[iaknown]

NC335d, am I missing something on that last graph? You said that is before and after the turbo install. I'm seeing a large torque increase but only about a 30hp (average) increase. Is this correct? Perhaps I'm misunderstanding something.

[NC335d]

Originally Posted by iaknown

NC335d, am I missing something on that last graph? You said that is before and after the turbo install. I'm seeing a large torque increase but only about a 30hp (average) increase. Is this correct? Perhaps I'm misunderstanding something.

That is correct, it picked up just about 30hp from 2000rpm - 4600rpm. From what I have been told by other diesel tuners besides the guys that did work on my car, its all about torque on a diesel engine and seeing it pick up 120ftlbs is where its at.

[DWR]

Originally Posted by NC335d

I'm not worried about the trans letting go guys, I have another sitting at the shop right now

You say that like you are replacing batteries in cell phone. I am starting to get a good sense of your nerve and wallet. Cool, let the games begin!

[tank567]

Originally Posted by NC335d

That is correct, it picked up just about 30hp from 2000rpm - 4600rpm. From what I have been told by other diesel tuners besides the guys that did work on my car, its all about torque on a diesel engine and seeing it pick up 120ftlbs is where its at.

This is true, I have a few buddies that work @ Rudy's Diesel and they have some trucks that make 400 - 500hp and 1200tq!

Just to show examples check this out: http://www.diesel**********/forum/63-gm-diesel-engines/365-duramax-fifth-generation-2011-lml/387462-what-dyno-results.html



AND THIS IS A V8 TURBO DIESEL PEOPLE(NC335d is making more!). HP DOESNT MATTER ON DIESEL!! Horse power is a by-product of the tq.

[DWR]

Originally Posted by NC335d

That is correct, it picked up just about 30hp from 2000rpm - 4600rpm. From what I have been told by other diesel tuners besides the guys that did work on my car, its all about torque on a diesel engine and seeing it pick up 120ftlbs is where its at.

This is the general consensus. Just have to be comparing apples with apples. Our diesel is relatively high reving without the cubic inches of the truck crowd.
Truth is the transmission is going to control the rpms (indirectly). You need to match the powerband accordingly. For comparison here's curves for an Audi diesel. Note the HP peak rpms. Our engine revs a little higher.

[iaknown]

Originally Posted by NC335d

That is correct, it picked up just about 30hp from 2000rpm - 4600rpm. From what I have been told by other diesel tuners besides the guys that did work on my car, its all about torque on a diesel engine and seeing it pick up 120ftlbs is where its at.

Don't get me wrong, 120ftlbs is an impressive gain, but at 2300rpm on our cars its also useless. I think that's DWR's point as well. After 2nd gear you'll never see it again. Not to mention with a 17" drag radial the car won't be able to put that torque down. I'm not trying to be critical here but am just trying to understand your gains a little better. Did you post a bone stock dyno pull by any chance?

On another note, Bob and I have been chatting a little by email, everybody I've talked to over there so far seems to be easy to work with.

[tank567]

Originally Posted by DWR

This is the general consensus. Just have to be comparing apples with apples. Our diesel is relatively high reving without the cubic inches of the truck crowd.
Truth is the transmission is going to control the rpms (indirectly). You need to match the powerband accordingly. For comparison here's curves for an Audi diesel. Note the HP peak rpms. Our engine revs a little higher.

dude, you posted a dyno sheet that shows KW! come on man, please stop.

I mean, i think only people from Australia use those numbers and the fact you posted the worlds smallest dyno graph of some random car doesnt really help.......

one last thing, i did the math its making peak 215hp @ 4000rpm and a peak of 221LBS of torque at the same RPM!!!!! so the HP ON THE DYNO GRAPH SHOWS THAT THE HP DOESNT PASS THE TQ!!! you proved youself wrong LOL

[Hoooper]

If you want to have a ton of power in first gear, low end torque is great. If you want to go fast you need to have power in the RPM range that you will actually see. Because our engines rev to 4500 RPM, the shift doesnt drop us anywhere near 2300 RPM except from 1-2 (it drops you to 2600 there). Shifting to 3rd drops you to 3000, and shifting to 4th drops you to 3400. You get the point. If you can make the most power between 3000-4500 in our cars you will go faster. Thats a big "if" though. When they start to turn up the boost the power curve might come into that area better

[tank567]

Originally Posted by Hoooper

If you want to have a ton of power in first gear, low end torque is great. If you want to go fast you need to have power in the RPM range that you will actually see. Because our engines rev to 4500 RPM, the shift doesnt drop us anywhere near 2300 RPM except from 1-2 (it drops you to 2600 there). Shifting to 3rd drops you to 3000, and shifting to 4th drops you to 3400. You get the point. If you can make the most power between 3000-4500 in our cars you will go faster. Thats a big "if" though. When they start to turn up the boost the power curve might come into that area better

I will say it one more time, the m57 NEVER IN ITS POWER BAND MAKES MORE HP THAN TQ! YOUR ENGINE RUNS OFF OF TQ! HP IS A BY-PRODUCT OF THE TORQUE THE ENGINE IS MAKING.

HERES ECOTUNES vs STOCK
https://ecotune-scotland.co.uk/produ...-stage-iii-kit
&

Bimmer center VS STOCK
http://bimmerperformancecenter.com/bpc-diesel/

hp never passes tq

Show me different please

[iaknown]

Originally Posted by Hoooper

If you want to have a ton of power in first gear, low end torque is great. If you want to go fast you need to have power in the RPM range that you will actually see. Because our engines rev to 4500 RPM, the shift doesnt drop us anywhere near 2300 RPM except from 1-2 (it drops you to 2600 there). Shifting to 3rd drops you to 3000, and shifting to 4th drops you to 3400. You get the point. If you can make the most power between 3000-4500 in our cars you will go faster. Thats a big "if" though. When they start to turn up the boost the power curve might come into that area better

He obviously doesn't get the point

[Hoooper]

Originally Posted by tank567

I will say it one more time, the m57 NEVER IN ITS POWER BAND MAKES MORE HP THAN TQ! YOUR ENGINE RUNS OFF OF TQ! HP IS A BY-PRODUCT OF THE TORQUE THE ENGINE IS MAKING.

What does that have to do with where you want to make the power? If your engine spins less than 5252 rpm you will never make more HP than TQ, I would hope we all know that, but if you redline at 5251 and make all your power between 1000 and 2000 rpm you arent going to go as fast as if you made the same amount of power between 4251 and 5251.

[TDIwyse]

Originally Posted by tank567

I will say it one more time, the m57 NEVER IN ITS POWER BAND MAKES MORE HP THAN TQ! YOUR ENGINE RUNS OFF OF TQ! HP IS A BY-PRODUCT OF THE TORQUE THE ENGINE IS MAKING.

Hmmm. Would you agree that gearing can multiply torque, but it can't multiply power? Would you agree that if the multiplied torque going to the rubber/road interface exceeds the traction capability of that interface then the extra torque is not beneficial?

[tank567]

Originally Posted by Hoooper

What does that have to do with where you want to make the power? If your engine spins less than 5252 rpm you will never make more HP than TQ, I would hope we all know that, but if you redline at 5251 and make all your power between 1000 and 2000 rpm you arent going to go as fast as if you made the same amount of power between 4251 and 5251.

please read, If one is making more than the other, thats what the engine is producing at that rpm. its that easy to understand..

[Hoooper]

Originally Posted by tank567

please read, If one is making more than the other, thats what the engine is producing at that rpm. its that easy to understand..

It is literally impossible to make more TQ than HP above 5252 RPM, and equally impossible to make more HP than TQ below 5252 RPM.

[tank567]

Originally Posted by Hoooper

It is literally impossible to make more TQ than HP above 5252 RPM, and equally impossible to make more HP than TQ below 5252 RPM.

Sorry hoooper, you proved me wrong with your words. Thank you for posting the info I needed.

[DWR]

Originally Posted by tank567

dude, you posted a dyno sheet that shows KW! come on man, please stop.

I mean, i think only people from Australia use those numbers and the fact you posted the worlds smallest dyno graph of some random car doesnt really help.......

one last thing, i did the math its making peak 215hp @ 4000rpm and a peak of 221LBS of torque at the same RPM!!!!! so the HP ON THE DYNO GRAPH SHOWS THAT THE HP DOESNT PASS THE TQ!!! you proved youself wrong LOL

Sorry if this is hard to understand. You do understand that torque is a static measurement and doesn't move anything, right? The second you move it is horsepower. It isn't an easy concept to grasp at first, so I'm not putting you down for not understanding. It is not like you have torque and then horsepower takes over. But again, that is what you hear in certain circles.

Audi has proven itself has a leader in high performance diesels. I can assure you it is not random. My choice in using that example is to show where the horsepower peak should be relative to peak rpms.

BTW, please use this formula the next time. HP = Torque * RPM / 5252.
That way you can get the right answer. 221*4000/5252 = 168.

[Chief Orman]

Originally Posted by DWR

Sorry if this is hard to understand. You do understand that torque is a static measurement and doesn't move anything, right? The second you move it is horsepower. It isn't an easy concept to grasp at first, so I'm not putting you down for not understanding. It is not like you have torque and then horsepower takes over. But again, that is what you hear in certain circles.

Audi has proven itself has a leader in high performance diesels. I can assure you it is not random. My choice in using that example is to show where the horsepower peak should be relative to peak rpms.

BTW, please use this formula the next time. HP = Torque * RPM / 5252.
That way you can get the right answer. 221*4000/5252 = 168.

Thank you for hanging in, not losing your temper, conveying knowledge and not using caps lock.

[Puerto Rican 335d]

Peyton Place anyone? LOL

[ice rckt]

Originally Posted by Chief Orman

Thank you for hanging in, not losing your temper, conveying knowledge and not using caps lock.

^ This

Subscribed to this thread! Development on this scale is most beneficial to our community; cheers NC335d!!

ps. pretty much the rest of the world uses KW instead of hp. Alas, North America is not the centre of the universe...

[iaknown]

I think several will find this of interest. This is a stock 335D on BPC's dyno from a few days ago (courtesy of NC335d's tuner). So this is the baseline to measure the gains from. Now I feel a bit better for NC335d

[NC335d]

Originally Posted by iaknown

I think several will find this of interest. This is a stock 335D on BPC's dyno from a few days ago (courtesy of NC335d's tuner). So this is the baseline to measure the gains from. Now I feel a bit better for NC335d

Thank you Sir!!

[DWR]

Originally Posted by iaknown

I think several will find this of interest. This is a stock 335D on BPC's dyno from a few days ago (courtesy of NC335d's tuner). So this is the baseline to measure the gains from. Now I feel a bit better for NC335d

Thanks for working this in the background. I don't think everyone knows the work you do behind the scenes that keeps things moving forward.

Now, I too can look at NC335d's results with confidence. Nice.