Can fox lake port NPI heads?

98blackstallion

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#1

• Apr 22, 2005

• #1

I couldnt find anything on there site about them being able to port NPI heads....can someone help me?

 

D

Dog bite

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Apr 22, 2005

#2

• Apr 22, 2005

• #2

Porting

Usually, porting is porting. If they can port one head and have the "proper" instruments, flow bench and know how, there shouldn't be a problem.

PI and NPI heads are not different enough to restrain them from porting either one.

 

mogs01gt

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#3

• Apr 22, 2005

• #3

Yes they can. They can port any head, I saw them working on a tractor engine head.

 

98blackstallion

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#4

• Apr 22, 2005

• #4

alright thats cool cause i want mine ported...so that way my compression doest get to high and i might be able to S/c the motor later without worry about having to high compression..

 

1992 2.3LX

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#5

• Apr 22, 2005

• #5

how much would it cost to get heads ported?

 

D

Dog bite

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#6

• Apr 22, 2005

• #6

Compression?

I'm not sure porting NPI heads will lower compression though.

Usually, the air passage way is ported, not the cylinder wall or area where the valves are... With PI heads, swirl dams can be cut down to bring the compression back to "normal" when swaped on pre-99 2Vs.

 

mogs01gt

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#7

• Apr 22, 2005

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it would only effect compression if they touch the combustion chambers and you would have to specify that you want that done.

 

1992 2.3LX

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#8

• Apr 22, 2005

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i believe he is saying he would like to get his NPI head ported instead of doing a PI swap because the PI swap will raise compression and porting the NPI's will not.

 

98blackstallion

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#9

• Apr 22, 2005

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1992 2.3LX,

you are correct sir....thats my reasoning

 

Gearbanger 101

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#10

• Apr 22, 2005

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And very sound reasoning it is.

 

98blackstallion

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#11

• Apr 22, 2005

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i look at it like this: If i was to do the PI head swap that cost somewhere around $700-800 to do it right but it raises my compression to like 10.5:1 and then i can say byebye to the thought of a blower. OK i can take my NPI heads and have them ported and add a PI intake for not much more and i can still be able to supercharger the car without worries. From what I have heard is that PI and NPI heads flow close to the same stock so why not just ported the NPI heads and still be able to supercharger without ripping the motor down and sticking in different pistons...I mean dont get my wrong thats a good idea but when I set my budget I didnt want to have to break the motor down but instead push it close to its limits while maintaining a safe air fuel mixture and preventing detonation....I think I have set a good reasoning for doing this..

 

Gearbanger 101

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#12

• Apr 22, 2005

• #12

Yep and not to mention your ported NPI's will also outflow stock PI's and are able to support more than enough power to overwhelm the stock internals. So a head flowing higher than that is unnecessary anyway.

 

1992 2.3LX

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#13

• Apr 22, 2005

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don't forget the PI Cams!

 

DropTopPony

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#14

• Apr 22, 2005

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check out steenracing.com they have a package for npi heads. and a good reputation.

 

Jd200287gt

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#15

• Apr 22, 2005

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PI cams are hardly better than NPI cams, get VT's while youre in there and youre set

 

Mike97gt

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#16

• Apr 23, 2005

• #16

98blackstallion said:

I couldnt find anything on there site about them being able to port NPI heads....can someone help me?

Click to expand...

why port the non pi's the only thing i can think of is maybe you don't want the added compression with the PI heads.. if this is not a problem.. get a set of PI's and port those..

 

Gearbanger 101

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#17

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MikeZ28 said:

why port the non pi's the only thing i can think of is maybe you don't want the added compression with the PI heads.. if this is not a problem.. get a set of PI's and port those..

Click to expand...

That's exactly why he doesn't want to go with the PI heads. Besides....ported NPI's will flow more than enough for his set up anyway....so why drop another $600-700 on a set of PI's when it's unessary? Bigger isn't always better dude.

 

Mike97gt

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#18

• Apr 23, 2005

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Gearbanger 101 said:

That's exactly why he doesn't want to go with the PI heads. Besides....ported NPI's will flow more than enough for his set up anyway....so why drop another $600-700 on a set of PI's when it's unessary? Bigger isn't always better dude.

Click to expand...

bigger is'nt always better is true depending on what he wants from the car... the PI head is a better starting point.. but after i posted i read that he wants too supercharge the car at some point.. so yeah i agree he should go with a good port job on the stock heads.. well that is if he keeps the stock pistons...

but if looking for the best performance wise without a blower.. i would get a set of PI's port those and get cams.. not PI cams... atleast VT stage 2's

but if i was going with a blower.. i would port the NPI heads (keep the compression down with the stock pistons) and go with a set of cams for a blower motor..

 

98blackstallion

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Apr 24, 2005

#19

• Apr 24, 2005

• #19

yep i am gonna stick with the stock pistons and internals and I am gonna shoot for 400 rwhp