The raw data is up on the Synapse Engineering forum www.synapseengineering.com/smf

We know that the Synchronic BOVs don't leak. We were actually expecting a boost gain, so to see the 0.7 psi drop and make more power was a surprise. My hypothesis is the following: A leaky BOV unloads the compressor, overspinning it, which brings it into a non-ideal part of the compressor map. This decrease in efficiency leads to backpressure and lower compressor efficiency. Specifically, the increase in backpressure is dropping the engine's scavenging rate on the exhaust stroke. And that is where you see the 25 hp delta between a leaky and non-leaky BOV.

i wasnt asking a question i was wanting them to explain how they made an increase

If the old BOV's were not holding boost then of course your going to see an increase. Case closed

the only way i would think that you would gain anything by swapping them is if the old ones were releasing boost under pressure

It was only at 7 lbs of boost, I think that you would've been in the 700 range at 12 psi of boost

not to impressed for all the money to get those numbers maybe its just me but. Was looking for 700-750 hp

that's at the wheels, 530RWHP is like 610HP at the crank

woohoo, we made 25 hp with just the BOV. We were expecting zero gain, doesn't sound weak to me at all.

nice bov but it seems weak for a turbo vette