[GTIanZ28]

Fear not V6 owners we are getting some much needed attention from Jason@JacFab.

Jason and I have been communicating for the past couple of months and he is intending to offer both a Ported Throttle Body & Intake Manifold for the new LGX V6.

Yesturday I received the first prototype Throttle Body: (original on right - ported on the left)


Swapping out the Throttle Body is a very simple process. Just need to remove a single wiring plug attached to the throttle body, the sound tube and PCV gas recirculation tubes, and the intake tube. Then it's simply removing 4 x 10 mm bolts and sliding off the old one..... and reversing the process to get it re-attached.



The performance:
Jason stated "These throttle bodies aren't really about HP. In theory you should feel better/quicker/snappier and sometimes smoother throttle response."

I'm happy to report that he is absolutely correct. I instantly noticed precisely what he stated. Some of the hesitation many have complained about is dramatically improved. There is improvement in the throttle response which is most noticeable during normal driving under modest throttle application in the lower RPM ranges. In general the car feels a bit more eager and responsive to throttle application. Using this in concert with a CAI and modified intake manifold should produce some decent gains!

Feel free to ask any questions and stay tuned - Jason will be responding and likely posting some better photo's than mine. There are plans to eventually dyno test my car with both the Ported Throttle Body and the Intake Manifold.

Thank you Jason. Exciting stuff!
Ian

[Rodrage05]

How soon can we get one?

[Jason@JacFab]

Originally Posted by Rodrage05

How soon can we get one?

Probably about in about 1-2 weeks they will start becoming available. I have a few TB's on order at the dealer, just waiting for them to come in so I can start working on them.

Before anyone asks, I can't mention cost outside the classified section. Once I have some ready to ship I will announce it and get them posted up on my website.

Thanks to GTIanZ28 for testing!

[Rodrage05]

10-4

[ussj4brolli]

OoO excited!

[MiamiBlueCamaro]

[GTIanZ28]

2 week update:

Zero problems or issues. I don't think there'd be any reason to expect any. The car is running strong and the seat of the pants feel still gives an impression of an improvement in throttle response.

The ECU has "learned" the new throttle body. Unfortunately, I have to report that the real low throttle application hesitancy has returned. It's like a little dead spot in the throttle when trying to take off gently. Initially this felt improved with the ported throttle body. Now I think the only way to get rid of that dead spot is with a throttle controller or a tune. I had this same hesitancy with my last car (VW GTI) until I got a tune which improved the issue.

Given the modest price I definitely consider the ported throttle body a worthwhile mod - especially if one intends to upgrade the other parts of the intake path (which I do).

Dyno testing anytime soon Jason?

[cellsafemode]

I've noticed his dead spot too on my stock setup. It felt like reducing the air filter restriction helped reduce the effect. Didn't pay attention to see if the ecu "adapted".

It's just missing that torque in between a few degrees of light peddle travel.

Sucks that it would require a tune to fix. warranty concerns make me very hesitant considering it's a 1st year car. Unlike a physical part, it's hard to prove manipulating the ecu didn't cause some random future engine issue.

[GTIanZ28]

Originally Posted by cellsafemode

I've noticed his dead spot too on my stock setup. It felt like reducing the air filter restriction helped reduce the effect. Didn't pay attention to see if the ecu "adapted".

It's just missing that torque in between a few degrees of light peddle travel.

Sucks that it would require a tune to fix. warranty concerns make me very hesitant considering it's a 1st year car. Unlike a physical part, it's hard to prove manipulating the ecu didn't cause some random future engine issue.

Supposedly the Vitesse Throttle Controller fixes the issue. I think it manipulates the sensitivity of the throttle - and it's not a tune so shouldn't impact the warranty.

Do you have a manual or the automatic transmission? I'm curious if it is the same in both?

[cellsafemode]

auto.

Seems that the consensus is that the delay of throttle at that low peddle change rate is part of the throttle tune rather than a function of the stock peddle sensor.

So the only way vitesse could "fix" it is by manipulating the rate of change as the sensitivity of the stock sensor isn't the issue. Not exactly the kind of fix i'd like as I have no problem with how far i need to press the peddle to hit wot and I like being able to maintain a certain speed without cruise control, which would be harder when you decrease the amount of travel to reach a certain throttle level.

The effect from sitting still to letting off the brake and allowing the car to begin traveling forward to gradually getting on the throttle without the car seeming to not see your added throttle pressure is the only change i'd like. Maybe the vitesse does that and nothing else in 0-mode, nobody has reviewed that aspect though.


Not to hijack the throttle body thread. I do like me some ported throttle body. Was just kinda bummed this positive sideeffect was temporary.

[GTIanZ28]

I am going to pull the ported and put the stock one back in. Drive with the stock for a week or so then switch back to the ported.

Doing that should give me an even better sense of the differences and I can report back about that gas peddle dead spot and if it's any better with the ported throttle body.

As its controlled by the ECU I'm betting that it's a temporary side effect of the improved airflow.

[GTIanZ28]

I promised that I would report back after swapping out the ported to stock and driving for a week or so.

Immediately after swapping the stock body back in the throttle lag disappeared. After a few days the lag returned with a vengeance. It was quite pronounced today when I finally said ok it's time to swap the ported back in.

Of course the throttle lag disappeared once again when switching over to the ported. Why the car can differentiate and feels the need to compensate for the different throttle bodies is interesting and IMHO somewhat telling.

There is an obvious difference between the ported and stock throttle body. The throttle lag will still take a few days to return with the ported but!, the lag with the stock body was definitely more pronounced and obvious than I remember experiencing with the ported.

I'm right back to my initial impression with the throttle body change. There is a perceptible difference. The car is more responsive and eager to rev.

I noticed a slight change in the sound (louder) but, didn't want to say anything about it as I figured that it was just my imagination. But, my wife gave me the look and prodded me about modifying the exhaust. Now, my wife doesn't know much about cars and she wouldn't understand the sound difference - but, she was insistent and thought I'd bought new exhaust. I think the car has a bit more bark (intake noise) vs the stock throttle body. It isn't a night & day sound/volume difference and I can't even put my finger on it.... But, it does seem slightly louder (sound tube on the intake?).

I look forward to dyno tests because I actually believe that there will be a minimal gain with the ported throttle body. And looking at the stock intake I can't wait to see some aftermarket offerings. Bet previous estimates of 350+ hp with basic bolt ons for the V6 will prove true.

[ussj4brolli]

I have the throttle controller and it does not affect idle or when you are at a stop and the initial pull the power of the engine gives you... when you get it you program it from 0 to wide open throttle and it ramps up the throttle faster than initial I love it

[Jason@JacFab]

Originally Posted by GTIanZ28

I promised that I would report back after swapping out the ported to stock and driving for a week or so.

Immediately after swapping the stock body back in the throttle lag disappeared. After a few days the lag returned with a vengeance. It was quite pronounced today when I finally said ok it's time to swap the ported back in.

Of course the throttle lag disappeared once again when switching over to the ported. Why the car can differentiate and feels the need to compensate for the different throttle bodies is interesting and IMHO somewhat telling.

There is an obvious difference between the ported and stock throttle body. The throttle lag will still take a few days to return with the ported but!, the lag with the stock body was definitely more pronounced and obvious than I remember experiencing with the ported.

I'm right back to my initial impression with the throttle body change. There is a perceptible difference. The car is more responsive and eager to rev.

Thanks for reporting back, I've been waiting to hear how that little test went.