port an polish

5th October 2006, 19:18

i got a quote the other day to get my car poted and polish £250 which i fort was good so iam thinking of geting it done i no this is a dumm thing to say but what do,s porting and polishing do ? as i gather they take thew head of smooth valves etc and polish them up so every thing flows better . also the bloke said it would give me gains from 8-10 bhp is this ture as well and will it fuck my car up doing this to it ? cheers guys nick

5th October 2006, 19:53

you got the right idea from what i know about it mate. it cleans the ports and smooths them up for better gas flow. have a look on hiflow heads website they have some info on there about it. is that 250 with you removing the head and sending it to them. ar are they taking your head off.

5th October 2006, 20:05

not to sure i going to ask again tomoz he said he will need 3-4 days with it

5th October 2006, 20:08

thats a good price mate!

5th October 2006, 20:12

is it a big job to get the head of ?

5th October 2006, 20:14

not really. not at all! you got a haynes manual? all is explained in there

5th October 2006, 20:24

You will need new gasket and head bolts when you put it back on but its pretty easy.

5th October 2006, 21:36

your valves will be made bigger thus creating better air flow. you car will prob run better aswell. forget 8-10 bhp though, no chance

5th October 2006, 21:41

http://www.saxperience.com/forum/showthread.php?t=50131
try that thread mate

5th October 2006, 22:19

you get what you pay for imo so dont expect much. and bad porting can have a negative effect.

5th October 2006, 22:51

Valves wont be changed for £300. The holes to the valves will be smoothed out or make it easier for the gasses to flow.

Bigger valves costs way more.

5th October 2006, 23:10

Quote:

Originally Posted by bullit

your valves will be made bigger thus creating better air flow. you car will prob run better aswell. forget 8-10 bhp though, no chance

not on a £250 port a polish, for £250 i would expect they woud:

* port match the inlet and exhaust ports
* Polish the inlet and exhaust ports

also posibly polish the cylinder tops to stop carbon buildup, putting bigger vlavles in cost alot as the ports have to be board out to fit and valve seat angles recut. personally i would only get the exhasut port polished and ported and the inlet just ported as on a normally asperated vehicle the rough walls inside the inlet port helps the turbulance adn fuel mixture, smoothing it out can have an adverse effect. i got a great pdf file about how to port and polsh yourself

6th October 2006, 16:58

cheers for the advice guys the bloke said he will do the valves (not change them ) valves seats (not change them ) skim the head and iam guessing exsat ports i still think 250 + vat is good

7th October 2006, 09:18

thankyou cough.
it all depends how long its on the flow bench for. some companys do heads stating stage.3,4 or stage 5 heads or even big valve heads. the price just depends how much works been done, ie. how much is taken off as more takes longer. the price might be good aslong as thats what you want.
ask for flow results aswell

9th October 2006, 19:00

cheers mate i will ask bowt that mate nice one rep comeing your way pal

9th October 2006, 19:53

to get most out of it you will need to sling a cam in. maybe do it at the same time to save you money as the head has to come off to change cam. i would save a bit and do it at same time.