and guys with the same Turbo's(Mitsi T2.
are running 200kw+ or people think the feuling is Wrong.Now, Will fitting a Full managemnet system solve my problem's? what will happen to my Curves?
When running a MAF/Piggy back does this kinda stuff happen?
08-15-2007, 01:27 PM
#4
0.0 BAR
Join Date: Jun 2007
Posts: 0
Re: A World First: More Boost,Bigger Turbo....
what turbo's are you refering to? did you map them to even see where your plotting at in the islands on the map?
you may not even be close to spooling that turbo up to its desired range for your engine size.
you may not even be close to spooling that turbo up to its desired range for your engine size.
08-16-2007, 01:15 AM
#7
1.5 BAR
Join Date: Nov 2005
Posts: 828
Re: A World First: More Boost,Bigger Turbo....
more information needed, what engine is this? etc.
what are you using to compensate ignition timing? its odd that your first two maps peak at 4500 rpms and then drop pretty dramatically, like its going into boost and running lean or too rich, or timing could be way off, i don't see how putting on a bigger turbo ( isn't a t2.8 like a t3 super 60?) and make less power with more pressure, also why is it that on the last chart your horsepower starts dropping just as before except not as drastically and yet the torque stays straight across and then jumps up right before redline. hopefully a more experienced person can answer these questions, as i am only familiar with my own setup.
what are you using to compensate ignition timing? its odd that your first two maps peak at 4500 rpms and then drop pretty dramatically, like its going into boost and running lean or too rich, or timing could be way off, i don't see how putting on a bigger turbo ( isn't a t2.8 like a t3 super 60?) and make less power with more pressure, also why is it that on the last chart your horsepower starts dropping just as before except not as drastically and yet the torque stays straight across and then jumps up right before redline. hopefully a more experienced person can answer these questions, as i am only familiar with my own setup.
08-16-2007, 02:39 AM
#8
1.0 BAR
Thread Starter
Join Date: Mar 2007
Posts: 247
Re: A World First: More Boost,Bigger Turbo....
This is my Turbo's Compressor Effecency Map. I know guys who get results up to 2 bars boost with this turbo(Given they are Using much Higher Ocatne Feuls). i read the Comp Map good for atleast 1.5 bar. car is rurrently at 1.2 bar.
it is a 1500cc 12V Sohc Hyundai Scoupe GT Comp is 7.5-1 wit Full Custom Cold Air Intake ,Huge 10 Row FMIC with stainless steel piping , Robbie Ferroli Dumpvalve, WideBody adjustable FPR(Rising Rate),Full 63mm stainless steel exhaust system , 4 Extra injectors on second fuel rail ,Perfect Power SMT-6 Walbro 255 Feul Pump ,70mm Mr Turbo Throttle Body, Aftermarket Tubular Exhaust Manifold,15" Chrome TSW Rims More @ http://www.cardomain.com/ride/2581255
Im trying to make MORE POWER but it seems i have Just hit a Invesable Wall!
The Only thing im Assuming is that the AFM cant Consume More Air/Voltage Ceiling etc. But then why am i the Only Person with this Problem.
Comp Map
it is a 1500cc 12V Sohc Hyundai Scoupe GT Comp is 7.5-1 wit Full Custom Cold Air Intake ,Huge 10 Row FMIC with stainless steel piping , Robbie Ferroli Dumpvalve, WideBody adjustable FPR(Rising Rate),Full 63mm stainless steel exhaust system , 4 Extra injectors on second fuel rail ,Perfect Power SMT-6 Walbro 255 Feul Pump ,70mm Mr Turbo Throttle Body, Aftermarket Tubular Exhaust Manifold,15" Chrome TSW Rims More @ http://www.cardomain.com/ride/2581255
Originally Posted by E-b0la
You made no world first. No two different sized turbos will make identical power.
The Only thing im Assuming is that the AFM cant Consume More Air/Voltage Ceiling etc. But then why am i the Only Person with this Problem.
Comp Map
08-16-2007, 08:35 AM
#9
1.5 BAR
Join Date: Oct 2004
Posts: 877
Re: A World First: More Boost,Bigger Turbo....
144 kw is 193 hp?
looking at the map, the real reasonable limit for this turbo around 15-20 psi is 400 CFM MAX, which is 276 HP. ( 205kw.)
so basically, this turbo alone, eventhough it's close to being maxed out, should not limit your power to 144 kw. Something else must be holding you back.
looking at the map, the real reasonable limit for this turbo around 15-20 psi is 400 CFM MAX, which is 276 HP. ( 205kw.)
so basically, this turbo alone, eventhough it's close to being maxed out, should not limit your power to 144 kw. Something else must be holding you back.
08-16-2007, 10:24 AM
#10
3.0 BAR
Join Date: May 2006
Posts: 1,967
Re: A World First: More Boost,Bigger Turbo....
So what exactly is you management setup? I see the 4 additional injector and the FPR. Are you running a piggy back or something?
I'd bet it something with the tune/management. Have you looked at megasquirt?
I'd bet it something with the tune/management. Have you looked at megasquirt?
