4valve heads for Vette
Pro
Joined: Oct 2001
Posts: 621
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Re: 4valve heads for Vette (tkrussell)
Over on http://www.chevytalk.com in the performance-related forum, the moderator contacted them months ago asking for literature, prices, etc. He is still waiting.
Team Owner
Joined: Apr 2002
Posts: 62,198
Likes: 1
From: All humans are vermin in the eyes of Guru VA
Cruise-In IV Veteran
Cruise-In V Veteran
Re: 4valve heads for Vette (L79vette)
Le Mans Master
Joined: Oct 1999
Posts: 6,366
Likes: 34
Re: 4valve heads for Vette (tkrussell)
I have been keeping an eye over here hoping for updates http://www.houston-f-body.org/member...ail.php?ID=391
I have been looking all around for someone in the real world who has ran them.
The arao shop is about 25 mins from my house, I cruised by one night, it is just a machine shop. I never seen anything running thier heads.
I have been looking all around for someone in the real world who has ran them.
The arao shop is about 25 mins from my house, I cruised by one night, it is just a machine shop. I never seen anything running thier heads.
Race Director
Joined: Dec 1999
Posts: 16,945
Likes: 9
Re: 4valve heads for Vette (bill mcdonald)
They've been around for some time as the dominion head too. There was a guy on one of the F-body forums running them but I lost the site.
I don't have the $$ to run those :(
Marck
I don't have the $$ to run those :(
Marck
Safety Car
Joined: Aug 2001
Posts: 3,892
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From: Pettis Performance 565 with two stages of Nitrous Supply nitrous 1.082, 4.61 at 155, 7.17 at 192
Re: 4valve heads for Vette (Twinnie)
I read a report on these a while back and I remeber they claimed 100 HP gain over heavily ported after market heads. They also said they were very hard on valve train parts. I do not know of anybody who has them either.
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Safety Car
Joined: Feb 1999
Posts: 3,631
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From: Fountain Hills AZ
Re: 4valve heads for Vette (bowtie racing)
Fogetem!
trust me ,if they perform as good as they do it on paper every single hardcore racer woud use em :smash:
trust me ,if they perform as good as they do it on paper every single hardcore racer woud use em :smash:
Drifting
Joined: Jun 1999
Posts: 1,874
Likes: 1
From: Garden Grove CA
Re: 4valve heads for Vette (tkrussell)
Arao Engineering = Dominion
I have seen their product, for the last couple of years they have set up a booth at the L.A. Roadster Show on Father's day weekend. I also have their literature.
All I can say is that outside of the L.A. Roadster show that I have never seen anyone run these heads, for show, or for racing. I had seen F-body postings where a guy inTexas really went to town on an engine using these heads - he did not make good power and was very frustrated.
So at least for the moment I will have to classify these heads as wishful thinking, but not fully developed.
Thomas
I have seen their product, for the last couple of years they have set up a booth at the L.A. Roadster Show on Father's day weekend. I also have their literature.
All I can say is that outside of the L.A. Roadster show that I have never seen anyone run these heads, for show, or for racing. I had seen F-body postings where a guy inTexas really went to town on an engine using these heads - he did not make good power and was very frustrated.
So at least for the moment I will have to classify these heads as wishful thinking, but not fully developed.
Thomas
Team Owner
Joined: Apr 2002
Posts: 62,198
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From: All humans are vermin in the eyes of Guru VA
Cruise-In IV Veteran
Cruise-In V Veteran
Re: 4valve heads for Vette (The Green Rocket)
It still would be interesting to see GM do more with their northstar system it has so much potential
Race Director
Joined: Dec 1999
Posts: 10,230
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From: Alexandria, Virginia, USA VA
Re: 4valve heads for Vette (Guru_4_hire)
just buy a ZR1. GM/Louts/Mercury Marine did it for you. they run really well. I have 3 of them. I would go with some exotic SB2 or nice AirFlow research heads and leave these alone. they don't really flow well enough to justify the expense and you are putting too much load on the pushrods IMHO with opening the 2 valves.
a true DOHC is a much better design from an efficiency standpoint. Batten used to make true DOHC conversions, but you could spend 10K on the heads getting started.
for the price of the engine, you have a complete ZR1 ready to rock.
IMHO, fully developed DOHC heads are not on par with good old pushrod tech on the SB. buy a "used" nascar engine, lower the compression, and call it a day. :D
a true DOHC is a much better design from an efficiency standpoint. Batten used to make true DOHC conversions, but you could spend 10K on the heads getting started.
for the price of the engine, you have a complete ZR1 ready to rock.
IMHO, fully developed DOHC heads are not on par with good old pushrod tech on the SB. buy a "used" nascar engine, lower the compression, and call it a day. :D
