Are the those two blocks bottoms ends the same?I was curious because i heard that putting a itr head on a gsr engine is called a "poor mans type r"?Just wondering if it will give the same power or so?Or for the price of a type r head would it just be better too get better cams and intake and internals for the gsr head?Or does the itr flow better?

 

isn't a type r head a b16 head port and polished?

 

mmm i think its a similar flow,but the whole valvetrain is different.It also has a better flowing intake manifold.

 

The block and crank are the same, however the pistons and rods aren't. I suggest you keep the GSR head and get it mildly ported. Also consider upgrades like the Skunk2 manifold and some decent cams/valvetrain. A mildly ported GSR head will easily outflow an ITR head.

 

both the B16 and B18C5 heads flow a lot bettere than the GSR. to make it short, they both have single runners, which give you more "top" end and less "mid-range". but the GSR head, becasue of it's 2 stage, it has better midrange then bother the B16 and ITR, but has less of an topend.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by integraGSR1 &raquo;</TD></TR><TR><TD CLASS="quote">both the B16 and B18C5 heads flow a lot bettere than the GSR. to make it short, they both have single runners, which give you more "top" end and less "mid-range". but the GSR head, becasue of it's 2 stage, it has better midrange then bother the B16 and ITR, but has less of an topend. </TD></TR></TABLE>

I'm sorry, but you are incorrect. The flow rates for the P72 head are almost the same as the PR3 head, and the 2 stage system you refer to is in the intake manifold, not the head. A good manifold (like the Skunk2) will help the engine breath better at high RPM's while not sacrificing any low to mid range power.

 

Well i want too go all motor.Im just wondering if i should swap the heads or modify my stock one.How much would a full itr head swap go for incuding manifold.Or would it be better too buy a skunk2 gsr manifold and just port polish my head and new cams?

 

if you take ur gsr head and have it mildly ported or a b16a head u will have basically a type-r head. the only difference is the the finished work on the R head is better so there is no more ruffness in the head if u want to call it that. the crafts man ship is just better on the R head.. This is from what i have read in " Honda Tuning" magazine...later

 

Hmm so would a good all motor set-up be ctr pistons,p+p gsr head,stage 2 cams and valvetrain from skunk2,also skunk2 manifold...if that much better.Also what exhaust would you go with?JDM 2.5 header,test-pipe,and any known good 2.5 catback?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Kendall &raquo;</TD></TR><TR><TD CLASS="quote">The block and crank are the same </TD></TR></TABLE>

This is incorrect. The ITR crank is counterweighted and heavier than a GSR crank. They do have the same stroke though, but there are differences between the 2. A GSR and ITR block cast are identical, ie. bore, block dimensions, etc. A B16a, B16b (CTR), B18C/5 (JDM ITR, US ITR) and B17a have all the same original castings (All are PR3 heads), but as someone said above the ITR and CTR have different valvetrain and are hand ported.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by AzSi22 &raquo;</TD></TR><TR><TD CLASS="quote">

This is incorrect. The ITR crank is counterweighted and heavier than a GSR crank.</TD></TR></TABLE>

I knew I had forgotten something.