Head Overporting
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Head Overporting
Is it possible to have a head ported "too much" for a given cam?
Say you had a head specially ported for JUN III cams, then you used that same head later on with Toda A or Spoon cams.
Would the lesser cams lose more power than they normally would (meaning loss of power from the porting, not the fact that the cams themselves are less aggressive)?
Road Race application.
Say you had a head specially ported for JUN III cams, then you used that same head later on with Toda A or Spoon cams.
Would the lesser cams lose more power than they normally would (meaning loss of power from the porting, not the fact that the cams themselves are less aggressive)?
Road Race application.
All Motor Mentor
Joined: Aug 2004
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From: 902, Nova Scotia, Canada
Re: Head Overporting (Footwork)
It is totally possible to over port a head and lose power. If you ported a head for an aggressive cam and switched back to a mild cam I could see it affecting power for sure. How much depends on how heavily the head was ported.
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From: VA Beach, VA, USA
Re: Head Overporting (EKhatch)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by EKhatch »</TD></TR><TR><TD CLASS="quote">You can port a head to match a cam as far as trying to make power in a given rpm range. </TD></TR></TABLE>
Very True, I am having a head ported now so it will flow perfectly for my other motor which will be using Crower 405's.
Very True, I am having a head ported now so it will flow perfectly for my other motor which will be using Crower 405's.
Joined: Jan 2005
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From: paramount, ca, usa
Re: Head Overporting (hybrid_vtec)
yes you can port to big, I did this a long time ago when I was first taught to port. on an early b16 the car was laggy but when the vtec kicked in it really kicked ***. every one thaught the car was on NOS. other than when the big cam was on the car sucked and got poor milleage. be careful porting or take it to an experienced engine builder and let him know all the mods that the car will be running. good luck
Junior Member
Joined: Jan 2005
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From: halifax, N.S, canada
the biggest problem ive seen with head porting is fuel puddling some people leave the intake side smooth as a babys *** and your head is fucked i had a guy port a head for a b18c5 and when i picked it up i basically had to throw it in the garbage
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Honda-Tech Member
Joined: Jul 2004
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From: VA Beach, VA, USA
Re: (LG_R32)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by LG_R32 »</TD></TR><TR><TD CLASS="quote">the biggest problem ive seen with head porting is fuel puddling some people leave the intake side smooth as a babys *** and your head is fucked i had a guy port a head for a b18c5 and when i picked it up i basically had to throw it in the garbage</TD></TR></TABLE>
The intake ports need to be rough, but the exhaust ports can be smooth though, right?
The intake ports need to be rough, but the exhaust ports can be smooth though, right?
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Re: Head Overporting (Footwork)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Footwork »</TD></TR><TR><TD CLASS="quote">Is it possible to have a head ported "too much" for a given cam?</TD></TR></TABLE>
yes, it is... head flow vs. displacement sets the power band of the motor, so you want a camshaft that'll match that... see if this thread makes sense: https://honda-tech.com/zerothread?id=698160
yes, it is... head flow vs. displacement sets the power band of the motor, so you want a camshaft that'll match that... see if this thread makes sense: https://honda-tech.com/zerothread?id=698160
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