Welcome to SN95Source.com

Register now to gain access to all of our features. Once registered and logged in, you will be able to contribute to this site by submitting your own content or replying to existing content. You'll be able to customize your profile, receive reputation points as a reward for submitting content, while also communicating with other members via your own private inbox, plus much more! This message will be removed once you have signed in.

Sign in to follow this  
Followers 0
96blackgt54

Npi pi cam specs duration lift

Posted (edited)

Figured id post some of my ramblings!

 

Here is a small peak into the factory modular cam world. What most of us always thought were 2 types of modular cams, npi & pi, has turned out to not be the case.

 

Pi cams both passenger side

XL3F-6251-A7C

XL3E-6C255-B7B

 

intake/exhaust

at .006 valve lift

246°/250°

at .050 lift

200°/208°

 

Max lift surprisingly .480" 

I always told the pi cams had .050" more lift....oh well

Lobe seperation angle 116°

Edited by 96blackgt54
0

Share this post


Link to post
Share on other sites

Npi cams

Both cams are driver side

F2AE-6250-AA

F65E-6250-AA(tool marking curpted any legibility. This cam did come out of a 99 crown vic) *corrected*

 

F2AE

Intake/exhaust

at .006 lift

266°/242°

at .050

210°/200°

 

Lobe separation angle is 113°

 

F65E(99 vic)

Intake/exhaust

at .006

258°/256°

at .050

210°/200°

 

Max lift .450 both cams

Lobe seperation 116° F6 (99vic)

0

Share this post


Link to post
Share on other sites

Check this out!

I just mapped a cam I pulled out of a npi 5.4l head.....pretty interesting!

 

Passenger side cam

 

F65E-6251-BA

.475" / .460" max lift

Intake / exhaust

.006" lift

272° / 266° 

.050" lift

224° / 210°

 

114° lsa (lobe seperation angle)

 

This cam is about as close to a compcam stage 1 as youll get. The compcam has 20° more exhaust duration at .050" and lift values are .550" both lobes.

 

Compared to a pi cam this npi 5.4l cam offers alot more! These cams are dime a dozen at junkyards. Probably pick up for less than $50.

0

Share this post


Link to post
Share on other sites

Mustsng pi cam

 

XL3E-6C255-BB (could be B8 or 8B. Light stamping)

 

Intake / Exhaust

.006" lift

244° / 260°

.050" lift

220° / 210°

 

.495" / .540" max lift

 

LSA 113°

 

Check it out! The exhaust has more lift! Explains why pi cams are a good upgrade to npi heads. Stock npi head exhaust flow is pitiful, coupled with npi cam, even more pitiful. Throw in the mix fast bleed lasher....even worse!

0

Share this post


Link to post
Share on other sites

So its settled! There are more factory cam offerings than we initially thought. Instead of a guess that 2 makes of cams were all that was available, npi and pi, Ford actually helped us out and blessed us diehards with a selection. Thank you Ford!

 

Now, im still curious if matching cam part #'s are ground equally.

The 2 seperate #'s at the thread beginning were in fact ground the same, but to show consistency, 2 of the same is needed.

 

Also, with all the cams I have, im uncertain if any were a match from the same engine. Luckily I just aquired an exploder 4.6l and will be pulling both cams for measuring!

0

Share this post


Link to post
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!


Register a new account

Sign in

Already have an account? Sign in here.


Sign In Now
Sign in to follow this  
Followers 0

  • Recently Browsing   0 members

    No registered users viewing this page.