Thread: HAI vs CAI. CAI wins

Originally Posted by bluegtp91

Way to go everyone, you pissed off the Sheff

Why have I been reading his name as TLShelf up until just now?

My world has just been flipped upside down.

Originally Posted by TLSheff

LOL You'd be surprised how many people do that. I just let it go, unless they do it condescendingly and then its like
Oh Na Beetch!!!
First name is Trevor, somehow some people get Travis out of that... So I just go with T.L.

Fair enough.

Please excuse my attention deficit disorder.

My thought process as follows:

"Wow, this argument is interesting. Ambient air temps, condensed air, etc. Oh wow, good point Mike Kopstain..wait a second..it's not Shelf?"

Oh jeez Mike... that's a deep and dark cave you're wandering into.
A lot of people have it mixed up, and a lot of people simply don't get it.

The m90 is not 100% volumetrically efficient. It gets close under certain circumstances, however in the real world it is a way off from 100%.
Ask yourself this. Is the blower moving the same amount of air at a fixed blower speed on 5psi vs 10psi? If the amount of air is the same, then the inlet flow should be the same, right?

I went through this big time when I was explaining that under certain real world conditions the smaller TVS blower actually flows more air per revolution than the bigger, less efficient m90.

Originally Posted by Mike Kopstain

Oh I get that. I don't have a map in front of me but I can totally believe that a TVS or other similar setup would outflow it down low. The M90 is pretty "loose" and gets more efficient as RPMs go up until a certain point where heat starts to play a part and you go back down. Can we agree on that? :-)

You're confusing two different types of efficiency though. Volumetric Efficiency (VE) is how much air the blower is moving relative to its size. As the blower RPM goes up, the gaps that the air can sneak back out of become less pronounced and the unit becomes more efficient. But that just means that it's moving more air relative to the air it moves at lower RPM per rev. The boost usually increases in upper RPMs though because as the blower's VE goes up, the engine's VE goes down... this makes more boost. And more boost pushes back against the blower and lowers the blower's VE relative to how it would perform had the boost not gone up.

Thermal efficiency is an entirely different subject, but to put it into just a few words... boost = HOT. The m90 makes a LOT of heat, we all knew that, but I don't think many people understand just how much heat it makes, how different weather plays into that, and how different blower RPM and boost levels drastically change the delta temps.

Its all relative...

Although I would like to see the percent of people who have a filter directly on their throttle body compared to having a tube and a filter.

Pretty simply put.....It takes colder air longer to get hot.....Is it going to make a huge difference..No.....Will it make a difference no matter how small that difference is....yes

Cai's Do Effect Hp Results With Porting

Originally Posted by matt5112

Cai's Do Effect Hp Results With Porting

Proves a good point BUT thats also a totally different vehicle. Like someone in that thread said (all cai are different) also that's a v8 rwd we have v6 side way engines. A lot of variables to consider

Like the fact that it makes over twice the power compared to 99% of everyone here makes?

Originally Posted by matt5112

Like the fact that it makes over twice the power compared to 99% of everyone here makes?

Yeah that to lol

Ok, so does the CAI make a big differ in power compared to the WAI, or just a tiny differ?