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Originally Posted by FullRaceGeoff
 great post... too bad you dont drive a subaru, some of the clowns on nabisco could benefit from your explanations.
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I think I'd have to get more flat brimmed Ken Block hats to join that crowd... Plus I enjoy not trying to spin my turbo up with exhaust gasses that have travelled 7 ft by the time they hit the turbine.
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one more thing to consider: traditional IWG canisters are a boost actuated device whereas the traditional EWG are vacuum actuated devices. an External-WG is fully sealed on the "close" side, but leaks on the "open side". Conversely the 2-port turbosmart or forge actuators are exactly the opposite. They are fully sealed on the "open" side, but leak on the "close side" <<let me know if this makes sense??>> - the conclusion i drew from doing a ton of WG testing - was that an external WG (which has a leaky bottom port) would function similarly to a 2port vacuum actuated canister (with similarly leaky bottom port). long story short: I am suggesting that exh manifold backpressure is what opens the valve on a traditional EWG (considering the bottom port leaks down so much.).
I have turbosmart sending their latest variation of 2 port IWG to me to try out but I am still unsure if we can do exactly what we need, will be interestign to find out
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Makes sense on the IWG vs. EWG. I never had any luck with a 2 port IWG actuator, as the bottom port will usually leak so badly that you lose the delta P on that side of the actuator in a hurry.
I'm interested to see how the Turbosmart does. I do wish their IWG actuators were a bit more reasonably priced... they're near the price of an EWG...
BTW - I'm on the wait list for a couple of TS T4 7163 at Full-Race. It still looking like "who the hell knows" on the ETA?
Glad you're finding the time to post here occasionally, as it's nice to get lots of first hand experience chiming in.