Minimum Head Thickness?
15-11-2009, 11:58 AM
#1
Minimum Head Thickness?
I'm thinking about buying this head:
http://cgi.ebay.co.uk/ws/eBayISAPI.d...=STRK:MEWAX:IT
But not sure with it being 138.00mm is it going to be any good?
I've got an untouched unskimmed head on the 3 door at the moment which I was going to get done. But now not sure whether to buy this and get the pistons machined to suit the sell my head?
What do you reckon?
Cheers Rich
http://cgi.ebay.co.uk/ws/eBayISAPI.d...=STRK:MEWAX:IT
But not sure with it being 138.00mm is it going to be any good?
I've got an untouched unskimmed head on the 3 door at the moment which I was going to get done. But now not sure whether to buy this and get the pistons machined to suit the sell my head?
What do you reckon?
Cheers Rich
15-11-2009, 04:42 PM
#7
as pointed out in the thread i posted, its the valve seats that get weak. imagine if you'd just built a new new bottom end only for a valve seat to come out and mash one of the pistons & head!
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15-11-2009, 04:50 PM
#8
if you ever want any head work doing, this guy is your man - well thought of on here
http://www.roperdevelopments.co.uk/
Cosworth Sierra YB http://www.roperdevelopments.co.uk/cosworth_yb.htm
Fast Road Fitted with new inlet and exhaust guides £528.75
WRC Specification with new inlet and exhaust guides £575.00
Big Horse Power Competition 500+ bhp, inlets port bored 26.5mm £650.00
if you have a head which is good thickness, i think these prices are extreamly good. Consideing the head in the link posted was £1250.
http://www.roperdevelopments.co.uk/
Cosworth Sierra YB http://www.roperdevelopments.co.uk/cosworth_yb.htm
Fast Road Fitted with new inlet and exhaust guides £528.75
WRC Specification with new inlet and exhaust guides £575.00
Big Horse Power Competition 500+ bhp, inlets port bored 26.5mm £650.00
if you have a head which is good thickness, i think these prices are extreamly good. Consideing the head in the link posted was £1250.
Last edited by LHD220Turbo; 15-11-2009 at 04:55 PM.
15-11-2009, 04:57 PM
#9
does any one know what a 2wd head is at standard??? i all ways hear people blowing on about minimums the head i'm running is 137.9 the valve seats have been sunk and pockets have been matched to 49.9cc i'm runnung 353bhp dark greens t34.48 and its been fine for the last 3 years!
15-11-2009, 04:57 PM
#10
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the guy with the head lives along the road from me, he has had it for ages
as said before i would start with something as close to std thickness as possible
as said before i would start with something as close to std thickness as possible
15-11-2009, 05:04 PM
#11
does any one know what a 2wd head is at standard??? i all ways hear people blowing on about minimums the head i'm running is 137.9 the valve seats have been sunk and pockets have been matched to 49.9cc i'm runnung 353bhp dark greens t34.48 and its been fine for the last 3 years!
like i said earlier mate; lots of people running heads lower than 138mm
Last edited by LHD220Turbo; 15-11-2009 at 05:14 PM.
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