port polish question

[ciVTEC94]

can a mild port polsh be performed on an engine's exahust ports, with the header removed only, or does the entire engine need to be taken out and disassembled, my only real concern is that metal shaving backing up into the exhaust valves and doing some damage...thanks

[ciVTEC94]

oh , by the way, im performing this per the instructions on clubcivicquebec.com, on my 94 EX

[E Honda]

Originally Posted by ciVTEC94

oh , by the way, im performing this per the instructions on clubcivicquebec.com, on my 94 EX

Remove the head.......Not worth the risk.....

[stangslayer]

As long as you you only work on one port at a time and make sure that the exhaust valve is closed on that cylinder so nothing falls onto the piston. Having compressed air available to blow out all the dust would be helpful.

How much power are you expecting to pick up from polishing the port as is shown on the site you posted? If you plan on using a die grinder to enlarge the port, you should really pull the head off so a proper job can be done.

[ciVTEC94]

ok thanks, yea i was wondwering myself how much flow oculd possibly be gained from some sandpaper at the very edge of the port as in that site, wasnt sure though, never even witnessed a porting job done

[BullShifter]

Not very much power
Do not try to port/polish your head for the first time. There's no going back, a job better off left to the pro's or going with some thing like a gude head package.
http://www.sa-motorsports.com/diyport.htm

[ciVTEC94]

thanks a lot, guys, saved me some effort for now, maybe ill give the more realistic guide a shot