Hi,
Thanks for the nice words, the "normal" (non blast) driveability is great, a shame for VW that the did not cut valve pockets in the pistons or deepening the valve seats (as i did) to be able to put in a "real" camshaft. As could be seen in the dyno plots, i have now 20 Nm - 50 Nm and 8 kW - 20 kW more in the rev range 1000 rpm - 3000 rpm, which is mainly related to the camshaft in my eyes. And in fact this not a suprise for me, because our idi engine did not need a specific swirl due to valve geometrie and flow speeds, as it makes all that neccessary pre-combustion work in the swirl chamber, so in my eyes the valves has only one thing to ensure: to max. out the possible flow.
In my eyes it is the logical consequence, if you take the efficiency penalty from the swirl chamber, you should also take the advance from them, that you could take the biggest valves (only limited due to mechanical and geometric limitations) and try to use the higher temps in the swirl chamber for higher revs.
To come back to your question, the off-boost performace is improved to. The new "drive feel" appeals me more with every km i have driven (actual ~ 1300 km) it. It is quite differend as before, every minimal throttle move brings a tiny slighty boost increase at low idle, so the engines allways feels motivated to give more. For sure it is everything else than a K14 setup, whichs warps you through lower revs with instand response.
It feels a bit less spectacular, as the "boost hammer" came at ~ 1,0 bar instead of ~ 0,5 bar (with smaller turbos), so you allready have say 120 hp when it comes really hard. But as i say before and could be seen in the dyno plot, i have allways and anywhere more power than before.
What is really really nice now is the "non cruising mode", and is not only due to the improved power figures it is due to the improved shape of the power curve. I can stay as long as i wand in every gear through a corner and it still is capable to pulls me out of the corner harder and harder as the power allways increase. We have had a small blast yesterday (a friend with a 330 D (E46) and me) and i really like the way how it works know, specially whith the open screamer pipe, whichs gaves a great secondary acoustic signal, just like an acoustic redline flash.
But there was also some poor moments yesterday, i have bought a 5,0 V10 TDI intake whichs looks exactly how i wand my intake manifold to look:
The ports has the correct geoemtric in general, but the support bolts are not on the right place. I also needs ~ 110 mm lateral place and i have only ~85 mm between the cylinder head and the compressor housing. How ever i have hoped to find a solution by unsing the support flange from a 1Y manifold:
In fact i must cuted the V10 manifold, so that it is mainly only a pipe at the end. As result i notice that the runners than have a smaller axial distance (the two inner runner are connected there) so they will than not fit with the 1Y part. Pherhaps i could weld the two 1Y parts together in a differnd angle, so that they will fit with my turbo setup, but than i also have change the angle on the top end of the manifold. At this burning of money depressed me yesterday, i did not have make any more pictures and have decided to bold on a stock 1.9 TDI manifold (the version with seperate runners) as first step.
Best Regards
Alleslowbuged
Topic: Golf II GTD with 1.9 AAZ engine --- EVO II (Read 151854 times)
