the TYPE of cam not just the lift/durration,LCA MATTERS

[grumpyvette]

I stoled this off a differant site, its interesting reading...

 

"a solid lifter flat tappet cam with 6 - 8 degrees more duration @ 0.050" than a hydraulic lifter flat tappet cam ground on the same LSA will have similar manifold vacuum and idle characteristics to the hydraulic cam. It will also have a similar powerband at low and mid-range, but will have a discernable power advantage in the higher revs after the hydraulic cam begins to fall off. At least that's been my experience. .... I prefer a solid cam" (if it will work with the EFI sensors).

 

"There was an article a few years ago where this theory was tested on a 440 Mopar engine. I found a copy on the internet this morning, but the pages are out of sequence (goes 28, 30, 29)...... So you'll need to read it by correct page order for it to make any sense......"

 

http://www.compcams.com/Community/Articles/Details.asp?ID=1088792917

 

http://www.idavette.net/hib/camcon.htm

 

 

http://airflowresearch.com/articles/article002/A2-P1.htm

 

In this tested engine, both cams were ground on 110 degree LSA and had fairly close lift after subtracting for the solid cam's valve lash. The solid cam had 8 degrees more duration @ 0.050" on intake and 10 degrees more duration on exhaust. It was an interesting comparison.

 

Best regards,

 

Harry"

 

the comparison between the flat tappet and roller lifters is also of interest, but be aware there ARE trade offs, a solid roller cam won,t generally get the same lifespan as a hydrolic roller because of several factors like much higher average spring pressures and faster ramp rates

 

keep in mind the rear gearing, stall speed on the converter, compression ratio, displacement and intake and exhaust sellected must match the cam sellected and without decent heads youll be seriously restrivcting power potential.

 

 

 

 

http://www.oregoncamshaft.com/cam-basics.html

 

http://www.symuli.com/vw/camp1.html

 

http://www.symuli.com/vw/camp2.html

 

http://www.auto-ware.com/combust_bytes/camspecs.html

 

 

http://www.ridgenet.net/~biesiade/camdegree.htm

 

http://www.mousemotor.com/cb_1.htm