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73nova350 01-21-2013 04:24 PM

what would be the best heads
 
looking into new set of heads not sure what is best, i have a sbc 350 comp cams 280h cam package 280 advertised duration 480 lift long tube headers edelbrok rpm air gap man edelbrok 600 carb 390 posi rear right now i have the stock iron heads on there except added 194 valves. any suggestion on what heads would be best. looking to go with aluminum

73nova350 01-21-2013 04:25 PM

forgot to add i have a 3000 stall

vinniekq2 01-21-2013 05:57 PM

check out your local suppliers to what is available with 180 ish CC runners.Its up to your budget

cdminter59 01-21-2013 06:16 PM

what would be the best heads
 
These Dart heads are a good deal for the price. Dart SHP Special High Performance Cylinder Heads 127122 - SummitRacing.com. Of course you will have to check out your engine to know which chamber volume to buy. Keep your C.R. at about 9.5:1 -10:1 and you won't have a problem.

ap72 01-21-2013 06:29 PM

if you're going to invest in some good heads get at least a 195cc runner, otherwise just stick with some vortecs.

hcompton 01-21-2013 07:28 PM

Brodix and dart make the best heads if your going by quality and performance edelbrocks performace is not max outed drag racing so they fall short on big power but very good quaility and use good head sizes for the street.

With your cam 195's do sound about right good set of any of the 3 will be better than vortecs and other smaller heads.

Lots of cheap stuff out there brodix and edelbrock both offer a good cheap head.

Now the best will depend on your goals. Most power will invole a lot more than a head swap. With 23 degree heads i would say brodix, dart, edelbrock and world of products is comparable in price and performance. They are all good stuff and offer an advantage over the other guys in some way or another.

What are your hp and rpm goals

73nova350 01-22-2013 06:10 PM

thanks for the advice guys, next question is which cc chamber would be best? is it better to go with a smaller chamber or larger, and i want to go with aluminum heads for the weight reduction but what are the negitives to that?

73nova350 01-22-2013 06:15 PM

was just looking at those heads u posted on here, they look great for the price and it says there assembled will those springs work with my 480 lift cam? and if i have 9.1 compression now what will it be with the new 64 cc chambers? thanks guys

techinspector1 01-22-2013 07:03 PM

Quote:

Originally Posted by 73nova350 (Post 1637769)
was just looking at those heads u posted on here, they look great for the price and it says there assembled will those springs work with my 480 lift cam? and if i have 9.1 compression now what will it be with the new 64 cc chambers? thanks guys

Your cam closes the intake valve at 41 degrees ABDC @0.050" tappet lift. With 9.0:1 static compression ratio, the dynamic compression ratio is 7.66:1 and the motor is a pooch, compared to what it could be if you had matched up components. Do you really have any idea what the exact static compression ratio of the motor is?

73nova350 01-22-2013 11:25 PM

no i do not, suggestions?

lako666 01-23-2013 07:20 AM

Hello guys,i think its totally depend upon your budget that how much is affordable for you..but my point of view 195cc head is the best for you and its affordable easily...are you use any head in the past or first time you are use??

F-BIRD'88 01-23-2013 08:47 AM

Two great value/performance choices.
Brodix IK200
BRODIX Cylinder Heads Over 40 Years of Innovative Cylinder Head Technology

Profiler 176 series "All American" 23 heads (195cc port)
Pro-Filer Performance Products

A lot of bang for the buck with either choice. These are both premimum choices in a as cast port.
CNC and hand porting and custom chamber size options are available on both -call them.

The performance/price valve of a complete ready to rock "out of the box" premium CNC ported bolt in head cannot be
ignored
AFR 195cc Eliminator
Air Flow Research

73nova350 01-23-2013 10:24 AM

first time going for new heads, last year i had the heads i have now (stock gm iron heads) redone and had 194 vavles put in. but i wanna switch to an aluminum head that will let it breath better and bigger valves. not to worried about price as long as its worth it in performance.

ap72 01-23-2013 12:55 PM

Quote:

Originally Posted by 73nova350 (Post 1637933)
first time going for new heads, last year i had the heads i have now (stock gm iron heads) redone and had 194 vavles put in. but i wanna switch to an aluminum head that will let it breath better and bigger valves. not to worried about price as long as its worth it in performance.

If you're not worried about price then call up Speir or Dr. J. You'll get a perfectly tailored head for your application.

oldbogie 01-23-2013 02:49 PM

Quote:

Originally Posted by 73nova350 (Post 1637383)
looking into new set of heads not sure what is best, i have a sbc 350 comp cams 280h cam package 280 advertised duration 480 lift long tube headers edelbrok rpm air gap man edelbrok 600 carb 390 posi rear right now i have the stock iron heads on there except added 194 valves. any suggestion on what heads would be best. looking to go with aluminum

This engine sounds rather missmatched with a long duration low lift cam a small CFM carburetor, Edlebrock Performer RPM intake.

Stock 350 iron heads that you had 1.94 intakes put into, what is this? Unless the heads were off a heavy duty/industrial engine they came with 1.94 intakes. What is the head casting number?

In selecting the chamber volume for new heads you need to understand the pistons you have. Most pistons have a circular dish, these are not very good for performance nor efficiency regardless of the head used. Other choices that can be there are D dish, flat top, or dome but these don't typically show up in OEM motors so unless this has had some custom bottom end work it's not likely to have these kinds of pistons. So far as pistons go in the 350 flat tops or D dishes work the best and are generally seen with a small chambered head say 58 to 64 ccs. Chambers are best when shaped and generally proportioned around the characteristics of the L31 Vortec. there are aftermarket large chamber heads that use much of the L31 technology but these are really for blower motors or big inch small blocks, not that they couldn't be used in a 350 with domed pistons. Another critical item is the thickness of the head gasket and the clearance distance between the piston crown to the block's deck. These two things control the squish/quench clearance where in combination you want to hit about .040 inch. With a small chambered aluminum head with an unmilled deck, where you can get into trouble is with a thick gasket often specified with an aluminum head, in tis case with a .025 inch deck clearance and a .053 gasket you can end up with a .078 clearance which greatly reduces the effecctivness of squish quench. So you've got to keep an eye on these dimensions and look out for a thin head gasket that is also compatible with the aluminum head. The issue here is that the aluminum head expands and contracts more than either the iron block or steel gasket, so it rubs on the gasket which wears grooves into the softer aluminum. The best and longest lived gasket needs to be made to accomodate this, multi-layerd steel, graphite faces, and composition build ups are used and have different thicknesses, a simple steel shim would become a problem in street or mixed street strip service with the aluminum and iron sandwich. You can get away with a steel sim in this type build up for race only where the heads are just considered an expense item to get into the winners circle, which means it works, but not forever. A zero decked block is probably easier to work from for the street ot street/strip as it allows a thicker mulitlayer or composition gasket to be used which is easier on the head's mounting face so the sealing and the head lasts a long time.

As you can see there are a bunch of things to keep track of all the while realizing there's more than one way to skin this cat.

Bogie


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