anyone ever use these with the 2.02/1.6 valves? I want to use these on my 350 if I can find some. about how much do they run?

 

You have to realize that these heads are "nominaly" 58cc
They come with 1.94 x1.50 valves.
If you wanted to install 2.02's the chamber walls closest to the valve must be relieved a little to fit the valve.
This relieveing (deshrouding) will increase the chamber size to about 61-64cc approx.
So you'd have to get the heads milled to restore them back to 58cc.

Just get a set of 2.02x 1.60 SR Torques or SportsmanII's and mill them to the chamber size you want . Less cost, less work, same result.
What is the finished size you're looking for?

 

their website said that the 2.02 were available in 58cc

I probably misunderstood the site it said with oem combustion chambers they were available with 58cc

just the plain s/r's with 58cc chambers were available with 1.94 vs 1.5 valves. I don't think that would flow much better than 416 castings would it? I was wanting something with a little bigger exhaust. I wish I could find some flow numbers on these heads

 

You have to realise that these are a "SR head" stock replacement head. meaning they are functionally the same as a stock head. They don;t flow any better than a stock 305 head with equal valve size. (1.94x 1.50)
A 305 head like the 416 or 081 can be improved a lot with larger valves (1.94x 1.60) and *hand porting*. So can a "SR" head. The result is the same essentually. The benefit of the SR head is you're starting with a new cylinder head.
you can achieve the flow and performacne with either a modified, rebuilt 305 head or a new, ported "SR Torquer" head.
But you'll have to do the porting yourself.

If you really want to buy a new hi performance head you will be further ahead to buy a hi perf head with improved ports and large valves to start with.

A "iron lighting", "iron eagle" 180cc cast head or a vortec 062 L-31 head is probabily what you want. either these heads can be milled to 58cc if you got to have 58cc.
You can get 1/2 more cr ratio using thin steel shim head gaskets on a 350 probabily making 64cc head ok without milling. A shim gasket is 4.5cc. a typical .039"/.041 Felpro is 8.9 to 9.1cc

What size intake port are you after ( cc) ? How much flow?
Do you want to port a head for better flow or buy one that is ready to rock out of the box?

23deg iron lighting 180cc heads

Dart Iron Eagle 180cc heads

 

I'd like to buy one ready out of the box. I hear good things about vortecs but I think they limit my intake choice so I'd rather have something prior to 87. Didn't the 416's have 1.84 intakes? I may look for a pair of 416's and clean them up and have larger valves put in. I've been thinking about this for awhile. and will probably be awhile before I do this. I lucked out and found a garage I can rent so I won't have to do this on the side of the street. I just ask around and keep an eye on ebay.

 

and buying a set and having them milled down isn't really an option. There's no machine shops around here that I would want to touch anything concerning my car. Closest one is in Dayton maybe, but don't want to drive 50 miles for machine work.

 

yes 305 heads have 1.84" valves.

There are many many intake manifolds available for vortec heads now. All are reasonably priced.
Performer
Performer RPM (air gap)
Cyclone
Crosswind ( rpm air gap)
Super Vic vortec
Hurricane single plane
Edelbrock low rise dual quad
Edelbrock hi rise RPM dual quad
GM dual plane
GM eliminator
GM hi rise ( rpm)
Holley action plus/ stealth vortec.
Holley EFI single plane
Holley HSR EFI
GM Ramjet EFI
Edelbrock EFI
TPI vortec base
Holley/Weiand 142 supercharger (vortec)
GM TBI vortec
Edelbrock Vic 2bbl
Did I miss any? i think the only manifold type that is not available in a Vortec form is a tunnel ram.

The I can't get an intake manifold excuse doesn't cut it.
THe cost of getting a matching vortec ctyle manifold is well worth it. You're going to buy a manifold anyways. I run a CrossWind ( rpm clone) manifold. Cost is way way under $200. You can even buy a good/used vortec manifold.

Why do you have to have a 58cc combustion chamber?

You're in OHIO, Pick up the phone and get Jeg's to ship (Fedex ground or UPS standard) you a set of hi performance cylinder heads and bolt them on.
I recomend the Dart 180's or Vortecs.

I found 4 Machine shops in Greenville. took my 2 minutes.
I'm in Canada. What's your excuse....

machine shops in Greenville

If a SB chev head is 64cc and you want 58cc you have to mill of about .038/.040". (approx) Usually no intake milling or intake face head milling is nessessay.

 

Take a look on ebay too.

http://cgi.ebay.com/ebaymotors/Vorte...spagenameZWDVW

 

I didn't realize there were that many intakes for vortecs. so I may just do that, but as far as machine shops in greenville let's see. Stan Ray and Son's AKA Ohio crankshaft. Discussed that in an earlier thread no thanks. I believe Markwith is only industrial machining. DA Fitzgerald and Darke Precision Inc I've never even heard of. I'll check them out. Francis and Son Automotive Machine Shop is a dump. It looks like a barn. I think my friend took his wife's head in there off of her dodge shadow and it cost almost $300 to have it reconditioned and I thought that seemed awfully high.

 

I'll ask around about the two machine shops that I never heard of and see if anyone has done business with them even if they're still in business. I was really wanting to use a performer RPM but not an air gap. I'll read about the super vic and the cyclone. I'm not running efi or dual quad, and I think the GM's intakes are over priced.

 

Instead of asking 20 people just phone the shop(s) up and ask how much to do the maching you want done.

I just got back from Toronto (70 Miles away from me ). Picked up a nice Performer RPM and a Accel HEI coil for $100Can.
Future enigne project.
If I can do it, so can you.

ill bet there are 50 machine shops within 50miles of your location that can take care of your machineing for a reasonable $$$.

www.racingjunk.com
www.rpmclassifieds.com
Your local "Autotrader" mag.
www.ebay.com
www.professional-products.com

 

What are your overall plans for this engine and whats the rest of the setup you're looking at?

I'd be willing to bet you'd be wayyyy happier with a set of Vortecs, either pre-modded to accept a aggressive cam or factory stock with a slightly aggressive cam to work with them as is than with some set of 305 heads or crappy S/R heads.

I had stock Vortecs with a Perf RPM intake to match and a CompCams XE262 cam in my 87Z and it ran excellent IMO. Would have eaten my stock LT1 94Z I got to replace that car no doubts about it. In fact I'm fairly sure my LT1 with headers/gutted cat/catback, cold air intake etc would still get it *** kicked by that Vortec 350...

 

I already have an edelbrock 1405, holley street dominator, comp magnum 270 h-10, cheap flowtech headers (which actually don't leak) and true duals. I was reading on a website that vortecs were good to about 400 h.p. out of the box. I'm wanting around 350 hp.