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  #16 (permalink)  
Old 03-16-2012, 12:04 PM
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Quote:
Originally Posted by F-BIRD'88
The new Assembled GM Bowtie Vortec's are hot too. and true hi perf ready.
I've seen you refer to these heads before, but with no info attached. Could you provide part numbers, etc. so that all the rest of us could take a look?

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  #17 (permalink)  
Old 03-16-2012, 12:11 PM
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Quote:
Originally Posted by techinspector1
I've seen you refer to these heads before, but with no info attached. Could you provide part numbers, etc. so that all the rest of us could take a look?
Read post #10 I have posted the GMPP part numbers on these cool heads many times.

You can by these from any GM dealer parts counter or Summit Racing or Jegs.
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Old 03-16-2012, 12:32 PM
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Here is what Brezinski has to say about the new Bowtie Vortec heads.
http://www.castheads.com/factory_che...tec_bowtie.php

The next vortec head I buy will be one of these.

Last edited by F-BIRD'88; 03-16-2012 at 12:40 PM.
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  #19 (permalink)  
Old 03-16-2012, 04:06 PM
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Quote:
Originally Posted by F-BIRD'88
a quick 1/4 mile drag test (MPH from the time slip) will tell the tale on how much horsepower you have right now with what you go there.
From that you can guestimate the effect of the new heads better.

A wounded motor will not make power. reguardles of what head is on it.

Have you ever been to TMP?

for 400hp w vortec heads you will need $6000 if you do it when way AP72 does stuff. ( Hyd roller s w .550" lift, you really know how to spend his money)

I do it on low buck basic flat top piston vortec 350's w just .450" valve lift hyd cam. and low low dollars near stock , low cost valvetrain. Ha ha
ya just have to know how to skin that (cheapy) cat.

The lowly 268H cam will get you very close. try it first. its not ideal you can upgrade it later.

http://s185.photobucket.com/albums/x...-bird88vid.mp4

do a search on this forum for DENCOUCH. for the dirty details
Its not the power that requires the cam, its making it streetable and taking advantage of the heads. If you're not going over .500" lift there's no advantage in running more port. A bowtie head should get a bowtie cam. Also the added lift with les duration will really make it a street performer rather than a cheap dyno queen. Doing it right does cost more but the bennefits are real. To be honest if it were mine id run chinese heads and a hyd roller cam over bowties and a flat cam. The vortec bowties are nice but there's only so much money.
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Old 03-16-2012, 04:21 PM
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Can any one make any sense out of any of that.
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Old 03-16-2012, 10:30 PM
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Quote:
Originally Posted by F-BIRD'88
Here is what Brezinski has to say about the new Bowtie Vortec heads.
http://www.castheads.com/factory_che...tec_bowtie.php

The next vortec head I buy will be one of these.

so after some research im gonna save for the assembled bow tie vortec heads, but which ones would you recomend? the 225 or the 180 they are both around the same price assembled. Ive read that the smaller port was getting more hp gains. Oh and any product numbers on self aligning rockers? ive found a few different brands, but wanna know the best match. Oh and screw that $600 budget lol im just gonna wait a bit longer and get good parts
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Old 03-17-2012, 07:46 AM
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GM self aligning rockers (fine for that cam lift)
GM pn 12495490

The tests comparing the 185 port to the larger port probabily was the first version 215cc port head. These large port bowtie heads are now revised to 225cc.

ya its big but they make power. All the stuff I have seem on these big revised versions shows they make big power.

The 185cc head has a slight advantage at low rpm with mild cams.

You need to decide where you want to take this.
With larger cams etc the newest larger port versions make the most power.

if you will never build a motr more radical than the one you got now,
the small port may be best.

if you ever want to build a more radical more powerfull motor ( bigger cam etcc etc) than what you got, in the future, then invest in the larger 225cc port heads, now.

if you don;t want to have to use the self aligning rockers and a vortec specific intake manifold, then buy the BrodixIK200/Summit aluminum heads.

Either path gets you into a powerfull quality cylinder head, substancial power increasse over stock heads or S/R replacements,,, with room to grow.

Does your motor have a flat top or a dished piston?
Getting the compression ratio correct is critical to makeing power.
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Old 03-18-2012, 08:29 AM
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Quote:
Originally Posted by F-BIRD'88
GM self aligning rockers (fine for that cam lift)
GM pn 12495490

The tests comparing the 185 port to the larger port probabily was the first version 215cc port head. These large port bowtie heads are now revised to 225cc.

ya its big but they make power. All the stuff I have seem on these big revised versions shows they make big power.

The 185cc head has a slight advantage at low rpm with mild cams.

You need to decide where you want to take this.
With larger cams etc the newest larger port versions make the most power.

if you will never build a motr more radical than the one you got now,
the small port may be best.

if you ever want to build a more radical more powerfull motor ( bigger cam etcc etc) than what you got, in the future, then invest in the larger 225cc port heads, now.

if you don;t want to have to use the self aligning rockers and a vortec specific intake manifold, then buy the BrodixIK200/Summit aluminum heads.

Either path gets you into a powerfull quality cylinder head, substancial power increasse over stock heads or S/R replacements,,, with room to grow.

Does your motor have a flat top or a dished piston?
Getting the compression ratio correct is critical to makeing power.

Alrighty so im making a budget up, im going with the bigger 225 heads, and those rockers, also the performer RPM intake, looking around $1400. Oh and i havent taken the stock heads off yet, so im not sure about the pistons.
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Old 03-26-2012, 02:03 PM
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Quote:
Originally Posted by F-BIRD'88
The edelbrock rpm vortec manifold you want is PN7116

The cool air gap version is #7516.

I use the slightly lower cost Professional Products Crosswind vortec manifold.
(cause I'm cheap)
They both work great.
So my friend's dad who has been helping me rebuild my engine, says that if i add those bowtie heads and vortec manfiold, im gonna have to strengthen my low end, like new pistons and stuff. Any takes on this?
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Old 03-27-2012, 07:59 AM
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Hay it depennds on what u plan to do if its just a street car best way and cheap is pro comp heads thay work good and don't cost as much as reboulding stock heads? So that's what I did and I'm verry happy with them
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Old 03-27-2012, 08:15 AM
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Quote:
Originally Posted by MonteCarlo80
So my friend's dad who has been helping me rebuild my engine, says that if i add those bowtie heads and vortec manfiold, im gonna have to strengthen my low end, like new pistons and stuff. Any takes on this?
If you want to take advantage of the ports then yes you need to have your bottom end rebuilt. Those ports will be enough to support 7,000 RPM, and a stock lower end can't handle that. Additionally you're going to need a bigger cam to bennefit from the large ports, with more lift, probably a good hydraulic roller or solid roller, so there's another $800 you didn't account for...

225cc ports is a BIG head for a 350ci sbc. it's a typical size in racing but I don't think you're ready to build a race engine.

For a stock bottom end I would go with the 185cc versions, have a valve job and bowl work done on them, and pick a new cam to match. You'll have a lot more power in the low and midrange where you'll be running a stock bottom end.
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Old 03-27-2012, 09:10 AM
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Your right thay are a big head but it to pay big money for junk is dumb spend it one time and plan for a rebuild in the futur u don't need to rev it at 7000 rpm and stock coil won't go there any ways to get that kind off rpm you will need a lot more then heads all I was saying is don't spend good money after bad I run a small block and wasted a lot of money on junk I have a set of dubble bumps you can have and thay work good but bigger is allways better o and I have a rpm intake that match it so let me no?
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Old 03-27-2012, 09:29 AM
How fast is fast enough?
 
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Quote:
Originally Posted by 7069camaro@gmail.com
bigger is allways better
This is all you need to say to show you have no clue wth you are talking about.
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Old 03-27-2012, 11:15 AM
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Well must have. A bit of a clue I now run 10.98 and make 500 hp so I don't need your cheap coment come to the track and see all I half say about that and if you the guy with the 350 ill give u dodble bumb heads for free thay put me in the 12s not saying thay are greate but there good get back to me
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Old 03-27-2012, 03:31 PM
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so now that im taking another look at the cheaper heads, should i even consider the pro comp aluminum heads with 190 port? i heard you need different pushrods for them, and the self aligning rocker arms. Also what would be the best intake manifold for this choice? the rpm? or maybe rpm vortec?
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