Does anyone have any experience of using the porting and polishing kits that you can buy.

Ive got a fiesta si 1.6 that im replacing a burnt valve on at the moment and as ive got the head and exhaust manifold off I tought about PnP'ing the exhaust side of the head first.
As i understand it it should help increase the flow off gasses from the engine during the exhaust cycle.
Is there anything else to consider or am I better off not bothering.

Cheers, Stephen.

 

I found this site that explains what to do for basic port polishing.

http://www.sa-motorsports.com/diyport.shtm

I reckon it doesnt sound too difficult, any one got an opinion...??

Stephen.

 

if they are off, and you fancy a go, why not! you will get more for your time and effort (relatively) out of a NA engine than you will out of a scoob

i have never used the kits that you are talking about so would not like to comment, but the better the kit the easier and better the job will be.

here is all my kit, there is a lot here, but if you bought the large die grinder (the green one on the left) wire it into a sewing machine controller as the picture to give you variable speed, and a small selection of burrs and extensions then you could do a reasonable DIY job at home for £150 in bits. the die grinder comes in useful for other things as well.

http://img.photobucket.com/albums/v3...k/DSC00287.jpg

a big thing is getting comfy and being able to see properly into the ports without craning your neck. it is really easy to make an expensive mistake and wipe out a valve seat.

i made this adjustable bench, and its makes things 10 times easier and comfier. lets you shine a light from the top or bottom through the port and you can really see well. you may not want to go to this length for a one off but you will have to hold the head at different angles and elevations and somehow get a light shining from the opposite end of the port / chamber.

http://img.photobucket.com/albums/v3...k/DSC00289.jpg

all engines are different. some have good port profiles and some not so good so each head needs to be looked at differently. that guides not bad though and for your first bash just go along with it. you will get most gain from doing a good job around the inlet seat & roof/floor radius areas. dont spend ages on the exhaust side as the gains wont be as much

all you are really doing is cleaning and smoothing, as opposed to a full porting job, but you will notice the difference and it wont affect reliability so have a go if you ask me.

 

Excellent.

Thanks mate!!

Im loving the bench btw!!

 

lol.

you could borrow it but ive just seen where you live and i dont think its practical!