Vortecs vs. S/R Heads

[crm318]

I have a set of S/R heads on my truck. I was wondering if it is worth going with vortecs. I hear that the vortecs are slightly better, but the S/R are far superior in build quality. I also know about the intake and valvetrain differences. What do yall think?

[stich626]

for what gains you'll (might) see i'd stick with whats on it..
if you're rebuilding and want more mpg and mid torque then vortec, but they are all done at 5500rpm and unless built don't like cams over .480 lift

[oldblue1968chevy]

summit 'vortec' heads take up to .520..

[GASoline71]

Are you talkin' about the World Products S/R Torquers? Good heads.

They are more performance oriented than the Vortec heads.

Gary

[stich626]

Originally Posted by oldblue1968chevy

summit 'vortec' heads take up to .520..

so do any you have machined.. but out the box .480 is it.
trusting summits machine work.. sorry not I

[oldblue1968chevy]

Dart makes them here is the link..

http://www.summitracing.com/parts/SUM-151124/

[turp mcspray]

The vortecs definitely flow better. The heads you have will benefit from some mild pocket porting, and a good valve job. They weren't meant to be a performance head. S/R stands for stock replacement. Not that they are a bad head, but out of the box, the vortecs are pretty hard to beat.

[shortbed70]

Originally Posted by turp mcspray

The vortecs definitely flow better. The heads you have will benefit from some mild pocket porting, and a good valve job. They weren't meant to be a performance head. S/R stands for stock replacement. Not that they are a bad head, but out of the box, the vortecs are pretty hard to beat.

What he said! The Vortec heads I have (patriot 185) flow almost identical to the bowtie heads up to 6000. And they will go 520 lift no problem. Those S/R heads are ok but stock replacements are what they were intended for.
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[crm318]

I would be going with a cam no larger than .460 lift and Keeping the rpms under 5500.

[stich626]

Originally Posted by crm318

I would be going with a cam no larger than .460 lift and Keeping the rpms under 5500.

u'r looking at about a grand to change over to vortec (new parts)
now don't get me wrong I love the vortecs best heads out there from the factory for gen I small blocks..
but in this case ,you more than likely will not see enough of a gain to warrant the grand spent..
with a .460 lift mild cam you're not gonna see enough
what CC are the s/r chambers?? the dart page doesn't list them..
also s/r heads COULD ALSO BE WORLD PRODUCTS

[oldblue1968chevy]

they come in a white box from summit and dart paperwork

[stich626]

Originally Posted by oldblue1968chevy

they come in a white box from summit and dart paperwork

ya your vortecs did, I asked about his s/r heads

[Marv D]

I think were all assuming he's got the World products S/R Torquers. Never heard of any other head other than World Products called the S/R Torquers

http://www.worldcastings.com/product...ron-heads.html

I believe Dick Maskin (Dart) is totally out of that now,, and World is all Bill Michell.

[GASoline71]

Used to get Bill Mitchell stuff through his "Hardcore Parts" catalogs. I have bolted a few sets of the S/R Torquers on SBC's. Pretty good set of heads.

Gary

[crm318]

Yeah. I have world products sr 1.94/1.50 heads. I think that they are the 76cc. The vortecs are on hand. I would only have to pay for gaskets. Do the vortecs use the same length pushrods as the sr?

[veinbar]

Same pushrods can be used. Don't forget the different spark plugs...

[blackedoutharley]

Originally Posted by crm318

I would be going with a cam no larger than .460 lift and Keeping the rpms under 5500.

Then stick with what you have and spend the money elsewhere. The heads you have are fine for what you're describing as far as cam and max rpm.

[ll____b0t____ll]

Assuming you have 9.0 compresion like your sig implys Ide have to disagree with the whole not seeing much switching to Vortec heads.
If the Vortec heads are 64 CC or less that would bring that compresion ratio right up
and perform far better than the 76 CC heads.
Even with a miniscule 460 lift.

[Marv D]

I agree, bringing compression up is generally a nice boost in the motors 'seat of the pants' feel, (b0t and I don't discuss the "T" word LOL, just yankin your chain buddy) so we'll just leave it at 'seat of the pants feel

But there is far far larger issue here (imo) Key being were all assuming crm318 really knows what he has now. The S/R torquers come in 76 or 67cc chambers. Without sounding rude here, I think he's totally guessing on the 9:1 compression he thinks he has now. Or is baseing it on some claim of the previous owner / engine re-builder, or ??????

to that point.....

I think that they are the 76cc

We can't make intelligent choices unless you supply 'real' information to base it on. (and again trying to not sound rude here) but if you don't KNOW EXACTLY what head, piston, deck height, gasket is in the motor, all your doing is guessing and it will do nothing but get you in trouble. You could tear the motor apart and get 'real' information, THEN make an informed decision! Otherwise your better off leaving it alone.

So here is some real information for you to start from....
A pair of World 67cc S/R Torquers, straight out of the box flowed 225cfm @ .60" MEASURED on a Syperflow 600 flow bench.
On the same bench a pair of 64cc '855' Vortecs flowed 239cfm at 0.50"

I don't have measured info on the S/R's at 0.5 but it's apparent that if they peak at .6,, .5 is something less. The Vortecs would be a step UP in flow #, but 14cfm is most likely not anything your going to feel in the seat of your pants.

[ll____b0t____ll]

I agree with Marv D if they are the 67 cc than ide stick with them as the loss or gain is far to little to justify the cost of changing.

However if as he stated he thaught they are 76 cc than stepping down to 64 cc hed notice a very nice bump in his seat.

He may very well be close on his guess of compression, tell me how many people do you know running a flat top piston...just about everyone and his dog is rocking those lol.
A flat top and 76 cc heads is in no way close to my personal idea of how to build HP or TQ.

I could be biased mind you but I have this disorder where when I build a new engine I want to get as much as I can afford out of it power wise.
Keep it on pump gas even if premium.
And last but certainly not least never get passed by some yahoo with a Ford truck and a 460 engine and a 35 foot pair of cb antannas. lol.

Ide rather my truck look like it just crawled out of a junk yard and smoke anything its likely to come across on the street.
Always loved me a sleeper cuz at the end of the quarter mile paint and lowrider gear
and chrome and perfect body work cant explain to your girlfriend why you just got smoked by the towns oldest ugliest truck

[ll____b0t____ll]

P.S Its all good Marv D lol I like good back and forth joking but hey dont make me sick plato and so crates on ya :0

[crm318]

I haven't been able to find any information on S/R heads anywhere on the internet. I have all of the casting numbers though.

[HomerJ]

Originally Posted by crm318

I haven't been able to find any information on S/R heads anywhere on the internet. I have all of the casting numbers though.

http://www.theengineshop.com/product...f_file-221.pdf

This might help you ID the heads. Also, on my Torquers, there is a part number cast into the ends (facing front/back of engine). If yours have the same numbers (mine are 42660's), you can find the part number on Summit to get the chamber size.
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