Identifying PI heads
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Junior User
Joined: Feb 2006
Posts: 77
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From: SLC, UT
Identifying PI heads
I bought my 99' 250 with approx 130K on it. From what I can tell, the trans has been removed and other alterations have been made prior to my ownership. The previous owner was a Captian in the AF and seemed to take really good care of it.
I work at a large dealer and have looked under the hoods of several 01-04 V10s and the ports on the intake manifold look exactly the same as mine. When I was building mustangs, the improved heads had a more retagonal port than non-pi heads.
My truck runs really well for a less-than desireable 99' V10. I was wondering if the engine or heads could have possibly been already replaced.
Any there any numbers or markings to look for?
TIA
Marcus
I work at a large dealer and have looked under the hoods of several 01-04 V10s and the ports on the intake manifold look exactly the same as mine. When I was building mustangs, the improved heads had a more retagonal port than non-pi heads.
My truck runs really well for a less-than desireable 99' V10. I was wondering if the engine or heads could have possibly been already replaced.
Any there any numbers or markings to look for?
TIA
Marcus
Mountain Pass
Joined: May 2001
Posts: 246
Likes: 0
From: MT
If you look up that the head from between the fender and the tire you should see the PI casting mark by the front exhaust port if it is a PI..I was looking on the pass. side of motor..
Last edited by fordfan428; Aug 26, 2007 at 02:48 PM.
FTE Leadership Emeritus
Joined: Jul 2002
Posts: 42,561
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From: Long Island USA
The PI heads for the V10 aren't the same as the PI heads for the 4.6/5.4 - I don't think the intake port shape changed at all like the V8's...
The trick is, low-RPM flow... The PI heads for the 4.6/5.4 DO loose some low-end according to those who've done the conversion.
I figure Ford left the V10's ports the same shape/size to keep the low-end torque.
The trick is, low-RPM flow... The PI heads for the 4.6/5.4 DO loose some low-end according to those who've done the conversion.
I figure Ford left the V10's ports the same shape/size to keep the low-end torque.
Mountain Pass
Joined: Feb 2018
Posts: 130
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From: Usa
The heads do change, 97-99 are none-PI and are the same as the 4.6 and 5.4.
The 00-04 are PI and are also the same as the 4.6 and 5.4 PI
(I believe theres a split year between the NPI&PI)
The intake manifold is also different.
The 00-04 are PI and are also the same as the 4.6 and 5.4 PI
(I believe theres a split year between the NPI&PI)
The intake manifold is also different.
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46, 68, edition, ford, fordcasting, head, heads, identifcation, identify, identifying, improved, lightning, numbers, performance, pi, v8
