Double Hump heads
09-17-2002, 09:04 PM
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Car: 99 Formula
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Double Hump heads
Someone has a set of double hump heads for sale. 2.005/1.6 valves or so. Springs can handle up to .560 lift. And have been decked to 62cc. He's goin to have them checked out to make sure there is nothing wrong.
Are these good heads? would they work well with my setup?
Sorry for all the head ?s as of late, but I'm on a budget and can't afford any old head.
Are these good heads? would they work well with my setup?
Sorry for all the head ?s as of late, but I'm on a budget and can't afford any old head.
09-17-2002, 09:13 PM
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considering they'd be over 30 years old there's going to be something wrong with them, and if they've been fixed you'll pay for it. the springs ought to be replaced, or checked out, easier to just replace. you can spend your money on better newer heads.
09-17-2002, 09:18 PM
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Originally posted by rezinn
Got casting numbers? They could be good heads, but may not have accessory bolt holes.
Got casting numbers? They could be good heads, but may not have accessory bolt holes.
09-17-2002, 10:05 PM
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"Camel Hump" are like Grandpa... there better left to rest. 
They're good heads for collectors (of paper weights
), but other than that, they're (as ede said) 30 yr old technology.
I've used a pair on a 350 for an early 70's Nova. They ran pretty well after some standard porting, but weren't "the shi-t". An old timer I know had them lying around. They were good enough for 13.5 at 108MPH.
Just remember, the TRUE Camel Hump heads have no accessory holes at all. You'd have to have them machined for accessory brackets if it's not already done.
They're good heads for collectors (of paper weights
), but other than that, they're (as ede said) 30 yr old technology.I've used a pair on a 350 for an early 70's Nova. They ran pretty well after some standard porting, but weren't "the shi-t". An old timer I know had them lying around. They were good enough for 13.5 at 108MPH.
Just remember, the TRUE Camel Hump heads have no accessory holes at all. You'd have to have them machined for accessory brackets if it's not already done.
09-17-2002, 10:08 PM
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Car: 1986 Sport Coupé
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Originally posted by CamaroDriver
Just remember, the TRUE Camel Hump heads have no accessory holes at all. You'd have to have them machined for accessory brackets if it's not already done.
Just remember, the TRUE Camel Hump heads have no accessory holes at all. You'd have to have them machined for accessory brackets if it's not already done.
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09-17-2002, 11:06 PM
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I have some 370 castings that have accessory bolt holes (1969-1970). They were on my 383 that ran high 11's. I invested more into the heads than they were worth but they still worked.
09-17-2002, 11:49 PM
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Originally posted by Sitting Bull
Not so. Some did have accessory holes in them, the later model ones.
Not so. Some did have accessory holes in them, the later model ones.
09-18-2002, 03:15 AM
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Car: 1986 Sport Coupé
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Originally posted by iroc22
Yeah but they weren't camel humps then. They had machined fronts.
Yeah but they weren't camel humps then. They had machined fronts.
09-18-2002, 03:48 AM
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Originally posted by CamaroDriver
"Camel Hump" are like Grandpa... there better left to rest.
They're good heads for collectors (of paper weights ), but other than that, they're (as ede said) 30 yr old technology.
I've used a pair on a 350 for an early 70's Nova. They ran pretty well after some standard porting, but weren't "the shi-t". An old timer I know had them lying around. They were good enough for 13.5 at 108MPH.
Just remember, the TRUE Camel Hump heads have no accessory holes at all. You'd have to have them machined for accessory brackets if it's not already done.
"Camel Hump" are like Grandpa... there better left to rest.
They're good heads for collectors (of paper weights
), but other than that, they're (as ede said) 30 yr old technology.I've used a pair on a 350 for an early 70's Nova. They ran pretty well after some standard porting, but weren't "the shi-t". An old timer I know had them lying around. They were good enough for 13.5 at 108MPH.
Just remember, the TRUE Camel Hump heads have no accessory holes at all. You'd have to have them machined for accessory brackets if it's not already done.
Okay, this has nothing to do with the post, but I just went to the link in your sig and nearly pi$$ed myself.
09-18-2002, 04:16 AM
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The camel back heads are a good choice,
especialy if they have the accessory bolt holes.
Out of the box they flow better than the heads you have
They have the right chamber size.
The high performance chamber is worth torque and hp.
They really shine whan ported and modified.
On the down side they may be cracked (commn problem)
They may not have the accessory holes
They may need work , valves , guides etc.
You'll have to weight out wether you can bring them up to snuff
within a reasonable budget.
But you're on the right track....
see if you can get tyhe casting # again.
especialy if they have the accessory bolt holes.
Out of the box they flow better than the heads you have
They have the right chamber size.
The high performance chamber is worth torque and hp.
They really shine whan ported and modified.
On the down side they may be cracked (commn problem)
They may not have the accessory holes
They may need work , valves , guides etc.
You'll have to weight out wether you can bring them up to snuff
within a reasonable budget.
But you're on the right track....
see if you can get tyhe casting # again.
09-18-2002, 05:27 AM
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Car: 89rs (previous 2.8)
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Transmission: 700r4 (for now)
I have a set of 462's I am taking off the 327...no acc. holes are a PITA....I would look for a more up to date choice.....just 1 opinion.
P>S> Ill sell them cheap!
P>S> Ill sell them cheap!
09-18-2002, 07:28 AM
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Car: 92 T/A VERT
Engine: LB9
Transmission: AUTO
Axle/Gears: 7.5 / 3.42's
If you could get your heads and intake sold for a couple hundred bucks you could buy the vortecs and vortec intake and still come in around your budget.
09-18-2002, 07:35 AM
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I hate to keep pushing the vortecs on you but for the amount of money your looking to spend your going to be faster with them than anything else.
09-18-2002, 07:52 AM
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I dunno how good/bad these heads are, but you may want to take a look at them if your budget is tight.
http://www.jegs.com/cgi-bin/ncommerc...50&prmenbr=361
http://www.jegs.com/cgi-bin/ncommerc...50&prmenbr=361
09-18-2002, 08:21 AM
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whats so special about the vortec heads? i have heard that they are only around 600 bucks through GM. i was also looking into the JEG's heads posted above...but i know nothing about heads!! what kind of performance differance doesheads make?
09-18-2002, 09:14 AM
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Car: 99 Formula
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Originally posted by Scott_92RS
I dunno how good/bad these heads are, but you may want to take a look at them if your budget is tight.
http://www.jegs.com/cgi-bin/ncommerc...50&prmenbr=361
I dunno how good/bad these heads are, but you may want to take a look at them if your budget is tight.
http://www.jegs.com/cgi-bin/ncommerc...50&prmenbr=361
09-18-2002, 09:23 AM
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Car: 1992 RS
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Maybe its time to get your save on. I dont know how many times I've heard people say that the one place you dont want to skimp on is the heads. There is lots of power to be made in the heads, and weigh to be saved as well if you go with aluminum heads. How much are you spending on heads you have in mind? Add the cost of new springs/seals, maybe a valve job, and machining for accessory holes, and you might as well buy the heads I posted above. Its ultimately your decision, I'm just throwin some stuff on the table.
09-18-2002, 09:53 AM
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Car: 99 Formula
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I was planning on $500 which I know isn't much at all, but then by the time I add in gaskets for the headers and heads, that will be close to another $100. I already have valve springs to match my cam still in the box, so I could buy bare heads, but then I would have to buy new valves.
I really need to find out about the ones my brother knows about, he knows a guy selling some 2.02/1.6 64cc ones brand new for $500, I just don't konw the brand yet.
I really need to find out about the ones my brother knows about, he knows a guy selling some 2.02/1.6 64cc ones brand new for $500, I just don't konw the brand yet.
09-18-2002, 12:23 PM
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Car: 1992 RS
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Taken from: http://www.chevytalk.com/tech/engine/SBC_Heads.html
"492" – 3991492. Another good performance head. They were found on 1970 LT-1 engines. They had 2.02/1.60" valves, 64CC combustion chambers, DO have accessory holes, intake port volume should be 161CC's, exhaust port volume should be 62CC's. These heads have double hump casting marks. This particular casting head was also available as an "over the counter" head from GM in straight or angle plug configurations
09-18-2002, 12:44 PM
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Car: 1986 Sport Coupé
Engine: 305-4v
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Mark,
Go here and look up the flow bench numbers that Chevy Hi Performance recorded for those heads: http://www.chevyhiperformance.com/ed...&viewtype=text
They might be OK to work with.
Or it may be that your current heads are nice to work with. They have a pretty extensive listing.
And, of course, there is my thread on DIY head porting if you feel up to it ... Come on, you're a man!!!
Go here and look up the flow bench numbers that Chevy Hi Performance recorded for those heads: http://www.chevyhiperformance.com/ed...&viewtype=text
They might be OK to work with.
Or it may be that your current heads are nice to work with. They have a pretty extensive listing.
And, of course, there is my thread on DIY head porting if you feel up to it ... Come on, you're a man!!!
Last edited by Sitting Bull; 09-18-2002 at 12:47 PM.
09-18-2002, 12:55 PM
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Originally posted by Sitting Bull
Mark,
Go here and look up the flow bench numbers that Chevy Hi Performance recorded for those heads: http://www.chevyhiperformance.com/ed...&viewtype=text
They might be OK to work with.
Or it may be that your current heads are nice to work with. They have a pretty extensive listing.
And, of course, there is my thread on DIY head porting if you feel up to it ... Come on, you're a man!!!
Mark,
Go here and look up the flow bench numbers that Chevy Hi Performance recorded for those heads: http://www.chevyhiperformance.com/ed...&viewtype=text
They might be OK to work with.
Or it may be that your current heads are nice to work with. They have a pretty extensive listing.
And, of course, there is my thread on DIY head porting if you feel up to it ... Come on, you're a man!!!
The heads I have now are 76cc heads and are junk from what I hear.
09-18-2002, 12:58 PM
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Originally posted by Sitting Bull
Mark,
Go here and look up the flow bench numbers that Chevy Hi Performance recorded for those heads: http://www.chevyhiperformance.com/ed...&viewtype=text
p
Mark,
Go here and look up the flow bench numbers that Chevy Hi Performance recorded for those heads: http://www.chevyhiperformance.com/ed...&viewtype=text
p
09-18-2002, 01:06 PM
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if you have new valve springs already, get those 492 heads and port them. they will flow way better than the heads you have now, plus they 64 cc combustion chambers, which means more compression and there is some real power there.
09-18-2002, 01:08 PM
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Car: 99 Formula
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Originally posted by darbleinad
if you have new valve springs already, get those 492 heads and port them. they will flow way better than the heads you have now, plus they 64 cc combustion chambers, which means more compression and there is some real power there.
if you have new valve springs already, get those 492 heads and port them. they will flow way better than the heads you have now, plus they 64 cc combustion chambers, which means more compression and there is some real power there.
What would be a fair price to offer if they're fine?
09-18-2002, 01:15 PM
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62cc means even more compression and more power. if the heads are okay make him an offer. as for price i am not sure. here in canada i might offer 300 if the springs and valves and everything where in good shape and the springs could handle high cam lift. but i am a cheap bastard and that offer might get shot down, so i really don know what to say. i am sure some one might have a better idea of what a good set of double hump heads goes for.
09-18-2002, 01:18 PM
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Originally posted by darbleinad
62cc means even more compression and more power. if the heads are okay make him an offer. as for price i am not sure. here in canada i might offer 300 if the springs and valves and everything where in good shape and the springs could handle high cam lift. but i am a cheap bastard and that offer might get shot down, so i really don know what to say. i am sure some one might have a better idea of what a good set of double hump heads goes for.
62cc means even more compression and more power. if the heads are okay make him an offer. as for price i am not sure. here in canada i might offer 300 if the springs and valves and everything where in good shape and the springs could handle high cam lift. but i am a cheap bastard and that offer might get shot down, so i really don know what to say. i am sure some one might have a better idea of what a good set of double hump heads goes for.
09-18-2002, 01:26 PM
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Car: 1986 Sport Coupé
Engine: 305-4v
Transmission: 700R4 and TransGo2
Originally posted by Mark A Shields
I don't see the 492s on that site, or am I missing something?
I don't see the 492s on that site, or am I missing something?
This is what they say:
Stock Production 462 Iron Head
This head was a small chamber head used on 327ci motors until the end of 1968. The flow can be improved a little with larger valves and port work but the additional cost of this is impractical in comparison to what you can by some other aftermarket casting for.
09-18-2002, 01:27 PM
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Originally posted by Sitting Bull
They list 462s. Are you sure that's not what you have?
Stock Production 462 Iron Head
This head was a small chamber head used on 327ci motors until the end of 1968. The flow can be improved a little with larger valves and port work but the additional cost of this is impractical in comparison to what you can by some other aftermarket casting for.
They list 462s. Are you sure that's not what you have?
Stock Production 462 Iron Head
This head was a small chamber head used on 327ci motors until the end of 1968. The flow can be improved a little with larger valves and port work but the additional cost of this is impractical in comparison to what you can by some other aftermarket casting for.
76cc 1.94/1.5 heads.
09-18-2002, 01:35 PM
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Car: 1986 Sport Coupé
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Originally posted by Mark A Shields
The 492s are what I am considering to buy maybe? Not sure of the ones I have now, they're the "hecho en mexico" ones.
76cc 1.94/1.5 heads.
The 492s are what I am considering to buy maybe? Not sure of the ones I have now, they're the "hecho en mexico" ones.
76cc 1.94/1.5 heads.
Why not just go the 305 head route? Following F-Bird'88s advice and using my thread as a guide, you can make excellent power for not much money.
The wreckers all have them for cheap, maybe $40. With 20 hrs. of your own time and then a 3 angle valve job and enlarging the intakes out to 1.94, you'll only have $400 in them.
Check the link at the end of my sig.
Last edited by Sitting Bull; 09-18-2002 at 01:38 PM.
09-18-2002, 01:40 PM
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Originally posted by Sitting Bull
Mark,
Why not just go the 305 head route? Following F-Bird'88s advice and using my thread as a guide, you can make excellent power for not much money.
The wreckers all have them for cheap, maybe $40. With 20 hrs. of your own time and then a 3 angle valve job and enlarging the intakes out to 1.94, you'll only have $400 in them.
Check the link at the end of my sig.
Mark,
Why not just go the 305 head route? Following F-Bird'88s advice and using my thread as a guide, you can make excellent power for not much money.
The wreckers all have them for cheap, maybe $40. With 20 hrs. of your own time and then a 3 angle valve job and enlarging the intakes out to 1.94, you'll only have $400 in them.
Check the link at the end of my sig.
09-18-2002, 01:43 PM
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Car: 1986 Sport Coupé
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Originally posted by Mark A Shields
Well, to sum up what RB83L69 told me, going one step forward with 305 heads to get compression isn't worth going 3 steps backward.
Well, to sum up what RB83L69 told me, going one step forward with 305 heads to get compression isn't worth going 3 steps backward.
There ain't no better bang for the buck, my man
READ THE THREAD I DIRECTED YOU TO!!!!
09-18-2002, 01:46 PM
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Originally posted by Sitting Bull
But THAT'S why you port, polish and bowl blend them!!! That's where you invest 20 hrs. in the heads and end up with pieces that flow as well as a new set of Vortecs.
There ain't no better bang for the buck, my man
READ THE THREAD I DIRECTED YOU TO!!!!
But THAT'S why you port, polish and bowl blend them!!! That's where you invest 20 hrs. in the heads and end up with pieces that flow as well as a new set of Vortecs.
There ain't no better bang for the buck, my man
READ THE THREAD I DIRECTED YOU TO!!!!
09-18-2002, 01:47 PM
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Car: 1986 Sport Coupé
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Originally posted by Mark A Shields
ahh, guess I shouldn't have thrown away the ole 305 then huh.
ahh, guess I shouldn't have thrown away the ole 305 then huh.
09-18-2002, 01:49 PM
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Originally posted by Sitting Bull
Just shop around the local wreckers. I'll bet you can get a used set for $25.
Just shop around the local wreckers. I'll bet you can get a used set for $25.
09-18-2002, 01:53 PM
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Originally posted by Mark A Shields
How would I know if they're are ok, like no cracks or what not? Or is that a visible type of thing?
How would I know if they're are ok, like no cracks or what not? Or is that a visible type of thing?
09-18-2002, 01:56 PM
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Originally posted by Mark A Shields
Can I stick 2.02/1.6 valves in them?
Can I stick 2.02/1.6 valves in them?
Last edited by Sitting Bull; 09-18-2002 at 02:00 PM.
09-18-2002, 02:00 PM
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Originally posted by Sitting Bull
Yes, but why bother? 1.94 and 1.50 valves flow excellently on Vortecs, and they'll make 450 hp. So, are you shooting for 500 hp or is 400 hp more like your limit?
Yes, but why bother? 1.94 and 1.50 valves flow excellently on Vortecs, and they'll make 450 hp. So, are you shooting for 500 hp or is 400 hp more like your limit?
09-18-2002, 05:43 PM
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Originally posted by CamaroDriver
Me to.... That's why it's there.
Me to....
That's why it's there.
09-18-2002, 07:02 PM
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i don't see any problem with the 492's. if they sucked so bad i wouldn't consistently see camel hump headed small blocks turning 10's and 11's at the track. when those folks begin ditching them to run some Trickflows or AFR heads then i will admit they are past their prime. afterall, just because something is old doesn't mean it is useless. if that were the case then ede would have been put in the retirement home already.
09-18-2002, 07:31 PM
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Originally posted by CamaroDriver
It takes a while to download. It's a JavaScript page.
It takes a while to download. It's a JavaScript page.
09-18-2002, 07:40 PM
#50
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Join Date: Jul 2001
Location: Pueblo Co
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Car: 1989 C4
Engine: L98
Transmission: 700r4
Axle/Gears: 307
Originally posted by Sitting Bull
Mark,
Why not just go the 305 head route? Following F-Bird'88s advice and using my thread as a guide, you can make excellent power for not much money.
The wreckers all have them for cheap, maybe $40. With 20 hrs. of your own time and then a 3 angle valve job and enlarging the intakes out to 1.94, you'll only have $400 in them.
Check the link at the end of my sig.
Mark,
Why not just go the 305 head route? Following F-Bird'88s advice and using my thread as a guide, you can make excellent power for not much money.
The wreckers all have them for cheap, maybe $40. With 20 hrs. of your own time and then a 3 angle valve job and enlarging the intakes out to 1.94, you'll only have $400 in them.
Check the link at the end of my sig.
1.94 valves are perfect for the street and strip 2.02's arent nessasary unless your running oval track and stay over 6k. Are you?