mrviper

i just got me a 30k focus rs bottom end for £300 now i need a head but will a blacktop head be ok?

i have the cams from the same engine so all i need is a rocker cover and a head to make it compleate

all i know it the valves are made different. so maybe get some new valves for a blacktop head?

the chap i got the engine from says a rs head is worth around £400 and sujested that i fit a st170 head and block off the oil pressure for the vairable valve timing and fir the rs cams in that

so what do you think?

DazC

iTrader: (1)

I thought the RS head was a black top...

Turbo Zetec

iTrader: (1)

as far as i know, the RS head is just a blacktop, the ST head is the one to have

mrviper

great thanks !!

sorry about the delay i had to debuild my computer

TimC

iTrader: (1)

from what iv read the frs cams wont fit the st170 head

©hatter Box

the st170 is the better one but its a bitch to change over as its got fft

phil_focus

i think you mean VVT (variable valve timing)

thought i saw someone on here mention getting a kit or something to disable the vvt???

mrviper

i managed to find a head from a 1.8 mondeo for £93 and covers 50k miles

it stll looks like new inside!

it has 1.8/2.0 inside cast in to the head si i'm presuming this will be ok to use on a focus rs lump

so whats it like sorting the shims out?

smitsturbo

any idea who or where to get 1 from or who makes them?

phil_focus

no sorry mate, not a clue

just remember it being mentioned on here is all

steve7786

iTrader: (2)

The cams are thicker as well if i'm not mistaken. If you get a black top head make sure the code on the front starts with AA as the BB codes are 1.8l There is a difference in the combustion area equating to about 5cc i think. Check with Ian Howell to confirm the difference.

mrviper

humm crap my head i just bought for the FRS bottom end ends with bb

i have genuine focus rs cams

XS7G-6090-BB

and 46 K4 TEA next to the thurmostat housing

so do you think im looking for trouble using this head ?

its using aftermarket management so it's just going to be live maped

and if you look where the head bolt goes near the cam sensor it says 2.0/1.8

mrviper

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mrviper

rofl nice to see i get me £20 worth when i genuinly need some advice

steve7786

iTrader: (2)

The head will be fine to use if you are going low compression. It would only cause a problem if you are planning high comp or massive power. I know of a couple of people that have used them at around the 350bhp mark.