Is it a MUST to have a B16 vtec head to be port and polished for better reliability in a ls vtec setup?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Mushvroom &raquo;</TD></TR><TR><TD CLASS="quote">Is it a MUST to have a B16 vtec head to be port and polished for better reliability in a ls vtec setup?</TD></TR></TABLE>

No. Never even heard of that. Why would you need to port and polish a head to increase reliability? Thats complete BS.

 

port n polish is not done for reliability. a good port will help increase and make the flow of air into the engine much more efficient.

 

Noob question?/

What does port N polish do to you engin???

Thanks

 

porting widens up the ports so you can get increased airflow, the polishing just makes everything smooth and nice so the air doesnt have to work against anything, just flows in nice.

 

aight, thanx guys

 

Porting and port shaping is to promote efficent passage of air flow from the inlet to the valve. The valve job and bowl work is where your going to get your flow improvement. Porting is useless with out a good valve job and bowl work.

Polishing is a misleading term. A polished intake port wont work as well as a rough finished port. Atomization is lost with a polished port and promoted with a scaled or rough surface. Often times the intake side will be finished with 80 or even 60 grit.

Some people will polish exhaust ports but IMO its kind of unnecessary. You can achieve similar results with a 120 grit surface finish. The only real reason to polish an exhausr port is to try and aleviate some of the carbon build up that accumilates in the ports over time. In all honesty, carbon is going to draw with a polished or semi smooth surface so its kind of pointless. That is, unless you are the type that likes to see some bling to feel your getting adecquite work. Your better off going with a coating on the exhaust ports.