well, again I must give props to these guys for doing this, but I must also re-iterate that everything is sized wrong.

Look at the dyno plot, it clearly indicates that the turbo is too large. Boost threshold is all the way up at ~4400 rpm, and I'm guessing there is quite a bit of surging, given the range the turbo is being forced to operate in. The tq output nearly triples from 4400 to 4600 rpm, that's only a 200 rpm change to increase tq by ~175 lb-ft. The a/f ratio is all over too, hardly the ideal setup

I will give big props for the nice looking peak numbers, but that curve just sucks, and it is all because the parts being used are the WRONG SIZE. The plumbing length prolly isn't helping either, but is hardly the major factor here. The IC is also too large for the flow being used, I would expect that IC to be good on a ~400hp or so setup, but not this one.

It's all about balance.

bcphillips@peoplepc.com