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Author
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Topic: 351C heads
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Mach won
Gearhead Posts: 137
From: Walnut Grove, Ca. USA
Registered: Nov 2004
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posted 03-26-2005 11:19 AM
   
http://cgi.ebay.com/ebaymotors/ws/eBayISAPI.dll?ViewItem&rd=1&item=7963055674&category=33617&sspagename=WDVW
What do you guys think of these heads?
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Bloose
Gearhead Posts: 755
From: Milwaukee, WI
Registered: Dec 2001
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posted 03-26-2005 03:28 PM
Boy I hope some of the Clevland guys chime in here. I have alway been a huge fan of the Clevland heads, but with most of the aftermarket Windsor heads it seemed better to just go that route. I have for a very long time wanted to do a Clevor but again with the new heads out there seemed to be little if any benefit.I like the Clevland heads for their canted valve design. Better flow, less valve shrouding probelms, etc, but 4V heads may be too big and the 2V open chambers suck. On top of that both heads have crappy exhaust ports. These heads should address all three problems. Someone in the know please comment on these and their value of sitting on top of a 400cid Windsor! B-loose
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kid vishus
Gearhead Posts: 6405
From: middle of NC
Registered: Oct 2000
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posted 03-26-2005 07:57 PM
Well, I have no experiance with them, but I do have an opinion.  And my opinion is this, they have a nice combustion chamber, and they flow decent numbers, but my old iron 4v heads still outflow them (even the under rated exhaust port.) They are probably a good head, but so far they haven't impressed me. And until I see real world experiances with them, and not some infomercial advertisements, I will continue to be unimpressed.
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32valveGT350
Gearhead Posts: 137
From: Briz Vegas, QLD, Australia
Registered: May 2003
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posted 03-28-2005 07:45 PM
I love my CHI 185cc clevo heads. I've got a itty bitty little cam (.519lift, 218 @ .050) and it hammers (about 420hp at the crank through an unbelievebly crappy exhaust, DD2ks at 445 with a decent exhaust). Its a brilliant street motor.... lotta torque with good topend.
I have plans for a custom solid roller cam which DD2Ks at about 530hp (all i need to do is the cam and exhaust, the rest of my combo is fine), but its not a big cam by anymeans either...
yes, 4V heads flow more for a race car, but they suck on the street on a 351...
Down here in Australia, we have tonnes of 2V Closed chamber heads, so its the nice little ports with the tight chambers, also a great street head. But what did it for me was the cost of built up ready to bolt on CHI's was not really much more than what i was looking at sinking into a set of irons, especially if the hassle factor was included....For 400ci a set of 4V heads would probably ok though... Ben
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DidgeyTrucker
Gearhead Posts: 1539
From: Greenbrier, TN USA
Registered: Oct 99
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posted 03-28-2005 11:43 PM
It depends on what you want to do with a 400W. There is a '65 GT-350 clone around here with a 408W with windsor heads and he doesn't seem to be lacking in any department.Tracy
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Bloose
Gearhead Posts: 755
From: Milwaukee, WI
Registered: Dec 2001
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posted 03-29-2005 12:57 AM
The 400W would just be a street motor. Fairly mild cam maybe solid. I'm sure that a set of AFR's or even Ebroks RPM's would work but like I said I always liked the canted valves of the Clevlands. At $1500 a pair they're not out of line.B-loose
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kid vishus
Gearhead Posts: 6405
From: middle of NC
Registered: Oct 2000
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posted 03-29-2005 07:24 AM
The initial pric emay be right, but for what you are doing, a set of windsor heads would be better. To make the cleveland style heads work will require a special intake, and/or a water crossover, and special pistons. All more money than if you were to stick 'normal' windsor heads on it. Then finding headers that fit becomes a major issue. Standard cleveland headers will bolt up, but since they are on a wider and taller block, fitment becomes a PITA (I know from first hand experiance.)
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72Qsam
Gearhead Posts: 123
From: Petaluma, Ca, USA
Registered: Nov 2003
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posted 03-29-2005 09:46 PM
edelbrock just came out with come aluminum heads for the cleveland too, just fyi
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kid vishus
Gearhead Posts: 6405
From: middle of NC
Registered: Oct 2000
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posted 03-30-2005 06:59 AM
quote:
Originally posted by 72Qsam:
edelbrock just came out with come aluminum heads for the cleveland too, just fyi
But their heads haven't been released yet (they are on hold and no one knows when they will be released), and from everything I have seen, they actually don't flow any better than mildly ported 2v heads.
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Bloose
Gearhead Posts: 755
From: Milwaukee, WI
Registered: Dec 2001
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posted 03-30-2005 08:45 PM
quote:
Originally posted by kid vishus:
The initial pric emay be right, but for what you are doing, a set of windsor heads would be better. To make the cleveland style heads work will require a special intake, and/or a water crossover, and special pistons. All more money than if you were to stick 'normal' windsor heads on it. Then finding headers that fit becomes a major issue. Standard cleveland headers will bolt up, but since they are on a wider and taller block, fitment becomes a PITA (I know from first hand experiance.)
Very interesting. The pistons are no problem as I'd have to put something in there. Maybe some Boss 302 Pistons?
The headers would be a big problem. I thought some one was making an intake to fit this setup again? No? So Kid, do you think there are some inherent benefits to the canted valve heads of a Clevalnd. Is it your thought that there is but not worth the hassle of putting them on a W block? It just seems there is so much for the W blocks over the C blocks that the few obsticles would be worth the trouble. I guess at this point I'll probably end up with some W heads. I'm actually thinking about those new heads from Dart. They're like $900 complete. Either that or another set of AFR's. B-loose
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kid vishus
Gearhead Posts: 6405
From: middle of NC
Registered: Oct 2000
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posted 03-30-2005 10:34 PM
The advantage they used to have was before the aftermarket started making good windsor heads. Now the aftermarket is flooded with good heads that just bolt on that will flow more than well enough for 90% of the windsors out there. I think (just guessing here) that the only reason my motor ended up with cleveland heads on it was due to rules restriction in the heads up class the previous owner was running. That and after a couple of grand spent on porting and epoxying they flow like gangbusters. Not sure about the intake. My intake is designed for raised port C heads on a 9.5 deck, but it has no water crossover. Thankfully KK's brother is a welding genius and made a crossover for me (saved me from paying $150+ for the same thing from the aftermarket.) Headers; my super comps fit well on my car with the pure cleveland. They were tight, but they fit well. By switching to a windsor block with cleveland heads, they became a major issue to the point they da*n near dont fit now.
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