Porting a 14b?

[Vegas Smith]

ahh, maybe i should have read all the posts before i asked that one

 

[4pistons]

, what exactly is boost creep? and why does a bigger exhaust fix it? thanks

From the ClubDSM site;
"Boost creep occurs when the turbo is pushing so much air that the wastegate, even when fully open, cannot dump all of the pressure._ This results in a continual increase in intake pressure, and is common with upgraded turbos, especially with upgraded downpipes - the exhaust would rather flow through the turbo/exhaust than the more restrictive wastegate, which spins the turbo ever faster._ Cars with this problem can develop mind-blowing (and engine-blowing) intake pressures in a hurry. The general solution to this problem is to port the oxygen sensor housing, turbine housing and/or wastegate to allow them to dump more air._ Otherwise minor malfunctions of the wastegate may also exhibit themselves as boost creep, such as poor travel on the wategate actuator arm."

My theory was that a restrictive exhaust system would hinder the flow through the wastegate and contribute to boost creep. Maybe not. It would seem that the higher the pressure the MORE likely for creep.

Rick - '91GSX No creep...neither of us!

 

[ItsStockOfficer]

Originally posted by 4pistons

Well, not definitely. I don't get boost creep with the stock WG and I've gone to 21 psi. I know three others with ported 14Bs and no creep. Boost creep happens when you flow more air than the WG can regulate and I don't think it's too hard to keep up with a 14B, ported or not. It just doesn't flow that much regardless of pressure. A restrictive exhaust will certainly contribute towards boost creep though.

Rick - '91 GSX

low psi is more creep, restrictive exhaust is LESS creep, not more, You just got it ALL wrong. you realize boost creep is slowly getting more boost, not less, right?

Sean

 

[Vhp777]

Great, thanks a lot for the info, and especially the pictures everyone.

 

[ghettodsm]

ok i'm no genius or anything but i've heard of no boost creep with 20 psi. i've also seen that with a properly ported 14b and 43mm wastgate flappper and ported 02 housing or an 02 elimantor u wont get any boost creep. buddy of mine runs 20 psi and a little over with upgraded fuel system, 3 inch and no cat with all of the above and he gets no boost creep. i guess it all depends on what setup u have and what not. i just know that his 14b screams and is alot more powerful then one would think with a stock turbo. gotta love dsm's heeh latz,kevin.

 

[Bohrn]

Originally posted by 4pistons

Well, not definitely. I don't get boost creep with the stock WG and I've gone to 21 psi. I know three others with ported 14Bs and no creep. Boost creep happens when you flow more air than the WG can regulate and I don't think it's too hard to keep up with a 14B, ported or not. It just doesn't flow that much regardless of pressure. A restrictive exhaust will certainly contribute towards boost creep though.

Rick - '91 GSX

Jeez, I wish this was true, I have a 95 manifold, stock 14b/02 housing, and a great 3" exhaust.

I get creep like no tomorrow! It will go from 10psi(what I have it set to now) and creep to 18 very fast if I hold it WOT from 5k up. I cannot floor it to redline in any gear except 1st or I hit fuel cut due to excess boost.

But if I ran 21 psi, then it would be no prob, as it would start out there in the first place

 

[Silent2g]

i would like pics of the ported 14b.
i myself am in the process of doing this

e-mail is
[email protected]

 

[Bohrn]

me too please

I am contemplating doing it, as I hate boost creep.

 

[92whitetsi]

can you hook me up with the pics too [email protected]

 

[TSi92]

Originally posted by 4pistons

Well, not definitely. I don't get boost creep with the stock WG and I've gone to 21 psi. I know three others with ported 14Bs and no creep.

You're less likely to have creep the higher boost you run. Boost creep usually happens at low boost settings.

Boost creep happens when you flow more air than the WG can regulate and I don't think it's too hard to keep up with a 14B, ported or not. It just doesn't flow that much regardless of pressure. A restrictive exhaust will certainly contribute towards boost creep though.

Rick - '91 GSX

Actually the exact opposite. Boost creep happens when your exhaust out-flows your wastegate. If you have a very free flowing exhaust and a ported turbine housing and no wastegate modifications, you are very likely to have boost creep. A restrictive exhasut will keep you from having boost creep.

 

[KRAZYKOREAN]

 

[tsi_turboawd]

i got boost creep on 3rd after the 2.5" DP install. Now i am planning on porting my o2, ex. mani or a 2G ex. mani, and ofcourse the 14B turbo.
I hope that should END boost creep.

Can you send me pics of the ported 14b pleaze?

im going to lowes right now and look for a nice $20(i hope) electric die grinder.. later

 

[Vegas Smith]

no no no no no, i repeat......no!........you cant port that whole turbo with a dremel tool. it will take you days upon days and bit upon bit. it took me hours just to do it with an industrial grinder. spend about 90$ at sears hardware and you will have to buy some heavy duty daimond bits then you can start porting.

 

[16g-95gsx]

Originally posted by Vegas smith
no no no no no, i repeat......no!........you cant port that whole turbo with a dremel tool. it will take you days upon days and bit upon bit. it took me hours just to do it with an industrial grinder. spend about 90$ at sears hardware and you will have to buy some heavy duty daimond bits then you can start porting.

Thank you, I was going to say NOT AN ELECTRIC DIE GRINDER, by that you meant a dremel, a die grinder runs off of an air compressor and is an air tool. A die grinder provides huge amounts of torque over a standard dremel, and will rip through the metal 10x as fast. Dont kid yourself by doing it any other way.

 

[Otis]

There are some thouroughly confused people on this thread....

 

[ItsStockOfficer]

I have ported multip[le turbos, manifolds and o2 housing with an eloctric drill, take about an hour for a turbo, works fine. My 20g is ported by me and a craftsman 40 dollar drill, air tools are far faster but if you have a drill ic can be done, no prob.

Sean

 

[tsi_turboawd]

NO to dremel? die grinder? wut.. wut.. wut?!?!?

theres no way im using an air compressed die grinder since i dont have an fggin air compressor.

If i was to port my o2, mani, turbo id only use an electric die grinder..
BUT* somebody here said NOT to use an electric die grinder, did i misunderstood? or i am CONFUSED :dunno:

maybe i wont port at all so i wont make a mistake

 

[Vegas Smith]

wiat wiat, you can use an electric die grinder, its just the quality of the grinder that matters. if you use an industrial grinder(ex: sears craftsmen industrial grinder) you will save yourself alot of time and trouble. go to dsm.org and look under the VFAQ: PORTING

 

[16g-95gsx]

Here are links to those damn pics I finally got up

http://dsmtalk.com/forums/showthread.php?postid=683144#post683144

 

[Bohrn]

cool, thanx alot

 

[Silent2g]

i spent at least 6 hours on my 95 o2 housing, massive porting done to it
i shaved at least 6-7 lbs off of it if that tells you anything.

alright, the only i questio i have is port matching the o2 housing to the ext housing.
the outlet of the turbo itself how far down do you go into it?
i was going to give it a nice even once over and leave it be {probably not enough power Vs time to be worth it here, besides, thats some thick crap!}

 

[16g-95gsx]

I didnt go very far at all, if you are just gasket matching the outlet you dont have to, however if you choose to port more and port the gasket a little as well I suppose you could go slightly further. Be sure to detach the turbine housing from the center cartridge when you port the turbine housing though. Just double checking to make sure you know how to do that, if you dont its the band clamp that holds the turbine housing on. Should be a 10mm bolt, then just use a flat head screwdriver and a rubber mallet to gently tap the crack until the housing and cartridge seperate enough you can move them with your hand. At that point be VERY careful and gently remove the housing.

 

[ItsStockOfficer]

Originally posted by Silent2g
i spent at least 6 hours on my 95 o2 housing, massive porting done to it
i shaved at least 6-7 lbs off of it if that tells you anything.

alright, the only i questio i have is port matching the o2 housing to the ext housing.
the outlet of the turbo itself how far down do you go into it?
i was going to give it a nice even once over and leave it be {probably not enough power Vs time to be worth it here, besides, thats some thick crap!}

BWAHAHAHA! Six to 7 pounds? !

Sean

 

[Bohrn]

I was waiting for someone to comment on that

I figured that was a Bat Signal if I ever saw one, but you got it first!

The whole thing must only weigh 5-6 lbs, and if you port the living hell out of it, you might take off 5-10% of it.

 

[Silent2g]

comparing the weight of the 1g o2 housing to the ported 2g o2 housing
there is a big difference in weight
just did that for a comparison sake for a rough idea of how much i took out