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  #25  
Old 05-10-2010, 10:53 AM
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Re: Homemade CAI for 3.7?

Only reason I understand the equations and such is because I just took thermo this last semester
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  #26  
Old 05-10-2010, 11:26 AM
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Re: Homemade CAI for 3.7?

gcl06 the equations are coming along well. pretty interested in the outcome of them! how are you going to figure out the pressure? P=nRT/V ?
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Old 05-10-2010, 01:50 PM
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Re: Homemade CAI for 3.7?

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Originally Posted by GCL06 View Post
So to go from a 3" inlet through a 2" bottleneck you'd be counting on the venturi effect speeding up the air a full 225% to make up for the lost area (∏3²=~28.26in² ∏2²=~12.56in²).
wow i totally missed over this! first off what are you talking about going from a 3" to a 2"?? I am in no way talking about a bottle neck design at all! here is a picture i found that might help describe what I am talking about...there isnt any sort of bottle necking going on that i can see...

link: http://www.autoaccessorystore.com/we...ret-weapon.htm

so you are going from a 3" to 3" so its straight theres no bottle necking involved.

which brings me to another thing: i saw a picture of a ported throttle body with the stock butterfly valve. how does porting the front and back while leaving the stock diameter around where the butterfly closes give you performance? I can see a larger overall diameter duh gives more room for air to flow...but to have that stock diameter be there still isn't that a turbulent stop that abrupt's the air flow?
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Old 05-10-2010, 03:57 PM
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Re: Homemade CAI for 3.7?

^^^^^Yes
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  #29  
Old 05-10-2010, 05:23 PM
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Re: Homemade CAI for 3.7?

^ yes to what? Lol
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Old 05-10-2010, 05:24 PM
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Re: Homemade CAI for 3.7?

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Only reason I understand the equations and such is because I just took thermo this last semester
Thermo FTMFW !!! I just took Thermo 2 this past semester
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Old 05-10-2010, 05:29 PM
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Re: Homemade CAI for 3.7?

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Originally Posted by 08pretaco View Post
^ yes to what? Lol

"but to have that stock diameter be there still isn't that a turbulent stop that abrupt's the air flow? "
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  #32  
Old 05-10-2010, 06:02 PM
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Re: Homemade CAI for 3.7?

Quote:
Originally Posted by 08pretaco View Post
wow i totally missed over this! first off what are you talking about going from a 3" to a 2"?? I am in no way talking about a bottle neck design at all! here is a picture i found that might help describe what I am talking about...there isnt any sort of bottle necking going on that i can see...

link: http://www.autoaccessorystore.com/we...ret-weapon.htm

so you are going from a 3" to 3" so its straight theres no bottle necking involved.

which brings me to another thing: i saw a picture of a ported throttle body with the stock butterfly valve. how does porting the front and back while leaving the stock diameter around where the butterfly closes give you performance? I can see a larger overall diameter duh gives more room for air to flow...but to have that stock diameter be there still isn't that a turbulent stop that abrupt's the air flow?
Well damn! That design makes a LOT more sense! I've got a few ideas to integrate into a couple projects but I'd need a dyno to see how effective they'd be.
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Old 05-10-2010, 06:34 PM
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Re: Homemade CAI for 3.7?

Ya it sucks man I also have to take thermo 2 and 3 (heat transfer).

So if it abrupts the air flow and people still do it...it must do something. Is it proven or is it just a feel good butt dyno thing?

Ya no I don't want to change the diameter of the actualy tubing twice. Run the smaller tube inside of the larger one. Idk if something like that actually works or anything but sounds like a fun project, thinking of doing it to my taco first and see how that works then maybe for the gf's wk.
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  #34  
Old 05-10-2010, 07:30 PM
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Re: Homemade CAI for 3.7?

heat transfer no fun taking it this summer session ... some people claim that they get a better throttle response of course from more air flow but in reality there are no proven gains so i would say butt dyno feeling for now i'm getting one from Ryan and gonna take and really see if it performs
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Old 05-10-2010, 07:54 PM
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Re: Homemade CAI for 3.7?

Cool, really interesting stuff!

Couldn't and easier and cheaper method to following mods, power and mpg be a scangauge rather than always "taking it in"? Scangauges follow your mileage and they have other great features such as iat power and things of that nature...just a thought and its about 150 bucks to buy, idk how much you get charged to take it in
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Old 05-10-2010, 07:54 PM
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Re: Homemade CAI for 3.7?

Quote:
Originally Posted by 08pretaco View Post
So if it abrupts the air flow and people still do it...it must do something. Is it proven or is it just a feel good butt dyno thing?
If you're referring to the Venturi thing then I think there's def an advantage to be had with that design you linked.
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