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help me figure out what heads i wanna get

V

VisionxOrb

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Ok, heres the situation, have a rebuilt motor(pulled from the blazer) in the camaro with your basic 76cc smog/junk heads. broke a rocker that took the vavle with it so Im pulling the heads but I dont want to put any money into heads them im gonna change later on so Im gonna get new heads now. I was looking at the chevy head flow database (chevyhiperformance.com) and the vortecs out flow everything but AFRs and canfield. Know I know scoggin dicky sells upgrades vortec heads but I really want to run roller rockers for piece of mind and I dont think I can on these because they dont mention guide plates and Id rather not have to work on them before I put them on so, what about the jegs heads, I thought I remeber reading that those were canfields?? ao they should flow good ya? and thoughts greatly apreciated.

P.S I need a head I can get very soon so I cant do the AFRs they take like 6weeks to get and i need these asap.

P.P.S These are right now going on a mild 350 w/ flat top 4 relive valve pistions and mild came but eventually are gonna wind up on a 383 with and comp xe274 cam.
 
Edelbrock E-Tecs outflow Vortecs(aluminum too), Fastburn GMs are nice(e-tecs and Fastburns are almost the same). Fastburns are aluminum as well. You can run Roller Rockers on vortecs you just have to get self aligning roller rockers. Can't use guideplates on vortec heads cause with the self aligning rockers it would casue binding in the pushrod. If you want cheap go with Vortecs, if you don't mine spending almost a grand on heads go with E-Tecs or Fastburns. Both E-Tecs and Fastburns are Vortec based heads that use the special Vortec intakes.
 
My vortec heads are doing great with guide plates. I got the upgraded ones from scoggin dicky your talking about and they come with screw in studs. One of the reasons you want to run guide plates is so you dont have to use self aligning rockers. I havent seen any thing on the E-Tech heads but If they flow the same as Fastburn then they flow the same as Vortec. The only differance between Vortec and fast burn is Fastburn are aluminum and they have a heart shaped combustion chamber not a d-shaped chamber like Vortec. I don't see why that would make them flow better just a better more efeciant burn and they can handle a little more compresion. Your best bet is to call Scoggin Dicky tech line and see if Vortec heads will do what you want (I think they will) unless you want to spend the extra money on the fasburn heads.
 
Hard to beat the World Product Dart 2 heads. You can get them through Jeg's. Not sure what the compression would be, but a 64cc head would pump it up some. /forums/images/graemlins/wink.gif /forums/images/graemlins/cool.gif /forums/images/graemlins/thumb.gif
 
I have for words for ya...

Summit Racing
Trick Flow

I have a set of the angle plug, aluminum, non-vortec. I run a full roller rocker on them. with a flat-top piston makes roughly 10.1:1 compression. (64cc chambers) 2.02(i), 164(e)

/forums/images/graemlins/thumb.gif
 
I've got the dart heads with extensive time on the flowbench. 2.05 intake valves and I can't remember the exaust valves, but they flow like crazy. The shop that built these said they would flow very close to AFR's. AFR are very nice, but I'm happy with my Dart 2 heads.
 
Make sure of your exhaust options if you decide on angle plug heads. I'm having some fun with that situation right now since not every company makes headers that will fit the angle plug heads.

Smitty
 
Hedman makes a set of headers that will fit a first gen with angle plug heads... /forums/images/graemlins/thumb.gif I have them on right now /forums/images/graemlins/grin.gif
 
World Products. Cheap, work with your stock intake, don't require special rocker arms, etc.

Otherwise, get the AFR and wait. If ya need heads to run temporarily go to the junkyard.
 
no if you read flowbench scores both the e-tecs and the fastburns flow better than vortech heads, I will look at digging up some numbers.
 
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I will look at digging up some numbers.

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This would be great thank you, its a pain in the a$$ trying to figure out the best value since your only doing somthing once ya know!
 
Hmmm.... I never looked at a flow chart I just trusted the GM description of the heads when they said Fastburn were just an aluminum version of the Vortec with heart shaped combustion chambers. And the only person I've ever heard mention the E-tech heads saed they were E-brocs version of the Fastburn.
I didn't read the whole article on those sites did they get thos flow #'s with equal sized valves? I kind of wonder because acording to GM with equal sized valves the Vortecs outflow the Bowtie heads.
 
[ QUOTE ]
For comparison purposes all heads were fitted with 2.02 intake and 1.60 exhaust valves, except the Brodix Track-1, which was delivered with 2.080 intake valves, the Vortec, which had 1.94 intake and 1.50 exhaust valves, and the Fast Burn heads which used 2.00 intake and 1.56 exhaust valves. All flow ratings in CFM. Color red indicates highest flow at that valve lift.




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Maybe 2.02 valved Vortecs would outflow, I'd prefer Fastburns for the whole aluminum aspect.
 
ok the question is, if i went E-Tec's should take the 170s or go to the big dogs at 200, im thinking 170 but when i move to the 383 dont know if ill need the larger heads.
 
What do you want the motor to do? Do you like to wind it up a bit? Looking at your possible cam selection, I would have to say you are wanting more top end power. If this is the case, then I would go with the next bigger version.

If you are looking for more grunt, then a smaller cam and the smaller heads will be the hot ticket....
 
Someone should jump in here and give you an idea on what the smog police will allow in that Nazi state....
 
Then have at it /forums/images/graemlins/thumb.gif /forums/images/graemlins/thumb.gif /forums/images/graemlins/thumb.gif /forums/images/graemlins/thumb.gif
 
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