my head is stamped pr3-3 some people are telling me this is a type r head and some an sir. can anyone clarify this for me

 

What does your block say?

 

if you have the head off, look inside the ports and you should see that the ports are polished near the seat and no where else

 

The digit after the dash in the head stamp is nothing but a random digit between 1 and 4. It has absolutely nothing to do with what the head actually is. I've seen Type R heads with every digit from 1 to 4, and regular B16 heads with every digit from 1 to 4. Also, I've seen P72 heads with every digit from 1 to 4.

Cliff notes: The last digit means nothing and those who aren't aware of that fact shouldn't be making false claims.

 

i got the motor used, the blosk is a b16a2. the head is off though ill check the insides
thanks

 

chances are its just a normal B16 head if it came off a B16A block.

the only way to tell if its a ITR head is to tear it apart and look in the intake ports to see if there has been some "light" porting near the valve seats.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by non-VTEC &raquo;</TD></TR><TR><TD CLASS="quote">
the only way to tell if its a ITR head is to tear it apart and look in the intake ports to see if there has been some "light" porting near the valve seats. </TD></TR></TABLE>


Look at the intake valves Also, dont need to tear anything apart to see the porting.