Originally Posted by Dino 
>>It needs bigger valves. The Valves on the VE are smaller than the DE.>>
i cannot imagine that this is the reason. If so it would not make good topend power? Or do you have concrete before-after measurements?
Even on 9 psi i made only 290NM (219lbft), but 337NM with my DET on same boost. So there is constantly a torque lack of appr. 18% over the det with same turbo.
I think its the Short runner intake (runners are only 60% of the DET-runner-length). I remember changing the intake manifold of my BMW E36 328i to the earlier model and shorter 325i-manifold. The car felt completely different. It lost 10% torque and gained 5% topendpower.
Problem is that beside mazworx there is nothing on the market, and the mazworx-intake looks very hardcore and nobody nows if it really brings the result i want. DET torque and VE TOPend :-)
aftermarket manifold? Yikes, that could be an issue. See, that's the biggest thing different between the cars is the intake manifold. The VVL will hold more power through the top end, and the head flows better, but if your runners are too small you will lose power everywhere until you hit its sweet spot. That could be 11K rpm for all we know. The turbo won't like running that high lol. What if you could try a different manifold?
I have noticed the diff in torque in the DE and the VE, but when 6000rpm hits the VVL seems to do a lot better.
Exhaust valves are smaller, but it is negligible. The easiest fix is to get the most free-flowing exhaust as possible. The VE really likes big exhaust housings, and open downpipe
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