W2 408 sb mopar on the dyno

moper said

Those BSFCs are fantastic. The Ultras are that good (shocked a little...lol)?
I like the fact the heads are not heavilly ported - what were the flow figures for .300-.500 lift? It seems like every set of W2s that gets used gets "full race porting" and they really don't need too much to make great numbers.
Nice work.

Click to expand...

Flow was real good at lower lifts...this is a big reason why I like wider lca's with more stroke on an engine that will rpm.
Plus I needed to keep the idle in check and I believe wider lca's work better than shorter duration when it comes to compromising idle/street drivability vs. power.
JRob, almost every customer I deal with needs a decent idle and really wants good street manners so it becomes a delicate balancing act to make power and drivability.

If I had built this for myself, I would have used a cam more like 260-266, .720 lift or more and still had a 112lca. For big topend power these engines with decent heads like wider lca's.
Now if it's a smaller cid...I go the other way with the lca.