On the subject of transmission losses, the calculation should be :
wheel bhp / 0.85 = guesstimated flywheel bhp, not
wheel bhp x 1.15 = guesstimated flywheel bhp.
Secondly, I take Yank dynoplots with a mountain of salt - to say they're prone to over-exaggeration is an understatement.
All that aside, what kind of cylinder head is on those other E-05 equipped cars? Small port like the
Ibiza or large port?
If I've understood correctly everything that I've read on this forum, then to obtain a given flow in CFM or lbs/min on a small port head you will require a higher boost pressure than you would on a large port head, all else being equal.
It'd be worth seeing a compressor map from the E-05 to see how much more boost pressure you can run before you're out of the compressor efficiency window which starts to produce more heat.
Add in whatever difference there is between
Ibiza & other 1.8T intercoolers in ability to cope with heat produced by the extra boost, plus I suspect that pre-turbine backpressure will need to be reduced via bigger downpipe/sports cat/exhaust as you'll need to to spool the bigger compressor up as quickly as possible to minimize lag. The E-05 uses the K0-3 turbine - is that correct?
In short, what I'm saying is that I would expect the
Ibiza to produce lower outputs than the equivalent large port version.
Here's an article with some turbo sizing theory - note how he demonstrates how the K0-3 cannot produce 20psi at 7000RPM.
Try it with the figures for a K0-3 running a peak 20psi at peak torque, say 4000RPM then google for K0-3 compressor map.
http://articles.domestictunerz.com/article.php?ID=135
