abdr500

iTrader: (1)

whats a bear cosworth 2wd head worth its been skimed and is a ported and flowed to its limmit big valve head all done by harvey gibbs the ports are done very good the valve size on the inlet in 38/39 and on the ex is 34/36 please bear in mind its a bear head whats it worth

dave cos4x4

iTrader: (5)

all depends on how much has been skimmed off.

no good buying an expesive head and there is no meat left to skim.

abdr500

iTrader: (1)

right but thats no longer a problem as you can be the right thickness head gasket or shim saver or lowere comprision from piston

Karl

I've watched you at least twice try to sell this head on ebay.............

Now there are some issues to address here,

The valve sizes you quote 39 and 36 are just HUGE and I have never seen a cossie head run such valves. You certainly can't buy valves of this size specifically for a cossie head.

Thus you need to supply a set of valves otherwise it is useless to anyone!!

You also need to give port sizes and of course head thickness.

Double check the valve size too, as its far more normal to run 36.25/32 valves on a big valve cossie. TO confirm valve size measure the outer diameter of the upper edge of the 45 degree cut on the seat.

abdr500

iTrader: (1)

Karl
the valves can be bought from burton power for Ł50 a valve but they are stain less steel item and the valve sizeis correct

allsteel

If it's less than 138.6mm,not very much.Yes,you can use thicker gaskets but by the time the head is built up it would stand someone a lot of cash.If you put up the thickness someone will work out a price.

Martin-Hadland

iTrader: (2)

burton don't list valves this size for a yb!

abdr500

iTrader: (1)

allsteel
i dont know the thickness but lets say its only had 1 skim would this head be worth Ł350 as i paid top money for this about 2 years ago

abdr500

iTrader: (1)

martin-reyland
i know but was told they could get them in

Karl

If they can be bought from Burton then please tell me the part number?

I feel this is going to be a pointless argument, I think I have worked on enough cosworth engines to know what parts are and are'nt available!!


36.25/32 is the normal big valve cossie, bigger is possible but you have to make the valves yourself...................not exactly what joe public is going to want to do if you do have a 39/36 head!

And also head thickness, what is it, its very important?!

pee vee

With those valve sizes, would it be more aimed at a N/A application?
(dont know a lot about it)

abdr500

iTrader: (1)

Karl
thers no argument here i live very local to burton power and walked in to ask about valve for this head was told that they could get them in but at a cost of Ł50 each and would be stainless steel but like you siad it would be a one off valve. thickness of the head i dont know

JonnyBravo

Is this a Nik Waples head ? if so I can maybe find out much more about it.

Tbh judging on what Karl and Martin are saying it seems unlikely to be much good.

abdr500

iTrader: (1)

JonnyBravo
valves can be made at any size you want

Karl

Well the problem here is your talking Ł800 for set of valves from Burton and this will no doubt be a modded valve from another engine ground down to suit. Would you like to risk using such an untested valve in a Cossie turbo engine?

Why did you buy such a head without the valves?

JonnyBravo

I'm assuming because it was cheap !

agree they can be made but my point was that I'd like to ask to see what he built the head for (if it was his work)

Either way someone not afraid of spending some money may purchase it if it has any meat left on it

abdr500

iTrader: (1)

Karl
i wasnt so fussed about valves as i made sure i could get them in steel or titanium in that size that would be up for the job but change of plan

Karl

Well I suggest if you need to sell it you obtain a vernier caliper and give an accurate head thickness.

In addition some pics would help, could you post some up here as I am genuinely interested as I have never seen such a large valve cossie head before?

abdr500

iTrader: (1)

Karl
i will do that tomorow and post it up on here not that i know how to. but if you give me your email address i could send it to ther but will try here thanks for all the reply s to every one

Karl

Hi, that would be good, very interested to see this, my email is:

karl@norrismotorsport.co.uk

foreigneRS

i'd give Ł500 for a bear head. it would look well cool on my wall next to the moose.

abdr500

iTrader: (1)

foreigneRS
ok