pi cams/intake on npi motor

fast97gt

Active Member

Jan 2, 2007

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Sep 7, 2009

#1

• Sep 7, 2009

• #1

well from what im reading on what ive found so far is that i will gain 35-40hp rwhp? all from swapping my npi cams and intake to pi cams and intake?thats amazing especially when ive got the parts chillin in the garage. now what im cofused with is the intake gaskets, which one to use and where to put the silicone? a link to a complete write up would be nice, but i gues hints and tips will work to. thanks to all.


THIS IS THE BEST SITE EVER.

 

98COBRA281

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Nov 24, 2007

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Port St. Lucie, Florida

Sep 7, 2009

#2

• Sep 7, 2009

• #2

i made 225rwhp, and 270rwtq with pi intake/cams running realy rich, i could om made 235-240rwhp if we leaned it up,

heres a pic, it needs to be RTV'ed on the driver side rear, and passenger side front

 

fast97gt

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Jan 2, 2007

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#3

• Sep 7, 2009

• #3

man thats a great pic thanks. dang if i had enough time i would port match the heads, if i did would i see an increase in tq maybe hp too?

 

98COBRA281

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Port St. Lucie, Florida

Sep 7, 2009

#4

• Sep 7, 2009

• #4

npi heads can be port matched to pi gaskets, you just have to be careful, because they get very thin when opened up that big.

here a pic of my NPI heads port matched to pi gaskets

 

fast97gt

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Jan 2, 2007

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Sep 7, 2009

#5

• Sep 7, 2009

• #5

did you see any noticeble gain from this or should i leave this alone till go forced induction?

 

98COBRA281

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Nov 24, 2007

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Sep 7, 2009

#6

• Sep 7, 2009

• #6

fast97gt said:

did you see any noticeble gain from this or should i leave this alone till go forced induction?

Click to expand...

well it did the head porting when i did my motor build, along with, cams, lt's higher compression, ect, and gained 85rwhp and 40ft lbs of tq

 

fast97gt

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#7

• Sep 7, 2009

• #7

is the higher compression due to the p&p? i fell like a newb askin this cause i didnt know if it did.

 

98COBRA281

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Nov 24, 2007

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Port St. Lucie, Florida

Sep 7, 2009

#8

• Sep 7, 2009

• #8

fast97gt said:

is the higher compression due to the p&p? i fell like a newb askin this cause i didnt know if it did.

Click to expand...

no i changed out pistons, im running mark 8 4v pistons with a 2.6cc dish, compared to the 11cc(i think) dish is stock npi pistons..

 

fast97gt

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#9

• Sep 7, 2009

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nice thinks a million. those are impressive times btw.

 

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dustang5398

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Jul 27, 2004

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Sep 9, 2009

#10

• Sep 9, 2009

• #10

when you get this swap done you might want to consider getting a good tune........ instead of swapping the cams w/ pi cams i would go ahead and get some comp 262 and put in there....... Don't go anything w/ a higher duration than that b/c you'll have ptv contact........ Unless you flycut the pistons........ I also don't think it's a good idea to run f/i w/ that compresion jump..... U'll need better pistons....... But thats if you swap to pi heads.

 

fast97gt

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Sep 9, 2009

#11

• Sep 9, 2009

• #11

ya i dont plan to run FI until i build another engine, but as for the cams; im gonna use the pi's for one its not worth what little hp gain over the pi cams especially for that kind of money to buy after market cams. i already have the intake heads and cams laying here. now that i mentioned the heads everyone is saying why not the heads too, well because im saving them for the motor im building. plan on getting them c-c p/p better springs etc., so i cant do that with them on the car, also with 2 young rugrats kickin round here, moola is kinda scarce right know.

 

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dustang5398

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Sep 10, 2009

#12

• Sep 10, 2009

• #12

ya your rite. The main power will come from the intake and cams...... Good luck w/ the install and take some pics to share w/ us>

 

LI98GTStang

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Sep 11, 2009

#13

• Sep 11, 2009

• #13

For me the PI cams and PI intake were worth between 20-25rwhp. I used NPI gaskets, which seal better for the coolant, but not well for the air intakes. I see most people use the PI gaskets.

 

fast97gt

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Sep 11, 2009

#14

• Sep 11, 2009

• #14

LI98GTStang said:

For me the PI cams and PI intake were worth between 20-25rwhp. I used NPI gaskets, which seal better for the coolant, but not well for the air intakes. I see most people use the PI gaskets.

Click to expand...

What I've read people were seein 30-40hp at the wheels, with the parts being free, I don't have any problems slapping 30-40hp on my stock except bolt on npi 4.6. Would you?


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TNell

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Apr 10, 2007

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Sep 11, 2009

#15

• Sep 11, 2009

• #15

there is a full writeup--actually probably more than one--plus an excellent article on cam timing over modulardepot. this is a good project and not too difficult if you research, plan ahead, and make sure have the necessary tools