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Re: P5 heads
[Re: Diablo]
#436717
08/14/09 01:10 PM
08/14/09 01:10 PM
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Joined: Feb 2005
Posts: 699
Manassas, VA USA
Scamp451
OP
mopar
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OP
mopar
Joined: Feb 2005
Posts: 699
Manassas, VA USA
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Quote:
So what do they flow??? How big of an intake valve is in them???
Good question. As I learn a little more about cylinder heads, I would be curious to see what the runner looks like, the P7's look to be about 2-3 feet long! 
P5- 10° intake, 2° exhaust valve angles, and use a 5/16" stem based on the literature I found.
I had read or heard somewhere that they were trying to run a Hemi head when they were getting back in NASCAR, and NASCAR not only said NO but H*** NO!  Perhaps that is how the P7 was developed? I know there are some on this board that know alot more about it than me.
This is the only stock photo I could find of the P5's.
"Starting" with a 8.600" deck height, the rod must be the length of a 289 Ford or something, even with a 3.150" stoke? I guess they were bread to sing, rather than grunt.
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Re: P5 heads
[Re: JSL]
#436722
08/19/09 10:38 AM
08/19/09 10:38 AM
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Joined: Feb 2005
Posts: 699
Manassas, VA USA
Scamp451
OP
mopar
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OP
mopar
Joined: Feb 2005
Posts: 699
Manassas, VA USA
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Quote:
There were 2 versions of the R-4 block........one for the P-5
head (48º/59º tappet) and one for the wedge. (straight 48º)
Gilberto posted the 4 cylinder block that used a single P-5 HEMI
head. There was a Comp Eliminator @ INDY several years ago
that ran that......but, assume you meant a V-8 block.
Is this the car?
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Re: P5 heads
[Re: HEMIDARTS]
#436726
10/10/10 12:46 PM
10/10/10 12:46 PM
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Joined: Feb 2009
Posts: 1,019
Finland
mafo
super stock
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super stock
Joined: Feb 2009
Posts: 1,019
Finland
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interesting topic... I was thinking about a r3 block without lifter holes then you can make it fit and get those cubes  however many of the p5 castings were crap, I was offered to buy 2 pairs with intakes and hardware for a very god price but the seller advised against me buying !!, because of water leaks and other problems
-65 Valiant,420", all motor,2700#, dot tires, 8,42 @ 160,2
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Re: P5 heads
[Re: Scamp451]
#436729
10/11/10 07:05 PM
10/11/10 07:05 PM
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Joined: Sep 2009
Posts: 1,805
ky hills
thehemikid
top fuel
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top fuel
Joined: Sep 2009
Posts: 1,805
ky hills
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Quote:
As I mingle amongst the small block community, I am constantly learning something new which also raises more questions. One question that pops into my head once in a while that I always forget to ask about in conversation is about the P5 heads.
I understand they succeeded the W8's for the PS trucks. After that did Mopar just kill that engine program altogether? Curious as to why. Looks like a pretty mean top end. I know if one car that has one on an 4 cyl. in NHRA, and I guess maybe some dirt/circle 4 cyl. motors still run them, but not exactly sure.
I see the P7's for sale quite frequently, but never the P5's on any drag cars, or for sale. 
...This one was for sale here on Moparts & Race Junk in Feb 06 till it fell off the page with no responses. It was the 1st Gen P5 before the plug relocation (P5 HEMI). 
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Re: P5 heads
[Re: DaKuda]
#436732
10/12/10 03:52 AM
10/12/10 03:52 AM
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Joined: Sep 2009
Posts: 1,805
ky hills
thehemikid
top fuel
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top fuel
Joined: Sep 2009
Posts: 1,805
ky hills
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...They're closer to a polysphere, & similar to the Fueling. ...You can see the open area's where the next design (Hemi) spark plug's were relocated. This was an X-David Nickens P5 358ci.
Last edited by thehemikid; 10/12/10 10:08 PM.
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Re: P5 heads
[Re: thehemikid]
#436733
10/12/10 10:03 PM
10/12/10 10:03 PM
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Joined: Jan 2003
Posts: 6,146
Melbourne , Australia
LA360
master
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master
Joined: Jan 2003
Posts: 6,146
Melbourne , Australia
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The P5 heads shown were considered to be the "Wedge" heads, when the plugs went through the Rocker covers, they started with the Hemi marketing. At the end of the day they are just a Splayed valve wedge head, like the Hemi 99 heads.
Alan Jones
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Re: P5 heads
[Re: LA360]
#436734
10/13/10 12:31 AM
10/13/10 12:31 AM
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Joined: Oct 2008
Posts: 1,015
Down South
DaKuda
super stock
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super stock
Joined: Oct 2008
Posts: 1,015
Down South
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Quote:
The P5 heads shown were considered to be the "Wedge" heads, when the plugs went through the Rocker covers, they started with the Hemi marketing. At the end of the day they are just a Splayed valve wedge head, like the Hemi 99 heads.
 Nothing HEMI about what I see except the word on the valve covers.
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