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Vortec heads, without the vortec look? *Found them*

Interesting. I've been looking into heads for my EFI 347 build which will be about 9.3:1 depending on how much the block needs to be decked. Most of what I've seen is that would be pushing it for that compression ratio and iron heads, even with 91 octane. Would be nice to run iron heads though.
 
I'm running Vortecs (64CC) with flat top pistons with stock deck height, which SHOULD come up to around 9.6:1. No, I didn't CC the heads, check deck height, or run the right head gasket, but I run 87. If timing/fueling is off it pings like nobodies business. If they are right, it never pings.

No idea where people have come up with these really low compression ratios and high octane gas requirements, it's more prevalent than I thought, as I know racers who are lucky to be making 9:1 yet run 100+ octane gas. I have a feeling it has much more to do with people not getting timing and fueling right, and much less to do with the compression.

As a for instance, my econobox is 10:1, iron heads, and runs on 87. No fancy direct injection either.
 
THe only thing im concerned about (which could probably be answered with a phone call) is this situation.

vortech_head_w_old_intake.jpg
 
That is simply the mismatch of the Vortec port with all earlier intakes. You can tell those are Vortec heads that have been drilled for the earlier intake by the four bolts at that corner, plus the one in the center. Whoops lol

If the heads have the old bolt pattern, they should (no reason not to) line up with the old pattern intakes. And a Vortec designed intake will line up with Vortec ports.

The port-mismatch has been known for a LONG time, I doubt any manufacturer would make that sort of mistake.
 
I would hope so. The more i think about this motor build, the funner it sounds! I think it would just be the perfect motor for me! Seems like the best combo of parts for the crossroads between stock/performance.
 
Should be!

I don't see where those EQ heads would be bad compared to the Vortecs, especially since you want them to look "stock" for that vintage. The valve covers will do most of that for you. :)

We've got way better engine builders than myself on here, but with .025" deck height (which is normal, stock), and a .015" head gasket, quench will be perfect.

When are you going to start the build? Make sure to CC the heads, some heads are dead on the rated CC, others are a ways off. That, gasket thickness, deck height, valve relief volume (on pistons), and you will know for sure static compression.
 
Ebay add with good info,

http://www.ebay.com/itm/VORTEC-HYBR...ies&vxp=mtr&hash=item20b3b8d060#ht_2040wt_883


VORTEC HYBRID BARE CYLINDER HEAD WITH HEAT RISER

EngineQuest Makes Big Waves in Marine Market Introduces New Vortec Hybrid Head with Heat Riser
Based off EQ cylinder head that was featured in the popular
“Budget Sledgehammer” build in Popular Hot Rodding magazine

EngineQuest a leading supplier of stock and performance cylinder heads and engine components, is taking the marine market by storm with its new Vortec Hybrid head with a heat riser. This newly designed cast iron marine and stock replacement head will work on any small block Chevy application and is the only head of its kind on the market.

Since a major part of the marine market uses automotive-based engines, our new Vortec Hybrid head provides machine shops and engine rebuilders with an affordable alternative for rebuilding these engines to get increased airflow and horsepower

This cylinder head is based on the EQ Vortec cylinder head (EQ-CH350C) that was featured in the popular “Budget Sledgehammer” build in Popular Hot Rodding magazine which produced 447 HP for under $3,500.

EQ Part CH350H is available in the ’69-’85 intake bolt pattern with perimeter valve cover mounting holes. These heads feature 64cc combustion chambers, 176cc intake runners capable of excellent flow and velocity, standard 1.94 in. diameter intake valves and 1.50 in. exhaust valves. The intake port opening for the EQ-CH350H is designed like the 68-95 intake ports to provide easier port and gasket matching.

These Vortec Hybrid heads are Australian manufactured and feature a thicker .4375 deck for greater strength, and hardened DuraBond exhaust seats for improved durability. The CH350H should be used in pairs when replacing OE heads (083, 191, 193, 217 and 810 castings) and are available bare. To ensure the highest quality, EQ conducts a 25-point quality inspection on every new cylinder head shipped.

***Price is per head***
WE DO NOT SHIP TO P.O. BOX, PR, AK, HI, VI OR APO'S
Click to expand...
 
Engine quest catalog,

http://www.aamidwest.com/enginequest/eq-catalog/

Says,

CH350G 5.7 350 083, 191, 193, 217, 810 1.940” 1.500” 1.9752.005” 2.0152.045”
VORTEC HEAD WITH HEAT RISER / 8795 INTAKE BOLT PATTERNS
UNIVERSAL MARINE/AUTO CAN BE USED AS REPLACEMENT IN PAIRS ONLY

CH350H 5.7 350 083, 191, 193, 217, 810 1.940” 1.500” 1.9752.005” 2.0152.045”
VORTEC HEAD WITH HEAT RISER / 6986 INTAKE BOLT PATTERNS
UNIVERSAL MARINE/AUTO CAN BE USED AS REPLACEMENT IN PAIRS ONLY 1.940” 1.500” 1.9752.005” 2.0152.045”
OUTER PERIMETER VALVE COVER MOUNTING HOLE 1.940” 1.500” 1.9752.005” 2.0152.045”
Click to expand...

So the TBI boys could run the CH350G with no mods! (other than a tune)
 
So am I understanding this right, the hybrid heads allow you to use a regular manifold with egr?
 
Its been a long time sense ive read up on vortecs. Do you have to use an egr? They don't do visual inspection here
 
The pros and cons of EGR are out there. Most say that a properly functioning EGR system will give you a better running, mor economical motor than the same motor without EGR. Myself personally, I would just rather not have it. But i do believe its a good idea to have the exhaust crossover in carbed applications.
 
Well I'll be watching where this goes cause I like this idea and think it would also work well in my burb for its first phase of development...
 
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