So i got an afc neo and a tune for my car only to find out that my boost falls off severely after about 5200rpm. tuner says its the wastegate actuator so he recommends a better boost controller and/or upgraded wastegate actuator. im kinda depressed that my peak horespower is at 5200rpm and weaker than a civic si so i kinda want to fix this asap. i plan on picking up an avc-r but im not sure if its enough, anybody know who makes upgraded wastegate actuators for s4 turbos? or can the s5 ones be retrofitted? i saw HKS made one for s5 turbos, and then i cant find others, even though FURB used a Forge one i cant find any info. any one have any other suggestions to holding boost? let me know please. oh and i searched, but every time i search wastegate actuator i find BNR's upgrades... so yeah sorry.

 

hks made one

 

Whats wrong with the BNR?

 

I got an ebay unit sitting on my hybrid, though I havent run it so I cant tell you how it is.



Should fit stock, would require slotting the bracket holes but should work.

Port your wastegate while your at it.

Electronic boost controllers are pretty good over manual boost controllers, they typically monitor boost creep/spikes and defend against them.

 

A very cheap alternative is adding a spring to help hold the wg stay shut, a bit of fiddling with the boost controller and your done. Ive got the Profec B SpecII, best ever made IMO. You have exhast backpressure which increases with rpm which will be directly proportional to how hard it wants to open the wg. Spring helps pull it shut harder so you just need to increase how much it takes to open on the boost controller. Pull spring, not a push spring.