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  #16 (permalink)  
Old 05-15-2012, 12:30 PM
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Something like this? http://www.summitracing.com/parts/CMB-08-0034/

Any idea if I can use the rockers from my existing heads with these?

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  #17 (permalink)  
Old 05-15-2012, 02:09 PM
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Or....http://sdparts.com/details/scoggin-d...ter/sd8060arpm
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  #18 (permalink)  
Old 05-15-2012, 08:06 PM
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what kind of deal on the afr's?

what size afr's?
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  #19 (permalink)  
Old 05-15-2012, 08:47 PM
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They ended up being too big for what I need 195's for $850.

I think I am going to order the vortec kit, long tubes, floor shifter, and be done with it.
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  #20 (permalink)  
Old 05-16-2012, 05:08 AM
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195 afrs would work OK. Plus give you room to grow

light car, 3.73's, 700r low first gear, mid size cam, and a dual plane intake will allow you to use the slightly big 195 afrs.

if you go vortec, then you will ned to change to a vortec intake, vortec rockers, and vortec valve covers.
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  #21 (permalink)  
Old 05-17-2012, 03:10 PM
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I decided to go with the Vortec top end kit which includes modified vortecs to allow for .525 lift, E-brock RPM intake, and supporting hardware.

My question now is which cam? I have gotten mixed reviews on single pattern vs dual pattern for this setup.

Comp Recommended the following...

12-246-3
1800-6000
XE274H
274
286
230
236
.490
.490
110

My other thought was maybe the..

Lunati 227/233 at .050, .489/.504 on the lift, and it is cut on a 110 LSA
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  #22 (permalink)  
Old 05-18-2012, 05:24 AM
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I would avoid XE or voodoo cams. Very aggressive lobes that have a much higher rate of going flat.

vortecs have poor flowing exhaust ports so they do better with dual pattern cams. However, if you are using full length headers and free flowing exhaust the gains will be minimal.

Consider the old school 280H compcam (230/230). It will make a little less hp but will tend to live longer.

I would use a regular RPM intake (not air gap) with square flange and get a 750 holley 3310.
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  #23 (permalink)  
Old 05-18-2012, 06:16 AM
How fast is fast enough?
 
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Quote:
Originally Posted by SoCa06Z
I decided to go with the Vortec top end kit which includes modified vortecs to allow for .525 lift, E-brock RPM intake, and supporting hardware.

My question now is which cam? I have gotten mixed reviews on single pattern vs dual pattern for this setup.

Comp Recommended the following...

12-246-3
1800-6000
XE274H
274
286
230
236
.490
.490
110

My other thought was maybe the..

Lunati 227/233 at .050, .489/.504 on the lift, and it is cut on a 110 LSA
I hope you didn't order these heads already, nor the cam. Stock vortec heads will not give you enough compression, the chambers need to be cut down and they're a thin head to begin with.

If money is tight id go with a set of the 210cc 56cc chambered procomp heads. And then get a solid cam with face oiling lifters, or at least grooved lifter bores.

Thin casting vortec heads are good if you can pick up a complete used set for $100, but they are NOT a performance head. The small port bowtie vortecs would work well but they're not cheap.
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  #24 (permalink)  
Old 05-18-2012, 06:16 AM
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Quote:
Originally Posted by SoCa06Z
what were thought to be Vortec heads are actually old swirl port heads that aren't worth a damn past 4k RPM.
I was gonna say the end design on the cylinder head didn't look correct and the intake bolts had the 12 bolt pattern and angle not the vortec's 8 bolts.

If you can source some vortec heads that aren't cracked for a good price grab em. I have a set on my 355 in my oldsmobile and love them. What an upgrade from the 441s.
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  #25 (permalink)  
Old 05-18-2012, 08:01 AM
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1.21 giga-watts???!!!!
 
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Quote:
Originally Posted by ap72
I hope you didn't order these heads already, nor the cam. Stock vortec heads will not give you enough compression, the chambers need to be cut down and they're a thin head to begin with.

If money is tight id go with a set of the 210cc 56cc chambered procomp heads. And then get a solid cam with face oiling lifters, or at least grooved lifter bores.

Thin casting vortec heads are good if you can pick up a complete used set for $100, but they are NOT a performance head. The small port bowtie vortecs would work well but they're not cheap.
Typical half-baked reply in an effort to come off as the expert. What info do you base your compression needs on. Vortec heads are 64 cc chambers. Depending on deck height, gasket used, piston type his CR will be perfectly adaptable to the XE-274 cam. Perhaps you could point out where any of the above specs of his engine were stated? If he has pop up pistons then his compression ratio is 11.25 to one. Guess what? The XE-274 isn't enough cam then. To the OP, here is an excellent website edited by two of our most accomplished and respected members that will tell you how to decide what cam you need. http://www.crankshaftcoalition.com/w..._compatibility This site should be about education, not just spouting off numbers trying to impress.

Perhaps you could also explain how you can justify even suggesting 210 cc intake heads on a 327 for this engine? Did he say he was driving on the street or racing this car? He didn't say either, so you're just shooting from the hip and recommending a port size more conducive to upper rpm range is irresponsible to say the least.

Or your next contradiction blasting the original vortecs for not providing enough compression yet saying the Bowtie Vortec heads would be good. Even though they have the same size chamber?

Last edited by cool rockin daddy; 05-18-2012 at 08:23 AM.
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  #26 (permalink)  
Old 05-18-2012, 08:37 AM
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1.21 giga-watts???!!!!
 
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SoCal06Z,
All the manufacturers make excellent top end kits with heads, manifold, and cam profiles matched to what their heads flow. Consult with them, NOT Summit, Jegs, and the other mail order houses. Know this about the different cam files in a family of cams: they all make just about the same amount of power, it is just where the power band is moved to. You can see this for yourself on the CompCam website where they show the power graphs for the XE Cams. IF you use vortec heads, the XE 268 will get you your 400 hp. If you don't want to use the aggressive cam lobes of the XE cams (some people say they are too rough on the valve train) go to the Magnum series of cams from Comp or the equivalent from Isky, Crane, Howards, etc.

You really need to know what your compression ratio is and where and how this sweet little car is going to be driven. The rest will fall in place like dominoes.
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  #27 (permalink)  
Old 05-18-2012, 10:11 AM
How fast is fast enough?
 
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I assumed flat top pistons in his 327, which it likely has. The 210 runners are a little big but the'll work fine, those heads are the cheapest ones I know of to get him the compression he needs with 4vr flat top pistons.

The bowtie vortecs would be better than the procomp heads if they were milled to get you the compression you need. They're also a lot more expensive
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  #28 (permalink)  
Old 05-18-2012, 12:15 PM
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1.21 giga-watts???!!!!
 
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Oh, so you assumed when you made your bold proclamations. Do you always make assumptions when building all those engines you do? Interesting.

Those 210 cc heads would be terrible and I would bet that if you called Dart, Brodix, AFR, and Edelbrock they would say the same thing.

Also would be interested in what you consider expensive since the Bowtie Vortecs since you can pick up a pair of complete heads for a grand.
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  #29 (permalink)  
Old 05-18-2012, 08:39 PM
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are those pics of the ACTUAL engine in your Nova?
It looks to be a late model engine with the casting marks and center bolt covers..
Could be a 305.
Did you check the casting #'s before you purchased it?

If the rest of the drive train can't handle the 400hp that your after, it could break things quickly.

A late model 6.0 (Ls style block), level-10 200r4, and a fab-9 rear 4 link (or Hotrods to hell suspension) and you'll be very happy!


E
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  #30 (permalink)  
Old 05-18-2012, 09:11 PM
How fast is fast enough?
 
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Quote:
Originally Posted by cool rockin daddy
Oh, so you assumed when you made your bold proclamations. Do you always make assumptions when building all those engines you do? Interesting.

Those 210 cc heads would be terrible and I would bet that if you called Dart, Brodix, AFR, and Edelbrock they would say the same thing.

Also would be interested in what you consider expensive since the Bowtie Vortecs since you can pick up a pair of complete heads for a grand.
I consider a grand a sizeable amount of money, and don't forget the additional cost of milling. Maybe I'm cheap but with all the projects I have going on at once I have to be.

On my engines I don't have to assume, I have the luxury of measuring.

Btw terrible is a bit of a stretch, they're not optimal but far from terrible.
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