Im running a IX turbo on my evo and was wondering how do you know how much pretension to put on the turbo?

when i got my IX turbo i had to get my actuator from another friend and it obviously wasnt installed, so i dont know how much to "preload" the WGA of the flapper...

is there a standard setup that everyone follows?

this is OEM IX WGA on my IX turbo...

say for instance how far should the arm on the WGA be from the flapper when installing?

I feel like this is whats causing my boost to not act right...unless i also have a boost leak?...but ive tested a couple time and found my only leak to be from the meth nozzle...but i pulled the meth setup off and installed a stock UICP hardpipe and retested and everything was good...

see my dyno thread for information on my setup...

https://www.evolutionm.net/forums/ev...-272-meth.html

my boost in 3rd gear from 2500RPM to redline will get to ~20psi really quick then struggle to get to ~25psi...and theres where im capped...

i need to fix this issue asap, before i make the switch to e85 and up the boost...

 

Get a stiffer wastegate...something like a FP 25psi. This will allow you to hold boost better in the upper RPM range.

Set it 3-4 psi than your targeted max psi you want to run.

 

regardless what the WGA is...how should it get installed? how far should the flapper be from the arm when the arm gets pulled onto the flapper?

more help bump!

 

ttt...anyone that installed an OEM Wastegate Acuator please chime in!

 

I'd start off with a 1/4" from flapper to arm. Do a pull and adjust the preload again accordingly.



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here are some vids that explain how to set your wastegate
http://store.forcedperformance.net/m...de=Turbo-Parts

 

thanks!

i watched the standard setting video and i think i have quite a bit too much preload...ill adjust it after my engine cools down...lol

 

holy crap! after i watch the high setting for preload, my preload is set wayyy more than the "high level"...especially for the stock wga.

in that video you can still see the flapper in the eye of the WGA arm...mine i actually had to pull the arm up onto the flapper a lot.

definitely gotta lower my preload!

thanks again!

 

How much boost(peak boost level) will you be running? Is it a stock IX actuator to be mounted on a stock IX turbo? How interested are you in achieving quickest spoolup? Are you willing to spend time to set it up just right for your particular driving application? Or, do you just wanna slap it on and get it in the ballpark and dive it w/o too much setup time or concern for maximizing spoolup and rate of spool? Is the turbo already installed on the car?

 

In what way is your boost, "...not acting right"?

 

I tried opening the FP instructional video but I can't from my computer. At any rate, if the instructions are for setting preload on a FP high pressure actuator then the setting, or length of the actuator rod would be different than it would be with your stock actuator.

 

well currently i am running about 25psi peak, what my boost gauge shows is when flooring it in 3rd gear from 2500 to redline, the boost flies from 0 to 20psi pretty quick, but the rest of that needle shakes to get there to 25...the 5psi to get to 25psi is a struggle...

when i was running my stock viii turbo with my 10.5 hotside i ran 30psi without an issue like this...

i feel as though my powerband is almost like an N/A car...

 

If you are trying to estimate minimum or maximum preload setups to use on your stock actuator configuration by looking at images of preload levels on either the FP 18#, or FP 25# actuator setups then you are going to be way off because the overall rod lengths and even the turnbuckle lengths as well as the spring rates on the three actuators are all different.

So, that video may be a bit misleading unless you are actually using an FP actuator on your turbo. Even then, it would look different depending on whether it was the 18# or the 25# FP unit.

 

Yeah, barring some other problem such as an undetected boost leak, or a leaky DV, I'd guess that you are not running enough preload.

Incidentally, the stock actuator is good for boost levels up to 25#. From 22#-27#, the FP 18# actuator is the ticket. For over 27#, I would go with the FP 25# unit.

 

BTW, what are you using to control boost(MBC,etc)?