Compound boost.

[Jaden]

Originally Posted by Toyarzee

No you haven't...



Let me be an asshole too and assure you that you aren't.

See, my responses don't require 10,000 word essays but accomplish just as much lol. Enjoy keyboard warrior

NO your posts don't say anything (I'm sorry you are incapable of understanding my long winded posts). My 153 IQ and my three degrees graduating summa cum laude proves that you're wrong and honestly I don't give a rat's ass if I come off as arrogant, it doesn't change the reality.

LOL...

Jaden

[CSG Mike]

Originally Posted by Jaden

The point is that it won't be less efficient in the end when done right and it gives you a better torque curve and more earlier in the RPM band.

Absolutely diesel engines are built much stronger, having 100+PSI is not uncommon.

As I've said, It becomes different in the way it has to be planned out and finding FI systems that are efficient at the P/Rs you need them to run at is more difficult. That's what having this discussion was meant to be about.

You can run Turbos in Diesels at there maximum most efficient airflow levels because the purpose is different.

You're trying to get more boost than a single turbo is efficiently capable of providing.

The difference here is that you are trying to get more boost earlier on and at higher flow rates than a single turbo is efficiently capable of providing.

The trick is finding that right combination of high flow at low boost (efficiently) primary FI system and the right quick spooling or quick to get boost rather in the case of pos. disp. s/c, secondary to get the boost levels you need at the rpms you want with the flow the engine can take efficiently.


This was just meant to be a discussion about this and to try to find that right combo. But if people aren't understanding the underlying principles which are the same in both applications, the discussion goes like this one has.

Jaden

With current FI technology, there is no scenario where a compound system is more efficient for a gasoline internal combustion engine. You can't run a compressor/pump at maximum efficiency all day like you can with a diesel.

Case in point: FA20DIT w/ bolt-ons and tune. Turbo will be fully spooled at 1800 RPM under OEM-like testing conditions, and generate approximately 470 crank horsepower, on the stock turbo.

[HunterGreene]

[Jaden]

Originally Posted by CSG Mike

With current FI technology, there is no scenario where a compound system is more efficient for a gasoline internal combustion engine. You can't run a compressor/pump at maximum efficiency all day like you can with a diesel.

That's a reasonable opinion to have. I'm just not going to be so quick to agree with it, and it's my money... So, I'm going to feel free to test that out for myself..

Also, when you have someone with a 2.0 liter making 600hp running 8's in a 3000lb car, it kind of disagrees with you as far as the efficiency in the lower rpm ranges. Sure if he were to pull off the second turbo, he might make 800hp, but then he'd be running high 9's instead of high 8's. Remember, this is ALL based on real world examples, not theory. HE ACTUALLY ran 8's at 600hp in a rwd converted DSM. People running the same primary turbo he was running by itself making 800hp even in AWD never got out of the high 9's low 10's.

I also know that also doesn't matter that much to you since you are a track guy.

Jaden

[CSG Mike]

Originally Posted by Jaden

NO your posts don't say anything (I'm sorry you are incapable of understanding my long winded posts). My 153 IQ and my three degrees graduating summa cum laude proves that you're wrong and honestly I don't give a rat's ass if I come off as arrogant, it doesn't change the reality.

LOL...

Jaden

Can we infer that that mean no degree proves people are stupid?

[CSG Mike]

Originally Posted by Jaden

That's a reasonable opinion to have. I'm just not going to be so quick to agree with it, and it's my money... So, I'm going to feel free to test that out for myself..

Jaden

That is fact, not opinion.

[Jaden]

Originally Posted by CSG Mike

With current FI technology, there is no scenario where a compound system is more efficient for a gasoline internal combustion engine. You can't run a compressor/pump at maximum efficiency all day like you can with a diesel.

Case in point: FA20DIT w/ bolt-ons and tune. Turbo will be fully spooled at 1800 RPM under OEM-like testing conditions, and generate approximately 470 crank horsepower, on the stock turbo.

This is the whole point... The turbo can be fully spooled by 1800 and generate peak hp of 470 and STILL not be as efficient and provide that low rpm torque as a compound boost system.

That's because that turbo doesn't provide the same airflow as a larger turbo at that boost level. When you compound the larger turbo, it's providing MORE airflow at the same boost level, and since the secondary spools that fast, you're providing the same boost early on in the rpm range but with the airflow provided by the larger turbo.

This is why it's imperative to understand the roles of both boost AND turbo airflow in power generation in a low displacement engine.

Jaden

[CSG Mike]

Originally Posted by Jaden

This is the whole point... The turbo can be fully spooled by 1800 and generate peak hp of 470 and STILL not be as efficient and provide that low rpm torque as a compound boost system.

That's because that turbo doesn't provide the same airflow as a larger turbo at that boost level. When you compound the larger turbo, it's providing MORE airflow at the same boost level, and since the secondary spools that fast, you're providing the same boost early on in the rpm range but with the airflow provided by the larger turbo.

Jaden

There's this thing called transient response, that gasoline users like. Diesel users, on the other hand, don't care about that.

[Jaden]

Originally Posted by CSG Mike

Can we infer that that mean no degree proves people are stupid?

I wouldn't presume to say that at all. In fact in most cases it just means you aren't indoctrinated in the paradigms. I'm only defending myself against accusations here. I'm really not an arrogant asshole, I AM highly intelligent though and very learned.

I have to do some work, but I did respond with a day and time for that beer.

Jaden

[KR-S]

Originally Posted by Jaden

I'm really not an arrogant asshole

Originally Posted by Jaden

You probably aren't wrong about me. I am an arrogant asshole in some respects and I'm far more intelligent than the average person... As far as being wrong about compound boost, I've already provided links of people who have shown in the REAL WORLD that what's being said is wrong and what I'm claiming is right. You have to remember, I'M NOT the one who claimed I can show theoretical mumbo jumbo, I'M the one who has shown real world examples. IT was THEM who claimed they can show a theoretical 2liter that makes 200hp N/A making 500hp at 7psi, NOT ME.

Originally Posted by Jaden

NO your posts don't say anything (I'm sorry you are incapable of understanding my long winded posts). My 153 IQ and my three degrees graduating summa cum laude proves that you're wrong and honestly I don't give a rat's ass if I come off as arrogant, it doesn't change the reality.

LOL...

Jaden

Please tell us more about how you know so much more than the people who have experience on this platform, oh wise Jaden.

[DustinS]

I am thinking Cosworth Supercharger with GTX3582R.

[weederr33]

People won't listen to an arrogant asshole no matter the number of degrees. But you don't care.

[weederr33]

Originally Posted by DustinS

I am thinking Cosworth Supercharger with GTX3582R.

I was thinking something like the cosworth kit paired with the avo turbo kit since it's mounted low and out of the way.

[DAEMANO]

What a shitshow.