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Re: 340 Edelbrock heads or 340 X heads
[Re: emarine01]
#294910
05/13/09 09:58 AM
05/13/09 09:58 AM
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Joined: Oct 2003
Posts: 11,684
W. Kentucky
justinp61
I Live Here
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I Live Here
Joined: Oct 2003
Posts: 11,684
W. Kentucky
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Quote:
Milling .065 off a J head and pocket porting the intake with a good valve job ,you will need to cut the intake side too, turns Js into quench head , A lot cheeper than eddies , similar results
I have a set of ported J heads, they flow in the low 260s on the intake, good valve job, milled .070. If they have any quench it's very little. My hydraulic cammed 340 went from 10.3-1 compression ratio and ran a best of 7.60 (1/8) with the iron heads to
11.2-1 with ported Edelbrocks and a best of 7.24 and lost almost 50# off the front end. I'll take the Edelbrocks over 40 year iron castings any time. 
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Re: 340 Edelbrock heads or 340 X heads
[Re: 73cuda340]
#294911
05/13/09 10:08 AM
05/13/09 10:08 AM
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Joined: Jan 2003
Posts: 5,486
SoCal
Brian Hafliger
master
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master
Joined: Jan 2003
Posts: 5,486
SoCal
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Quote:
What do you guys think would be a better choice for my car, the edelbrocks or the x heads? I currently have an LD 340 intake, Comp XE268 cam, Hooker competition headers with 2.5" exhaust, thermoquad carburetor and low compression 340. Would the power gained by the Edelbrock's be worth the $1400 for the heads? I'm on a tight budget so I don't want to spend the money if the gain wont be worthwhile. I dont have either set of heads right now so I'll be getting a set of either. Im trying to get this car to go 12's if possible.
Anyday now I should be getting the first set of RHS cast iron X heads in for evaluation. I'm thinking with a valve job, surface cut, and bow work they will be less than edelbrocks and make more HP than OOTB Eddy's.
But I can't say that for sure just yet....
Remember too, most guys do a valve job and surface cut on eddy heads before they use them, adding to the overall cost of the eddy's.
I'll post info just as soon as they come in!
Brian
Brian Hafliger
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Re: 340 Edelbrock heads or 340 X heads
[Re: justinp61]
#294912
05/13/09 10:15 AM
05/13/09 10:15 AM
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Joined: Oct 2004
Posts: 8,165
Left Coast
BobR
master
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master
Joined: Oct 2004
Posts: 8,165
Left Coast
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Quote:
Quote:
Milling .065 off a J head and pocket porting the intake with a good valve job ,you will need to cut the intake side too, turns Js into quench head , A lot cheeper than eddies , similar results
I have a set of ported J heads, they flow in the low 260s on the intake, good valve job, milled .070. If they have any quench it's very little. My hydraulic cammed 340 went from 10.3-1 compression ratio and ran a best of 7.60 (1/8) with the iron heads to
11.2-1 with ported Edelbrocks and a best of 7.24 and lost almost 50# off the front end. I'll take the Edelbrocks over 40 year iron castings any time.
I don't like iron heads and will always take aluminum for a couple of reasons. I really don't know why anyone makes iron heads any more. The OEM now uses aluminum almost exclusively.
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Re: 340 Edelbrock heads or 340 X heads
[Re: 70AARcuda]
#294913
05/13/09 10:46 AM
05/13/09 10:46 AM
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Anonymous
Unregistered
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Anonymous
Unregistered
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Quote:
Quote:
Power gained? Maybe with a lot more compression, full ported X heads are better. For that price I would suggest W2.
the guy only wants to get into the 12s...
the price for w2 rockers these days will cost pretty close to 1000.00...then he needs new intake manifold, headers, pushrods, plus the cost of the heads and machine work...
the eddies are a very cost effective buy..the eddies out of the box will get ya there.
Thats why i sold my w2's and w5 heads,you smoke a rocker and you can't even get a replacement,you have to spend over a $grand for new complete rocker set up as crane and mopar no longer offer them,
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Re: 340 Edelbrock heads or 340 X heads
#294914
05/13/09 12:33 PM
05/13/09 12:33 PM
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Joined: Mar 2003
Posts: 15,491
the boonies
aarcuda
I Live Here
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I Live Here
Joined: Mar 2003
Posts: 15,491
the boonies
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im using the same old milled, ported and polished TA iron heads that ive had for 1lmost 20 years
Last edited by aarcuda; 05/13/09 12:34 PM.
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Re: 340 Edelbrock heads or 340 X heads
[Re: 73cuda340]
#294918
05/24/09 09:36 PM
05/24/09 09:36 PM
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Joined: Jun 2007
Posts: 1,180
clarks summit pa
73cuda340
OP
super stock
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OP
super stock
Joined: Jun 2007
Posts: 1,180
clarks summit pa
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heads
Last edited by 73cuda340; 05/24/09 09:44 PM.
1973 Cuda 528 all aluminum Hemi, 4 speed, 3.23 Sure-Grip,
(JA5) Silver Frost Metallic
1973 Challenger Rallye 340
1985 W150 Power Ram prospector
1986 Camaro IROC-Z 305 tpi
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Re: 340 Edelbrock heads or 340 X heads
[Re: Cab_Burge]
#294921
05/25/09 11:39 PM
05/25/09 11:39 PM
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Joined: Jun 2007
Posts: 1,180
clarks summit pa
73cuda340
OP
super stock
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OP
super stock
Joined: Jun 2007
Posts: 1,180
clarks summit pa
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Quote:
Quote:
I bought a set of ported J heads at carlisle for $650. Fully rebuilt and it looks like they might have been milled. Supposedly flow more than Edelbrocks out of the box, according to the guy. Well see how it goes.
I sincerely hope that those heads work for you, most guys selling used parts are not real truthful. You now have a set of 40 + year old heads that should be taken aprt and carefully inspecrted and magnaflux before using them If your not going to listen to the advice offered on here why waste those peoples time    When it comes to buying parts for high performance motors you can buy the good parts once or buy the used parts many times looking for the good ones   LIVE and LEARN 
I wasn't wasting anybody's time and I listened to what everybody had to say and I appreciate all of the replies. But it's not like I just bought these heads to buy them, the ones on the motor currently are the 1.88 intakes and all of the valve seats are worn away so badly that I can see a gap between the valve and the seat in some spots, so instead of dumping tons of money into the heads I bought new ones. Plus I'm only 18 and my car is still in the body shop so Im on a very tight budget and have to work with what I have. Im not looking for a full blown race car, I just wanted to hopefully go 12's or low 13's. Thanks to everybody for their input.
1973 Cuda 528 all aluminum Hemi, 4 speed, 3.23 Sure-Grip,
(JA5) Silver Frost Metallic
1973 Challenger Rallye 340
1985 W150 Power Ram prospector
1986 Camaro IROC-Z 305 tpi
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Re: 340 Edelbrock heads or 340 X heads
[Re: 73cuda340]
#294922
05/26/09 12:33 AM
05/26/09 12:33 AM
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Joined: Jan 2003
Posts: 6,144
Melbourne , Australia
LA360
master
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master
Joined: Jan 2003
Posts: 6,144
Melbourne , Australia
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If it's a budget deal, I'd look at the EQ Magnum heads. For the power required they'd more than do the job. I would steer away from a 40 y/o head if I could, last 360 headed engine I worked with, I bought 3 sets before I got a decent set, and they still had been welded for a crack.
AL....
Alan Jones
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Re: 340 Edelbrock heads or 340 X heads
[Re: 73cuda340]
#294923
05/26/09 07:56 AM
05/26/09 07:56 AM
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Joined: Jan 2003
Posts: 16,123
Grand Haven, MI
patrick
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 16,123
Grand Haven, MI
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Quote:
Quote:
Quote:
I bought a set of ported J heads at carlisle for $650. Fully rebuilt and it looks like they might have been milled. Supposedly flow more than Edelbrocks out of the box, according to the guy. Well see how it goes.
I sincerely hope that those heads work for you, most guys selling used parts are not real truthful. You now have a set of 40 + year old heads that should be taken aprt and carefully inspecrted and magnaflux before using them If your not going to listen to the advice offered on here why waste those peoples time When it comes to buying parts for high performance motors you can buy the good parts once or buy the used parts many times looking for the good ones LIVE and LEARN
I wasn't wasting anybody's time and I listened to what everybody had to say and I appreciate all of the replies. But it's not like I just bought these heads to buy them, the ones on the motor currently are the 1.88 intakes and all of the valve seats are worn away so badly that I can see a gap between the valve and the seat in some spots, so instead of dumping tons of money into the heads I bought new ones. Plus I'm only 18 and my car is still in the body shop so Im on a very tight budget and have to work with what I have. Im not looking for a full blown race car, I just wanted to hopefully go 12's or low 13's. Thanks to everybody for their input.
good luck, I hope they aren't cracked, I'd be leery about buying any 40 year old used set of heads without having a machine shop I trust go over them with a fine tooth comb. I woulda ponied up the extra $150 and bought the enginequest 318B's from hughes. all new parts from a reputable vendor, no suprises, verified on their bench to flow about the same as OOTB eddies, & cheaper aftermarket roller rocker options...
Last edited by patrick; 05/26/09 07:57 AM.
1976 Spinnaker White Plymouth Duster, /6 A833OD
1986 Silver/Twilight Blue Chrysler 5th Ave HotRod **SOLD!***
2011 Toxic Orange Dodge Charger R/T
2017 Grand Cherokee Overland
2014 Jeep Cherokee Latitude (holy crap, my daughter is driving)
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