32 valve heads

Guys, Hopefully I did this correct. These are pics of my second 4 valve build for twin T88 turbos in my GN


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These are pics of my GN with mock up motor for the twin turbo header fab.

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I see one of the things that has not been discussed is the fact one can get a broader operating range with the 4 valve heads as they flow well at high speeds and yet maintain a good port velocity at lower speeds so they work well at normal street speeds and idle.

Provided of course the particular heads are well designed..

Sam

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I have tried most all of it and now do what is known to work..

Here are some pics of my GN in action with with my first set of Dominion 32 valve heads. This was a NA motor. My second build has Arao generation heads that will be turbocharged.

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I noticed a big difference on the street with these heads, bottom end is smooth and all the way to 9000 they are perfect. As for only buying stuff new, sorry thats not how I roll. I would love to buy everything new but my last name isn't Trump. I'm the kind of guy that will ware a part down to a nub before I go new. As long as it makes power it'll do.

Awesome!, I got to ask what compression will you be running with that TT as I noticed your using a flat top type piston as I have on mine, This is great, we could be related lol as I am finishing up this N/A 428ci 32v one first and then want to do a TT setup also for the other 32v set I have . I plan on putting this in a mustang II monroe s/g type street car im putting together similar to this...

There's just something inherently wrong with anyone who doesn't get turned on by a plethora of valves, cams, chains, and other assorted gizmos working in unison to create that music which only a true gearhead can hear.


I've played with The Northstars for 5 or 6 years now, and played with SBCs for 40+ before that (and still do), but until now I never knew there was an obtainable 32V head for the Chevy. that's just too cool, and if I wasn't nearing retirement (read "poor") I'd have a set of those in my shopping cart in a heartbeat.

Just wanted to confirm that there are those of us here that truly do enjoy hearing about this information and appreciate the info.

Cheers,
Russ

or, K.I.S.S. like chevy does and keep port velocity at lower rpm. and ram it down the intake with a blower..

everything has it's place, but if the top ford 32 valve 5.4ltr gets laughed at by a pushrod 16 valve 5.7 zo6..
the 4 valve ectra parts are not always better..

double'n my chances of droppinga valve, where do I sign up..

Hi, I am Very glad theres those of you out there that are enjoying the tech info on this multi valve stuff. There is SO much BS / missinformation particulary on the multi valve pushrod stuff that it is a big reason I wanted to get some facts/tech on the net about it. On most forums I Always get some 2v die hard/s trying to twist/spin things infavor of the old 2v stuff but the fact remains there is NO! 2 valve head out there that can out flow a simular/well designed 4 valve head and other benifits of multi valves that OneMoreTime has mentioned above.

Here is a link to some independent flow data with my 4v dominion sbf heads (half way down the page), that you can see NO 2v head can match the low and mid lift flow #'s of the 4v which ='s more/better cly filling at high lifts.

http://www.carbdford.com/tech/flowdata.htm

Also wanted to mention that Mr Crower also made a billet 4 valve pushrod sbc head years ago for his bonneville streamliner that made a few waves back then that Chevy made prototypes of considered for mass production. I have to find/dig out a old mag artical on it but here is a bit of interesting info on it for now (bottom of page in link).

http://www.crower.com/crower-history/

You can see a bit of the 4v head in this old pic, I understand he made these in two piece for cutting out water passages and then doweled them together. They use the same style of porsche adjuster foot as the other pushrod versions, the valve cover style reminds me more of a 32v Weslake style of head.

Just a thought about these billet version heads as what my 32v dominions are, casted heads are ok but I feel any really really good/superior head will cut from Billet today. With ALL of todays cnc machines out there today its MUCH easyer than ever to do, an example of a new Trick Billet 4 valve head that I predict will really piss off some of the 2 valve guys lol.

http://dragbikelive.com/news/12087/...d-we-have-pics/


Here is a quote I really like from...

http://www.dragbike.com/dbnews/anmviewer.asp?a=2813&z=3

...(“The only people that will tell you a 2-valve is just as good as a 4-valve – they are either covering their bases, protecting their own interests, have their own personal agenda or they don’t know what they are talking about.”)...

Just wanted to repost this here too, its a 4 valve pushrod Vtwin record holder (green one/overkill racing) going up against a 2 valve pushrod Vtwin counter part, you can see the 4V Feuling logo on the top corner of the rocker box...

http://www.streetfire.net/video/ove...2-in_107753.htm

http://www.hotrodders.com/gallery/s...7/cat/500/page/

Here are a few more interesting close up pics of the valvetrain on the Weslake 32v heads which again the Dominion and Arao versions valvetrain designs were modeled after. I understand these Weslakes were dyno tested at over 600 n/a hp on a 327ci sbc with a very wide power band, street pump gas and a stock type cam.

rockster, how fast were you going with your N/A combo?, wondering about ci, tranny and how heavy this car is also. Looks like the car launches hard.



also these pics are not the best but they are a set of the 32v sbc billet versions that were recently for sale in cali on craigslist.

Is there any water jacketing on the billet heads? I would think that would be somewhat of a "challenge" to say the least. I think I see a couple small spare holes in the decks, but not much.

also. what is the rocker arm ratio used? some pics look to be ~ 1-1, wile others, especially the shots of the intake side, look closer to 1.5 - 1. just wondering if they do something with the ratio here to allow the use of more "traditional" cams, but still come up with the lower valve lifts needed for the 4V?……... or maybe I'm just overthinking this

do you know what the Craigslist heads sold for?

Thanks,
Russ

Hi, yes there were 32v sbf/sbc billets versions drilled and bored out for a water jacket and then sealed with frost type plugs and/or welded up afterwards, the same/simular process is being done with todays other 2 valve billet head offerings. You can see some of the coolant plugs in the Dominion 32v sbf version billets here.



The rockers on the sbf/sbc 32v heads have a 1.40 ratio so it is possible to use a standard sbf/sbc blower/turbo 2v type grinds. 4V heads dont need high ratio rockers, so the 4 valves lower ratio rocker also helps with less valve strain stress and better valve control. High valve spring pressures are also not needed as the 4 valves are smaller so spring pressure is (avg 100/110 seat pounds ea), this also helps the valvetrain and high rpm performance. One of the best things to do today is to upgrade to beehive springs on all of these 32v versions.



The 32v billet sbc heads for sale on craigslist were used Arao billet versions so they were more than the cast sbc Dominions I have seen for sale, I think the asking price was just over 4grand. Just recently there was a set of used cast 32v Dominion versions that I think sold the same day they were advertised for 2grand. There are diffrent port "stages" (1,2,3...) of these heads made out there, they are not all the same, Hal made it harder to modify the heads to diffrent stages but luckily billet can be welded on easyer for diffrent mods.

http://www.racingjunk.com/Drag-Raci...-32v-heads.html

These are the 32V Arao sbf billet versions.

http://www.themustangnews.com/conte...-block-mustang/