bullseye turbine housing it comes with a 38mm flapper

Your 3" 02 elimantor is causing your problem. Its flowing to well for the WG to keep up. Run a ported o2 housing with a 2.5 stainless downpipe and test pipe.

or a manifold mounted external wastegate

port the turbine housing/wastegate more, or go external wastegate.

TSIfreek said:

Your 3" 02 elimantor is causing your problem. Its flowing to well for the WG to keep up. Run a ported o2 housing with a 2.5 stainless downpipe and test pipe.

Click to expand...

is there any reason why i'm not getting boost creep on my 3" o2 eliminator from RNR? i have almost all the same mods except i have a big 16g.

Endz0r said:

is there any reason why i'm not getting boost creep on my 3" o2 eliminator from RNR? i have almost all the same mods except i have a big 16g.

Click to expand...

really? you dont have a external wastegate or have a flapper installed on the turbo? see i was thinking after getting all this shit done that i wouldnt be creeping anymore but it didnt seem to work out that way. you guys know anything that i might be able to check that could possibly be causing it? its just that i dont really wanna get a new exhaust but i might do the external wastegate on the manifold but i hear it doesnt work at well as an o2 dump. im really starting to get tired of dumping money into this thing and seeing no results i mean getting the flapper installed didnt even seem to affect the creep at all so i dont know whats going on

get a hks fuel cut defencer, i red in the turbo pages and they were modding a 1g talon and he put a apexi n1 dp on it and he was getting really bad boost creep and then hit fuel cut so he got a hks fcd and a 190 pump and he gained 109 total hp for spending 640 dollars! and he was no longer getting boost creep it leveled out at a nice 15 psi... maybe this will help you to

hks fcd 125 bux at www.hksusa.com

ryan

mind explaining how a fuel pump and some fuel cut mod to your ecu is going to cure boost creep? makes no sense at all.

~laser_craver~ said:

get a hks fuel cut defencer, i red in the turbo pages and they were modding a 1g talon and he put a apexi n1 dp on it and he was getting really bad boost creep and then hit fuel cut so he got a hks fcd and a 190 pump and he gained 109 total hp for spending 640 dollars! and he was no longer getting boost creep it leveled out at a nice 15 psi... maybe this will help you to

hks fcd 125 bux at www.hksusa.com

ryan

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Uhhh, yeah. Please don't post if you have no clue what you are talking about.

On topic: I had a 16g, TRE O2 housing, N1 DP, RnR catback (no cat) and had CRAZY creep even with an enlarged flapper. I'd try this first, but it is not always the cure.

I only know of 3 ways to help boost creep.

1. porting the wastegate passage

2. larger flapper

3. external wastegate

#3 being the absolute cure to creep but the most expensive. 1 and 2 are just going to help but you may still have creep after that.

its either that or restrict your exhaust flow after the turbo more and we know you dont want to do that.

i dont know how it worked all i know is it did according to the guy tuning the car....

ryan

1. give him a swift kick in the nuts
2. tell him I said he is a dumbass as he falls to the ground
3. self-educate yourself on boostcreep this is a great resource of info
4. never ask him a question that involves boost again

Ganja Man said:

really? you dont have a external wastegate or have a flapper installed on the turbo?

Click to expand...

nope. no ext wastegate and no flapper on the turbo (i think...haven't really looked)

Boost creep is a serious problem on EVO16G turbos… It comes down to the fact that this turbo is TOO GOOD. Which isn’t a good thing in this case . This problem is so real, that I do not even consider EVO16G a true “bolt on" turbo.

The only sure way to get rid of boost creep is to go with an external wastegate. There are many other things that can help, but none of them will guarantee elimination of boost creep. And anyone telling you otherwise is ether:

1. Ill informed or,
2. Deliberately not telling you the truth.

I am also disappointed by all of the DSM vendors who sell large flapper valve upgrades for EVO 16G turbos, the fact of the matter is that EVO 16G exhaust housing simply does not have enough material to be properly ported for a 34mm flapper… So do not look at that as your solution…

An aftermarket O2 housing or O2 eliminator with a well designed wastegate passage will HELP you with reducing boost creep, but just like with any other similar remedies, I will not ALWAYS do the job.

I've read on this board that Pickens has been working on a mod for the wastegate flapper that allows it to open more completely. Apparently, in stock form, the flapper door is not completely opened. This causes the excess gases to get backed up and they end up going through the turbine to cause creep. I've been trying to PM him to see how things are going and if he plans to make these, but he has not responded. It seems like a promising idea, though.

>Apparently, in stock form, the flapper door is not completely opened.

You can say that again! The travel on a TD05 WG actuator is very short, this translates into very small opening of the flapper door. Most people would be shocked if they saw just how little flapper valve opens!

An actuator with more travel might help, but with any other similar solution, I would want to test it, before I buy off on it.

I am currently running an EVOIII 16G and have absolutely NO boost creep whatsoever. Heres what I am running:

-EVOIII 16G (NOT PORTED, WASTEGATE FLAPPER IS STOCK)
-2G O2 Housing (turbine and wastegate passages both ported to the MAX by SBR)
-Crappy ghetto 2.5 inch downpipe fabbed up by meinike, please don't laugh
-ported 2G exhaust manifold

However, I should mention, that I did have a VERY bad case of boost creep when I was running a some weird ghetto Xtreme mbc that came with the car. Since then I switched to a $5.00 ball and spring type mbc that I found on ebay, and it completely eliminated my boost creep. Now I can run 10 psi without an increase in the boost all the way up to the redline in any gear.

>I am currently running an EVOIII 16G and have absolutely NO boost creep whatsoever.
>Heres what I am running:…

So what does this tell me? Your car is well short of its full potential!

Boost creep is a good/bad thing. You want it at a certain point as an indicator of good performance, but at the same time, you do not want it, because it can ruin your motor.

Having a restrictive exhaust is an easiest way to get rid of boost creep. But it is hardly the most efficient way of doing it. You can throw a cat on just about any creeping car and solve the creep issue. But that will cost you as much as 40-50hp.

I see that you have a cat and a “crappy ghetty 2.5 Meinike downpipe”, those should be enough to introduce restriction, which will keep you from creeping. And I am sure that your ported O2 housing does not hurt.

Well the cat is an aftermarket cat that is 2.5 inches in diameter, but I've ran a test pipe and found that boost creep still was not a problem. I contributed not having boost creep to either having a REALLY restrictive downpipe (if you saw the bends in this thing you would probably agree) or maybe the porting on the 02 housing really did make a difference. I also chose NOT to get the turbo ported because I was scared that it would make it creep too badly (although I might reconsider this to get a lower spool time). However I still cannot explain why switching from one manual boost controller to another (not making changes to ANYTHING else) completely eliminated the boost creep problem I had previously. Yes I know my car isn't running to its fullest potential, but I could care less. Its not creeping, and its not TOO loud. If I wanted it to run maximum power I would just take off my exhaust period. The first manual boost controller may have been defective, or maybe certain types of boost controllers just regulate boost pressure better? Oh and by the way, I am running a full 3 inch cat back as well, so the car still did not have any boost creep with a 2.5 inch (with crappy bends) + 2.5 inch test pipe + 3.0 inch cat back and straight through 3 inch muffler. I am only running 10 psi right now because I haven't installed my walbro 190 yet (using stock fuel pump). Personally I believe that switching to a different boost controller might be worth your time. This new $5.00 one from ebay seems to work pretty nice, and after the 10 minutes it took me to install it, all my boost creep was gone.

ok ok ok so maybe the fcd isnt an answer but it seemed to work for this guy but anyway... lando i have a question for you since you seem to know quite a bit on this topic... i plan on an 18g and 3" turbo back with evo3 o2 not ported do you think this combo will creep?

ryan

~laser_craver~ said:

ok ok ok so maybe the fcd isnt an answer but it seemed to work for this guy but anyway... lando i have a question for you since you seem to know quite a bit on this topic... i plan on an 18g and 3" turbo back with evo3 o2 not ported do you think this combo will creep?

ryan

Click to expand...

Hard to say. I'm not sure how big the EVO3 O2 is over stock.

Are you planning on running a cat?
Standard flapper on the 18g?

I can really only speculate.

standard flapper on the 18g no cat and the evo3 o2 is suppose to mate perfectly with the 18g according to multiple stores ive spoken with...

ryan

yes the evo 02 will fit on there you just have to move the downpipe slightly to bolt up. Standard flapper would prolly boost creep on a 3" exhaust system. Might want to spend the extra 40 bucks or whatever to get a bigger flapper mod on there when you buy it. If it still creeps think about an external wastegate.

what if i just got a 2.5" exhaust?? you figure the bigger turbo wouldnt creep.....

ryan