porting my 14b, oldman, your needed

[91-gsx]

whats up guys, i have just taken off my stock 14b for a rebuild and it i wanted to port anything that i could on it to increase its performance. i already know that i am going to port the exhaust inlet so that i can eliminate boost creep by getting a more direct path to the wastegate. then i am going to port the wastegate hole, along with the material behind the flapper. i was wondering if porting the exhaust housing outlet to match my o2 housing inlet would have any downsides?
thanks for the help, chime in at anytime oldman

 

[GreddyGst]

I would just port what you need to port prevent boost creep (Exhaust and flapper area like you said) You can match the O2 housing if you like too, Just careful with porting don't get too greedy. Do not port more than you need.

Seems like you got this well plan and prepare. Good luck

 

[MrBoxx]

Yes, you'll want to port the turbine housing wastegate outlet to match the shape of the 2g O2 housing inlet. The 2g inlet shape is more like a bell, while the 1g inlet is a little smaller, like it's missing a lobe from the "bell"

1g wastegate hole:

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2g wastegate hole:

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Here's what my 14b looked like when I got done with it:

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Anyway... I hope that gives you some idea of what you can do. I don't know how great of a job I did, since it was my first time and all, but I thought I did okay. I just followed the vfaq as best I could. Good luck.

 

[91-gsx]

well here are a couple of pics on the turbine inlet that i just got done porting. if you look at the wastgate passage and notice that it is a bit shiny there, it is because i nicked it while porting, so the nicks are actually the bottom of the wastegate passage as i ported this part a good deal. it is not perfectly smooth right now but it is a lot smoother then stock. give me some feedback on this please, and sorry about the hazy pictures, couldnt help but move a little. i also opened up the wastegate hole and ground away the material behind the wastegate flapper so that it could open fully. those 2 are easy to judge if i am done or not, but the inlet on the turbine housing is what i wanted you guys to judge. i am pretty sure i am done though. i am also trying to decide if i should port the turbine housing outlet because there is a good amount of material that i can remove to have it match the o2 housing inlet, but it would take me a pretty long time to do it, so i am not sure yet.
thanks for the help guys,
later

 

[MrBoxx]

It looks good. You went a lot further down than I did, actually. I just wasn't sure how far to go or how much to take off because I didn't want any thin spots in the walls of the housing. What does the wastegate area look like now?

 

[ivanr4g63]

Nicely done, it should give you a bump in performance, but to make sure everything goes evenly, you should port the wastegate passage inside the o2 housing as well... its kinda tricky to port that actually, but with a long carbide bit you should be able to open it up a bit more, that'll help release some unwanted creep since now your 14b wastegate flapper will be flowing better you'll need the 02 housing to flow better as well.

 

[91-gsx]

i ported the wastegate hole, and the area behind the wastegate flapper. i did not port the wastegate "bell" part like you did because the opening on the o2 housing for the wastegate is a bit smaller then the wastegate passage on the turbine housing, so it would be pointless to port either sense my o2 housing is an ssautochrome tubular o2 housing. although the o2 housing inlet for the wastegate is a bit smaller, it does not really hinder air flow.

You went a lot further down than I did, actually.

ya i did go down a little more, i also opened up the path to the wastegate a lot more as well, this 14b better not blow on me again or creep.... by the way mrboxx, do you get any creep on your 14b?
thanks for the help again,
later

 

[92awddsm]

While you are porting, you can also radius the inlet of the compressor housing. I have personally seen a couple of lb/min increase just by removing the has step on the inlet. It makes for a better transition from the intake pipe to the turbo which in turn reduces turbulence.

 

[MrBoxx]

My 14b doesn't creep at all, but I'm considering getting a 3" downpipe pretty soon, so we'll see if that changes anything.

 

[91-gsx]

While you are porting, you can also radius the inlet of the compressor housing. I have personally seen a couple of lb/min increase just by removing the has step on the inlet. It makes for a better transition from the intake pipe to the turbo which in turn reduces turbulence.

wow, i did not know there is a step there. that is what people mean when they say that they ported the inlet on the turbo then. thanks for the tip, if there is a step, its going to go. any other tips are much appreciated.
later

 

[Dream On]

While you are porting, you can also radius the inlet of the compressor housing. I have personally seen a couple of lb/min increase just by removing the has step on the inlet. It makes for a better transition from the intake pipe to the turbo which in turn reduces turbulence.

I've never read anything about this. Care to show a link or something about this?

 

[92awddsm]

I've never read anything about this. Care to show a link or something about this?

?WTF Since when have you been able to give a link for your personal experiences? You spend way too much time on the internet and not enough time trying new things. Read the post above yours. Evidently, he has read something about it in the past.

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[/IMG]

See the squared of inlet? Now, look at this inlet. It is not the same turbo but you will get the idea of what I am talking about.

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You can search and find that people pick up airflow just by swapping to a different intake pipe yet I post the obvious that I have tried and found to work and people want links to prove it. Doesnt make sense to me but who cares. I dont, I was just trying to be helpful.

 

[91-gsx]

dude i see the pic, but can you help me out and circle which part you are talking about, i really cannot see it.
thanks

 

[unclesam099]

On the inlet of the big picture, it is shaped like this: | |

On the small picture, the inlet is shaped like this: \ /

Little extreme, but it is between ) ( and \ /

I guess it's curved like the parenthesis at the top, but becomes straighter like the slashes at the bottom where it gets closer to the wheel. I can MSPaint a picture for you if you want

I didn't know that would be something to port out. I thought that the compressor outlet would be a good idea too since it's a bit rough in there.

Is there an easy way to get the compressor cover off? I am going to take the exhaust housing off when I port it and leaving the rest in the car.

 

[daren_p]

wow, i did not know there is a step there. that is what people mean when they say that they ported the inlet on the turbo then. thanks for the tip, if there is a step, its going to go. any other tips are much appreciated.
later

I had never considered porting this are before but it makes sense. I have the evoIII so it doesn't have a square lip like the 14b, its cut on an angle to improve the flow but I guess it could be improved even more with a little porting. But im not taking my turbo off just to do that now . Just make sure your only putting a radius on the out lip, don't want anyone porting all the way through the comp inlet. Turbine to compressor housing tolerances are close & smooth for a reason.

Another area to consider porting while you are doing the comp housing is the outlet. Its a good idea to match this to your j pipe. Im not sure if it matches the 1g stock jpipe but my aftermarket 2g jpipe was much larger & I took off quite abit of material. You will want to use a gasket that matches the jpipe perfectly to use as a guide on where exactly to port. Also watch where your porting as the one section has a fairly thin wall but the way that my jpipe lined up (off cenetered) I didn't need to remove any material from this thin area, just smooth out the rough casting.

I do have some nice pics of my porting, but their on another comp so I'll try to get those up.

 

[daren_p]

dude i see the pic, but can you help me out and circle which part you are talking about, i really cannot see it.
thanks

I was bored so here you go, I pointed to the lip with the arrow. Then drew a side profile of what the inlet of one wall would look like & the lower scetch is what you want to do.

 

[91-gsx]

I was bored so here you go, I pointed to the lip with the arrow. Then drew a side profile of what the inlet of one wall would look like & the lower scetch is what you want to do.

o is that what 92awddsm was talking about, i see how that could improve the flow, i'll do it, thanks for the tip.

Another area to consider porting while you are doing the comp housing is the outlet.

i wanted to do this but i am going to be using the stock j-pipe. it already matches the stock j-pipe hole. so maybe smoothing it out will help with power but i doubt it, anyway i will try to smooth this part out.

about the turbine housing outlet, this guy here has a very fast 18g powered 1g that i am all sure you have heard about, mad props by the way green92gsx, http://www.dsmtuners.com/forums/member.php?&do=vehicledetails&userid=22178

my question is that how would you get the turbine housing outlet as big as his, he has his at 3", the one on the 14b is less then 2.5". obviously there is some back pressure to drop here, but is porting the only way i can do it? maybe a machine shop, but that might not be worth it. take a look at his pictures, that outlet is huge!!!
later you guys

 

[blcknspo0ln]

My 14b doesn't creep at all, but I'm considering getting a 3" downpipe pretty soon, so we'll see if that changes anything.

Oh trust me, it will

92awddsm - Although it makes sense to smooth down the inlet of the turbo, I highly doubt that it will make any difference in flow, but as you said, you have personal experience with it and I never did anything like that on my old e316G. Besides, it takes a whopping 5 minutes to do anyway

As if this wasn't iterated enough at most times, focus mainly on the wastegate flapper entrance hole. The whole objective is to remove that 90* pathway that the air must take before entering through the wastegate hole. The more direct, the less chances you have of causing that same air to go through the turbine (boost creep). The only problem with this is porting TOO MUCH. Just make sure you don't bite into the wall as to make it too thin. Take your time and you're doing a great job

 

[91-gsx]

ya i have the wastegate pathway from the turbine housing inlet opened up al ot as you can see in the pictures, but i dont think i should take anymore out because the air will always strike the bottom of the wastegate passage and cause a lot of turbulance. if you look at the pic, you can also see the bottom of the wastegate entrance, so it is a very direct path, and that is why i wanted oldman's input on this, so that if i needed to remove more i could. i posted the same picture from above again here, because i wanted to show you were the bottom of the wastegate passage actually is sense i nicked it with the bit and it looks like a part of the port. the red squiggly line to the left is bottom of the wastegate passage, and you can see that it can basically scoop the air in to the wastegate so i think this might be enough material removed. and to the right is the wastegate flap, it is very close to the flow now, plus i made the wastegate hole even bigger but not too big because i still wanted it to seal when closed.
thanks for the help,
later

 

[Dream On]

?WTF Since when have you been able to give a link for your personal experiences? You spend way too much time on the internet and not enough time trying new things. Read the post above yours. Evidently, he has read something about it in the past.

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[/IMG]

See the squared of inlet? Now, look at this inlet. It is not the same turbo but you will get the idea of what I am talking about.

You must be logged in to view this image or video.

You can search and find that people pick up airflow just by swapping to a different intake pipe yet I post the obvious that I have tried and found to work and people want links to prove it. Doesnt make sense to me but who cares. I dont, I was just trying to be helpful.

Wow man, don't get so damn defensive. I had just never heard of it before and didn't know what you were talking about. Thanks for posting the pic though, but chill...No need to bi*** at me just b/c I had a question.

 

[daren_p]

I would say you have more then enough material removed from above the wg inlet, though it is hard to tell exactly how far you've gone past since the pic isn't taken right above the wg entrance. When I did my evoIII, if you drew a straight line up from the bottom of the wg inlet, the above material was maybe 2 mm less then the bottom & I have zero creep issues.

 

[92awddsm]

Wow man, don't get so damn defensive. I had just never heard of it before and didn't know what you were talking about. Thanks for posting the pic though, but chill...No need to bi*** at me just b/c I had a question.

I wasnt bitching, I just find it really annoying when someone wants me to post a link to something that I saw in person, not on the net. Maybe you just didnt read my post completely, I dont know.

I posted the pics to make it clear what I was talking about. If it didnt do anything for airflow, every aftermarket turbo supplier wouldnt waste the time radiusing the inlet. Thats why I got the idea in the first place to do some testing with a friend on a 14b on a 2g.

 

[91-gsx]

so far i have had great answers on all the different parts to port, but nobody has told me anything about porting the turbine exit hole to match my o2 hsouing hole. i do realize that most of us do not do this because it is a lot of material to remove, but if you think about it the turbine exit hole is smaller then 2.5", almost like 2.25", im not sure but i will measure. this tells me that it is a bottleneck, and some have ported it and they usually have pretty fast setups on smaller turbos. any feedback at all would help, i would especially like to hear from oldman, or green92gsx with his ported out to 3" on his 18g.
thanks for the help,
later

 

[ian7321]

You need to do a lot more cleaning up on the ex inlet. It looks bumpy as hell, dont know why no one else has said this yet. And the reason no one is answering the 02 to turbo porting is that some people have that part of the ex housing crack and others dont. Your call there, someone cant always hold your hand.

 

[91-gsx]

You need to do a lot more cleaning up on the ex inlet. It looks bumpy as hell, dont know why no one else has said this yet.

i dont know, maybe because that would be stating the obvious sherlock. those pics were taken right after i finished the porting, those bumps that you see are actually places that the bit had ground last, it is actually very smooth inside, just does not look like it.

And the reason no one is answering the 02 to turbo porting is that some people have that part of the ex housing crack and others dont. Your call there, someone cant always hold your hand.

, im in no way one of those people that want crap done for me, i was simply asking if anybody had any experience doing it or know if i should not do it because it might hurt flow. you somehow interpreted that as wanting someone to hold my hand through the process. thanks for the lack of help ian7321, for all the others keep the advice coming.
later