P.I. questions

XXBULLETSXX

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Aug 19, 2005

#1

• Aug 19, 2005

• #1

Someone explain to me what a P.I. intake and heads are. And what does the P.I. stand for? I’m trying to figure this out and if I’m missing out on something that I should be doing.
I feel like such a idiot asking this question but I can’t stand not knowing.

 

K

Kilgore Trout

Fried or Broiled ?

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#2

• Aug 19, 2005

• #2

PI stands for performance improvement.

99+ Mustangs have PI heads, intake, and cams. Anyone with a mod motor that is not PI (pre 99) should seriously consider this expensive and time consuming mod.

 

XXBULLETSXX

New Member

Mar 30, 2005

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Kannapolis, NC

Aug 19, 2005

#3

• Aug 19, 2005

• #3

Gotcha! Mine is a 2000 4.6 so I guess I'm in the clear.

Thanks for the help that was driving me nuts

 

nex2nutin

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Aug 19, 2005

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Aug 19, 2005

#4

• Aug 19, 2005

• #4

I have a 98 GT stock, what gains could i expect from a PI upgrade intake and heads? I just got my first stang and just want to beef it up a little for now.

Thanks

 

M

mustangdave

My rearend needs a stud and two nuts.

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Aug 20, 2005

#5

• Aug 20, 2005

• #5

Not sure what the specs were for 98 but I think they jumped to 260 h.p. for 99.

 

Gearbanger 101

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#6

• Aug 20, 2005

• #6

nex2nutin said:

I have a 98 GT stock, what gains could i expect from a PI upgrade intake and heads? I just got my first stang and just want to beef it up a little for now.

Thanks

Click to expand...

Add about another 5-6hp over a stock '99, since swapping over the PI gear onto your '98 will up the compression from the stock 9:1 range to around 10.4:1. And count on having to run premium fuel all of the time too.

 

DropTopPony

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#7

• Aug 20, 2005

• #7

mustangdave said:

Not sure what the specs were for 98 but I think they jumped to 260 h.p. for 99.

Click to expand...

then why post in a mod motor forum?

 

DropTopPony

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#8

• Aug 20, 2005

• #8

nex2nutin said:

I have a 98 GT stock, what gains could i expect from a PI upgrade intake and heads? I just got my first stang and just want to beef it up a little for now.

Thanks

Click to expand...

you will get @50 rwhp gain over the NPI parts. it is a nice gain and will feel like a new car.

 

Gearbanger 101

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#9

• Aug 20, 2005

• #9

droptopponynj said:

you will get @50 rwhp gain over the NPI parts. it is a nice gain and will feel like a new car.

Click to expand...

I think you mean 50-flywheel horsepower, right?

 

tomustang

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#10

• Aug 20, 2005

• #10

hey guys

 

DropTopPony

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#11

• Aug 20, 2005

• #11

Gearbanger 101 said:

I think you mean 50-flywheel horsepower, right?

Click to expand...

nope, the 3 guys i know who have dyno'd after the pi swap were all in the 240-250 rwhp range.. all gained a minimum of 50rwhp. One guy gained over 60rwhp. Anyone who has had there NPI dyno'd knows they only get between 175 to 190 on avg. I have yet to dyno mine but i'm sure i'll be in the 250 rwhp range with my boltons. I dyno's at 178 NPI with exhaust.

 

tomustang

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#12

• Aug 20, 2005

• #12

my SOTP meter read 65rwhp after my swap

 

DropTopPony

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#13

• Aug 20, 2005

• #13

tomustang said:

my SOTP meter read 65rwhp after my swap

Click to expand...

is that with boxers or briefs on? cause boxers can get bunched up and give false reading.

 

Gearbanger 101

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#14

• Aug 20, 2005

• #14

droptopponynj said:

nope, the 3 guys i know who have dyno'd after the pi swap were all in the 240-250 rwhp range.. all gained a minimum of 50rwhp. One guy gained over 60rwhp. Anyone who has had there NPI dyno'd knows they only get between 175 to 190 on avg. I have yet to dyno mine but i'm sure i'll be in the 250 rwhp range with my boltons. I dyno's at 178 NPI with exhaust.

Click to expand...

Hmmm, interesting. I wouldn't have guessed that the slight bump in compression would give a '98 owner a 20-25fwhp jump over a stock '99-'04?