intake manifold?

[tintoy]

need help.. my intake manifold is a stock jdm. my friend gave me a stock usdm intake manifold, if i will use the usdm manifold would there be an increase in bhp? /ubbthreads/images/graemlins/confused.gif thank you for any answers and suggestions /ubbthreads/images/graemlins/smile.gif

 

[Brunoboy]

Loss of low end.

 

[tintoy]

why? bcoz it had a short runner than the jdm? is the usdm intake manofold is the same whit the jdm NA manifold?

 

[fuel]

JDM is dual stage 'CYCLONE', ie there are two runners per port and half of the runners have butterflies controlled by a series of vacuum solenoids. Basically one runner per port is shut off below approx 4500rpm to promote turbulence which improves low down and mid-range torque but at high rpm the butterflies open leaving all runners open effectively flowing nearly as much as a JDM N/A or USDM inlet manifold. For high hp/boost applications the JDM Cyclone manifold can be a little restrictive, but for lower power applications it definitely helps improve low rpm performance.

 

[tintoy]

thank you sir for the info. i really appreciate it. i guess i'll just stick to the jdm cyclone manifold. /ubbthreads/images/graemlins/smile.gif. are there any mods that you can suggest on how to increase the high end hp oo a jdm cyclone manifold?

 

[fuel]

larger throttle body perhaps? More boost will fix it for sure /ubbthreads/images/graemlins/wink.gif

 

[tintoy]

thank you again.. i will post another question soon about a external fuel pump, is a boch pump and dont know how much lph it has. hope you can help me again. /ubbthreads/images/graemlins/smile.gif