I would like to learn. Would a mild ported and polished gsr head flow better than a type r head in a gsr? Also why is that? i am looking to go n/a and would like to know which would benifit me more.

 

bump?

 

p&p that head it will better then the itr

 

ITR head is port and polished See link below
All info is from site below

http://www.itrsport.com/

Cylinder head design for the Type R is a double overhead camshaft, four-valves-per-cylinder configuration which incorporates the exclusive VTEC system. The Type R engine utilizes the latest combustion technology to provide a combination of fuel efficiency and power. Because of the low surface-to-volume area of the chamber, minimal surface area is exposed to the heat of combustion and more heat is retained in the expanding gases, resulting in increased thermal efficiency. And the generous "squish" area around the combustion chamber yields increased gas turbulence, faster flame propagation, and even better efficiency.

Extensive modifications of the cylinder head were undertaken improve performance. This also involves hand-polishing of the intake and exhaust ports near the valve seat area. In addition to hand polishing the ports to improve flow, special lightweight intake valves are also fitted. These valves feature a thinner shaft to reduce weight and increase flow. The head of the valve is also lightened to further reduce valvetrain weight. These modifications net a 12 percent weight reduction of the intake valves, allowing the engine to rev higher. These lighter intake valves help extend the rpm range of the Type R engine by an additional 200 rpm.

Special high-performance dual intake valve springs with an oval-shaped cross section are utilized to allow the use of high-performance camshafts for increased flow at high rpm. The unique oval shape allows a stronger valve spring to be fitted in the same area as a conventional spring. Conventional dual high-performance valve springs are used on the exhaust valves. Camshafts fitted to the Integra Type R are longer duration with higher lift to help increase engine breathing and top-end horsepower. At high engine speeds, valve lift on the intake side is increased by 0.9 mm, and on the exhaust side by 1.1 mm, compared to the GS-R. The valve timing is extended an additional 10 degrees on the intake side and 8 degrees on the exhaust side.

Exclusive lightweight valves:
12 percent weight reduction
Valve shaft width was decreased from 5.5mm to 4.6mm
The angle of the valve seat opening was tightened from 60 to 45 degrees
Valve heads are lightened to reduce valvetrain weight
Weight recduction allows engine to rev 200 rpm's higher
Camshafts are longer duration with higher lift:
Increase engine breathing and top-end horsepower
During high engine speeds, valve lift on the intake side is increased by 0.9 mm, and on the exhaust side by 1.1 mm, compared to the GS- R
Valve timing is extended an additional 10 degrees on the intake side and 8 degrees on the exhaust side
Hand-polished Intake and Exhaust Ports:
Intake and Exhaust Ports are hand-polished near the valve seat area to improve air flow
Originally only two of the best mechanics at Honda port and polished the manifolds by hand. At this time only 25 engines a day could be created. During the last several production years 5 mechanics have been working full time on port and polishing in order to increase production.
Special high-performance dual intake valve springs:
Oval-shaped cross section to allow the use of high-performance camshafts for increased flow at high rpm
Non-cylindrical, "flat" springs in order to keep the spring height near-stock, and still increase rebounding power