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Old 10-22-2002, 08:37 AM
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Lightbulb camel hump casting numbers

I got these for $150, are they worth it? 3782461 1964. 62 cc, 2.02 intake, 1.60 exhaust. They come off of a 327. What I want to know is the horse power rating and the compression rating( if there is one!)The description says unique chamber and great performer. How about some insight from the experienced? Will these be good for a HP street cruisin' chevelle? I dont plan on taking it to the track, but I would like a nasty cruiser.

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Old 10-22-2002, 09:57 AM
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Great street heads. I have a set on a 400 that are bowl ported and they work great. The runners are good for the street because they are not so large as to kill port velocity. This often happens on aftermarket heads in low rpm which hurts low end torque needed on the street. There is nothing special about he chambers at all. they are just small.

The factory 325 to 375 HP 327's came with these heads I believe, but someone who knows for sure can chime in and correct me.

This said, I would check into the shape of the heads before building them for use. The set I had cost over $600 in machine work to have them done up correctly. I did the porting myself. You can get a set of GM Fastburn or SR Torquers for a little more and have a little better head. If they have already had exhaust seats installed and just need cleaning up, go for it. If they need surfacing, guided, seats, valves, springs etc., I would just sell them and buy some new ones.

chris
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Old 10-22-2002, 11:27 AM
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Cicle track guys would love to pay you up to 300 a pair for them. they do thier own work to them so they are willing to pay higher prices than already conditoined heads that cost 400 or more. Some classes govern the use of heads to stock variety so there becoming hard to find on the cheap. if you decide to sell private e- mail me and we'l discuss them.
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Old 10-22-2002, 03:20 PM
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your heads are going to need valve guides and exh valve inserts to be run on the street plus they will probably need to be milled flat and replace the valves the springs retainers and locks, i see this all the time, these are old heads usually with lots of miles. what about modern acessories? those heads have no mounting holes or bosses to drill the holes in. if the studs are worn and need to be replaced your in over your head already. I tell all the inexperienced people that come into my shop to buy some darts,SR's or other aftermarket heads, they make thirty or more horsepower extra right out of the box for less money, i like to get that kind of work and will do it if they still want it done but you still have an old pair of heads after sinking lots of hard earned cash into them.
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Old 10-22-2002, 03:33 PM
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I'll quote from my SB "Bible".... "the chamber shapes found on the 461 and 461X heads are nopt the same as found on the 291, 462, ir 186 heads." (all are camel hump heads)... " The 461X castings are popular for racers because they actually had slightly larger port volumes than the 461 and other production heads.". If they are good heads, you probably will like them.
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Old 10-22-2002, 06:42 PM
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The combustion chamber in the 461 head, unlike the other double hump heads, had a very low positioned spark plug hole, and no relief in the quench area. The 461 heads will work good with flat top pistons,but due to the low plug position, they don't like piston domes, as flame propagation is impeded by the dome.
The small, compact combustion chamber of all of the old double hump heads is worth 20 horsepower over a comparable open chamber design.
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Old 10-22-2002, 09:19 PM
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Pretty much as long as they don't need seats replaced I'd use them.Just add lead addative in your gas thats all.
NAIRB is right about the 461 plug position.With dome pistons I've seen the electrodes close on the plugs.
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Old 10-23-2002, 03:24 AM
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461 heads are good heads they came on 325 and 350 hp 327's. they came with 1.94 and 2.02 valves. have 175 cc intakes and 62cc chambers.
i have a set of 461 and 462 2.02 heads, tried both on a motor with 10cc domed pistons and the 461 made 10 more hp. both were non ported heads with only a valve job. they even have the stock seats and havent worn a bit.
if your not driving the car much new seats wont be neccesary. just use a lead substitute.

and if theose circle track guys are looking , im selling both sets.
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Old 08-23-2005, 06:48 PM
Stephane
 
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461 head for chevy

o.k guys the 461 head have a bathub shape chamber
is 3040 lbs of more torques at any rpm than 462.041.292etc
the bathub shape flow pretty good when ported and big valves
install.so its my best choice for sbc.
I got a set on my 327 i am really happy for the price,my friend
got a set of edelbrock perform , on a hot 355 any time my
friend see my tail light loll,
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Old 08-23-2005, 07:31 PM
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This thread is three years old!
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Old 08-27-2005, 06:19 PM
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Hola, I never see the date on this.
It,s my first computer,im gone learn again today
salute,
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