Product Release: Stratified Boost Dial

[EmPeEs6]

This afternoon I've made some more test runs and the results weren't as impressive as before, probably because of the extreme high ambient temps (iat > 45°C - I didn't get much higher load values than 2.1!). Under these abnormal weather conditions you cannot expect anything, but the results were still better than in 3-port mode...This time the maximum wgdc at high revs was around 90, so it really seems that the current boost dial setup is ok.

[Lex]

This may also have to do with the tune. At high temperatures loads will be lower - are you targeting load or boost?

[EmPeEs6]

I'm targeting boost, all correction tables are stock (except for the load comp tables, which are zero'd out) and wgdc is chosen a little bit lower (max 80) than observed. I know that the tune is not yet perfect, since I use much more oem (correction/adjustment) tables than before.
Concerning the low load values, I just wanted to demonstrate how hot it was ;-)
BTW: I guess one reason for the quite stable boost curve is that in 2-port mode the boost system is not so sensitive to little changes in wgdc, which is why boost fluctuations during the correction process are also smaller.

[Lex]

Originally Posted by EmPeEs6 I'm targeting boost, all correction tables are stock (except for the load comp tables, which are zero'd out) and wgdc is chosen a little bit lower (max 80) than observed. I know that the tune is not yet perfect, since I use much more oem (correction/adjustment) tables than before. Concerning the low load values, I just wanted to demonstrate how hot it was ;-) BTW: I guess one reason for the quite stable boost curve is that in 2-port mode the boost system is not so sensitive to little changes in wgdc, which is why boost fluctuations during the correction process are also smaller.

Exactly correct and why it is used by the oems.

[m4tic]

Wow, why did I not know this existed? I'm going to order one for my BNR install.

[ledfootrob]

Lex I recently installed a Cobb FMIC and ported my intake which has made dialing in boost a bit tricky. So I just purchased a boost dial which hopefully will help, I was just wondering when its comes to switching maps from say a 20psi map to a RT 26psi map am i going to have to adjust the boost dial or do you think i'll be able to find a happy medium which will work in both scenarios?

[Lex]

Originally Posted by ledfootrob Lex I recently installed a Cobb FMIC and ported my intake which has made dialing in boost a bit tricky. So I just purchased a boost dial which hopefully will help, I was just wondering when its comes to switching maps from say a 20psi map to a RT 26psi map am i going to have to adjust the boost dial or do you think i'll be able to find a happy medium which will work in both scenarios?

This all depends on the other hardware installed. Generally speaking you should find a happy medium within that window.

On a related note I haven't seen an order for a dial come in. Make sure it was submitted.

[ledfootrob]

Awesome thanks

Sent from my GT-I9300 using Tapatalk

[Lex]

It's hard to beat the smoothness of 2 port boost control using the Boost Dial.

This is a GTX3076 internally gated turbo. EWG setups work even better with the boost dial.

[Lex]

The killer combo with the boost dial is an external wastegate setup. It is just so easy to get picture perfect boost control.

[mrmonk7663]

So you recommend ditching 3 port gs, and use the boost dial with the gs in 2 port/ewg on the 3076?

[Lex]

Originally Posted by mrmonk7663 So you recommend ditching 3 port gs, and use the boost dial with the gs in 2 port/ewg on the 3076?

You can achieve good boost control with the 3 port as well. The boost dial allows you to build a tune that is very flexible however when coupled with an ewg. The shortcoming of the boost dial is being able to drive the last pound of boost from a turbo and that is inherent to two port control. However with an ewg this is not an issue and you get to keep the flexibility and higher resolution of the two port/boost dial setup.

[mrmonk7663]

Hmmm. I have your boost dial sitting in a box. I have a GS in 3 port currently. I have a GTX3076 with a tial hotside on the car. Current boost control is great...but im only running 16psi. Game plan is to NOT run over 23-24psi...and this turbo can go at least 30 psi....so I won't be at the point where I need to extract the last pound of boost, I'm well below that threshold. Perhaps I should give this at try. I'm just not fully understanding why I would want to do this vs my current 3 port.

[Lex]

Originally Posted by mrmonk7663 Hmmm. I have your boost dial sitting in a box. I have a GS in 3 port currently. I have a GTX3076 with a tial hotside on the car. Current boost control is great...but im only running 16psi. Game plan is to NOT run over 23-24psi...and this turbo can go at least 30 psi....so I won't be at the point where I need to extract the last pound of boost, I'm well below that threshold. Perhaps I should give this at try. I'm just not fully understanding why I would want to do this vs my current 3 port.

The advantage is the tuning resolution. Let's say that for a 3 port 5% WGDC change results in 1 psi boost change. For the boost dial 10% WGDC change results in 1 psi boost change. This is just an example. What this means is that you have finer control over boost and are less likely to oscillate or spike.

Try both methods!