Hello from the UK

[BenR]

i use EA pro 3.3, PFA pro and the entire Performance trends package......very expensive to hold all the licences.

And also LES.

However, fiddling with simuation software is one thing, and it is a great tool, but the time it takes to model an engine accurately you could of built one..........and in which case you would of done anyway.

I still prefer to design engine specs mentally, those who can tend to be better off as there are things you cant model in engines software.

I dont run 20v 4age's, i dont find then that good to work with and their performance is limited, horrible design flaws between black and silver tops.

A carbon airbox to surround the ITB's?
As for runner lengths in these applications, i find that you typically cannot get enough at all due to space limitations, everytime i start my basis with going for as long as i can in the space, then twiddle it on the dyno, trial and error for tuned lengths is better than calculating them IMO.