No, you would get 0 taper... since you'll be getting 0 boost. The actuator keeps that flapper closed so you can build boost, then opens it when it's told to (by boost controller or factory BCS) to keep it from going above the set boost level. So if it stays open, you will not build boost.

Tony (once had to use a paper clip to hold on actuator arm when cotter pin broke)

 

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You're right! I should have qualified my hypothetical remark about wiring the WG open. All I really meant was that once the WG puck opens to 100% of its travel, the WGA is, for all practical purposes just a passive bystander. Once the valve is 100% lifted from its seat and boost taper or boost creep occur...the WGA has no effect on the phenomena. At this point of 100% lift, the WG puck..... might as well be wired open, because it ain´t doing anything.

As for the mechanical process of wiring the WG.......I have had a few relatively slow spooling turbos where we´ve had to wire the WG shut to get them to spool a bit faster by keeping the flapper valve wired onto the seat.

Then I had this John Myers built(the late NHRA Drag Bike champion), TE-50 turbo on a Buick Grand National, a turbo on which we just couldn´t control boost with only the stock configured integral WG, so we tried wiring the WG full open and it still spiked to 25 psi. (The TE-50 is a TO4-E hybrid turbo, using the much larger, H2 turbine wheel totally clipped and crammed into a fully hogged out .63 Garrett exhaust housing). Imagine a stock sized 16G compressor wheel combined with the new, much larger, FP LT turbine wheel. (High inertia-low back pressure)

So, next we tried a higher flowing, fully ported PTE .63 turbine housing with an extra large diameter WG flapper valve, and a max ported WG bypass port, and even then we still couldn´t get it to boost below 23 psi. Finally, we had to weld a second, larger Turbonetics DeltaGate onto the V6´s crossover pipe. And only in this manner, by using dual wastegates, could we finally control boost.

Well, I strayed far off topic, and discussed other cars from a different era....So, I apologize for my digresion. Guess I´m just getting old. But, yup, I have had a turbo that spooled to 25 psi instantly with the WG wired fully open. Sorry for wandering so far from the Evo realm though. Next time I´ll try not to generalize.

 

mine redused taper alot. still have a lil tapper but not near what it used to be.

 

Evodan, do you have MAP sensor logs showing before and after boost profiles? I do, and my taper didn't change much. Again, I don't blame it on the WGA, but rather the fact that the turbo simply can't flow enough air. Maybe if I was only running 21psi, then it would taper to 19psi instead of 18psi, but above 25psi, the taper is still quite large since the stock turbo simply can't flow that much air at high rpm.

Inprogress, you should be worried about many other mods before taking this route. You've only barely begun with stg1...

 

Warrtalon,
Honestly, thats what I was thinking too. Do you have any suggestions?

 

The standards: MBC, LICP, tune. After that, cams, SS o2, ported/coated manifold, fuel pump, then alky...and a retune, of course.

 

Yeah i've got the TBE, ordering the fuel pump + mbc and i'll look into the licp, thanks!

 

Then just be sure to get tuned - that's the single most important and effective mod for the IX.

 

YEah looking to do that next too, just need to sell off some old parts to free up some cash

 

map sensor no. but befor i put it on my tapper was more so then after i put it on. nothing was changed or touched other then the fwga. plus i have done tests on my gauge and the gauge i use to test my gauge.

just because your's did not change does not meen someone else's wont. mine did. nothing to brag about but it did. holds higher longer. buy the time redline is in play its not as tapperd as it was befor the wga.

 

as for my mods. im not spilling my hole list but i got it all. just not enoff time to install it all. plus im lazy.

stg 1 was yesterdays news

 

Dan, what I'm saying is I don't trust anyone who makes claims based off watching their gauge. That really means nothing. My gauge appeared to have less taper, but the MAP sensor said otherwise...

 

Hmmmm well warr I hope what you are saying about this mod and close to stock boost levels is correct. If so it may be promising for stock-like boost levels.

 

In the end, it doesn't make a noticeable difference. If you find otherwise, let me know.

 

warr. i agree with you. its just a gauge. i agree there not the most acurate thing to go buy. but when i do a boost leak text every week or so and nothing changes till i cange the wga then id say it did something. not fix boost tapper but it did help as every lil bit counts. like i said. i still have tapper just not as much as i did befor i put it on.