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516 heads
#560236
12/22/09 08:40 PM
12/22/09 08:40 PM
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Joined: Oct 2009
Posts: 276
Temecula, Ca.
zzyzxpat
OP
enthusiast
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OP
enthusiast
Joined: Oct 2009
Posts: 276
Temecula, Ca.
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I am putting together an original 361, and want to keep it all original. I know that 440s,383s are a better way to go per dollar spent, but I am a little different sometimes. The heads have had 1.74 exhaust valves installed and all new valves. I am going to run a Lunati 60304, .513-.533. The proper springs are there. My question would be on porting. I am going to do it myself and am asking for advise from those who have knowledge in this area. Please don't tell me to change to a different head. This 361 will be stroked to 450 but look completely stock and is going in a numbers car. Thanks in advance.
" The last official act of any goverment, is to loot the treasury" George Washington
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Re: 516 heads
[Re: zzyzxpat]
#560241
12/22/09 11:58 PM
12/22/09 11:58 PM
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Joined: Jul 2008
Posts: 1,075
United States
STLDuster
super stock
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super stock
Joined: Jul 2008
Posts: 1,075
United States
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Not a bad head with the bigger valves and some porting  I love mine!
"No great genius has ever existed without some touch of madness." - Aristotle
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Re: 516 heads
[Re: STLDuster]
#560242
12/23/09 12:08 AM
12/23/09 12:08 AM
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Joined: Jan 2003
Posts: 6,497
N.E. Ohio
KillerBee
master
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master
Joined: Jan 2003
Posts: 6,497
N.E. Ohio
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Quote:
Not a bad head with the bigger valves and some porting
I love mine!
 as long as you don't spend a bunch of $$$ on them.
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Re: 516 heads
[Re: KillerBee]
#560243
12/23/09 01:12 AM
12/23/09 01:12 AM
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Joined: Dec 2003
Posts: 5,314
Carstairs, Alberta, Canada
dave571
master
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master
Joined: Dec 2003
Posts: 5,314
Carstairs, Alberta, Canada
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I don't want to sound like a jerk, but if we are being picky about numbers, isn't a numbers 361 not possible? Only date coded would be possible, since 361's were prior to block vin stamping. That said if it is beleived to be the original motor for the car, does it make any sense to stroke it, and cam it up, and the hope that the block doesn't get a window in it while bagging it? Sorry I couldn't resist asking. Not trying to start a peeing match or anything.  In any case, back to the thread, I think a good port job will work with 516's, and 450" motor. Rpms will be a little more limited than with some of the newer heads since the intake runners are a smaller volume, but should still work. 
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Re: 516 heads
[Re: zzyzxpat]
#560244
12/23/09 08:03 AM
12/23/09 08:03 AM
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Joined: Jan 2003
Posts: 21,063
Niles , Ohio
therocks
oh wait.but hey.lets see.oh yeah.
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oh wait.but hey.lets see.oh yeah.
Joined: Jan 2003
Posts: 21,063
Niles , Ohio
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The ones I had on my 440 had 2.14 and 1/81 stainless valves in them.They had been ported some also.I pullerd over 6500 all the time with them/They are on the kids 413 now.Porting like said you have to be careful.Its not too hard when doing them to hit water.Rocky
Chrysler Firepower
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Re: 516 heads
[Re: therocks]
#560245
12/23/09 09:05 AM
12/23/09 09:05 AM
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Joined: Feb 2003
Posts: 12,675
Columbia, CT
moper
I Live Here
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I Live Here
Joined: Feb 2003
Posts: 12,675
Columbia, CT
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I've made 450/490 on them, a med size hydraulic cam, and pump fuel. But those were not template ported... They went a bit beyond that. I think for the cash the Source heads would be the best fit in terms of cost, effort, sneakiest and most stock appearing head for it. If you want to use the 516s be careful as bigger is not always better and understand there will be power and rpm limits as a result of a long stroke and average at best port design/shape.
Well, art is art, isn't it? Still, on the other hand, water is water! And east is east and west is west and if you take cranberries and stew them like applesauce they taste much more like prunes than rhubarb does. Now, uh... Now you tell me what you know.
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Re: 516 heads
[Re: dave571]
#560246
12/23/09 09:22 AM
12/23/09 09:22 AM
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Joined: Oct 2009
Posts: 276
Temecula, Ca.
zzyzxpat
OP
enthusiast
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OP
enthusiast
Joined: Oct 2009
Posts: 276
Temecula, Ca.
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Quote:
I don't want to sound like a jerk, but if we are being picky about numbers, isn't a numbers 361 not possible?
Only date coded would be possible, since 361's were prior to block vin stamping.
That said if it is beleived to be the original motor for the car, does it make any sense to stroke it, and cam it up, and the hope that the block doesn't get a window in it while bagging it?
Sorry I couldn't resist asking. Not trying to start a peeing match or anything.
In any case, back to the thread, I think a good port job will work with 516's, and 450" motor. Rpms will be a little more limited than with some of the newer heads since the intake runners are a smaller volume, but should still work.
You are right. Just trying to do something a little different. It is a 66 Coronet. No way to verify that it is original ( it is. ) If done right and kept under 5000rpms, I think it will stay together. I have no experience with 516s, so the reason for my question. I have heard about hitting water with these. Thanks for your input. Pat 
" The last official act of any goverment, is to loot the treasury" George Washington
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Re: 516 heads
[Re: StealthWedge67]
#560248
12/23/09 12:05 PM
12/23/09 12:05 PM
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Joined: Oct 2009
Posts: 276
Temecula, Ca.
zzyzxpat
OP
enthusiast
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OP
enthusiast
Joined: Oct 2009
Posts: 276
Temecula, Ca.
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Quote:
I've never heard of a 450" 361 combo. What Crank are we talking about? Without knowing anything about the specifics, my first reaction is that it sounds like a an awful short piston, for a street motor. (???) I don't know that I'd feel good about going this route with a #'s correct block (???). A 3.75 stroke should get you into the 420" neighborhood (just off the top of my head), and would still be a reliable street motor.
My formula was 4.155 bore,4.250 stroke,6.535 rods, with a compression height of 1.320.
Open to suggestions if you think that is not the best for a street motor.
4.250 stroke,6.535 rod,1.320 compression height.
" The last official act of any goverment, is to loot the treasury" George Washington
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Re: 516 heads
[Re: zzyzxpat]
#560249
09/24/13 01:00 PM
09/24/13 01:00 PM
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Joined: Jan 2003
Posts: 16,376
dogdays
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 16,376
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That combo is done all the time with a larger bore, like in a 383 or 400 block, so the compression height shouldn't be an issue. Make sure the connecting rod doesn't run into the end of the bore somewhere around mid-stroke.
I applaud you for going into new waters, 361s are giveaway engines. I actually turned down one several years ago, and my motto is, "A man can't have too many pieces of cast iron aging in his back yard."
Your proposed engine is basically an Olds 455 with a little shorter rod and shorter comp height.
Dwayne Porter, aka Fast68, did a set of 516s as mentioned above. He is a really good source even if you are going to do the work yourself. I don't think he'll worry about the competition!
If I was your tech adviser I'd steer you directly to the Stealth heads. Out of the box they will be worth 100 hp over a home ported set of 516s, and they will have an advantage from idle to redline.
But either way it will honk at low rpm. You'd better buy a set of 2.76s for your 8 3/4!
R.
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Re: 516 heads
[Re: zzyzxpat]
#560251
09/24/13 03:33 PM
09/24/13 03:33 PM
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Joined: Aug 2003
Posts: 43,097
Bend,OR USA
Cab_Burge
I Win
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I Win
Joined: Aug 2003
Posts: 43,097
Bend,OR USA
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Quote:
Quote:
I've never heard of a 450" 361 combo. What Crank are we talking about? Without knowing anything about the specifics, my first reaction is that it sounds like a an awful short piston, for a street motor. (???) I don't know that I'd feel good about going this route with a #'s correct block (???). A 3.75 stroke should get you into the 420" neighborhood (just off the top of my head), and would still be a reliable street motor.
My formula was 4.155 bore,4.250 stroke,6.535 rods, with a compression height of 1.320.
Open to suggestions if you think that is not the best for a street motor.
4.250 stroke,6.535 rod,1.320 compression height.
413 and 361 have the same stock bore, 4.180 I beleive  Not 4.155  
Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
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He runs Max Wedge heads now. 
100 HP??