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Josh, did you ever find out about the block you took out of the black 951 on why the compression loss????
Hey Steve - When I took out the pistons the rings were frozen in. Cylinder walls looked fine. All I can figure it that the engine got really hot somehow? It is a stumper for sure.
Its not stock - it has the banjo bolt mod in place for both tests. The banjo bolt mod is a restriction in the wastegate signal line – it raises the boost – usually to somewhere around 1 bar…but some times more…
I'm going to have to defend Autothority here. So many people give them a bad name because of posts like this, when really they are still more advanced then some of the chip combinations for sale today (Lindseys for instance).
If you were seeing more than .95 bar, Autothority had already included in the kit 2 drill bits so that you could drill the banjo bolt orifice larger if needed. I ran their stage 2 chips/banjo bolt with 2 shims in my wastegate and never had any boost spikes whatsoever as evidenced by my datalogs. And I got to keep the factory electronic boost control.
02-16-2010, 11:44 AM
