Just boutght myself a Xmas present

[Cov_Rob]

What do you guys think of this?
http://cgi.ebay.co.uk/ws/eBayISAPI.dll?ViewItem&item=330384236957&ssPageName=STRK:MEWAX:IT

I've never had a ported and polished head before, so did i get a good deal?

Also i'll be getting fast road cams to fit with it after christmas. Was looking at Catcams. Could anyone tell me the difference between catcams 4901201 and 4901202?

[Stefan-furio]

Looks exxpensive but honestly dont know what it does :D im dont know much about cars hehe

[Cov_Rob]

Was a bit expencive but i've been a good boy this year :D

[swampy]

Who did the work?
Was it done on a flow bench?
Did the bad spelling not put you off?

[Sparco_Tom]

hmmm, get your money back?

[JamesR]

Will compliment some cams well :)

Quite cheap that, Hi-flow would charge about £300 for that work :)

[swampy]

Tis only cheap if the workmanship is good.
Ive had and built some big power engines that have won championships and ive never polishd valves up!

[Cov_Rob]

hmmm, get your money back?

why do you say that? i cant see anything wrong with it myself, butthen again, i don't know much about ported and polished heads

[swampy]

The main thing you need to know is who did it and if its flow benchd?
Or just done by some old boy with a dremel

one will give power and one will loose power

[JonCarter]

if porting a head is basically the same as the casings on a scoot then this work is high class, looks very nice :) will ad a bit of power im sure, maybe nice racing cams to compliment it?

[Boyes]

Ask for invoice of the person who did it, should be a hefty sum £200 upwards for decent head work can cost upwards of £600! In cars now a days it's all about names/companies, but why hasn't he put up who or which company did the work and to what cost, personally if it had £400's of work done i'd put it up as then more people would be willing to pay for it! But it doesn't say which sort of makes you think it could be a home/diy job possibly.

[Saaamon]

Its a big misconseption that "port and polishing" increase power. Often the roughness helps mix the air and fuel mixture. Gas-flowing is not something that you'd do at home so he'll be able to tell you where it was done. But if it has had the work done to it that he says has, it will only be of much use with a set of cams in (PH 3's etc).

[JamesR]

Its a big misconseption that "port and polishing" increase power. Often the roughness helps mix the air and fuel mixture. Gas-flowing is not something that you'd do at home so he'll be able to tell you where it was done. But if it has had the work done to it that he says has, it will only be of much use with a set of cams in (PH 3's etc).

A good port and polish job WILL increase power. FACT.

Although a certain roughness should be maintained as you said :)

[andywiddss1]

why do you say that? i cant see anything wrong with it myself, butthen again, i don't know much about ported and polished heads

i would say the guy ported and polished it him self ,look at the items he has bought and sold ,he bought a full head for 19 quid ;)

http://cgi.ebay.co.uk/ws/eBayISAPI.dll?ViewItem&item=260502052094

[JamesR]

Actually wait!

The description has been taken from hi-flow heads and i can tell some of the things described havn't been done.

The actua ports havnt been polished, its just the outisde of it really. Sorry mate but i wouldnt have high hopes for this afterall :n:

[andywiddss1]

yep a d.i.y job and payed 15 quid for a quick head skim ,good profit there ,u have to luv ebay

[JamesR]

yep a d.i.y job and payed 15 quid for a quick head skim ,good profit there ,u have to luv ebay

lol dremel attack at random parts on the back kitchen work surface on some news paper ftl :homme:

[Quick]

Have you checked that its the correct head for your car? What year is your car.

What year is yours as the ad only says mk2. Is it a 90 or 98bhp head that has been fetled???

[andywiddss1]

Have you checked that its the correct head for your car? What year is your car.

What year is yours as the ad only says mk2. Is it a 90 or 98bhp head that has been fetled???


read the ad says for a silver top vtr :wall:

[Quick]

Silvertops came in both 90 & 98 bhp flavour. (90 pre 2001, 2001 post 98 bhp cat in manifold)

[andywiddss1]

Silvertops came in both 90 & 98 bhp flavour. (90 pre 2001, 2001 post 98 bhp cat in manifold)

they did my bad oops :fcuk:

[Saaamon]

[SIZE="3"]A good port and polish job WILL increase power. FACT.

Although a certain roughness should be maintained as you said :)

Only if done correctly. If the ports are made larger a suitable camshaft will need to be matched to the engine due to the peak VE being changed. Take for example the exhaust port, if excussively ported it can lead to a lack of gas interia which means the engine may only be able to get rid of say 85% of its burnt air and feul mixture, this then dilutes the fresh incoming mix. Its a very seemilar story on the inlet side as well. If the ports are too large then due to again to a lack of gas interia the engine will not be able to achieve 100% VE.

[JamesR]

Thats why i said a GOOD port and polish job :wacko:

[blackie_2k5]

lol could have warned you this is a buy it now shitter, have watched this.. well sen this days ago, only have to read feedback etc to see your a monkey for buying it, not to sound nasty but as usual saxp members are proving stupider and stupider, ive posted quite a few silly threads like this............. ASK BEFORE YOU BUY!!!!!!!!! fucking wake up ppl, its a rip from day 1, all of say maybe 45 max for 165 sale........

[Cov_Rob]

ah well, i think i've done good with it. i'm willing to take criticism for buying it, but at the end of the day, they guys got years of experience doing head work, i asked the relevent questions before buying.
we wont know if i wasted my money or not untill its fitted in the new year with my cams.

which leads me to my second question which hasnt been answered

Could anyone tell me the difference between catcams 4901201 and 4901202?

[johnnyg_vts]

Could anyone tell me the difference between catcams 4901201 and 4901202?

1?





but seriously i haven't a clue.