"The Smoking Tire" - VP100 ProTune

[me32]

The cfm of the turbo does not change.

So what is the max cfm for this exact turbo on the st?

 

[DHM1]

The cfm of the turbo does not change.

Thats what a compressor map is! its a map showing CFM over different dynamics. Things like restrictions and rpm variances because of different things that arise in the exhaust system.

 

[re-rx7]

So what is the max cfm for this exact turbo on the st?

I believe 268cfm or 10% less then a t25 on a 2nd gen dsm. A t25 barely flows enough for. 220 on pump. I think it probally less. Just quick google search on cfm for the kp39.

Edit: 265 for the t25, so the kp39 is less then the t25.

Update: guy is going to the dyno with 101 vp to see what he gets. Will keep everyone posted.

 

[DHM1]

I believe 268cfm or 10% less then a t25 on a 2nd gen dsm. A t25 barely flows enough for. 220 on pump. I think it probally less. Just quick google search on cfm for the kp39.

Please stop spreading miss information! Mass Flow Rate is the mass of air flowing through a compressor over a given period of time and is commonly expressed as lb/min. Mass flow can be physically measured, but in many cases it is sufficient to estimate the mass flow for choosing the proper turbo.
Many people use Volumetric Flow Rate (expressed in cubic feet per minute, CFM or ft3/min)) instead of mass flow rate. Volumetric flow rate can be converted to mass flow by multiplying by the air density. Air density at sea level is 0.076lb/ft3.

That would mean you 268 cfm is 20.36lbs/min! What is my mass flow rate? As a very general rule, turbocharged gasoline engines will generate 9.5-10.5 horsepower (as measured at the flywheel) for each lb/min of airflow. So, an engine with a target peak horsepower of 400 Hp will require 36-44 lb/min of airflow to achieve that target. This is just a rough first approximation to help narrow the turbo selection options. So at the most we can hope for is 213hp crank (178whp with 16% loss).


Russ

 

[re-rx7]

Please stop spreading miss information! Mass Flow Rate is the mass of air flowing through a compressor over a given period of time and is commonly expressed as lb/min. Mass flow can be physically measured, but in many cases it is sufficient to estimate the mass flow for choosing the proper turbo.
Many people use Volumetric Flow Rate (expressed in cubic feet per minute, CFM or ft3/min)) instead of mass flow rate. Volumetric flow rate can be converted to mass flow by multiplying by the air density. Air density at sea level is 0.076lb/ft3.

That would mean you 268 cfm is 20.36lbs/min! What is my mass flow rate? As a very general rule, turbocharged gasoline engines will generate 9.5-10.5 horsepower (as measured at the flywheel) for each lb/min of airflow. So, an engine with a target peak horsepower of 400 Hp will require 36-44 lb/min of airflow to achieve that target. This is just a rough first approximation to help narrow the turbo selection options. So at the most we can hope for is 213hp crank (178whp with 16% loss).


Russ

Have you see the ports in this engine? Oh wait they deleted them. Misinformation? Ha get real. So since you have a firm grasp on this...show me how this turbo will make 250 whp with a restriction like a cat in the exhaust. Show me these magical numbers.

 

[me32]

I believe 268cfm or 10% less then a t25 on a 2nd gen dsm. A t25 barely flows enough for. 220 on pump. I think it probally less. Just quick google search on cfm for the kp39.

Edit: 265 for the t25, so the kp39 is less then the t25.

Update: guy is going to the dyno with 101 vp to see what he gets. Will keep everyone posted.

You haven't provided me with the info i asked. I did not ask for a guess. I did not ask for info on a different turbo. I asked for the exact cfm on the exact turbo on the fiesta st. Nothing more nothing less. If you dont know the info then your argument doesnt make much sense.

 

[DHM1]

Have you see the ports in this engine? Oh wait they deleted them. Misinformation? Ha get real. So since you have a firm grasp on this...show me how this turbo will make 250 whp with a restriction like a cat in the exhaust. Show me these magical numbers.

I have full benchmark data on this engine, every cc, every cfm, have hp and tq point, how fast the turbo was spinning and when, every pressure point, every single data point you could think of. What i do for a living is bench marking and prototyping I have had every ecoboost come though the shop. I know all about the ports i dont need google or pics. But you siad the CFM dont change why does the cat have anything to do with it now? I will show you and everyone else because like i said i dont have any secrets or nothing to hide when it comes to what i do on my own.

 

[re-rx7]

I have full benchmark data on this engine, every cc, every cfm, have hp and tq point, how fast the turbo was spinning and when, every pressure point, every single data point you could think of. What i do for a living is bench marking and prototyping I have had every ecoboost come though the shop. I know all about the ports i dont need google or pics. But you siad the CFM dont change why does the cat have anything to do with it now? I will show you and everyone else because like i said i dont have any secrets or nothing to hide when it comes to what i do on my own.

We need the log from Cobb plain and simple.

 

[DHM1]

We need the log from Cobb plain and simple.

What will the log prove to you that makes you not bad mouth some one that has given us products that you your self uses.

 

[re-rx7]

Says something doesn't it. I use these products and still don't believe the numbers. Better yet I'm gna go buy some v101 and go to Cobb Plano and tell them I want the same numbers.

 

[DHM1]

We need the log from Cobb plain and simple.

when i have before and after dyno you going to call me a liar and ask for my logs? Or just any that just does something you cant understand or do your self. You attract more bees with honey than whats the saying bullets?

 

[DHM1]

Says something doesn't it. I use these products and still don't believe the numbers. Better yet I'm gna go buy some v101 and go to Cobb Plano and tell them I want the same numbers.

shit skip the gas ill load you up on a dyno and give you 600whp. Every dyno can be manipulated ill charge you way less lol.

 

[DHM1]

Says something doesn't it. I use these products and still don't believe the numbers. Better yet I'm gna go buy some v101 and go to Cobb Plano and tell them I want the same numbers.

i figured with your knowledge you tune it yourself and get those numbers.

 

[re-rx7]

i figured with your knowledge you tune it yourself and get those numbers.

Why would I! Lol hell I'd be lucky to get within 15whp like all the other tuners lol

 

[DHM1]

Why does everyone car about these peak numbers there base was "high" the end was "high" but there gains were fair and good! thats the point.

 

[DHM1]

Why would I! Lol hell I'd be lucky to get within 15whp like all the other tuners lol

If you ask nicely and email and wait guys like braden from cobb would be more than happy to help you and email you back with advise.

 

[re-rx7]

If you ask nicely and email and wait guys like braden from cobb would be more than happy to help you and email you back with advise.

I'll need a dyno. So I'll just go to Cobb and ask for the 240 special.

 

[JPGC]

Lol, you guys are still going back and forth with this..

 

[Sourskittle]

That would mean you 268 cfm is 20.36lbs/min! What is my mass flow rate? As a very general rule, turbocharged gasoline engines will generate 9.5-10.5 horsepower (as measured at the flywheel) for each lb/min of airflow. So, an engine with a target peak horsepower of 400 Hp will require 36-44 lb/min of airflow to achieve that target. This is just a rough first approximation to help narrow the turbo selection options. So at the most we can hope for is 213hp crank (178whp with 16% loss).


Russ

I've seen 28.7lbs per min on my car. Does this mean I'm making appox 280hp ? Lol.

Other wise, debate on, sorry for interrupting, lol

 

[COBB Tuning1]

Hey guys, apologies for the delay. I'm out on vacation still but was able to get ahold of our SoCal calibrator and grab a log from the TST tune. The data looks phenomenal as I would expect from the results. There's a lot of misinformation in the thread here, so take the data for what it is. We don't fudge any numbers or skew our dyno settings to make numbers up. The dyno is a tuning tool used to compare calibration changes in a safe environment. Dyno power figures are ONLY comparable on the same dyno, do not try to take these numbers and compare them to any other Mustang or Dynojet as it's not an apples to apples comparison. Jon is a fantastic calibrator that I personally trained here in Austin on the Ford platform in a Fiesta ST of all cars. I have no doubt the car picked up as much power as the dyno said compared to the stock baselines, the data backs that up. Please let us know if you guys have any other questions or concerns, we've got a lot planned for 2015 and can't wait to share it!


Log File Available Here

Cheers,
-Braden @ COBB