I keep trying to persuade him to wire in the solenoid but hes having non of it.Originally Posted by Scoff
It's an interesting comparison Ashy's vs my Trophy, when Scoff was mapping it I popped up for a catch up with both him and Ashy and I was shocked when it made exactly the same as mine did at 1 bar, we both made 340bhp ish. I've always been led to believe that the bigger the turbo the less boost required for more powerI must admit that the GT28 .86 housing flows exactly the same as the GT30 .63 housing so that could account for some of it but I honestly expected the 60mm turbine wheel and the tubular manifold to prove it's worth on Ashy's.
As it's all unfolding I probably should of just stuck with my logg mani and fitted a stronger box, admittedly Ashys seems to flow better at the top end as like Tutuur points out mine starts to drop off whilst Ashys was begging for more boostIt makes me wonder about dyno tuning as Paul @ RStuning has built several megane forged lumps on GTX3071/76 and there all making 450bhp @ 1.5 bar which using Scoffs conversion would make it a 180 bhp N/a lump which is unlikely due to the lower comp.
Matt, Andrew Cooke had me looking at Evo cams (kelfords) and comparing things like where peak power came in, what rpm was needed, how crap lower rpm was and idling issues, overlap etc.... we both came to the same conclusion that what I'm using was the best compromie. I have a spare set you can use but, obviously I'm using VVT and your not so your limited on the inlet cam choice. I would probably get a 182/197 head.
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At those power levels the smaller turbo in your case is still flowing adequate, so there is next to no advantage from ashy's larger turbine, etc. Raise the boost to 1.7 bar and it's a different story.
