For All You Haters That Say Intakes & Exhausts Don't Make Power - Dyno Proof

If the exhaust was a restriction at 3k RPM stock, you'd see massive gains at peak. Turbo engines don't gain much from exhaust down low because there's just not enough flowing through for it to be the bottleneck - opening up the intake and exhaust is all top-end gains.

I'd want to see results from someone not trying to sell the $1,600 exhaust in question and I can guarantee you won't see those gains.

 

A tuned truck isn't stock.

 

Nooooo! These engines are already on the ragged edge and if you do anything to improve them you’re just building an IED that will cost you your life savings!!!

 

Exactly what it says.

If the K&N air filter lets larger particles in - which it does - those particles enter the combustion chamber through the intake manifold and valves. The oiling system has nothing to do with it, so oil changes don't affect it.

 

Parts wise, it is.
The post was titled "Intakes and Exhaust".
You don't need an intake or exhaust to make the power in the original post.

Do intakes and exhaust help? - Absolutely

But I want to see an intake and exhaust make more power than a "stock parts" tuned truck.

I think their tuner let them down........big time.

 

well that’s just blatant misinformation

oil enters the intake from the pcv valve. Many people run catch cans to prevent this so their valves aren’t shot at 100k+ miles

 

Is any of this going to get a 4G faster than a stock 3.5 Raptor? Call me a skeptic.

 

No, pressure from the crankcase is vented to the intake through the pcv valve. There’s oil vapor in it, but it’s not in the oiling circuit.

None of that has anything to do with the issue, other than demonstrating that you don’t know how an engine works. The intake has a filter because you don’t want to get abrasive particles in there. If you do, it scores the cylinder walls. Changing your oil more frequently won’t fix that, because the combustion chamber isn’t a part of the oiling circuit either.

 

Per post #20 they fudged the baseline numbers to make their exhaust look good. There's no reason for an intake and cat-back exhaust to give more gains at low rpms than high rpms. They aren't changing runner lengths or manifold volume. A mod that flows more air shouldn't give more gains at low airflow than at high airflow conditions. It's false advertising being enabled by wishful thinking.

 

The truck in the video isn't tuned. Unless I missed that...

Particles, such as dust, are small enough to make it past a KN and not scratch the cylinder wall. Those same particles will make it into the oil... So changing the oil will help in those cases.

But not letting them past the air filter in the first place is best.

 

True

Depends on the particle.

Only if they blow-by the rings. More likely they exit through the exhaust.

Nope, because they are captured by the oil filter. If you're clogging your filter or needing to change the oil more often because of these "particles that came in through the intake", you've got bigger problems in the cylinders.

Yep. Using a quality filter is the best way to do this. K&N is for air-flow and reusability. Almost nobody washes or oils them. They're for true performance applications, where engines get rebuilt after so many hours; but folks wanted them because the racers use them. Now there's a market for people who don't know any better.

 

I never said it was part of the circuit, you were talking about the oil system and the PCV is definitely part of the oil system. While cleaner oil wont fix it by design it will reduce and does affect the build up of particles that enter into the intake system. I've seen enough heads at 150k+ miles to tell the difference of someone who changes oil regularly vs someone who lets it go 10k+ between changes.

Cognitive dissonance is a bitch.

 

I know. I told you that earlier.

Your cognitive dissonance has you moving goalposts and talking nonsense.

No, I was talking about the intake and combustion chamber, and that oil had nothing to do with it. You inserted PCV, wrongly, and still get it wrong.

lol

No, it's not. It's an emissions solution. Crankcase pressure used to be externally vented, directly. Then they put breathers on them. Now they use PCV back into the intake.

 

Wait, does anyone actually believe that stock pull is accurate?

 

That's not how physics work. You don't just suddenly hit a restriction a certain flow rate

My point was 70HP is a rediculous figure for a 300HP engine from just exhaust. It's not like they put a 1" down pipe on it

 

I don't think he's saying that.

3k RPM is the data point emphasized in the video. The video's argument is that the freer flowing exhaust created the gain at 3k, implying there was a restriction. velogeek points out that "IF the exhaust was a restriction at 3k..." and why that wouldn't make any sense because there would be a massive gain at peak. You're making the same point in a different way.

 

Just the bros who never got taught how to shape the bill of their hat.

 

Fair enough

 

apparently its just the average of their pulls from their video from like 10 months ago when they got their truck and did 3 or 4 pulls, but it is on the higher end of the other dyno's i've seen

 

The truck never made 70HP more.
And it didn’t make 120 TQ either.

More like 10HP and 40 TQ.

What is did was, create more HP and TQ earlier in the RPM range.
And how they managed to do that with an exhaust and intake? I don’t know.
That is a big shift……

I’m quite sure there are some tuners in here that know?
But I’d also think they aren’t going to talk.
Mostly because in order to talk, you’d have to give away info, and possibly talk about another tuner.

But I’m curious if any of them has seen an exhaust and intake pull the power curve back that far in the rpm.