Where should I mount my external wastegate?

[kewlguy]

i did a search and this link was the closest i found


http://www.dsmtuners.com/forums/new...wastegate-manifold-mount-o2-mount-better.html

I was wondering if it mattered where i mounted my wastegate at. Would mounting it on the manifold be safer, or would fabricating an adaptor for my T04b to the manifold and having the wastegate mounted there be safer.

I initially planned and thought that mounting it after the manifold and before the turbo would be the safest however almost all of the posts refer to mounting it to the manifold. Or am i just thinking too hard and it really doesnt matter either way?

 

[buddahboost]

Like they said, if you mount it on the o2 housing, you would have to port the housing every time you switch setups

If you mount it on the manifold, all you gotta do is weld it on there and boom, your done.

There was an article or something that explained wastegate setups but I can't find it.

 

[absolute_DSM]

I would run an interally gated turbo to its max before moving to external. Im running an O2 gated turbo on a near 50 trim on a 2.3 with no seen issues.

 

[silver bullit]

Mount it to the mani, as long as it is centralized youll be fine.

 

[kewlguy]

I would run an interally gated turbo to its max before moving to external. Im running an O2 gated turbo on a near 50 trim on a 2.3 with no seen issues.

the stock turbo was blown when i bought it so i bought a turbo i used on my last eclipse. the last time i had and external running after the manifold, however i thought the o2 sensor was after the turbo in the downpipe. i dont have the car in front of me to check, but i dont remember one before the turbo. i never ported it but it seemed to work just fine. but maybe that was because my entire ehaust from mani down was fabricated. well... if i'ma mount it to the mani i'm thinking it might be easier to just get a manifold with a t4 flange on it already.

 

[crimsondragon]

I'm partial to O2 mounted wg. I think it's easier on the manifold. The FP manifold doesn't allow me to have a flange for it to weld on anyway.

 

[DJYoshaBYD]

+1 for internal gates before external, but if you are doing external, the manifold is where its at..

 

[dSmgs-T]

both will control boost just fine, id rather have it off the manny. but the o2 is a lot easier and cleaner to some.

 

[DJYoshaBYD]

Its not that they will not control boost fine, but it messes with the signal to the BOV, which can cause flutter and whatnot.. I have never personally experienced it, because I just used the j-pipe and manifold, but I have seen alot of other cat's on here that have done that.. Pretty much any mod will tell you the same..

 

[prostreetdsmx1]

off of the collecton the the manifold is ideal in my opinion, I really like the O2 mounted method as well because it makes a cleaner look from the top and works very well with properly made O2 housings.

 

[big_d]

Hafe's new ss cast manifold that is predrilled for a 38mm external wastegate is a decent price and works very well...My brother just put one with a Tial 38 on his 4g63 n/t (ported the 14b to 7cm) and it holds 8lbs flawlessly. I can be purchased from Extremepsi.com . big_d

 

[Gamble97]

Like they said, if you mount it on the o2 housing, you would have to port the housing every time you switch setups

I don't get it. Explain?
It's impossible for us people that run fp manifold to mount it on the manifold. I am all about the 02 housing, but hardly anyone makes them anymore.

 

[dsm-onster]

both will control boost just fine, id rather have it off the manny. but the o2 is a lot easier and cleaner to some.

Yea, internal gating doesn't control boost just fine at +40lb/min airflows. It works. But so many issues can and have cropped up. O2 mouted external is the easiest to install AND the most expensive. Because it allows collector-like wastegating with easy mounting and clean look. It usually flows a little less, because the exhaust gases are reinserted into the exhaust stream so early (like an internally gated o2 housing).

That being said, I still run an o2 housing mounted external and will NEVER go back. Absolute boost control from 35 psi down to 5 psi. Rock solid and predictable. Even with an ebay wastegate.

 

[eclipsetech]

get a 44mm wastegate, you dont want to deal with gaskets. vband is the shit.

get a 38mm o2 tubular houing and have them mod it for the 44.

no creep and it is some what hidden from the cops.

 

[andy4g63]

Off the O2 housing is your best option. You only need to enlarge the flapper area as much as you can and just smooth the angles of the hole that is inside turbine housing/volute/.
Yea, internal gating doesn't control boost just fine at +40lb/min airflows. It works. But so many issues can and have cropped up. O2 mouted external is the easiest to install AND the most expensive. Because it allows collector-like wastegating with easy mounting and clean look. It usually flows a little less, because the exhaust gases are reinserted into the exhaust stream so early (like an internally gated o2 housing).

Mounting gate off runner #1 off the manifold is not even an option, nor being right!!!

 

[appeartobelosin]

Def the mani. just like buddahboost said. your gonna be spending to much money when you need to upgrade or downgrade for that instance. good luck

 

[andy4g63]

If you want to save money, you are in the wrong place, man.
Going fast is not about saving, IT IS about spending money.

 

[Black95awd]

If you want to save money, you are in the wrong place, man.
Going fast is not about saving, IT IS about spending money.

WTF going fast is not about spending money. I have seen a lot of fast cars that didnt cost a fortune.

 

[kewlguy]

i dont care about the price, or really even the power since the rest of my engine is going to produce plenty. I care about going the route least likely for my engine to blow.

 

[dsm-onster]

Then you a quality wastegate actuator and flapper arm. Nothing else should matter to you. "Where should I mount my external wastegate?" is not really a proper question for the sake reliability. Unless you want to hear the answer, "I doesn't matter". ALL/ANY prevent boost spike/creep/overboost.

If you run one cylinder more lean than the other because of mounting on one runner, then your tune is to blame. You should tune for the weakest link. If you can't extract the most power from your setup because you can wastegate enough gases and you purposefully overboost and blow your engine, then your ambitions are to blame.

 

[wolfe06]

put it on the manifold.