this is in regards to the factory polish itr heads have. do they only have it polished just behind the valve seat? or is it suppose to run the entire port? thanks for any info. (scroll down for the answer.. thanks guys appreciate the help)


brand new 2001 c5 head, is this all the polish new heads get? (near valve openings)



or maybe new heads dont get the special specific attention.










Modified by cxSHOE at 6:49 PM 11/15/2008

 

Oh wow. That don't look right at all.

 

looks like they forgot the hand porting

 

Having a little roughness produces better fuel atomization. Not sure if this is too much or not though. Post this in the All Motor forum, and be more descriptive about the problem in the title.

 

NOT the way it "should" look. Regardless of on the car from the factory, or a BNIB dealership replacement. All ITR heads are ported/polished. That looks like fresh casting marks.

Do you have the part number you ordered? I wonder if they sent you a B16 head? PR3-x

 

ITR heads only get slight hand work done to the area right behind the valve seat, which this head clearly has. The only thing in question is casting quality.

 

2001 itr head 10003-p73-305 honda sticker still on box recieved, bought from matt at icb (i pmed matt to check his stock) blue and yellow valve springs as well, along with proper CTR cam.

weird???

 

I dunno man. I'd do as you said via PM and have him check the rest of his stock. Should NOT be the casting marks like the picture above.

 

That's what caught my eye as well.

 

correct this is what i have, i thought the "polish from factory" went through the entire intake/exhaust ports?

if this is how the itr head ports are suppose to look like as far as the polish then everything is fine. i knew it was a mild polish i just thought it was much more than just behind the valve seat?

 

I see casting marks, and I've never seen those on the many of ITR heads I had in my hands. Both off of ITR's that rolled from the showrooms, and BNIB dealership replacements.

 

AFAIK, there was never any "porting" done to ITR cylinder heads. The original 96-98 ITR cylinder heads recieved hand performed machining to the valveseat and throat area of the port, and after '98 the process was performed by CNC, as shown in the picture the OP has shown. The machining never went past the valve guide on any B-series 'R' cylinder head (see picture below).

 

ahhh. ok great info. thank you very much. info i never knew.

 

my head is ported/polished all the way on the exhaust side, I have not had the intake mani off to tell you about the that one.

 

Heads aren't polished at all, its a bowl port.

Brand new ITR head. Pic is crap, but you can see the bowl port by the change in color.

 

yea the casting marks are very odd, it runs straight across the entire head, (you can see how it runs on the outside aswell), in both the intake and exhaust ports...

 

That is normal. Here is a pic of the head that came stock on my 2000 ITR.



Carry on.

 

that looks normal for every itr head that ive seen

its just a blend and a good valvejob from the factory, its all in the little details

 

yep, my R head looked the same as above.

 

maybe mine was ported before I got it or are jdm itrs ported more then usdm?

 

No.

 

Only the VTEC solenoids on the 2.0L.

 

cute