So last week I baught a blox 72mm throttle body. After getting it I saw that my skunk 2 intake manifold was not nearly large enough. So $300 later in machine work I get my manifold back all smooth and big. And after installing everything back onto my car I realize my AEM intake is very very small. So small in fact that I can even fit the rubber part onto the throttle body. Now My question is. Does anyone know of a 72mm intake? Or I am I better off getting on custom made? I am not looking for anything fancy. Just a short ram metal intake.

-Mark-

 

You want a silicone reducer coupler, and a few t-bolt or screw clamps. You can find with at VSRACING.NET or at any hardware store

72MM is a little less than 3 inches, so it'd be optimal to have like a 3 inch to 2.5 reducer or something of that sort, I don't know the size of the intake piping.

<-- Silicone reducer coupler.

<-- T-Bolt clamp example.

 

That was my first thought. BUT I also thought what is the point of having a 72mm throttle body if my intake isnt even that big. Or will that not make a difference?

 

That is a big TB for your car -- I don't know why you purchased such a large one?

 

How do you know what car I have? and two the bigger the better. Plus if I go bigger now I wont need to buy it again. It cant hurt to have to big of a throttle body. (not including gas mileage).

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Poppins324 &raquo;</TD></TR><TR><TD CLASS="quote">How do you know what car I have? and two the bigger the better. Plus if I go bigger now I wont need to buy it again. It cant hurt to have to big of a throttle body. (not including gas mileage). </TD></TR></TABLE>


WRONG! to big is a bad thing. your gonna have no tq. unless you got a bilt na motor your stock one will be good enough.

 

Logic behind this? Please I am instrested.

 

try sucking air through a garden hose, now go suck air through a giant piece of pvc pipe.

its fairly simple.

why not throw on an exhaust with 4inch piping, bigger the better right? ugh.

 

Your point? I am talking about intake not exhaust (and its famed back pressure debat). An engine sucks in air. Can an engine suck in to much air? No it cant, cause if it could we wouldnt have turbos and tons of people would cry at night. Yes it is true my engine sucking ability hasnt increased. But all I did was give it the room to use its maximum sucking power. And please from now on if you say something isnt good just explain why you "think" it isnt good.

 

my point?
my f'n point is you asked why it could be a bad thing and i told your ungrateful ***.

you're welcome is what you were looking for, but obviously you got confused while typing.

and i gave the exhaust as an example, since you stated "bigger is always better" did you not?

and none of this is an issue if you have a built motor that requires more air, which you could've simply said from the beginning when it was initially questioned. a 72mm throttle body on a ported manifold with a 3inch intake is simply too much air for a stock motor, if you can not see that then its your loss.

 

instrument chill out...

he ment the bigger the better for tb's and while he might or might not utilize a 72 mm tb to its full potential, it really is going to hurt him really...

as for being an ungrateful *** for not understanding your response very well, then I guess that I am one too.

 

Poor mans solution: put a coupler in a bowl of water microwave it 20 sec or until mushy (LMAO) and take it out cram it on your throttle body put you intake piping on the other end LET it cool before you clamp it! and it will form to your TB and intake pipe

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by instrument &raquo;</TD></TR><TR><TD CLASS="quote">my point?
my f'n point is you asked why it could be a bad thing and i told your ungrateful ***.
you're welcome is what you were looking for, but obviously you got confused while typing. and i gave the exhaust as an example, since you stated "bigger is always better" did you not? and none of this is an issue if you have a built motor that requires more air, which you could've simply said from the beginning when it was initially questioned. a 72mm throttle body on a ported manifold with a 3inch intake is simply too much air for a stock motor, if you can not see that then its your loss.
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BRAVO!!! and well said!! yes that TB is waay to big for a stock engine, you wouldve been better off with an ITR TB..

 

i believe "volumetric efficiency" is the term you guys are looking for.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by spock_rocker &raquo;</TD></TR><TR><TD CLASS="quote">

BRAVO!!! and well said!! yes that TB is waay to big for a stock engine, you wouldve been better off with an ITR TB.. </TD></TR></TABLE>
+1. and why u need 72mm TB at the first place?

 

c'mon guys, why the arguing. let just debate this instead.. calmly.

when you think about it, yes it makes sense to let the engine get as much air as possible. less resistance with a bigger pipe... however, physics and years of R&D would beg to differ.

http://www.theoldone.com/articles/ check out some of the info here. he does a better job discribing the theories and priciples than i do.

the jist though, is that to a point reducing resistance to flow helps, but as you continue increasing the size you loose velocity. let's take the straw example from further up, but turn that around... blow through a drinking straw into your hand. then, with the same effort, blow through some 1" pipe. which feels like it has the most velocity pushing on your hand?

remember, the engine is running through cycles, not continuously like a jet engine.

but, before your witty rebutle, check out some of those articles, and do some searching around. the info is not hard to find. then tell me why my logic is radically flawed.

 

Thanks for the input guys. This is all I asked for when questioning someone saying it was to big. for facts. Not just because its to big. I understand the velocity and flow theory that is touched on above. And I have heard that many times in regards to exhaust and why bigger is not always better in that area. But with all i have read regarding intakes I have not found anything that I feel says i will make less or wont help at all. So the only thing I can do is try it and let everyone know what I think. If it helped or not. Thanks for the input and for those people that answered the origanal questions thank you for staying on topic.

-Mark-

 

i appreciate your thought process.. i'm always a big fan of testing theories rather than relying on them because someone told you to. let us know what you think as soon as you think anything..