Performance Increased? (PI)?
Thread Starter
Joined: Aug 2006
Posts: 47
From: California
Performance Increased? (PI)? Now with additional questions about intake...
I know it's a dumb quest, but I've searched all over the place and the engine either gives me a bunch of unneeded results or it says that my term is used too often or is too short.
How would I know if my mustang has a PI motor? I have a 99 GT and I need a new intake. I know for a fact that the intake I bought is PI.
Thanks for helping out
How would I know if my mustang has a PI motor? I have a 99 GT and I need a new intake. I know for a fact that the intake I bought is PI.
Thanks for helping out
Last edited by MustangWill; Dec 13, 2008 at 03:58 AM. Reason: Topic name change
2nd Gear Member
Joined: Jun 2008
Posts: 350
From: ohio
I know it's a dumb quest, but I've searched all over the place and the engine either gives me a bunch of unneeded results or it says that my term is used too often or is too short.
How would I know if my mustang has a PI motor? I have a 99 GT and I need a new intake. I know for a fact that the intake I bought is PI.
Thanks for helping out
How would I know if my mustang has a PI motor? I have a 99 GT and I need a new intake. I know for a fact that the intake I bought is PI.
Thanks for helping out
2010 Blue Ball Award Recipient
Joined: Dec 2004
Posts: 7,907
From: Eskimo Village, Indiana *No Igloo*
Performance Improved
In '99 Ford redesigned the heads and intake manifold, and changed the cams a bit. Upped horsepower from 215-225 up to 260.
Quarter mile times dropped almost a full second according to some sources.
Both of you guys have PI cars obviously since they became equipment starting on the '99 Mustang. Some of the F-150's/Grand Marquis/Crown Vics/Explorers didn't get them until later.
In '99 Ford redesigned the heads and intake manifold, and changed the cams a bit. Upped horsepower from 215-225 up to 260.
Quarter mile times dropped almost a full second according to some sources.
Both of you guys have PI cars obviously since they became equipment starting on the '99 Mustang. Some of the F-150's/Grand Marquis/Crown Vics/Explorers didn't get them until later.
1st Gear Member
Joined: Dec 2007
Posts: 112
From: Washington
In 99 they changed over to the PI engines in the mustangs.
Intake manifold was vastly improved, with higher flow and almost dbl the runner length
The cams were vastly improved
The pistons had a changed shape, to go with the reshaped cylinders on the new heads.
The heads were vastly improved, with longer intake runners, larger exhaust ports, different shaped intake ports, different shaped cylinders, and bigger valves.
Mustang HP went from 215 to 260 stock
I've seen PI engines on 99+ mustangs, Crown vics, and I believe I've heard of them in explorers as well.
Intake manifold was vastly improved, with higher flow and almost dbl the runner length
The cams were vastly improved
The pistons had a changed shape, to go with the reshaped cylinders on the new heads.
The heads were vastly improved, with longer intake runners, larger exhaust ports, different shaped intake ports, different shaped cylinders, and bigger valves.
Mustang HP went from 215 to 260 stock
I've seen PI engines on 99+ mustangs, Crown vics, and I believe I've heard of them in explorers as well.
Thread Starter
Joined: Aug 2006
Posts: 47
From: California
Thanks for the info. I guess I won't have to worry about any other hardware for the new intake outside of gaskets and possibly replacing the thermostat. It was hard to find info about PI and NPI on the internet because I just kept getting aftermarket parts and stuff.
Thanks for clearing it all up, 72MachOne99GT.
Thanks for clearing it all up, 72MachOne99GT.
Underboss
Joined: Jan 2006
Posts: 20,272
From: Helaware