double hump heads
Thread Starter
Team Owner
Joined: Jan 2006
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From: Into the Mystic And yet, despite the look on my face, you're still talking TN
St. Jude Donor '09 thru '25
double hump heads
Ran across a set of 1970 double hump 1.94 heads for $350. With the accessory bolt holes. Even if I double that with machine shop work, it's still half the cost of AFR heads and they still look like Chevy heads.
Going on my 79 L82 along with a cam change. True duals, Lars carb and recurved ignition has woke it up but I'm looking to really wake it up now.
What sayeth the all knowing small block gurus? Deal or no deal?
Going on my 79 L82 along with a cam change. True duals, Lars carb and recurved ignition has woke it up but I'm looking to really wake it up now.
What sayeth the all knowing small block gurus? Deal or no deal?
Team Owner
Joined: Oct 2004
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From: altered state
St. Jude Donor '05
Might be half the cost but dont expect to be impressed with the power.
Sure AFRS are more but the power level will slaughter the best ported iron ones with a lifetime warrantee
Sure AFRS are more but the power level will slaughter the best ported iron ones with a lifetime warrantee
Safety Car
Joined: Jan 2008
Posts: 3,791
Likes: 428
From: Aarhus, Denmark
Ran across a set of 1970 double hump 1.94 heads for $350. With the accessory bolt holes. Even if I double that with machine shop work, it's still half the cost of AFR heads and they still look like Chevy heads.
Going on my 79 L82 along with a cam change. True duals, Lars carb and recurved ignition has woke it up but I'm looking to really wake it up now.
What sayeth the all knowing small block gurus? Deal or no deal?
Going on my 79 L82 along with a cam change. True duals, Lars carb and recurved ignition has woke it up but I'm looking to really wake it up now.
What sayeth the all knowing small block gurus? Deal or no deal?
Before you buy, then please inspect as much as you can, if you need new valves or guides plus cutting the seat, then the price will go up quiet a bit.
Below is a set of 69 186 heads from my extra L46 engine, the engine cam from a 69 convertible with 65k miles on it.
I did grind the valves with my valve grinding machine, but I had to grind much, so they are close to be scraped, I didn't because the engine will never come into a car again.
After a bit of work, but still not finish.
Thread Starter
Team Owner
Joined: Jan 2006
Posts: 39,315
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From: Into the Mystic And yet, despite the look on my face, you're still talking TN
St. Jude Donor '09 thru '25
I'm just wondering if they're worth it if I have to throw a bunch more money at them with reconditioning at a machine shop.
Iron Darts are $1300 and AFR is running about $1650.
Not trying to build a fire breather and the double humps have to be a tremendous improvement over the stock heads.
Safety Car
Joined: Jan 2008
Posts: 3,791
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From: Aarhus, Denmark
That's what I thought, too, but he says these are 1.94. According to the seller, only the Z28 engine was 2.02
I'm just wondering if they're worth it if I have to throw a bunch more money at them with reconditioning at a machine shop.
Iron Darts are $1300 and AFR is running about $1650.
Not trying to build a fire breather and the double humps have to be a tremendous improvement over the stock heads.
I'm just wondering if they're worth it if I have to throw a bunch more money at them with reconditioning at a machine shop.
Iron Darts are $1300 and AFR is running about $1650.
Not trying to build a fire breather and the double humps have to be a tremendous improvement over the stock heads.
He is a AFR seller, with full AFR program.
PM me, if you want contact info.
Safety Car
Joined: Mar 2007
Posts: 3,652
Likes: 49
From: Bridgewater nj
The slight bump in compression might save your low end torque if you are installing a slightly bigger cam but as stated above, don't expect the 30-40hp jump in power that the aluminum heads are delivering.
With that said and depending on cam choice, it could be a fun little 350
With that said and depending on cam choice, it could be a fun little 350
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Race Director
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That's what I thought, too, but he says these are 1.94. According to the seller, only the Z28 engine was 2.02
I'm just wondering if they're worth it if I have to throw a bunch more money at them with reconditioning at a machine shop.
Iron Darts are $1300 and AFR is running about $1650.
Not trying to build a fire breather and the double humps have to be a tremendous improvement over the stock heads.
I'm just wondering if they're worth it if I have to throw a bunch more money at them with reconditioning at a machine shop.
Iron Darts are $1300 and AFR is running about $1650.
Not trying to build a fire breather and the double humps have to be a tremendous improvement over the stock heads.
Safety Car
Joined: Oct 2007
Posts: 3,729
Likes: 267
From: Austin Texas
Corvette of the Year Winner 2017
2016 C3 of Year Finalist
however if your gonning to rework the heads, drop in new hardened seats,
just install 2.02 valves, new guides and of course you want screw in studs.
to properly rework the heads, with machine work and new valves/springs,
your looking at app. $1000.
just install 2.02 valves, new guides and of course you want screw in studs.
to properly rework the heads, with machine work and new valves/springs,
your looking at app. $1000.
Team Owner
Joined: Apr 1999
Posts: 21,953
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From: Reno Nevada
2024 C3 of the Year Finalist- Modified
That's what I thought, too, but he says these are 1.94. According to the seller, only the Z28 engine was 2.02
I'm just wondering if they're worth it if I have to throw a bunch more money at them with reconditioning at a machine shop.
Iron Darts are $1300 and AFR is running about $1650.
Not trying to build a fire breather and the double humps have to be a tremendous improvement over the stock heads.
I'm just wondering if they're worth it if I have to throw a bunch more money at them with reconditioning at a machine shop.
Iron Darts are $1300 and AFR is running about $1650.
Not trying to build a fire breather and the double humps have to be a tremendous improvement over the stock heads.
Le Mans Master
Joined: Oct 2010
Posts: 6,903
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From: melbourne florida
2023 C3 of the Year Finalist - Modified
Adding 2.02 valves and opening the throat will give you about the same flow as the L-82 heads. The only advantage is the smaller chamber. I agree they would be a waste of time and would limit the improvement from the cam.
Race Director
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From: Corsicana, Tx
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2020 Corvette of the Year (performance mods)
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It's not worth the trouble at all. Some more compression isn't going to change the world as opposed to some heads that actually flow. Those are likely worse than your L-82 heads.
Save your money until you can afford some real performance heads.
JIM
Save your money until you can afford some real performance heads.
JIM
Thread Starter
Team Owner
Joined: Jan 2006
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From: Into the Mystic And yet, despite the look on my face, you're still talking TN
St. Jude Donor '09 thru '25
You guys are right, by the time I have the double hump heads reworked I can almost buy new technology Vortec or Dart or even AFR. I would like to use my existing intake and valve covers but it's my understanding I can't do that with the Vortec heads. Can't seem to find that out about the Darts. AFR I can reuse them, also. Maybe the Chinese stuff is OK but I would much rather use a USA cast head.
Sooooooo, now what do you think?
Sooooooo, now what do you think?
Team Owner
Joined: Oct 2004
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From: altered state
St. Jude Donor '05
BTDT with some 461 bigger valves milling screw in studsbowl blend etc it ran exactly the same;complete waste of money!
If there was a difference I sure couldnt telll
Save and get some good American made heads
If there was a difference I sure couldnt telll
Save and get some good American made heads
Last edited by cv67; Oct 20, 2016 at 10:20 AM.
Safety Car
Joined: Jan 2008
Posts: 3,791
Likes: 428
From: Aarhus, Denmark
You guys are right, by the time I have the double hump heads reworked I can almost buy new technology Vortec or Dart or even AFR. I would like to use my existing intake and valve covers but it's my understanding I can't do that with the Vortec heads. Can't seem to find that out about the Darts. AFR I can reuse them, also. Maybe the Chinese stuff is OK but I would much rather use a USA cast head.
Sooooooo, now what do you think?
Sooooooo, now what do you think?
Le Mans Master
Joined: Oct 2010
Posts: 6,903
Likes: 834
From: melbourne florida
2023 C3 of the Year Finalist - Modified
I know people have gotten good results and swear by the vortec heads but I'm not really impressed with them. Dart is likely the most cost effective units out there that are American made.
Drifting
Joined: Jun 2012
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From: Port St. Lucie Fl
Last edited by Kacyc3; Oct 20, 2016 at 02:51 PM.
Thread Starter
Team Owner
Joined: Jan 2006
Posts: 39,315
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From: Into the Mystic And yet, despite the look on my face, you're still talking TN
St. Jude Donor '09 thru '25
