96blackgt54 Posted June 17, 2017 Report Share Posted June 17, 2017 (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 June 17, 2017 by 96blackgt54 Link to comment Share on other sites More sharing options...
96blackgt54 Posted June 17, 2017 Author Report Share Posted June 17, 2017 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) Link to comment Share on other sites More sharing options...
96blackgt54 Posted June 17, 2017 Author Report Share Posted June 17, 2017 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. Link to comment Share on other sites More sharing options...
96blackgt54 Posted June 17, 2017 Author Report Share Posted June 17, 2017 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! Link to comment Share on other sites More sharing options...
96blackgt54 Posted June 17, 2017 Author Report Share Posted June 17, 2017 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! Link to comment Share on other sites More sharing options...
