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Ardun Info

 
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Posted: Wed Jun 23, 2021 7:22 pm    Post subject: Ardun Info

ok, i was just reading the rodders journal, #25, the article on the new Ardun heads that are being manufactured in Britain somewhere by Furgusens.
I have read somewhere b4, that there was somewhat of a design flaw in the rocker arm ratio, that it wasnt that good from the outset.
Well the new ones have been "Improved" they say:

"Furgusen reworked the intake rocker, ultimately achieving a 1.375 rocker ratio, while at the same time converting to roller action."

So, firstly does anyone know what the original rocker arm ratio was?
Does anyone have the rod and custom "Ardun White Papers" that had heaps of info?
Also, they say the new heads are interchangeable with parts from the old heads, so if this is true, why didnt they fix the rocker ratio years ago?
I remember my Holden V8 had crane roller rockers, they were like 1.7:1 ratio, If you design the cam lift to suit, does the rocker ratio really matter that much? you can still get the same lift with a smaller ratio, and a bigger cam profile can you not?

Also, Im not sure how good they actually are (as i have never had any! or even a flathead...), maybe they are regarded highly because of their rarity. However, i was also wondering what the "Hot" stuff was back in the 50s/60s in Australia, was there a product that was as highly regarded over here? A manifold or something that everyone wanted?
Interested to hear what was the good gear back when you were toolin round in your teens.
Im only 28 (only!) so i was into commodores and stuff 10 years ago, so i have no idea.
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Mr34
Rookie


Joined: 11 Jun 2021
Posts: 95
Location: QLD

Posted: Wed Jun 23, 2021 7:23 pm    Post subject:

^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

That was posted by me by the way, dunno why it came up as guest.... life is a mystery...
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devilrod
200rpm



Joined: 11 Jun 2021
Posts: 207
Location: Cranbourne North

Posted: Thu Jun 24, 2021 1:01 pm    Post subject: Re: Ardun Info

Anonymous wrote:
Also, they say the new heads are interchangeable with parts from the old heads, so if this is true, why didnt they fix the rocker ratio years ago?


I'm guessing when they say interchangeable with parts from the old heads they mean Head gaskets?! A flathead head is nothing more than a water passage and spark plug holder, oh yeah and helps with compression. Guess I better read the article again. Then I might try and answer your question.

I guess the Ardun heads were held in high regard for the horsepower increase. Around 75% from memory. Ooooh I would love a set of those, although I think I might have some clearance problems
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JIMBOB
Cruisin



Joined: 11 May 2021
Posts: 336
Location: Canberra

Posted: Thu Jun 24, 2021 1:37 pm    Post subject: Ardun info

Had a look on the wab at the site as advertised in one of the recent Hop Up mags. Did you see the price on those suckers! around the $20k for the kit! Is this right? will have to double check.

Cheers and beers
Jimbob
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Mr Model A
Just Idling



Joined: 25 Apr 2021
Posts: 152
Location: Boronia, Vic.

Posted: Thu Jun 24, 2021 4:46 pm    Post subject:

A true story
In January 2000, I went to visit an old friend who was into cars, but isn't now.
I hadn't seen him in some time, we talked about all sorts of things including cars, when he said he had some rare flathead speed equipment.
Well you can guess what it was, seems his father-in-law raced flathead V8 speed boats back in the 50's & 60's and imported the complete Ardun set up for his boat engine, but, NEVER used them.
To say I was shocked at what sat before me is an understatement, and no, they are not for sale, his F.I.L. who is now 91 wants to still use them
I told this story on the HAMB sometime ago & was shitcanned because I couldn't supply pics.
The old boy knows cars & flatheads, so he knows what he has & is very savvy.
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devilrod
200rpm



Joined: 11 Jun 2021
Posts: 207
Location: Cranbourne North

Posted: Thu Jun 24, 2021 5:06 pm    Post subject: Re: Ardun info

JIMBOB wrote:
Had a look on the wab at the site as advertised in one of the recent Hop Up mags. Did you see the price on those suckers! around the $20k for the kit! Is this right? will have to double check.




Yeah this sounds about right. I think when I first looked they were $13000 us.
Still want a set though
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