Thinking of using these to replace my inlet valves on my B16a. Do I need to do anything to the CC to seat these valves properly or it is just a straight replacement?

TIA

 

It's a straight replacement.The B16 and Type-R heads are made from the same casting (PR3). You might want to have a three angle valve job done to optimize flow and ensure a good valve to seat seal.And replace the valve guide seals.

 

Thanks dude!

 

MULTI-ANGLE VALVE JOB

A multi angle valve job is the cutting or grinding of 2 or more angles on the seat and valve. The purpose of a multi angle valve job is to improve airflow. By now you have probably heard of 5 angle and radius valve jobs. The truth…… this is more applicable in the American iron heads. There just isn’t enough material in the small diameter seats or valves to see any real noticeable differences on a flow bench. A 1% gain maybe seen on a flowbench but the flowbench has a plus or minus error factor that has to be eliminated before a true flow figure can be attained. American heads can benefit from a five angle or radius valve job not the Honda head. Our flowbench testing has proven that time after time. The correct angle and angle widths is what’s important. More CFM gains have been made through this procedure than applying 5 angles or radiuses.


Just a little bit of information for you since you'll be doing some headwork.

 

cut & paste from joe's site i see Lyonel, if you want more info on cylinder head terms/ port & polishing proceedures go to http://www.alaniztechnologies.com thats where evocelica got that info....

Sione

 

There's no such thing as a straight valve replacement. You need to have the valves seated. You can't just pop them in or you'll have blow-by like no other. The Si comes stock with 3-angle valve seats so you'll have to get that done anyway.

Find a machine shop and tell them what you want to do. They can help you.