Sorry for the 2 year late reply lol, but for anyone else curious, the two inner holes do not need to be plugged. They are under the same air flow. All 4 intake manifold tubes combine together where it mates the throttle body. The outer holes only need to be plugged because it will cause a massive vacuum leak.
Im deleting some tgv's off an sti i just purchased to fit unto an fxt (trying to go topfeed injectors route). Having trouble removing screw that hold flappers together. What to do to remove flappers when screw is stripped?
The bottom of those screws stick out a little bit. You need the grind the small section of the screw that sticks out, and then unscrew it. If it’s stripped like you said, then grab the head with pliers. It shouldn’t be that tight
You won’t be able to unscrew them without grinding off the small section that sticks out. They do that from the factory so the screws can’t come loose and get sucked in the motor
JOHNJESTER GITONGA you can get rid of the sensors. Just make sure you tape up the plug on the harness so you don’t get water or dirt in the plug to cause a short
@@bikerboyz80817 yes you will throw cells for the TGV motors because you’re removing them when you do this. The tuner can turn off the cels when he tunes the car
don't you need to plug the axle holes that are inside the TGV's? I'm in middle of the same project and I've just been trying to come up with an idea on how to plug those
Booki No. Couldn't figure out a good game plan for that. It probably isn't going to hurt anything if you leave them open, but you could always take them to someone with a tig welder or weld them if you have one.
I am still trying to find some solid info about if its bad to leave the inner holes open or not - Like yourself I don't think its going to make much of a difference, the rod wasn't air tight between them anyway...
The inner holes do not need to be plugged. If I recall correctly the reason for that is because they flow equally so having them connect will not affect anything. Each port ends up connecting all together at the throttle body as well.
Do these ever get stuck closed, or partially closed? If partially closed, would they make a low whistling noise? Mine's been throwing the TGV code and making this whistling noise (the noise has been constant for 6 months, even after I took it to a mechanic who said nothing is wrong), and every now and then, it goes into an "extreme loss of power mode", which I think may be when they're stuck closed.
One of mine got stuck closed and threw a code. The ECU then keeps the other closed to maintain the air balance in the 2 sides of the engine and the car has an heavy loss of power but I was able to remove mine, pull out the butterflies and grind out the fins. When I first started it it idled and drove really poorly (since the butterflies are gone nothing is plugged in), I just limped it to a tuner who cleared the code and essentially forced the ECU to think they butterflies were always open and this sorted the issue. I haven't noticed any considerable difference in power or driving but now I don't have to worry about them going bad anymore.
@@cespa4206 Well, it's been 3 years since that post, and in the meantime I had the TGVs deleted, and I can tell you that doing that doesn't help when an uninsured driver runs a red light and T-bones you.
I’d say no more than 5-10hp, it’s good for air flow and reliability. You also don’t have to worry about your TGV motors failing and the butterfly flap getting stuck shut. I’ve had one fail on me in the past
I know what you're saying. I think rough intakes were recommended more on engines with a Carby to induce swirling and fuel atomisation. It doesn't matter on EFI Turbo engines. IMO
I'd like to know if you need to block off the hole between the two TGV intakes. I imagine it wouldn't make much difference when the other inlet valve is closed. It getting the air from the same Intake/Plenum chamber@@grays_garage
jmj5150 It’s not necessarily just for horsepower but is more than 1hp. You also don’t have to worry about a tgv motor failing and causing one of the butterfly valves to get stuck shut and starve the cylinder of air. Just another thing to keep in mind.
@@grays_garageThis is probably the biggest reason for the TGV deletes so that I don't have to change the motors when they fail. My engine is out now so I'm going to do this. I won't take the bar out. I'll just leave it in.
@@vanw6416 Good idea. I actually had a Tgv motor fail on my 04 wrx and caused the cylinders to starve on one side of the engine. I’m glad it didn’t do any harm
jpaugh4 TGV deletes require proper tuning and whoever is tuning the vehicle will turn off the light. If you don’t know you need a tune after doing this job, you probably should not be attempting to do it.
Was wondering. If the seniors are taped up. Won’t that throw a code? That would fail you on a smog check wouldn’t?
you should re-plumb the fuel line and fit a fuel pressure regulator and a NO,4cyl water by-pass kit ! and you will be bullet proof !
Curious how you will tap the inner hole
Sorry for the 2 year late reply lol, but for anyone else curious, the two inner holes do not need to be plugged. They are under the same air flow. All 4 intake manifold tubes combine together where it mates the throttle body. The outer holes only need to be plugged because it will cause a massive vacuum leak.
Good info, but blurry shots and shaky camera. Tripod is a good investment.
So what happens with the wiring and the plug ??? Do i just snip them off the harness?
Erick Mendoza You can just leave the loose plugs on the harness. I do not recommend cutting them off
Im deleting some tgv's off an sti i just purchased to fit unto an fxt (trying to go topfeed injectors route).
Having trouble removing screw that hold flappers together. What to do to remove flappers when screw is stripped?
The bottom of those screws stick out a little bit. You need the grind the small section of the screw that sticks out, and then unscrew it. If it’s stripped like you said, then grab the head with pliers. It shouldn’t be that tight
You won’t be able to unscrew them without grinding off the small section that sticks out. They do that from the factory so the screws can’t come loose and get sucked in the motor
Great video man....what did you do with tgv sensor after tgv delete? Thanks
JOHNJESTER GITONGA you can get rid of the sensors. Just make sure you tape up the plug on the harness so you don’t get water or dirt in the plug to cause a short
@@grays_garage are there any cells cause by this? If so can a tune be written to remove the cell?
@@bikerboyz80817 yes you will throw cells for the TGV motors because you’re removing them when you do this. The tuner can turn off the cels when he tunes the car
Did it throw any code or engine light?
Ej257 This requires a tune after doing. If not, you will trigger an engine light
don't you need to plug the axle holes that are inside the TGV's? I'm in middle of the same project and I've just been trying to come up with an idea on how to plug those
Did you end up plugging the inner holes between each side?
Booki No. Couldn't figure out a good game plan for that. It probably isn't going to hurt anything if you leave them open, but you could always take them to someone with a tig welder or weld them if you have one.
I am still trying to find some solid info about if its bad to leave the inner holes open or not - Like yourself I don't think its going to make much of a difference, the rod wasn't air tight between them anyway...
The inner holes do not need to
be plugged. If I recall correctly the reason for that is because they flow equally so having them connect will not affect anything. Each port ends up connecting all together at the throttle body as well.
You have to plug all the openings where the shaft was.
Do these ever get stuck closed, or partially closed? If partially closed, would they make a low whistling noise? Mine's been throwing the TGV code and making this whistling noise (the noise has been constant for 6 months, even after I took it to a mechanic who said nothing is wrong), and every now and then, it goes into an "extreme loss of power mode", which I think may be when they're stuck closed.
One of mine got stuck closed and threw a code. The ECU then keeps the other closed to maintain the air balance in the 2 sides of the engine and the car has an heavy loss of power but I was able to remove mine, pull out the butterflies and grind out the fins. When I first started it it idled and drove really poorly (since the butterflies are gone nothing is plugged in), I just limped it to a tuner who cleared the code and essentially forced the ECU to think they butterflies were always open and this sorted the issue. I haven't noticed any considerable difference in power or driving but now I don't have to worry about them going bad anymore.
@@cespa4206 Well, it's been 3 years since that post, and in the meantime I had the TGVs deleted, and I can tell you that doing that doesn't help when an uninsured driver runs a red light and T-bones you.
Have you noticed any gain in performance ?
This will give you 10-15 whp
i just bought tgv deletes, wish i bought a rotated long runner intake manifold instead
Do i have those on S Turbo forester?
Hi how much torque and hps ?
I’d say no more than 5-10hp, it’s good for air flow and reliability. You also don’t have to worry about your TGV motors failing and the butterfly flap getting stuck shut. I’ve had one fail on me in the past
Does this affect reliability much?
if tuned to suit, no. if untuned, probably
Intake needs to be rough not smooth exhaust needs to be smooth so there is no hot spots
Jaybird022395 Never heard that before. They come from the factory smooth. Same goes wit porting and polishing, You want smooth walls.
I know what you're saying. I think rough intakes were recommended more on engines with a Carby to induce swirling and fuel atomisation. It doesn't matter on EFI Turbo engines. IMO
I'd like to know if you need to block off the hole between the two TGV intakes. I imagine it wouldn't make much difference when the other inlet valve is closed. It getting the air from the same Intake/Plenum chamber@@grays_garage
jpnitty The inner holes can remain open
Thanks man
all that for 1hp gain...
jmj5150 It’s not necessarily just for horsepower but is more than 1hp. You also don’t have to worry about a tgv motor failing and causing one of the butterfly valves to get stuck shut and starve the cylinder of air. Just another thing to keep in mind.
@@grays_garageThis is probably the biggest reason for the TGV deletes so that I don't have to change the motors when they fail. My engine is out now so I'm going to do this. I won't take the bar out. I'll just leave it in.
@@vanw6416 Good idea. I actually had a Tgv motor fail on my 04 wrx and caused the cylinders to starve on one side of the engine. I’m glad it didn’t do any harm
No it’s an absolute waste of time
an gives no horsepower increase! but enjoy the check engine light! hahahaha
jpaugh4 TGV deletes require proper tuning and whoever is tuning the vehicle will turn off the light. If you don’t know you need a tune after doing this job, you probably should not be attempting to do it.