All Small Six New Australian Irving head for the Ford six..maybe

[gb500]

This is sure to get 'Extasy' out from his NZ lock down.

So Phil Irving was a famous Australian 'motor' engineer. in the 1940's 50's, 60's , 70's

Phil Irving - Wikipedia

en.wikipedia.org

He was born in Australia and in 1930 went as pillion passenger on a Early Vincent 600cc side valve motorbike from Australia to Britain - via canada.
ended up with a job for Velocette and Vincent in England and designed the famous Vincent V twin motorbike
spent WW2 in Britain design stuff for the war effort .
post WW2 he designed more engines and returned to Australia,
in the 60's he designed (well modified ) a version the Buick alloy stock block that Jack Brabham used in Formula 1 to win the new 3 litre formula world championship in 1966 and his team mate , denny Hulme , again in 1967..

so by early 1970's he had a great pedigree.

a local company 'Perfect-tune ' got him to design a 12 port head for the local Holden (GM) six engine (capacity 179, 186, and eventually 202ci) for hot street and racing
Perfectune also launched 'Yella terra ' parts and are still going.

anyways they made about 26 heads in alloy and the 'Irving head venture' folded.

heres Phil Irving in about 1972 in a magazine advert for the yella terra Irving head :



and installed on a holden 6 - almost a mirror image of the ford 6

whats this got to do with Ford sixes i hear you ask.

the Holden engine has the inlets and exhaust on the (USA) drivers side . with siamesed inlet ports ...
the Ford six has the inlet /exhaust on the (USA )passenger side.

But by some co -incidence they share the same bore spacing.

so some clever dudes in Australia in the the early 70's turned the heads around for the correct port orientation and made them fit the ford six - i think for speedway - but only a few - maybe 3 or so were done (remember only 26 odd heads made.)
by 1975 ford Australia had its own 'crossflow' ford six heads with removable inlet/exhaust manifolds - so not much use for an irving head.

 

[gb500]

fast forward 40 years and an Melbourne , Australia based company - HSD (short for Head stud developments) buys the rights/design to the irving head and starts making them in late 2019 (i think) for the Holden six - but with modern knowledge and technology.)
)

Services | Head Stud Developments

www.headstuddevelopment.com.au

so much so, you can buy them on Australian Ebay for $5500 aussie dollars - about $3900 USD
https://www.ebay.com.au/itm/2241334...h9gJ3sn3vwpe-2dQpcZ0JK3ZSknfF-UkaAkOKEALw_wcB





OK now to the point of this mini history of Australian engine design royalty:

HSD are now trialling the Irving head for prospective manufacture for the Ford six . early days but on their face book page these pics and a statement about looking to sell into the USA.
here is development head on a ford 6 block :

https://www.facebook.com/HSDcylinderheads/posts/4589059754458857

a ' thing' is that the port (inlet /exhaust ) sequence is different to the std ford six - so they need to come up with a new cam shaft as well for the kit.


they have a single 4 bbl inlet manifold as well.- so not stuck with triple weber DCOE carbs



so a maybe for the future - when ? who knows

 

[gb500]

from ebay:

note HSD rate their heads cfm at 25" H20 - rather than the industry std of 28" H2O so add 6% to those figures to get equivalent 28" numbers.

hese heads bolt onto your Holden 6 without any modifications, the Irving head kit will come with rocker cover, a manifold of your choice triple weber or 4 barrel and a choice of exhaust flanges for custom extractors or twin cast iron headers. Rocker gear can be arranged and supplied at an extra cost as well as ARP stud and pushrods depending on application.

All heads are fully assembled to your specifications for hydraulic or solid camshaft, with high quality valve springs, chromoly retainers, hardened machined locks, custom HSD stainless valves.

Prices for the Irving head kit are:

$5,500 -Bolt on as cast flowing approx 170cfm @.500" lift on a 25” bench

$6,600 -Fully 6, basic port work flowing approx 190cfm @.500" lift on a 25” bench

$7,700- Start of competition work flowing +210cfm @ .500" lift on a 25” bench

 

[Cool23]

Lockdown has become a dirty word for many of us.

 

[DoctorC]

This is awesome =)

 

[chad]

the "2", "2", "2" is prudy nice.
I dont C the x-flow, tho. U did say X- Flow, no?
To fit ours? now THAT would B awesome ;^ )