i was told to do first 40 grit then 80 for the intake side and leave it at 80 ? is this true? same with exhaust side but then like a 120 to make it a mirror finish...??

 

would like to know also

i port matched my SK2 IM to my head...i think i got carry away with the "bling" and made it super smooth and shinny on the IM lol

 

I personally don't mirror polish anything I do, I use 60-80 on intake and a 120 on the exhaust and combustion chambers. Hope that helps.

 

Yes, intake sid edoes have to remain rough or have some sort of crosshatch to promote turbulence.

The exhaust side can be polished and smooth, but do not make the exhaust port any larger than stock, or you will lose velocity and scavenging.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Revolveu2 &raquo;</TD></TR><TR><TD CLASS="quote">Yes, intake sid edoes have to remain rough or have some sort of crosshatch to promote turbulence.

The exhaust side can be polished and smooth, but do not make the exhaust port any larger than stock, or you will lose velocity and scavenging. </TD></TR></TABLE>What if your running a supercharger? Would you not want as smooth and as large as a surface as possible with the compressed air?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by mrlegoman &raquo;</TD></TR><TR><TD CLASS="quote">What if your running a supercharger? Would you not want as smooth and as large as a surface as possible with the compressed air? </TD></TR></TABLE>

i was thinking about polishing uo the im and s pipe on a JRSC aand inout on that? i would like to know as well thanks!

 

there is no point in mirror finishing the exhaust when after a few miles it gonna be covered in carbon.

 

wouldnt less carbon stick if it was smoother? or because of the extremely high temps it just melts on either way?

 

anybody?
Does anybody have any links to websites or recommendations for books or something?

 

bump again.