There is a different between air velocity and air capacity and balancing between the two. Why don't you ask me why people don't get 1" exhaust systems. It's the same theory.

Yes, the supercharger can make a draw for air but to the point of utilizing and even being able to supply the supercharger that same velocity of airflow and a larger capacity with a 70 MM throttle body is not going to happen.

And also once again, you can only compress so much air and you can only draw in so much air when the valves open. Yes, you're creating 18 PSI of pressure in your manifold but how much of that pressurized air is being utilized, that's a different story.

Seriously, why don't you just do it and stop wasting our times. You come on a forum and ask a question, someone gives you a answer and you disagree like you know what you are talking about and you will argue your point left and right...just ******* do it. Who cares what we think cause evidentally you DON'T.

Exactly!

And thank you.

I don't understand this thread at all.

ROFL

 

BINGO!

It's like these people so quick to trash their intake manifold for something "larger" when it's far from being a restriction.

 

You want restriction, perhaps you should be looking at the stock LSJ heads first. TB is a last thing to upgrade. Even a fully ported Stage 3 Ecotec head cannot flow faster then an stock EVO head. The head is pretty restrictive piece IMO, so is the crappy LSJ exhaust manifold design. The rest of the exhaust outflow the header so imagine that restriction..

All that larger TB will do is make the air dance around the inlet. Also, good luck tuning the extra coming in. The momment you put that TB on without it tuned it will throw it in limp mode because it cannot read all the extra air.

 

reformed comment....done with this

 

WTF?

 

I agree and disagree...sort of.

I agree the TB is the last thing that should be changed. I also agree that the head is restrictive BUT I will say it depends on the purpose of the vehicle as far as powerband and RPM band as well. Honda cylinder heads are known for being high in CFM flowing capabilities but they are also revving 8k and sometimes higher.

That means that we win...

WE WIN! WEEEE!

 

I've looked at flow charts before for the ecotec head, it's sub-par compared to the rest of the competiion even with some work done to it, although I do agree it's better then some.

 

responded to a comment then just deleted it.

PSI is built for a reason, restriction occur with PSI. You cant say the engine doesnt have restrictions. The tb was only a question but when idiots come on here and mention HP and not CFM, Pressure and other things it just ticks me off. Cylinder Heads will need a port and polish I know, and I know the MAF from and oversized tb wont read correctly without a tune as well.
Bottlenecks I was talking about were with flowing more air through larger space. Not how much that space can hold via pressure, density, and heat.

 

Si Senior.

 

it can read the air....it just needs a tune

 

I take it your using a TB off a Colorado/Caynon and fabbing it to your supercharger?

 

No one did.

All of our comments were mentioning towards your "70 MM Throttle Body" comment.

OH NOEZ! U LT DA S3KR3TZ OUT!1111111

 

My original post was about any restrictions in general. Then some idiot went on a rant measuring TB with HP rating which is like giving 93 octane an HP rating. Going to bed

 

Are MAF sucks. It's the most pickest sensor on any vehicle i've ever seen. Thats why since it's so sensative we constantly have to make changes to counter or adjust what it cannot compensate. Even throwing an intake on the car makes it wig the hell out.

 

No fabbing required, it bolts and plugs right in. Only need a new coupler for the intake. I put one on my car just to try it, it idled ok and responded fast as hell, but over about 20% throttle opening you got limp mode. Something for me to play with when I get HPT.

 

You know what...you're right.

I apologize, I think I took it as you initially asking about TB changes.

 

so why does raw say it gains 10hp