DESKTOP Dyno numbers, that is. :-)

OK, so I have too much time on my hands. My wife complains that I'm obsessed with this 'stupid Ford engine' stuff. Maybe I am, but at least it's more educational/constructive than her online gaming... ;-p

Anyways, I've taken the liberty of modelling Tim Meyer's 400 build up the best I could in DynoSim (big brother to Desktop Dyno aka DD2K). I know these models are to be taken with a grain of salt (to say the least,) but it may give us an idea of what we'll see and (what-the-h**k) it's fun!

Assumptions I've made:
- 9.7 static compression
- Comp Cams XE268 (based on numbers from Tim's cam page)
- stock (and ported) Aussie head flow numbers from
http://web.archive.org/web/200208140...s/351heads.htm
- engine dyno'd with 600 cfm 4-bbl carb, small-tube headers and open exhaust.

manifold comparisons:
http://ozzello.punchdown.org/users/p...-manifolds.gif

Consider the Edelbrock to be a 'dual plane standard flow' (DP-STD), the Weiand as a 'dual-plane high-flow' (DP-HI), and the Holley to be a 'single-plane standard flow' (SP-STD). I know these may not match each of these intakes exactly, but those are the options available in Dynosim and it should give us an idea of the variations we might see.

so my guess is that it'll dyno over 450 ft-lbs from 2000-4000 rpm and ~350 hp @ 4500 rpm.

I also modelled the difference between stock (unported) and ported Aussie cylinder heads:
http://ozzello.punchdown.org/users/p...s-unported.gif

This seems to indicate that the head flow will be the limiting factor in this engine's potential in the upper rpm range. Wondering why Tim chose not to port? Granted, a truck motor might not run over 4000 rpm all the time, but porting sure makes a big difference up there, if we're to believe the models...

Cheers!