Re: Mopar 3462346 head
[Re: gygeneral]
#1521560
10/22/13 05:32 PM
10/22/13 05:32 PM
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Joined: Jun 2006
Posts: 5,160
CT
GTX MATT
master
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master
Joined: Jun 2006
Posts: 5,160
CT
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No 452s are the ones you're looking for
Now I need to pin those needles, got to feel that heat
Hear my motor screamin while I'm tearin up the street
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Re: Mopar 3462346 head
[Re: GTX MATT]
#1521561
10/22/13 05:37 PM
10/22/13 05:37 PM
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Joined: Sep 2007
Posts: 1,053
Ont, Canada
gygeneral
OP
super stock
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OP
super stock
Joined: Sep 2007
Posts: 1,053
Ont, Canada
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Quote:
No 452s are the ones you're looking for
I was asking because I'm just planning the rebuilding of my 440-6 motor in my RR and these are the heads on it. So I guess I must get the seats done to run with today's fuel right?
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Re: Mopar 3462346 head
[Re: Cab_Burge]
#1521563
10/22/13 07:17 PM
10/22/13 07:17 PM
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Joined: Aug 2005
Posts: 4,799
ILL
MLR426
master
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master
Joined: Aug 2005
Posts: 4,799
ILL
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Quote:
Quote:
Quote:
No 452s are the ones you're looking for
I was asking because I'm just planning the rebuilding of my 440-6 motor in my RR and these are the heads on it. So I guess I must get the seats done to run with today's fuel right?
Not neccessarily, if you have standard OEM exhaust valves yes you should  If they are replacemnt stainess steel valves probally not   I have a bunch of pump gas motors out there with 906 heads and 1.81 stainless steel replacement exhaust valves along with new stainless steel 2.14 intake valves, no complaints on the valves burning up or tulliping on pump gas so far  It can't hurt to have harden seats put in them and larger valves, if you want both more performance and longivity
Yes air on the safe side and have seats put in for longivity. Also have the shop that does the work, remove the step out of the exhaust pocket and blend it after they install the new hard seat.
MLR426
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Re: Mopar 3462346 head
[Re: Rick_Ehrenberg]
#1521567
10/23/13 02:59 PM
10/23/13 02:59 PM
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Joined: Feb 2003
Posts: 12,675
Columbia, CT
moper
I Live Here
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I Live Here
Joined: Feb 2003
Posts: 12,675
Columbia, CT
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346s were the first ones (1971) with induction hardened seats.. The 452s were the next evolution. I would put seats into it because the valve job will grind through it.
Well, art is art, isn't it? Still, on the other hand, water is water! And east is east and west is west and if you take cranberries and stew them like applesauce they taste much more like prunes than rhubarb does. Now, uh... Now you tell me what you know.
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Re: Mopar 3462346 head
[Re: jake4cars]
#1521573
10/24/13 08:00 PM
10/24/13 08:00 PM
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Joined: Nov 2004
Posts: 843
Suffolk,VA
ireland383
super stock
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super stock
Joined: Nov 2004
Posts: 843
Suffolk,VA
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Quote:
I thought 346's did have hardened seats from the factory. I know from porting them that they make good horsepower. On an unleaded engine I would use 346's or 452's any day.
Joey
The 346's on my 71 engine had them from the factory.
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