modified cylinder heads

commeracer

Well-Known Member
just putting the feelers out to see if anyone is interested in having their cylinder head ported [?]
for those that do not understand, this means cleaning up and reshaping the inlet/exhaust ports to flow better and reshaping the combustion chambers for better efficiency. the results are better economy,more torque,more bhp and a crisper running engine.
all for a flat cost of £120, about half what you would normally pay :)
any takers [?]

"you were only supposed to blow the bloody SLIDING doors off no.3"
 

commeracer

Well-Known Member
this applies to iron or ali heads, so dont be scared panky :D

"you were only supposed to blow the bloody SLIDING doors off no.3"
 

Panky

Administrator
Staff member
Lets see what your manifold and 1 3/4" SU coupled with the twin downpipes and RC40(s) produces - then the head. Well I want to assess the development in stages:)
Do you know if the valves and inserts on the ally head are hardened? and suitable for unleaded, without additive.

'Harvey the RV'
 

commeracer

Well-Known Member
easiest way to tell if valves/seats are any good is with a magnet.
quality steels tend to be austenitic which is non-magnetic and work hardens. some exhaust valves have a en52 head friction welded to a magnetic stem, which is ok. if its all non-magnetic then its good quality, if its all magnetic its cheap poor quality :) its really only the exhaust side that needs sorting for unleaded.

"you were only supposed to blow the bloody SLIDING doors off no.3"
 

Panky

Administrator
Staff member
I'll use additive just in case :) Until you find out when you mod it ;)

'Harvey the RV'
 

commeracer

Well-Known Member
i have just tried a holbay head and both seats are magnetic [xx(][V] so looks like yes to additive.
i also need to know what exhaust manifold you will be using panky, a pic would be useful, so i can organize clearances :)

"you were only supposed to blow the bloody SLIDING doors off no.3"
 

Panky

Administrator
Staff member
This will be the one, slightly modified (by Mr P Fordy) to clear the PB Engine bay

[/IMG]

'Harvey the RV'
 

commeracer

Well-Known Member
cheers :) thats helpful. i may also need some measurments or some sort of template as well. last thing i want to do is make an inlet that wont fit with the exhaust [:0]

"you were only supposed to blow the bloody SLIDING doors off no.3"
 

Panky

Administrator
Staff member
Have you got a manifold you can modify or would it be possible/simpler to modify my twin Stromberg one. I can always send you mine as an exchange if it is suitable. My email is john_pankhurst8 at yahoo.com if you could give me an idea of £££s :I

'Harvey the RV'
 

commeracer

Well-Known Member
same price as woolfys doors..........£10 000 000 + vat:D

"you were only supposed to blow the bloody SLIDING doors off no.3"
 

Panky

Administrator
Staff member
I'm sure we could come to some arrangement on the VAT - after all it has been reduced ;)

To -10000%

'Harvey the RV'
 

commeracer

Well-Known Member
sure is, my profit margin this year is nearly down to the level of sir Alan Sugars [:0][:0]

"you were only supposed to blow the bloody SLIDING doors off no.3"
 

Panky

Administrator
Staff member
I'm getting a bit excited :p It's things like this that spur me on, this mod may have been done before on a Rootes model, but on a Rapier engine in a PB - and to Tims standard - I don't think so [8D]

'Harvey the RV'
 

Panky

Administrator
Staff member
Kaaalm down - kaaalm down, I've not been this excited since I got my first shellsuit :)

'Harvey the RV'
 

commeracer

Well-Known Member
cheers panky, its a great help....................i needed some hardcore :D;)

"you were only supposed to blow the bloody SLIDING doors off no.3"
 
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