I just finished up doing some TGV deletes along with a little P&P'ing on some '05 WRX TGVs. Is anyone interested in getting these done for their car?

I have a set of stock 2006 STI TGVs (2004-2006 STI) that I'm picking up on Wed. and should be finished by Thursday night. Then I have the set for all WRXs (2002-2007) that I'll swap out with mine this weekend.

This includes the removal of the butterfly valves, rod, sensors and motors then tapping and sealing the ends. After that comes a little porting to match the gaskets and polishing with an 80 grit flapper. I also removed the gasket marks and stuck on grime on the mating surfaces with a light gasket remover wheel.

I don't have any pricing yet on the labor and parts. Just testing the waters right now within the local chapter.

I didn't take any 'before' pics, but here are the afters:

http://i23.photobucket.com/albums/b390/Civicguy03/img137.jpg

http://i23.photobucket.com/albums/b390/Civicguy03/img138.jpg

http://i23.photobucket.com/albums/b390/Civicguy03/img139.jpg

i might be interested but i thought i read somewhere that you need to get retuned after this mod. clarify?

i might be interested but i thought i read somewhere that you need to get retuned after this mod. clarify?

Yes you do.
Got to turn off ~8 DTCs so the Check Engine light doesn't stay on.

Another way of doing this is to use the OEM deletes. ;)

i have cobb ap v2, so it shouldnt be too hard to get rid of.

i might be interested but i thought i read somewhere that you need to get retuned after this mod. clarify?

No, I've never heard of having to be retuned. You'll get a CEL from the TGV sensor. Most EM software have a way to disable that CEL from the sensor not being there after doing this mod. I'll know more about it this weekend when I install these in my car.

i have cobb ap v2, so it shouldnt be too hard to get rid of.

Ya, you can disable that code easily with the Cobb AP. Just email Cobb and they should send you a map that'll disable it.

i'll talk to them shortly and get back to you for sure! if i do this, i might as well do a aps hard pipe inlet!

The gains after this mod are crazy. You're looking at 10-15 whp/wtq afterwards. There's also an average of abt 150 more cfm of air flow.

Yes you do.
Got to turn off ~8 DTCs so the Check Engine light doesn't stay on.

Another way of doing this is to use the OEM deletes. ;)

No, I've never heard of having to be retuned. You'll get a CEL from the TGV sensor. Most EM software have a way to disable that CEL from the sensor not being there after doing this mod. I'll know more about it this weekend when I install these in my car.

it seems that tuners disagree with you.

it seems that tuners disagree with you.

It seems that there was one tuner in response to someone's question. But thank you for your informative post.

Getting 'retuned' after this mod is not required to keep the CEL off but it is very easily done if you have an AP/ST, Enginuity, ect.

Here's a thread with more info:
http://forums.nasioc.com/forums/showthread.php?referrerid=103730&t=1239406

It seems that there was one tuner in response to someone's question. But thank you for your informative post.

Getting 'retuned' after this mod is not required to keep the CEL off but it is very easily done if you have an AP/ST, Enginuity, ect.

Here's a thread with more info:
http://forums.nasioc.com/forums/showthread.php?referrerid=103730&t=1239406

if you do not retune.. how are you going to make use of your new 150 cfm of airflow?

and thank YOU for your informative post!

:lol: The increased air flows are from 3rd party flowbench tests. You don't suddenly run lean when you put these on. :lol:

Please read up on how these work and why JDM STI engines don't even have these; hense why people do JDM intake manifold swaps. This process is about deleting a very restrictive piece in the USDM intake.

:lol: The increased air flows are from 3rd party flowbench tests. You don't suddenly run lean when you put these on. :lol:

Please read up on how these work and why JDM STI engines don't even have these; hense why people do JDM intake manifold swaps. This process is about deleting a very restrictive piece in the USDM intake.


wow.


thankfully you do not tune cars

Ok,

so....i'm new to cars in general...soo...

what are these? lol

:lol: The increased air flows are from 3rd party flowbench tests. You don't suddenly run lean when you put these on. :lol:

Please read up on how these work and why JDM STI engines don't even have these; hense why people do JDM intake manifold swaps. This process is about deleting a very restrictive piece in the USDM intake.

Actually, there's not much gained from doing tgv deletes, unless you tune the car for it.
Now, if you're doing a bigger turbo...>20G...then by all means, delete away.

But to say "tgv deletes give you XXX more power" is wrong.

Ok,

so....i'm new to cars in general...soo...

what are these? lol

TGV = Tumbler Generator Valves. For reference, here's a pic from Gimmspeed.com:

http://www.grimmspeed.com/images/product_images/tgv_vs_stock_600_1.jpg

They are located between the intake manifold and the head. Basically these butterfly valves are closed during cold startup to help with emmissions. Then afterwards they try to open all the way, but don't neccesarily do. It's a very restrictive piece that our US WRXs have in them.


Actually, there's not much gained from doing tgv deletes, unless you tune the car for it.
Now, if you're doing a bigger turbo...>20G...then by all means, delete away.

But to say "tgv deletes give you XXX more power" is wrong.

I saw a dyno graph of a Stg 2 WRX putting out 10+whp afterwards. Of course the bigger the turbo, the higher the gains from this mod.

yahh for 20G!

any disadvantages with tvg deletes?

Not that I know of. Maybe the whole CEL thing from them not being there anymore, but your tuner or form of EM should be able to fix that.

any disadvantages with tvg deletes?

Reduction in idle quality is the main complaint.

I saw a dyno graph of a Stg 2 WRX putting out 10+whp afterwards. Of course the bigger the turbo, the higher the gains from this mod.

Never seen gains that high on a street car.
Big turbo & higher flow rates, maybe.

Grimmspeed's post:

http://forums.nasioc.com/forums/showthread.php?p=20923995

Just finished up a set for the 04-06 STI. Let me know if any of you guys want them and I can bring them to the next meet or I'm going to toss them up on eBay within the next couple days.

Also, if you dont have EM that will clear the CEL, just leave the tiny TGV motors wired in and you won't have a CEL.

http://i23.photobucket.com/albums/b390/Civicguy03/For%20Sale/img194.jpg

http://i23.photobucket.com/albums/b390/Civicguy03/For%20Sale/img195.jpg

Also, if you dont have EM that will clear the CEL, just leave the tiny TGV motors wired in and you won't have a CEL.



Not true.

For 2002 -2007 WRX/STi models, the ecm provides output to the motors & needs to see input from the position sensors.
Leaving everything plugged in will not prevent multiple codes from being tripped.

There are two choices:

1. Properly tuning the ecm & turning off the correct DTCs.

or

2. Leaving the butterfly rod installed.

BTW...your work looks very good. What grit flapper are you finishing with?

Sorry, I ment leaving the rods hooked up under the hood. But I'm pretty sure all major forms of EM and map-modding programs have an option to turn off this CEL though.

Thanks. I finish with a couple different sized 80 grit flappers. They give a smooth texture, but rough enough so the air turbulence is still good.

also note.... 2007+ legacy 2.5i's have tgv delete from the factory