small block heads, 4027596 casting # any good??

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74scamp360

74scamp360

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Hey guys i'm looking for some advice on heads for a small block. I'm putting a 360 in my scamp come spring and am wondering about these heads. They are casting # 4027596. I did a little reaserch and from what i was able to find they are hp. 360 heads, came on cop cars, trucks vans etc. Is that correct? I'm a young guy (17) and am looking to get all i can out of this motor but money is super tight. I've been working on a trade for my /6 stuff to a guy and he had these heads he wanted to trade. I know that j heads are really the best thing to get a hold of but really i don't have the money that most people want for them. I guess what i'm asking is are these heads worth doing anything with? I'd love to try and get a nice port and polish on them and bigger valves, somewhere in the area of 2.02/1.60's, you guys know the deal. Let me know what you think. Thanks in advance!!
 
This is what they can do according to Hughes Engines:
Stealth-ported" S/B oval track heads '596' casting number OEM valves 1.88-1.60

Stealth Valves 2.02-1.60



OEM Stealth CFM OEM Stealth CFM
INT INT Change Exh Exh Change
.100" 66 71 +5 51 80 +29
.200" 89 144 +55 103 124 +21
.300" 136 192 +56 131 149 +18
.350" 176 211 +35 136 156 +20
.400" 184 226 +42 140 160 +20
.450" 186 231 +45 142 168 +26
.500" 184 223 +39 141 168 +27
.550" 183 218 +35 142 168 +26


Note: These flow figures are representative of improvements
that can be made with stealth porting on LA heads.
Actual flow will vary with different casting numbers.
 
While the X head is the most sought after head for factory iron, in general, all small block heads flow about the same and will port out very similar to each other. I would not sweat what you have, there a good head.

Do note that the stealth porting above is designed to "Legally Cheat" and stepping up in a port job will bring better and bigger numbers over a broad area.

I would certainly use those heads. I seriously do not see a problem in having them ported and out flowing Edelbrock heads for less.
 
The last set of 596s I ported for a buddy with 2.02/1.6s flowed 252i and 195e @.500 so they can flow.
 
WOW! Nice. I guess I now know mine can do that....later......when I find money....LOL!
 
rumblefish360 said:
While the X head is the most sought after head for factory iron, in general, all small block heads flow about the same and will port out very similar to each other. I would not sweat what you have, there a good head...
Click to expand...
not so fast.

a stock X-head will flow about 220cfm @ .500" to .550"
a typical stock 360 head will flow about 180cfm @ .450" lift.
273/318 stock heads are way worse yet.
(FLOWED @ 28"Hg)

thats a big difference right there.
 
the 596s are a good late model 360 head - put a 2.00 intake (cutback 2.02)and a 1.60 exh valve with a bowl hog and blend and some cleanup of the runners - they will work better than any J or X.
 
lead69 said:
The last set of 596s I ported for a buddy with 2.02/1.6s flowed 252i and 195e @.500 so they can flow.
Click to expand...
I don't have the flow numbers but I changed from my home ported 596s to Eddy magnums which also upped the compression 1.5points and gained nothing at the track - except a lighter wallet.
There a good head.
 
A-BOMB360 said:
not so fast.

a stock X-head will flow about 220cfm @ .500" to .550"
a typical stock 360 head will flow about 180cfm @ .450" lift.
273/318 stock heads are way worse yet.
(FLOWED @ 28"Hg)

thats a big difference right there.
Click to expand...

Looks like the extremes of the tables on flow numbers I've seen. More or less, about the same, lets keep splitting hairs for fun!

So far, of the comparo you list, the X head has a 2.02 and the other a 1.88.
Why did you stop at .450? They will flow more past that point.
Also, what is typical?

Now, on to the OE posters issue.
I guess what i'm asking is are these heads worth doing anything with? I'd love to try and get a nice port and polish on them and bigger valves, somewhere in the area of 2.02/1.60's, you guys know the deal.
Click to expand...

So by means of your post, one could possibly say your suggesting not to port the heads he has in favor of spending yet more money on X heads?

Or did this sentence escape you?
I'm a young guy (17) and am looking to get all i can out of this motor but money is super tight.
Click to expand...

Considering the possible work that lays ahead for this young fella, the casting of the head is not a great big deal when the head will be ported. At that time, when your laying your money down, your speaking to the head porter asking for similar flow numbers or better than the Edel. head and it should not cost you an arm and a leg to get done.

At 17, I think he's income can taxed very well very quickly and saving him $200 on a set of head is a good thing.

Of course, we could all get togther and (Cyber) spend his money into a blown HEMI.
 
rumblefish360 said:
Looks like the extremes of the tables on flow numbers I've seen. More or less, about the same, lets keep splitting hairs for fun!

So far, of the comparo you list, the X head has a 2.02 and the other a 1.88.
Why did you stop at .450? They will flow more past that point.
Also, what is typical?
Click to expand...
flow to .450" becouse thats when the #'s nose over. X-heads flow right to .550" typical would be anyother LA head.
 
Well, I can say I have seen X's flow to 200 cfm and nose over and smoggers flow well to 500.

But hey, I'm not flowing heads and typical, what a word, anyother head?

Oh boy, I just don't know what to say.

I'm just tryin to help the kid out and save a few bucks on head he really don't need. The ones he has now will port out quite nice.
 
A-BOMB360 said:
not so fast.

a stock X-head will flow about 220cfm @ .500" to .550"
a typical stock 360 head will flow about 180cfm @ .450" lift.
273/318 stock heads are way worse yet.
(FLOWED @ 28"Hg)

thats a big difference right there.
Click to expand...

man...

I have a flow sheet from my old heads with 1.88 valves that flowed 189cfm 25 inches of depression, so less depression than your #'s from old stan weiss sheets which means they flow more than that at 28 depression don't they?

I also have a sheet from J&J machine that shows a stock valve 3 angled VJ that flows 199-205 and falls off after .500, some even fell off just after .450 lift. If you put a better multi angled VJ to'em then you'd get bigger [stan weiss] #'s.

Now what?

Are we argue and race flow benches/sheets?

I don't see anything wrong with what Rumble said, it's the average/Idea thats important to the question, right?
 
rumblefish360 said:
Well, I can say I have seen X's flow to 200 cfm and nose over and smoggers flow well to 500.

But hey, I'm not flowing heads and typical, what a word, anyother head?

Oh boy, I just don't know what to say.

I'm just tryin to help the kid out and save a few bucks on head he really don't need. The ones he has now will port out quite nice.
Click to expand...
i think you miss understood what i said. or i sured have made myself more clear(?).
yes the ones he has will do just fine. i agree. no doubt about it.
 
OH, I'm not here to split hairs and argue. I thought you were for a second, but I see not. Generally, I agree the X head is a better head for many applications up to and including porting, but at the OE posters level, why spend the money on what he allready has will do very well.

Your posting isn't exactly a apples to apples.

I'm done here. The kid has alot to chew on.
 
lol thanks guys for all the advice. The big thing with this is it would be easy for me to get the 596's because they'll be in a trade for my /6 stuff. Like i said before i definatly don't have the money to go out and buy a nice set of aftermarkets, and thanks for not suggestiing it, i've noticed that some people don't care what you say, they just keep insisting that you should be buying aftermarket ones. If i do end up getting these heads what do you guys reccomend on mods for these heads (trying to keep in mind the budget). I'm just thinking maybe leave valve sizes alone and focus more on porting and polishing etc etc? I'm asking you guys because i know you've all gone through this before and i still have much to learn. My dad is a great help but he's a big block guy, he didn't even know about externally balanced motors lol. Thanks again guys, much appretiated
 
74scamp360 said:
lol thanks guys for all the advice. The big thing with this is it would be easy for me to get the 596's because they'll be in a trade for my /6 stuff. Like i said before i definatly don't have the money to go out and buy a nice set of aftermarkets, and thanks for not suggestiing it, i've noticed that some people don't care what you say, they just keep insisting that you should be buying aftermarket ones. If i do end up getting these heads what do you guys reccomend on mods for these heads (trying to keep in mind the budget). I'm just thinking maybe leave valve sizes alone and focus more on porting and polishing etc etc? I'm asking you guys because i know you've all gone through this before and i still have much to learn. My dad is a great help but he's a big block guy, he didn't even know about externally balanced motors lol. Thanks again guys, much appretiated
Click to expand...



Well, I would get a nice set of ferrea valves, bronze guide liners, hardened seats on the exhaust and some viton positive seals to go with the cutting down and machining the guides to .500, do some porting , then cc and mill/correct if necessary to the desired chamber volume.

Intake port-Finding the peak [tallest part/beginning of the short turn] and just roll it around towards the seat but don't touch the VJ angles.
The push rod pinch should to be ground out straight and the rest of the wall blended into the bowl. the roof and guide boss kink can be ground higher and more smoothly turn down into the bowl. The guides can be skinny'd up quite a bit, keep the guide long with an edge at the beginning then rolled/roundish the last 3rd towards the V stem.


The exhaust guide can be ground out completely and the kink can be straightened out a bit too, feel through the freeze plug hole on each end port to gauge with your fingers, you can take around .080 out. Then short turn just wants to roll a hair off the seat then straight up and slightly rolled at the top. Polish the crap out of the exhaust port.

Just some advice.
have fun
 
I have 596 casstings - ported , 2.02 nailhead backcut valve, without going crazy - they flow:

:
300/170
350/195
400/219
450/231
500/240
.550/243
 
If it were me, I'd spend the cash to get a quality performance (5 angle) valve job and replace what needs replacing. Dont sweat porting at all. With the same prep, alls casting large port LA heads start around the same place... 215-225 cfm on the intake side. You eat up a lot of cash quickly on porting, and if the guy doing it isnt really good, a lot of that cash is just wasted. The first few hundred make the most difference.
 
1wild&crazyguy said:
Well, I would get a nice set of ferrea valves, bronze guide liners, hardened seats on the exhaust and some viton positive seals to go with the cutting down and machining the guides to .500, do some porting , then cc and mill/correct if necessary to the desired chamber volume.

Intake port-Finding the peak [tallest part/beginning of the short turn] and just roll it around towards the seat but don't touch the VJ angles.
The push rod pinch should to be ground out straight and the rest of the wall blended into the bowl. the roof and guide boss kink can be ground higher and more smoothly turn down into the bowl. The guides can be skinny'd up quite a bit, keep the guide long with an edge at the beginning then rolled/roundish the last 3rd towards the V stem.


The exhaust guide can be ground out completely and the kink can be straightened out a bit too, feel through the freeze plug hole on each end port to gauge with your fingers, you can take around .080 out. Then short turn just wants to roll a hair off the seat then straight up and slightly rolled at the top. Polish the crap out of the exhaust port.

Just some advice.
have fun
Click to expand...
ALL THAT vs the cost of some RHS heads? now thats some funny **** you posted right there. ferrea valves? well god-all-mighty i woulda thought for sure you'd tell him to stick some chevy valves in it. remember? thinner, cheaper, kinda like your.. well nevermind.
now IF you wanna bench race some flow benches.. SURE.. no problem.. OH WAIT WHAT WAS THAT you said about dynos.. yes thats right. flowbenches like dynos, mean squawt. just tools. the 1/4 mile is the REAL flowbench. i'll put money on the X-HEADS making way more power (under the curve/peak/whatev) then the 596's EVER would (to the OP.. 596's are still a good head.. no worries).
WANT SOME SCRAMBLED EGGS WITH THAT HAM I JUST SERVED YOU?


anyways his heads (cause he's strapped for $$ like me)

~ check the valves. if there still good.. reuse them
~ get the machinest to do a typical performance 3 angle valve job
~ bronze guides
~ deck the head to true them up. mabey .010"
~ if you feel up for the challenge, a little pocket porting and port matching
------->>>>PORTING 101

BUT BEFORE AND FOREMOST.. get an estimated first with the worst case senario in mind. IE: replacing VALVESPRINGS/LOCKS/RETAINERS/VALVES/etc. then compare that to the price of say some assembled RHS LA heads. and if you have to.. save your beans so you can afford them. not saying you have too.. just an option.. i'm not a mechanic.. i just play one on the INTERNET.
 
Long winded and short on substance.

You have more insults in your post than good advice and even the advice is well.... my beer can could tell me this, probably more, but you gotta watch out cause he's a joker...

btw sensuous, you can cook for me anytime, and sensuous up... you can get me another beer too.

you ruin every post you type in, good job!

And you must be friends with a certain member here if not the same person.

Thanks for investing your time into lil old me [again], but my fan club is more than full already.
 
Hey 360, take it easy with the foul words and head beatings. You and W$Cguy like to go at it with zest. And while I support the debates and point of view, I think this has to relax a tad.
 
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