Aussie Head Question
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Senior User
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From: Green River USA
Aussie Head Question
Hey I was wondering what kind of compression Ratio you would get with Aussie heads and stock (8.0:1) pistons in a 78 400? Also with "High-compression" (8.4:1) pistons made by Badger? This is assuming with NO MACHINING WHATSOEVER. I am looking for about 9.5:1. Also, are they worth the 300-400 you pay for them? Do any mods need to be made in order to fit them? Thanx for the help.
Senior User
Joined: Aug 2001
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Aussie Head Question
whooops, 400?
I replied to your other post thinking it was a 351 Cleveland, that will change some things.
335C
PS, I wouldn't blueprint a 400, but that's just me, I'm sure there are plenty who would.
I replied to your other post thinking it was a 351 Cleveland, that will change some things.
335C
PS, I wouldn't blueprint a 400, but that's just me, I'm sure there are plenty who would.
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Joined: Feb 2001
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From: Porterfield
Aussie Head Question
I'm thinking with aussie heads you gain 1.5 points of comp. Not positive for sure though. Are they worth the money. ..YES.. every penny you spend on them .. Bigger valves, unsheroding the valves, gasket match porting, and a little bowl work... and you get more then your money's worth's in a set of heads for street use and mild strip use.
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From: Green River USA
Aussie Head Question
11:1?!?!?!? That seems awfully high to be running on pump gas. Are you sure about that? You mean Premium don't you? I CAN'T live with having to add octane boost every time I fill up so this is an important aspect for me. 11:1? So with that kind of comp do you think you could pull 500 ponies out of a 400? Thanx
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Joined: Sep 2001
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From: Jax FL
Aussie Head Question
[updated:LAST EDITED ON 15-Jun-02 AT 05:43 AM (EST)]pump gas octane needs will vary with cam duration and timing. most often running that high of a cr will need the more expensive fuels. you should be fine with 92-94 octane and no additives. for me, i want 11.7:1, gas is not a concern.
dynagear and ohio pistons make flat top 400 pistons. dynagear has a website and a phone number on that site.
http://www.dynagear.com/
dynagear and ohio pistons make flat top 400 pistons. dynagear has a website and a phone number on that site.
http://www.dynagear.com/
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Tuned
Joined: Jun 2001
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Aussie Head Question
>pump gas octane needs will vary with cam duration and
>timing. most often running that high of a cr will need the
>more expensive fuels. you should be fine with 92-94 octane
>and no additives. for me, i want 11.7:1, gas is not a
>concern.
>
>dynagear and ohio pistons make flat top 400 pistons.
>dynagear has a website and a phone number on that site.
>
>http://www.dynagear.com/
So - the 9:1 pistons are flat top?
>timing. most often running that high of a cr will need the
>more expensive fuels. you should be fine with 92-94 octane
>and no additives. for me, i want 11.7:1, gas is not a
>concern.
>
>dynagear and ohio pistons make flat top 400 pistons.
>dynagear has a website and a phone number on that site.
>
>http://www.dynagear.com/
So - the 9:1 pistons are flat top?
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