Is this cam a stupid idea?
Piecing together a carbed 5.9 magnum build with EQ heads going to cut for 2.02 valves and do a little porting. Hoping to use stock crank and rods.
I got this cam second hand for cheap and wondering if its a bad choice.
ERSON E994001
Grind RH 294/365
RH 302/365
110 Lobe separation 78 Overlap
Intake opens 37 closes 77
Exhaust opens 41 closes 81
Lift (1.5) 0.547 0.547
Duration @.050 246/252
Spring 130 closed 310-320 open
Ran the wallace DCR calculator and at 10.5:1 static it spits out 7.50 dynamic, which seems pretty soft. Is this cam a stupid idea? Finally got some money to dump into my Dart and looking for a nasty pump gas street strip motor, backed by either 3.09 low 4spd or a 46rh.
I think something is off, I can't get to 78* overlap with your numbers. and how the heck you came up with 7.5Dcr at 3100 ft is beyond me. Hang on I got the 78*; 294/302/110 And I see how you could get 7.5, with an ICA of 69*(in at 102) and Scr of 9.8.....
What you didn't mention is the 135psi cylinder pressure, yeah I can see that working with the 3.09 low and 3.91s or better; 3.09x3.91=12.08...
Isn't that what
YR runs; 2.66x4.56 =12.13 starter, and he loves it. But I don't recall his tire size. So by itself 12.13/12.08 isn't all that helpful.
But the problem comes, in street mode, when you hit second gear; cuz it's still 1.92 ratio, and your Rs drop to 62%, and with just 135psi...... well, you get the picture.
For the track,I would build the engine to plan on safely buzzing first gear a lil past "normal", and into "wasted space",lol, cuz if you short shift second and find yourself down at 3600, well you are gonna feel that 135psi as a big fat soft spot. The other two shifts are better at .729 and .714
