Intake Veloicty - Tuner-Junction

Moon Ill · #1 (**permalink**) March 5th, 2006, 11:38 PM

Ok, here's the story. My friend with a black 00 Si is considering get a y-tube for his intake piping. I'm having a hard enough time convencing him that cold-air intake design is better for topend and short-ram is better for low-mid (I even used the straw description). NOW I'm having trouble convencing him that if he uses his dual intake desing he's going to decrease velocity into the intake manifold because the turbulance that going to be created due to the intake drawing in air from two different points leading to the same pipe.

Here the desing. One route of the Y is goign to be SRAI the other will be CAI.

Rhythm Kid · #2 (**permalink**) March 6th, 2006, 02:03 AM

thats going to be an unnecessary strain on the intake vacuum of the motor. He's defenitly not going to gain any power doing it

+RandomHero+ · #3 (**permalink**) March 6th, 2006, 02:07 AM

indeed...with that set-up take your big starw theory and make that into a big ass 2 inch PVC pipe and try to suck in air. it wont work.

SRI > CAI

Clone · #4 (**permalink**) March 6th, 2006, 10:19 AM

yup... sounds pretty dumb.

if the straw description didn't work, your friend is a loss and you should just let him do it.

DCxMagus · #5 (**permalink**) March 6th, 2006, 11:03 AM

if you really wanted to tell him that if he gains power then you will pay the cost of the dynoing for both designs and if not he can pay the cost =P

that or let him do it and let him drive a less effencient car so people just won't listen no matter how much fact are against them

+RandomHero+ · #6 (**permalink**) March 6th, 2006, 12:30 PM

Quote:

Originally Posted by Clone

yup... sounds pretty dumb.

if the straw description didn't work, your friend is a loss and you should just let him do it.

indeed...another way to do this is get 2 straws. as big as you can get. but them in a cup of soda. then try to suck the soda to your mouth. its harder to do then with one straw.

but i agree with CLone

Blake · #7 (**permalink**) March 6th, 2006, 12:44 PM

the pro's and con's from a CAI and a SR are going to be negligible anyway. Its not saying that is going to lose the race for you. But yea, y-pipe is dumb.

98CivicEK · #8 (**permalink**) March 6th, 2006, 12:52 PM

IMO short ram in the way to go.

and to thread starter you have it backwards. the CAI is better int he mid range whereas the SRI is better for top end.

SRI: less bends, shorter piping, less air resistance producing a very laminar flow in the pipe, which leads to higher rpm efficiency

CAI: another bend or two, longer piping (at least 2x as long), the bends will cause a stir with a more turbulent flow at higher rpm, where at lower the bends don't have as much of a swirl affect and due to the ideal resistance for the piping causes a "hump" in the hp in the mid range of rpm's.

but the Y tube is just dumb unless its designed perfectly for a very powerful motor and i seriously doubt that

EDIT: but if you were to look at dyno charts of the sri and cai the only difference is in the mid range. the top end power was occasionally higher in the sri.....especially on cars reving over 8K

Moon Ill · #9 (**permalink**) March 6th, 2006, 03:35 PM

Quote:

Originally Posted by 98CivicEK

IMO short ram in the way to go.

and to thread starter you have it backwards. the CAI is better int he mid range whereas the SRI is better for top end.

SRI: less bends, shorter piping, less air resistance producing a very laminar flow in the pipe, which leads to higher rpm efficiency

CAI: another bend or two, longer piping (at least 2x as long), the bends will cause a stir with a more turbulent flow at higher rpm, where at lower the bends don't have as much of a swirl affect and due to the ideal resistance for the piping causes a "hump" in the hp in the mid range of rpm's.

but the Y tube is just dumb unless its designed perfectly for a very powerful motor and i seriously doubt that

EDIT: but if you were to look at dyno charts of the sri and cai the only difference is in the mid range. the top end power was occasionally higher in the sri.....especially on cars reving over 8K

I thought i had it right, that's what I've always read anyway. Thanks for correcting me if your correct.

He has decided to do it. He said when he proves me wrong he'll call me.

Yep

98CivicEK · #10 (**permalink**) March 6th, 2006, 07:59 PM

Quote:

Originally Posted by Moon Ill

I thought i had it right, that's what I've always read anyway. Thanks for correcting me if your correct.

He has decided to do it. He said when he proves me wrong he'll call me.

Yep

i wouldn't sit by the phone.

DCxMagus · #11 (**permalink**) March 6th, 2006, 09:02 PM

how is he going to prove you wrong?

Last time I checked "butt dynos" don't hold up in the court of law =P

Blake · #12 (**permalink**) March 6th, 2006, 09:05 PM

Quote:

Originally Posted by DCxMagus

how is he going to prove you wrong?

Last time I checked "butt dynos" don't hold up in the court of law =P

thats for damn sure.