Valves
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From: All humans are vermin in the eyes of Guru VA
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Valves
So I need valves.
Is there a quanifiable performance difference between the ferrea 5000 hi-po valves and the ferrea 6000 comp valves?
Enough to justify 5 bucks more a valve?
Will the 5000 series valves stand up to 16 psi of boost?
Is there a quanifiable performance difference between the ferrea 5000 hi-po valves and the ferrea 6000 comp valves?
Enough to justify 5 bucks more a valve?
Will the 5000 series valves stand up to 16 psi of boost?
Safety Car
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just curious why you bought the heads without any valves/springs ect?? i thought it was better to get them already matched up? just curious why you went this route,,,since i also am in the market,,,thanks carl----------------------------------------------
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From: All humans are vermin in the eyes of Guru VA
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well I dont have alot of money. Almost all other aluminum heads were around 800 bucks bare, 1000-1300 assembled.
Mine were 550.
http://forums.corvetteforum.com/show...572&forum_id=3
So it breaks down like this
550 for the heads
50 for the springs
29 for the retainers
24 for the locks
160 or 240 for valves
and I dont need studs so thats my total cost.
Mine were 550.
http://forums.corvetteforum.com/show...572&forum_id=3
So it breaks down like this
550 for the heads
50 for the springs
29 for the retainers
24 for the locks
160 or 240 for valves
and I dont need studs so thats my total cost.
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From: All humans are vermin in the eyes of Guru VA
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GM part
I could get the LT4 springs that is only 32 bucks
Which changes it too
33 springs
15 retainers
8 for locks
then I can have the same valvetrain as a zz4
I could get the LT4 springs that is only 32 bucks
Which changes it too
33 springs
15 retainers
8 for locks
then I can have the same valvetrain as a zz4
Last edited by Guru_4_hire; Nov 13, 2005 at 09:33 AM.
Le Mans Master
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From: Little Rock AR
Originally Posted by Guru_4_hire
So I need valves.
Is there a quanifiable performance difference between the ferrea 5000 hi-po valves and the ferrea 6000 comp valves?
Enough to justify 5 bucks more a valve?
Will the 5000 series valves stand up to 16 psi of boost?
Is there a quanifiable performance difference between the ferrea 5000 hi-po valves and the ferrea 6000 comp valves?
Enough to justify 5 bucks more a valve?
Will the 5000 series valves stand up to 16 psi of boost?
I don't really know enough to answer with anything to add but for a boosted application, I would throw an extra $40 at the valves for the insurance if it was for added durabillity.
-Mark.
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Burning Brakes
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Ferrea's Valve Quality
Ferrea's "least" expensive valves far surpass the best "severe-dutys" you can buy. Not too long ago I had a customer "snap" a Cloyes "Tru-Roller" at 8200 RPM, a 548" blown BB seeing 14# boost and bend 14 of the 6000 series valves (over 800# open pressure) without as much as a single one breaking. The remaining 2 didn't "hit" and stayed intact. This to us shows a quality piece. I've had 2 occasions where a couple of exhaust valve heads "fell" off, again "severe-dutys", while on the dyno being tested and operating at "normal" exhaust temps. And as for buying pre-assembled heads, we'd rather put parts in that we've tested over the years and know will "hang-out". Besides the fact they never seem to have the correct valves, springs, or parts in the package. Thanks, Gary in N.Y.
P.S. Whatever you do, put the best springs you can for the application, this is one area you CANT cut corners. We sell or build nothing with single springs. Comp Cam's been trying their hardest for us to use the new "beehives". While I'm calling the shots, I don't think so!
P.S. Whatever you do, put the best springs you can for the application, this is one area you CANT cut corners. We sell or build nothing with single springs. Comp Cam's been trying their hardest for us to use the new "beehives". While I'm calling the shots, I don't think so!
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From: All humans are vermin in the eyes of Guru VA
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Originally Posted by GOSFAST
Ferrea's "least" expensive valves far surpass the best "severe-dutys" you can buy. Not too long ago I had a customer "snap" a Cloyes "Tru-Roller" at 8200 RPM, a 548" blown BB seeing 14# boost and bend 14 of the 6000 series valves (over 800# open pressure) without as much as a single one breaking. The remaining 2 didn't "hit" and stayed intact. This to us shows a quality piece. I've had 2 occasions where a couple of exhaust valve heads "fell" off, again "severe-dutys", while on the dyno being tested and operating at "normal" exhaust temps. And as for buying pre-assembled heads, we'd rather put parts in that we've tested over the years and know will "hang-out". Besides the fact they never seem to have the correct valves, springs, or parts in the package. Thanks, Gary in N.Y.
P.S. Whatever you do, put the best springs you can for the application, this is one area you CANT cut corners. We sell or build nothing with single springs. Comp Cam's been trying their hardest for us to use the new "beehives". While I'm calling the shots, I don't think so!
P.S. Whatever you do, put the best springs you can for the application, this is one area you CANT cut corners. We sell or build nothing with single springs. Comp Cam's been trying their hardest for us to use the new "beehives". While I'm calling the shots, I don't think so!
I am pretty much sold on the 330585 spring from GM. I do not equate 'expensive' with 'good'
