going to change out my stock cam to a zz4 this winter and according to dd i'd gain approx 40 hp at 6000 rpm by retarding the cam 4 deg.is this possable?i' mean 40hp over the zz4 straight up.not 40 more than my stock cam
anyone know on dd is the lobe center the same as the lobe seperation?
my setup now is
350tpi
paxton sc 5lb boost
afr 190's
9.5-1 comp
slp exaust and 1-3/4 headers
edelbrock manifold
asm ltr's
holly 52mmtb
msd6al-btm

anyone have any info or experiance max rpm of this combo is 6000
should i build according to dd or should i install the cam straight up?
thanks
pete

 

Desktop Dyno is a ROUGH GUIDE....and on alot of engine builds it can come pretty close to actual...


The BIG ERROR is with cams...


Change the lifter type to hydraulic FLAT TAPPET, even on ROLLER cams....watch the numbers drop...these are more realistic.

Guy on one of my email lists built the exac engine he put together on paper....it made less HP than DD2000 said....still VERY STRONG...once he changed the lifters to flat tappet in the program, the numbers were within 2-5 percent of ACTUAL HP and torque measured on a flywheel dyno.



HTH, YMMV

 

When you change the lifter type the peak #'s become more accurate but the curves aren't realistic.