Holy crap guys my s4 wastegate is ported to the MAX!!!! i still get boost creep. Is there anything i can do to stop boost creep till i get an external wastegate. This was all done by my friends shop which has a mill, so we milled the hole to 32mm with a 33mm flapper. How am i still gettign creep with this MASSIVE wastegate?

 

From what I hear S4 WG is supperior to the S5. What are your mods?

 

Wastegate most likely isn't your problem. Id put my money on the flapper not opening far enough. Is the exhaust valve (flapper) opening atleast the same distance as stock? It doesnt matter if you have a huge wastegate if the flapper doesn't open as it should, you'l still creep.

 

^ Correction: A max ported s4 wg with a new flapper is superior to an s5 wg ported to the max. Stock for stock the s5 is superior.

 

Yup flapper opens a just like stock. goes untill it hits backign plate. The stem of the exhaust valve was cut off after i took that picture.

Santiago mods are in sig in first post.

 

How far though? Is the new flapper the same height as the old flapper?

I had that problem with mine, mine is around 38mm and it still crept, I shorted down the flapper to around stock, and it holds perfect now

 

yeah, try trimming that bit off the end of your flapper
what mods? and what boost is it creeping to and what boost are you trying to run?


and for the time being, just put a huge restriction in your intake, maybe cut a plate to fit between your AFM and AFM adaptor for your cone filter and just make a small hole.....wait you have a microtech which probably means no afm......uhm
find a way to restrict your intake

 

I dont know i didnt measure it all but it opend a good bit. looked like it did stock.
Again Mods are in sig.

I got car back together today adn ran the car. i hit 9psi in second gear at around 6k on a hot florida day. with no boost controller. I know actuator is working i can see boost drop off at like 6psi then build back up and creep as rmps increase.


I would rather have it creep than to lose a bunch of power restricing intake. I have the plenty of fuel and a greddy FMIC to keep my motor safe. With this set up im sure to hit 12-14 psi by redline in 3rd and 4th gear.

The flapper may be a little taller than stock but i also grinded down on the surface so it would have more room for exhaust gases to flow out which should make up for the small amount it is taller than stock flapper.

 

Yeah I meant as far as porting capabilities.

 

Just wanted to make it clear

 

Yeah no prob

 

lol, ouch. I ported my wastegate as much as I could with the stock flapper. I get a solid 8psi, but I also have the stock 2" jdm downpipe (no cats), welded to 2.5" straightpipe and stock TID with conefilter. Your gonna have to shave the back of the turboplate off so that your big door will actually be worth it. The valve is hitting the back of the plate so it's no opening to it's full potential. I can guarantee this is your problem.

 

How about not? since today i took off the back plate which i had already shaved because i thought it might hit and i got my air compressor to open wastegate adn it clears the palte no problem. I put a ruller right over the wastegate across the turbo to see if it would and it never did. So opening is not my problem. I just flow to much air for stock turbo i guess.

 

I guess so, whats the problem with creepin up to 10? You have enough stuff to keep protected, you'll just burn the turbo out faster.

 

I want good boost responce, not 6 psi at 3k adn 10psi at 6k. i want 10-12psi at 3k all the way through the powerband.

 

just curious, can you post a pic or your air-compressor-actuated wastegate? heck, i thought the original wastegate hit the plate....what do i know?

 

wtf, i was planning to weld a 34mm flapper i got off a t3 turbo, and u still get creep??????

 

I fixed it, basically i was trying to run less boost that what i should. I was tring to see if it would hit 5psi when i really wanted 10. So someone told me to turn it up to 10 and see if it would still creep or stay. Well it stayed. So i cna hit a constant 10psi all the way through powerband.

 

ok thanx... niiice

i wonder how long it will take me to grind out the hole that big with a bit grinder

 

at least two six packs and three bits....^^^^^