After the pi swap

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Bridges77

New Member

Dec 6, 2020

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Dec 6, 2020

#1

• Dec 6, 2020

• #1

I have a 98 Gt with stock npi block. I have pi cams and intake. Also c/a, stock headers, off road h-pipe, catback and 4:11 rear end gears. What should I do next for more power? With the list above it pulls really nice but now it’s slow to me, any suggestions? A power adder is down the road.
thanks

 

Mustang5L5

That is…until I whipped out my Bissell

Mod Dude

Feb 18, 2001

43,218

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Massachusetts

Dec 6, 2020

#2

• Dec 6, 2020

• #2

Did you do the PI heads?

Aftermarket plenum and throttle body would be a good addition as well

 

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Bridges77

New Member

Dec 6, 2020

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Dec 6, 2020

#3

• Dec 6, 2020

• #3

No,stock npi’s. Is it worth doing the heads too? Or should I get custom cams for the npi’s?

 

Mustang5L5

That is…until I whipped out my Bissell

Mod Dude

Feb 18, 2001

43,218

17,901

224

Massachusetts

Dec 6, 2020

#4

• Dec 6, 2020

• #4

Well, it depends on your long term goals. If you were sticking with N/A, the PI heads would give you a big bump in HP, but it would also bunp your CR up to around 10.5:1 meaning you now need 91+ octane and might put a dent in your forced induction plans.

full PI swap, (heads, cam, intake) plus exhaust, plenum and TB would get you in the 290-310HP crank range. Aftermarket cams in those heads might get you a little bit more.

 

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Bridges77

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Dec 6, 2020

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Dec 6, 2020

#5

• Dec 6, 2020

• #5

Once I swapped the to pi cams and intake 411 gears and exhaust it really woke up. Just looking for a little more power.

 

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Bridges77

New Member

Dec 6, 2020

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Dec 6, 2020

#6

• Dec 6, 2020

• #6

Not sure which direction to go