I am fairly new to the message board, but as i look back through the other posted messages i see alot of discussion about Aussie heads. I know that they come from Australia but what are the differences between them and stock heads? Are they better? If so where can i get them and what is the general price range for them. Thanks

 

[updated:LAST EDITED ON 26-Jul-02 AT 05:20 PM (EST)]i see them on ebay a lot - seems like they go for about $300, depending on condition. some of the ones i see are all old & rusty looking ($275), and some have been cleaned up so they look like they were just cast ($350)... does anybody know WHAT you use to clean up parts like that? grease is easy to get off, but i don't know of anything that strips off rust & oil stains like that!

also, can anybody explain the differences (chambers, valves, ports) between aussie 2v and 4v heads, or are they all the same?

 

I think you use bead blasting for that sort of thing... to make them look like new again.

 

[updated:LAST EDITED ON 27-Jul-02 AT 06:01 AM (EST)]thanks!

anybody have a breakdown on the different aussie heads?

 

They have the same closed chambers as the early 4v heads with the smaller ports as the 2v so you get better tourque. They also have the same valves as the 2v. But you can add the 4v valves if you want. You just need to make sure you unshoud the intake valve for better flow. You can also get them from Powerheads.com. I don't know their quality.

 

The chamber is actually a little smaller than the quench 4v's; they give the highest compression of any factory cleveland/400 heads.

 

Yes, they are a combo of 4V and 2V heads. Good for street performance. The quench head design is excellent, in that it can use a higher compression ratio, and the quench portion extinguishes the flame front, allowing those compression points with less chance of ping. The open chamber heads of the early 70's Clevelands were prone to pinging unless high octane was always used. I have a stock 351C 4V running pump gas in my 71 Torino GT, and I have never gotten ping from it. I will do the valve seat hardening when I do a rebuild. For now, valve saver additive will do the trick!
Mark


https://www.ford-trucks.com/user_gallery/displaythumbnail.php?&photoid=5362&.jpg
Ford started it; Ford will finish it!

 

Hello,

it has come to my attention that not all the aussie heads have the same combustion chamber size. There is a casting number on the intake port runner that you should look for. i have bought aussie heads on ebay and the date casting numbers suggest that i have one head from 1976 and the other from 1970. but i have the same casting on either of the runners which is ARD1AE (indicating an aussie head) and the other being 6090AC on both heads,indicating same combustion chamber size (apparantely) so even though i have a 1976 and a 1970 head, they should be the same combustion chamber volume (assuming never machined) i have learned this from this web page, take a look: http://www.geocities.com/provamo72/SLGoose_Heads_1.html

if anyone knøws more, then speak up.

i dont think that using a 1970 head with a 1976 one would be a problem, as long as the combustion chambers size match. Opinions on this?


Hope this clears things up a bit...

Thank you!

 

I've heard 58cc to 62cc. So to be sure I would get them cc'd

 

Hate to break this to you but Ford Australia did not make closed chamber 2v heads until the very end of 1971/early 72. The reason for this is that they did not start selling 302C motors until the introduction of the XA falcon, which was only available from (very)late 71. The 1970 heads you mentioned could only be open chamber (ie normal 351C type) heads if they *were* indeed cast in 1970.

 

It's hard to find a virgin 302C head. If the valves are changed or the head resurfaced it will affect the volume. The Goose heads in the pic have 55 written next to the chamber. Probably 55cc. They were definately resurfaced. If you saw a pic of the stock chamber it would be obvious. I think the stock chamber is pretty close to 62cc.

 

werk - thanks for the link!

it looks like there WERE some aussie open-chamber heads...

what i'm wondering about is whether the ones to get (U.S. 2v ports w/ quench) are called "aussie 2v heads" or "aussie 4v heads"?

 

never mind - looks like they're aussie "2v" heads. answer was here, in the 2nd post:

https://www.ford-trucks.com/dcforum/DCForumID12/1041.html#3

looks like this may be a good guy to buy them from, for anyone who's interested...

 

2V isn't the correct term for Aussie heads because they made 4V engines that used the small ports like the US 351 2V heads.

All 302C and 351C Australian made heads were small ports with 2.04" intake and 1.65 exhaust valves.

The 302C heads had a quench chamber. The 351C heads were open chamber.

Both engines used 2V and 4V intake manifolds with small ports. Either square bore and spread bore 4V carbs and manifolds were used.

The 351C heads are nearly identicle to the US 351 2V heads, so they are really nothing special. Clear as mud?

 

>Clear as mud?

so it's really the aussie 302 heads that everybody wants?