porting my 14b, oldman, your needed

[ian7321]

What I meant with the O2 housing porting is that it can have good effects, like better flow and less restricition, but bad as well because it can crack from taking off metal.

 

[91-gsx]

i went ahead and ported the turbine outlet, it use to be about a 2" opening, i have ported it to 2.5" i finished porting it, now all i have to do is smooth it out. this should reduce a lot of backpressure and give me some good power, while extending the usable power band of the 14b past 6000rpms. any ideas or tips, please feel free to post them.
later

 

[~laser_craver~]

I recently just tryed this on my b16g no luck with the porting at all. maybe i didnt do enough. It seems to me like it helped a little. But overall it still creeps and faster once it does. The o2 dump didnt change a thing, just made the car loud as all hell. Any help here?

 

[91-gsx]

, well i have some experience now so maybe i can help. the o2 dump will not help because it helps get the exhaust out, but you need to make it easier for the exhaust to get out. do you have any pictures of the porting you did? its actually very easy to take off your turbine housing if you have the 16g on your car, all you have to do is unbolt the exhaust manifold, and the downpipe. unhook your o2 sensor from the main harness. then unbolt the clamp that holds the turbine housing to the center section. if it does not pop off easily, just stick a flat head in between the 2 pieces and give it a nudge, it should pop off easily though. make sure to slide the turbine housing off off the exhaust wheel carefully so that you do not damage the wheel. if you just want to show us the porting that you have done already, then just take off the manifold and take lots of pictures of the work you have done and we will tell you if it needs more porting. hope this helps.
later

 

[~laser_craver~]

I have pics posted up here. 1 sec ill get a link.

 

[~laser_craver~]

http://www.dsmtuners.com/forums/showthread.php?t=215407

Posts 1 and 4

 

[91-gsx]

i think i know what your problem is, the area above the wastegate should be opened up more, this way you force the air to make that turn. dont take out to much because you might cause too much turbulence, but you can see in my pics that i have taken out a lot more above the wastegate then you have. oldman also said at the time,

I would have taken out more on top of the wastegate entrance at the inlet but if you ran out of tools, let's bolt it on and see. How bad were you creeping and how much pressure are you planing to run?

good news is that you could probably remove more material above wastegate hole without even removing your turbine housing. just cover up the area above the blades very well so that you do not get shavings in there. all you would have to remove is the exhaust manifold.
you polished it nicely though, that is were i am now, what did you use to polish it?
later

 

[~laser_craver~]

If using a carbide bit like i did, take sand paper drums from 80-120 then sand paper wheel, and then go by with actual polishing wheels and buffing wheels with some good polishing compound..... Makes a nice bling factor and the carbon build up is really really smooth on it after polishing it.

 

[91-gsx]

cool, thanks for the tip. so are you going to report the housing or not? if you do, post the pics here so we can all see and compare.
later

 

[~laser_craver~]

Ya i guess i can try one last time..... If it doesnt work this time im jsut going to weld a cat back in tho... Honestly ive put forth like 3 days worht of actual time working on trying to get rid of this dam boost creep, between the welding porting assembly diassembly. It just getting old. Ive ###### takent he exhaust manii o2 and turbo out like 6 times now....

 

[91-gsx]

, that sounds like a lot of fun man, NOT!!! i would just take off the exhaust manifold and put something to block the shavings from getting on your turbine wheel. then port the area right above the wastegate. make it so that the bottom of the passage is like a scoop, yes this introduces turbulence, but it is the only way i have seen people have success with porting for creep. just remove a little, take a pic and show us. if you need to remove more, we will tell you. like i said, i think you just need to remove more material from above the wastegate. hope you try again.
later

 

[~laser_craver~]

I have to take the hole thing out becuase my porting tools are down at the garage downtown, and my car doesnt sit high enough to drive into the garage. And the compressor at my house is to small to run an air tool for more then 12 seconds.

 

[91-gsx]

after i was done porting the above, i noticed i lost the centering pin. anywhere else i can get one, either that or ill have ot make one.
later

 

[MrBoxx]

Someone in another thread said they managed to make one out of a Dremel tool bit, the smooth shaft part that actually inserts into the Dremel tool. He said that it had to be cut to the right length and filed down a bit to fit, but it would work.

Could you use a large magnet to try to pick it up where it might have gotten lost?

 

[91-gsx]

i was going to use a magnet, but i was not even aware that it fell, let alone where it fell.
so what do you guys think of the porting i have done, i think that the turbine housing exit hole will give the most gains. i ported it from about 2" to 2.5" all this was done with grinding stones, i could not find carbide 1/4" bits. they only sell the small dremel ones.
later

 

[compression]

i ported my evo3 out also, but i didnt take care of the whole lip on the exhaust inlet (i know i should of) i was tired of porting, i did my head also here are some pictures

heres the flapper wheels i used

<a href="http://photobucket.com" target="_blank"><img src="http://i48.photobucket.com/albums/f224/mxdawg121/Picture095.jpg" border="0" alt="Image hosting by Photobucket"></a>

and with this tool (i used that sandpaper wheel too)

<a href="http://photobucket.com" target="_blank"><img src="http://i48.photobucket.com/albums/f224/mxdawg121/Picture092.jpg" border="0" alt="Image hosting by Photobucket"></a>

heres exhaust inlet before

<a href="http://photobucket.com" target="_blank"><img src="http://i48.photobucket.com/albums/f224/mxdawg121/Picture088.jpg" border="0" alt="Image hosting by Photobucket"></a>

and after

<a href="http://photobucket.com" target="_blank"><img src="http://i48.photobucket.com/albums/f224/mxdawg121/Picture110.jpg" border="0" alt="Image hosting by Photobucket"></a>


heres the best picture i have of the exhaust outlet

<a href="http://photobucket.com" target="_blank"><img src="http://i48.photobucket.com/albums/f224/mxdawg121/Picture100.jpg" border="0" alt="Image hosting by Photobucket"></a>

and i have full 3" turbo back (3"o2 housing and external dump tube)

<a href="http://photobucket.com" target="_blank"><img src="http://i48.photobucket.com/albums/f224/mxdawg121/Picture087.jpg" border="0" alt="Image hosting by Photobucket"></a>


and i have full 3" turbo back (3"o2 housing and external dump tube)
and i creep from 10psi all the way to 19psi......... i did not port the wastegate flapper at all.>

 

[91-gsx]

everything that you did looks great man, except you polished more then you ported. you should take that step off of the inlet and port more material from the top of the wastegate pathway. this is what will mostly take away your boost creep. the outlet of your turbine housing is bigger because it is a 16g turbo and it has a 7cm turbine housing. you already have it on your car now, if you like how it performs right now and you can deal with the boost creep in ways of cooling and fuel then you are fine for now. in my case, the 14b would creep all the way to 25psi in 3rd and higher, and about 21psi in the lower gears. i had enough fuel, but it is almost impossible to run that without race gas or alky injection, which is what i plan on doing next . i really like your polish job, i need to do that next. o ya, and i have to rebuild the turbo..., fun.
talk to you later

 

[~laser_craver~]

Here is what my turbo looks like right now. The pics i showed before were a little old i actually useda carbide bit on it a little bit after that so this is waht it looks like right now..... Tell me what all i should do now. Becuase I am still creeping after porting my turbo to this, i ###### just need to port more.

w/ flash

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w/ out flash

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Still Broken

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[daren_p]

Ok here are some pics of my port job, evoIII with zero creep. Ported turbine inlet & outlet, 34mm wg flapper, wg outlet & compressor outlet.

 

[~laser_craver~]

Umm lemme state something, you have no creep because you have a cat.

And your port job looks good if all you want to do is gain spool characteristics. However your port job does nothing to help elminate creep.

 

[daren_p]

Umm lemme state something, you have no creep because you have a cat.

And your port job looks good if all you want to do is gain spool characteristics. However your port job does nothing to help elminate creep.

How do you figure that my port job does nothing to eliminate boost creep? Just so you know I ported my buddies evoIII who runs 3" turbo back without a cat & he to can hold 14 psi with zero creep.

What has been done to prevent boost creep on the porting jobs I did: Remove extra material above the WG entrance, 34 mm flapper, remove abrupt 90 deg corner at WG outlet.

Things that don't need to be done on the evoIII: Removing extra material behind the WG flapper so you can open it up 90 deg. Why is this not needed? because if you test the WG actuator travel you will find that it doesn't move enough to open the flapper more then about 45 deg, making removing the extra material behind the flapper pointless.

 

[91-gsx]

laser craver, you need to port the area right above the wastegate entrance sot hat it can take in more of the exhaust. i think you should do that and smooth it out. just post another pic after you port a little and before you start smoothing out the material.

 

[staticbrainwash]

I've been reading this for a while when it updates and i think lazercraver you've got it almost right. Yes a cat will help ease boost creep because it's adding a restriction, but no cat is not the cause of creep. Creep is caused by too much exhaust continuing to hit the turbine and not getting diverted into the WG area. Opening up these areas and making it easier for more exhaust gas to bypass the turbine and travel out of the system is the only way to solve the creeping problem. Hence why people port like crazy and move to 34-38mm or external manifold mounted WG's and flappers. A cat only helps mask the problem by putting in a restriction.

While i may not have done any porting myself yet, i've been reading as much as possible to prepare myself for the 2g manny and o2 i got and will put on. Which then i will also do some turbine porting. Keep it up man, sounds like you might almost have it solved, just pull some more from that inital WG entrance and open up the exit more.

 

[91-gsx]

Ok here are some pics of my port job, evoIII with zero creep. Ported turbine inlet & outlet, 34mm wg flapper, wg outlet & compressor outlet.

you said you ported the turbine outlet, what was it before on the evo3 16g, and how much did you port it to? or did you just smooth it out? this is very interesting and a lot of us are benefiting from this thread.
later

 

[staticbrainwash]

when you guys are porting the turbo areas, it looks like you are fully pulling the turbo apart. i know it's just one clamp, but how bad are they to pull apart and then in turbo reassemble. I'd like to port my 14b when i go to put my 2g manny and o2 on. should i pick up a rebuild kit for it too while im at it?