WGA Install question?
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yeah ive been running the IX turbo...that link i provided of my dyno runs...mod list is there...
i definitely dont have a leaky dv...ive got the new synchronic dv...it works great...
my boost controller is the newest grimmspeed mbc...
i definitely dont have a leaky dv...ive got the new synchronic dv...it works great...
my boost controller is the newest grimmspeed mbc...
Look to get you in the Ballpark, and without having to mess with it too much you'll probably want the peg on the flapper valve's pivot arm to cover half the hole on the turnbuckle, which is that flat attachment on the threaded end of the actuator rod.
That is, you'll want to adjust the turnbuckle to where it just slides freely on and off of the flapper valve peg, and then tighten it(clockwise) another three to three and a half complete rotations. You'll have to pull on it hard to get it to mount up onto the peg. That should be about 15-17# preload.
If you want it to spool even quicker, then you'll want to preload it even more. I'd say that ideally, for 25# of peak boost you'd want preload to be set at about 20-22#.
That is, you'll want to adjust the turnbuckle to where it just slides freely on and off of the flapper valve peg, and then tighten it(clockwise) another three to three and a half complete rotations. You'll have to pull on it hard to get it to mount up onto the peg. That should be about 15-17# preload.
If you want it to spool even quicker, then you'll want to preload it even more. I'd say that ideally, for 25# of peak boost you'd want preload to be set at about 20-22#.
Last edited by sparky; Oct 10, 2011 at 02:52 PM.
An easy way to find out what your current preload level is would be for you to turn your MBC out all the way to its full soft setting(counterclockwise). Take it for a WOT run in 4th gear. This will give us a pretty good idea where we are in terms of preload. Otherwise we are pretty much shooting in the dark.
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had too much preload...watching the videos from fp...the actuator arm was hella far from the wg flapper. i put it closer...but dont want to go WOT until i get retuned on e85...
new 25psi wga is arriving today. going to install that to the FP specs of "high" preload.
thanks for all the help sparky.
new 25psi wga is arriving today. going to install that to the FP specs of "high" preload.
thanks for all the help sparky.
There's lots of peeps running the 25# actuator on here who will be able to help you install and set it up correctly with respect to preload for your particular setup.
Keep in mind that eventhough FP may list an actuator as a 25#, or 18# unit, etc., it is likely that your new FP 25# WGA may actually open earlier than the advertised set point. So, you shouldn't just take it for granted that the 25 pounder is going to keep the flapper valve closed tight on its seat until 25#. In reality the WG flapper will crack and begin to lift way before 25# of seat pressure is reached.
A buddy reported that his 25# unit actually started lifting at 17-18#. So, just take that advertised rating with a grain of salt. For example my old FP 18# unit lifts full open at 14#. So, go figure.
The best thing to do in my opinion would be to install it with zero preload and verify it so that you can establish a baseline for future actuator rod adjustments.
I figure zero preload, also known as base WG spring pressure to be the boost level attained with the actuator rod length adjusted to where it freely slides on and off the peg on the turbine housings flapper valve pivot arm on a fully assembled turbocharger. The base spring pressure should always be set with any means of boost control deactivated and disconnected.
Keep in mind that FP's installation videos for WGA setup are probably not aimed at minimizing spoolup time or improving rate of spool. So, if you set it up as per their advice you will not be achieving the quickest turbo spoolup possible.
As a turbo manufacturer, FP may tend to provide somewhat conservative WG preload recommendations. They don't want a bunch of ultrafast spooling FP Greens and Reds out there. FP is trying to minimize warranty claims on their customer turbos due to what they see as excessively high turbocharger shaft speeds.
So, understandably, from FP's viewpoint, faster spoolup from higher WG preload levels should be avoided. Because the resulting higher turbocharger shaft speeds in general will tend to reduce turbocharger bearing lifespan and thus potentially might lead to an increase in warranty claims on the turbos that they build and sell to the Evo community.
Keep in mind that eventhough FP may list an actuator as a 25#, or 18# unit, etc., it is likely that your new FP 25# WGA may actually open earlier than the advertised set point. So, you shouldn't just take it for granted that the 25 pounder is going to keep the flapper valve closed tight on its seat until 25#. In reality the WG flapper will crack and begin to lift way before 25# of seat pressure is reached.
A buddy reported that his 25# unit actually started lifting at 17-18#. So, just take that advertised rating with a grain of salt. For example my old FP 18# unit lifts full open at 14#. So, go figure.
The best thing to do in my opinion would be to install it with zero preload and verify it so that you can establish a baseline for future actuator rod adjustments.
I figure zero preload, also known as base WG spring pressure to be the boost level attained with the actuator rod length adjusted to where it freely slides on and off the peg on the turbine housings flapper valve pivot arm on a fully assembled turbocharger. The base spring pressure should always be set with any means of boost control deactivated and disconnected.
Keep in mind that FP's installation videos for WGA setup are probably not aimed at minimizing spoolup time or improving rate of spool. So, if you set it up as per their advice you will not be achieving the quickest turbo spoolup possible.
As a turbo manufacturer, FP may tend to provide somewhat conservative WG preload recommendations. They don't want a bunch of ultrafast spooling FP Greens and Reds out there. FP is trying to minimize warranty claims on their customer turbos due to what they see as excessively high turbocharger shaft speeds.
So, understandably, from FP's viewpoint, faster spoolup from higher WG preload levels should be avoided. Because the resulting higher turbocharger shaft speeds in general will tend to reduce turbocharger bearing lifespan and thus potentially might lead to an increase in warranty claims on the turbos that they build and sell to the Evo community.
Last edited by sparky; Oct 12, 2011 at 11:05 AM.
Thread Starter
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From: Madison, WI