440 Source flow numbers
#2847489
11/17/20 11:39 AM
11/17/20 11:39 AM
|
Joined: Sep 2011
Posts: 1,487 STL
cdstl
OP
pro stock
|
OP
pro stock
Joined: Sep 2011
Posts: 1,487
STL
|
We had a discussion a while back about these heads. At $1000 for the pair, they are a pretty decent alternative. I would say that they deserve a trip to a machinist for a valve job, to increase flow, and to check for whatever else. My set had 2 valve spring seats under one of the springs.
The numbers are as delivered on the top line, the bottom row represents a valve job to open up the seats and center the valves. I don’t remember any numbers on how wide the as delivered seats were or what they are now.
FWIW, here you go...
1972 Cuda 340 4 speed, 2001 Ram CTD 4x4 6 speed, 1970 Duster 408 4 speed, 1996 Ram 5.9 2x4 auto, 1965 Coronet 500
|
|
|
Re: 440 Source flow numbers
[Re: cdstl]
#2847526
11/17/20 12:30 PM
11/17/20 12:30 PM
|
Joined: Oct 2006
Posts: 7,371 Iowa
burdar
Owen's Dad
|
Owen's Dad
Joined: Oct 2006
Posts: 7,371
Iowa
|
I would say that they deserve a trip to a machinist for a valve job, to increase flow, and to check for whatever else. My set had 2 valve spring seats under one of the springs. So what does a machine shop charge to inspect a brand new set of heads? My local shop charges $500 to rebuild a set of factory heads.(new guides, grind valves/seats and surface head) If a shop is going to charge that, your $1000 set of heads turns into a $1500 set.
|
|
|
Re: 440 Source flow numbers
[Re: burdar]
#2847553
11/17/20 12:55 PM
11/17/20 12:55 PM
|
Joined: Sep 2014
Posts: 1,411 Central Pa
moparjim79
pro stock
|
pro stock
Joined: Sep 2014
Posts: 1,411
Central Pa
|
I would say that they deserve a trip to a machinist for a valve job, to increase flow, and to check for whatever else. My set had 2 valve spring seats under one of the springs. So what does a machine shop charge to inspect a brand new set of heads? My local shop charges $500 to rebuild a set of factory heads.(new guides, grind valves/seats and surface head) If a shop is going to charge that, your $1000 set of heads turns into a $1500 set. .....Which is still a good deal for aluminum heads that are truly ready to go
|
|
|
Re: 440 Source flow numbers
[Re: moparjim79]
#2847683
11/17/20 04:00 PM
11/17/20 04:00 PM
|
Joined: Aug 2003
Posts: 43,292 Bend,OR USA
Cab_Burge
I Win
|
I Win
Joined: Aug 2003
Posts: 43,292
Bend,OR USA
|
I would say that they deserve a trip to a machinist for a valve job, to increase flow, and to check for whatever else. My set had 2 valve spring seats under one of the springs. So what does a machine shop charge to inspect a brand new set of heads? My local shop charges $500 to rebuild a set of factory heads.(new guides, grind valves/seats and surface head) If a shop is going to charge that, your $1000 set of heads turns into a $1500 set. .....Which is still a good deal for aluminum heads that are truly ready to go Me thinks the Eddy 75.0 CC chamber RPM head is a better deal at $1500.00 a set from Summit than having to have the 440 source heads tricked out to flow almost as much as the Eddy do out of the box
Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
|
|
|
Re: 440 Source flow numbers
[Re: burdar]
#2847773
11/17/20 06:54 PM
11/17/20 06:54 PM
|
Joined: May 2005
Posts: 4,753 Florida
BDW
master
|
master
Joined: May 2005
Posts: 4,753
Florida
|
Curious about cost too, intake picked up ~8% flow improvement. Exhaust looks like no improvement, so is the juice worth the squeeze?
Last edited by BDW; 11/17/20 06:57 PM.
|
|
|
Re: 440 Source flow numbers
[Re: Stanton]
#2847821
11/17/20 08:23 PM
11/17/20 08:23 PM
|
Joined: Nov 2007
Posts: 21,844 Kirkland, Washington
Pacnorthcuda
Too Many Posts
|
Too Many Posts
Joined: Nov 2007
Posts: 21,844
Kirkland, Washington
|
I think you're all missing the point of a 440Source head ... they are made to be a direct replacement for a standard cast iron head. So compare apples to apples. As they come from 440Source is probably as good as any iron head out of the factory. If you're going to have heads checked, machined, ported, polished, blueprinted and flowed then you probably shouldn't be starting with 440Source heads !! Unless factory appearance is important! If it is, the 440source are the way to go. If you clean them up even better.
|
|
|
Re: 440 Source flow numbers
[Re: Stanton]
#2847875
11/17/20 10:34 PM
11/17/20 10:34 PM
|
Joined: Sep 2014
Posts: 1,411 Central Pa
moparjim79
pro stock
|
pro stock
Joined: Sep 2014
Posts: 1,411
Central Pa
|
I think you're all missing the point of a 440Source head ... they are made to be a direct replacement for a standard cast iron head. So compare apples to apples. As they come from 440Source is probably as good as any iron head out of the factory. If you're going to have heads checked, machined, ported, polished, blueprinted and flowed then you probably shouldn't be starting with 440Source heads !! Disagree, dollar for dollar the 440 source heads win just because of the weight first and foremost. Then ease of porting. And deck mill. But if you just slap em on, still 9/10 better than a factory iron head
|
|
|
Re: 440 Source flow numbers
[Re: burdar]
#2847914
11/17/20 11:50 PM
11/17/20 11:50 PM
|
Joined: Sep 2011
Posts: 1,487 STL
cdstl
OP
pro stock
|
OP
pro stock
Joined: Sep 2011
Posts: 1,487
STL
|
I would say that they deserve a trip to a machinist for a valve job, to increase flow, and to check for whatever else. My set had 2 valve spring seats under one of the springs. So what does a machine shop charge to inspect a brand new set of heads? My local shop charges $500 to rebuild a set of factory heads.(new guides, grind valves/seats and surface head) If a shop is going to charge that, your $1000 set of heads turns into a $1500 set. My machinist only charged me $75 per head for the valve job, remember that he is doing an entire build for me. I picked these heads because I'm trying to keep a factory car looking factory but I wanted to pick up some power. And don't forget that the factory heads that were on the car didn't have hardened seats either. If I have another similar car to redo, then I'll use these heads once again. For a performance build, it'll be something else. This was just an informational post.
1972 Cuda 340 4 speed, 2001 Ram CTD 4x4 6 speed, 1970 Duster 408 4 speed, 1996 Ram 5.9 2x4 auto, 1965 Coronet 500
|
|
|
Re: 440 Source flow numbers
[Re: Cab_Burge]
#2848080
11/18/20 12:12 PM
11/18/20 12:12 PM
|
Joined: Jan 2003
Posts: 20,894 A collage of whims
topside
Too Many Posts
|
Too Many Posts
Joined: Jan 2003
Posts: 20,894
A collage of whims
|
I've had both Eddys & Stealths on a couple of RBs. No big problems with either, though both required a little work on valve job & guides. I also changed springs on both to a double style. I like the Stealths for their stock-ish look; the old street-racer sneaky thing dies hard . Wasn't going for max power on either, but was happy with the results.
|
|
|
Re: 440 Source flow numbers
[Re: BDW]
#2848410
11/18/20 11:24 PM
11/18/20 11:24 PM
|
Joined: Sep 2014
Posts: 4,457 Washington
madscientist
master
|
master
Joined: Sep 2014
Posts: 4,457
Washington
|
Curious about cost too, intake picked up ~8% flow improvement. Exhaust looks like no improvement, so is the juice worth the squeeze? Flow numbers are about meaningless on the exhaust side.
Just because you think it won't make it true. Horsepower is KING. To dispute this is stupid. C. Alston
|
|
|
Re: 440 Source flow numbers
[Re: cdstl]
#2848527
11/19/20 10:16 AM
11/19/20 10:16 AM
|
Joined: Sep 2011
Posts: 1,487 STL
cdstl
OP
pro stock
|
OP
pro stock
Joined: Sep 2011
Posts: 1,487
STL
|
I also forgot to mention that I had the small valve 516 heads on this motor so my flow probably picked up more than a newer head.
I'd do it again.
1972 Cuda 340 4 speed, 2001 Ram CTD 4x4 6 speed, 1970 Duster 408 4 speed, 1996 Ram 5.9 2x4 auto, 1965 Coronet 500
|
|
|
Re: 440 Source flow numbers
[Re: madscientist]
#2848899
11/20/20 03:18 AM
11/20/20 03:18 AM
|
Joined: Feb 2014
Posts: 234 Brisvegas, Australia
Alchemi
enthusiast
|
enthusiast
Joined: Feb 2014
Posts: 234
Brisvegas, Australia
|
Curious about cost too, intake picked up ~8% flow improvement. Exhaust looks like no improvement, so is the juice worth the squeeze? Flow numbers are about meaningless on the exhaust side. Do you think that because few seem to test them flowing in the right direction?
Last edited by Alchemi; 11/20/20 03:31 AM.
|
|
|
Re: 440 Source flow numbers
[Re: burdar]
#2849051
11/20/20 01:04 PM
11/20/20 01:04 PM
|
Joined: May 2003
Posts: 6,569 Downtown Roebuck Ont
Twostick
Still wishing...
|
Still wishing...
Joined: May 2003
Posts: 6,569
Downtown Roebuck Ont
|
Me thinks the Eddy 75.0 CC chamber RPM head is a better deal at $1500.00 a set from Summit than having to have the 440 source heads tricked out to flow almost as much as the Eddy do out of the box Most everyone says the Edelbrocks need to be checked over by a machine shop too. They ALL need to be checked and corrected no matter who builds them. Trust me, Edelbrock heads aren't ready to go out of the box either. Kevin
|
|
|
|
|