Re: 440 source heads on factory 440 Magnum block
[Re: 68KillerBee]
#1540071
11/26/13 03:33 PM
11/26/13 03:33 PM
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Joined: Jan 2003
Posts: 16,376
dogdays
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 16,376
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If it's a stock shortblock and there's no V/P clearance now, there shouldn't be any with the new heads and same cam.
It never hurts to check, but don't let that worry stop you. You'll have about as much clearance as you have now. Think about it, the Source head is basically a copy of a 915, and the 906 is the same except for the open chamber. Valves are in the same location in space. You can usually run the stock rockers on the Source heads, too.
R.
Last edited by dogdays; 11/26/13 03:41 PM.
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Re: 440 source heads on factory 440 Magnum block
[Re: dogdays]
#1540072
11/26/13 03:56 PM
11/26/13 03:56 PM
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Joined: Jan 2003
Posts: 21,073
Niles , Ohio
therocks
oh wait.but hey.lets see.oh yeah.
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oh wait.but hey.lets see.oh yeah.
Joined: Jan 2003
Posts: 21,073
Niles , Ohio
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The M1 wont like a pretty much stock motor.Its more of a race manifold.Better to sell it unless you are building a more radical motor.Buy a Holley intake.Rocky
Chrysler Firepower
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Re: 440 source heads on factory 440 Magnum block
[Re: 411Dude]
#1540075
11/26/13 08:00 PM
11/26/13 08:00 PM
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Joined: Feb 2005
Posts: 4,314
Prospect, PA
BSB67
master
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master
Joined: Feb 2005
Posts: 4,314
Prospect, PA
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Quote:
I'm not sure if anyone has covered this question. I have an original 69 440 magnum factory pistons, etc. (Grandmas 69 Charger R/T) If I pulled the 906 heads off and put 440 source heads, on would there be any valve to piston problems, large compression ratio changes, or other issues. I was considering this for the weight savings, factory look, and a bit more hp. I have a mopar m1 factory style alum. manifold also. Has anyone done this?
I have not done this.
My opinion is that it should work well. If the heads have 80 cc chambers, and the motor does indeed have its original 2.034" CH pistons, you will be at an honest 9.8:1 compression ratio (0.040" gasket). I believe that the actual compression distance from the factory in an uncut block with these pistons is about 0.050" in the hole. Someone please correct me if I'm wrong.
On my 440 with factory 915's with this exact piston and a stockish cam (MP 272 w/.455" lift) had about 0.25" p/v clearance on the intake and I could not even find the exhaust valve.
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Re: 440 source heads on factory 440 Magnum block
[Re: therocks]
#1540076
11/27/13 06:03 AM
11/27/13 06:03 AM
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Joined: Dec 2012
Posts: 50
Australia
big_wedge
member
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member
Joined: Dec 2012
Posts: 50
Australia
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Quote:
The M1 wont like a pretty much stock motor.Its more of a race manifold.Better to sell it unless you are building a more radical motor.Buy a Holley intake.Rocky
if you are meaning a holley street dom there is no difference at this level. Iv tryed it.. went back and tryed it again then went forward and tryed it again..... no difference other than the street dom has way better hood clearence.. street don wins... at this level
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Re: 440 source heads on factory 440 Magnum block
[Re: 411Dude]
#1540077
11/27/13 08:40 AM
11/27/13 08:40 AM
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Joined: Jan 2003
Posts: 21,073
Niles , Ohio
therocks
oh wait.but hey.lets see.oh yeah.
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oh wait.but hey.lets see.oh yeah.
Joined: Jan 2003
Posts: 21,073
Niles , Ohio
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Which Source heads do you have?If the early ones check the chamber close.Some gaskets overhang into them.I run the Marine gaskets on mine.Been on 4 years or so and street driven.No problems.Rocky
Chrysler Firepower
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