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Old 09-07-2007, 07:54 AM
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Heads: GMP Vortec or Word Products S/R Torquer?

I've read good things about both as upgrades to my stock 350. Anybody have experience or know some pro's or con's comparing the two? I'll need a new intake for the Vortec's, could I use a regular dual plane Performer on the Torquer's? This 350 will be a street setup when I'm done, so I'd like to assume all other things are equal. Thanks!

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Old 09-07-2007, 09:58 AM
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Quote:
Originally Posted by Cousin_Joe
I've read good things about both as upgrades to my stock 350. Anybody have experience or know some pro's or con's comparing the two? I'll need a new intake for the Vortec's, could I use a regular dual plane Performer on the Torquer's? This 350 will be a street setup when I'm done, so I'd like to assume all other things are equal. Thanks!
You can specify the intake bolt pattern with the Torquer so you can use your intake if it will cover the ports. One problem with these Vortec type heads is that the intake port is raised up and some intake manifolds will not cover the port, so call the vendor and make sure. Then proceed with careful installation to visually verify you have a good fit.

It's hard to speak in absolutes as every manufacturer of these parts, including GM, makes running changes to the product without changing the part number, so you can get a new head that won't fit an older manifold even though you've been assured by the manufacturer or hot rod shop that they do.

So before you start banging on things make sure you've got a fit, otherwise the seller may not take stuff back after you've modified it and then found out it doesn't fit through no fault of what you did.

Bogie
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Old 09-07-2007, 10:42 AM
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Here are 108 dyno-proven Chevy engine builds. Surf through and compare builds with different heads. Try to compare them with roughly the same cam and intake.
http://www.ryanscarpage.50megs.com/combos1.html
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Old 09-07-2007, 10:49 AM
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Quote:
Originally Posted by Cousin_Joe
I've read good things about both as upgrades to my stock 350. Anybody have experience or know some pro's or con's comparing the two? I'll need a new intake for the Vortec's, could I use a regular dual plane Performer on the Torquer's? This 350 will be a street setup when I'm done, so I'd like to assume all other things are equal. Thanks!
There is no question that you want to run the Vortec head if you want to make more power. Much better choice.
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Old 09-07-2007, 10:54 AM
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Are there different GM Vortec heads (part numbers) for a 350?
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Old 09-07-2007, 11:07 AM
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Go into gmperformanceparts.com There are a variety of Vortec heads but the standard replacement head is 12558060. The bare head is 12529093.

The other Vortec heads are part of the Bowtie series, bigger ports.
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Old 09-07-2007, 11:21 AM
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I was surfin' and ran across these new part numbers for Vortecs. These are different castings from the original 12558060 castings.

DESCRIPTION: HEAD: #25534421
Small port Vortec bowtie head assembly
Completely assembled, ready to bolt on
185 cc intake port
65 cc exhaust port
Uses Fel-pro #1470 exhaust gasket
Bare head P/N 25534351 available separately

DESCRIPTION: HEAD: #25534431
Large port Vortec bowtie head assembly
Completely assembled, ready to bolt-on
215 cc intake port
84 cc exhaust port
Uses Fel-pro #1470 exhaust gasket, may require minor trimming
Bare head P/N 255334371 available separately

Assembled using these part numbers:
25534407 intake valves
25534408 exhaust valves
12551483 valve springs
12552126 3/8" rocker studs
10212808 valve spring retainers
10212810 valve stem seals
12564852 valve locks.

The 12558060 off-the-shelf heads and the ones you'll find in boneyards under 062 or 906 casting numbers have 170 cc intake runners.
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Old 09-07-2007, 11:27 AM
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Sorry for the hijack!!
So is the 12558060 the best GM head, and who has the best price?
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Old 09-07-2007, 11:36 AM
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I haven't seen flow numbers on the newer heads I referenced, but flow numbers on the 12558060 show that up to the point where they were first produced and used (1996 5700 Vortec truck motor), they were the best flowing cast iron heads ever produced by Chevrolet.
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Old 09-07-2007, 11:39 AM
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Quote:
Originally Posted by solidaxel
Sorry for the hijack!!
So is the 12558060 the best GM head, and who has the best price?
I saw the Vortec's in Jeg's for 280/ea and the Torquer's were like 400/ea. I'm thinking the Vortec's win in a bang for the buck situation.
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Old 09-07-2007, 11:47 AM
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Yes they do, but as I read it you will need a whole bunch of other parts$$, so the total for a valve job is getting up there!!
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Old 09-07-2007, 11:52 AM
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I'd be cautious about the lift capability figures published by Jegs on those heads. They say 0.475", but Chevrolet says 0.450" without modifications. Scoggin-Dickey sells Vortecs in several different configurations, modified by them for additional lift.
www.sdpc.com
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Old 09-07-2007, 12:39 PM
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So whats the best bet for a young guy on a budget? Maybe we could say the best setup for less than $1000 and best for over $1000? Everything should be a step up for my stock 350.
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Old 09-07-2007, 12:45 PM
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.............. O K, how about an old guy on a budget with his first new truck 78 Chevy that needs a valve job!!!!
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Old 09-07-2007, 12:54 PM
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Quote:
Originally Posted by Cousin_Joe
So whats the best bet for a young guy on a budget? Maybe we could say the best setup for less than $1000 and best for over $1000? Everything should be a step up for my stock 350.
Did I miss what 350 this is and what is it in?

Knowing where you're starting from helps in the part selection. Add to that what the engine has to move (ie the vehicle), also transmission type and rear gears ratio, tire size if this is getting into a 4x4 with mudders to where you're getting a ways from normal tire diameters as that affects overall gear ratio, and how you intend to use the vehicle, plowing winter snow will be a different proposition than racing on PINKs.

Living in Michigan and commuting with this will net a different recommendation than living in San Diego because of the weather. Vortecs for example don't have an exhaust heat crossover, if you're commuting thru the Michigan winter this won't add to your happiness.

Bogie
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