R34 Boost Controller

[MR34GT]

Hi Guys,

Bought a boost controller for my R34 GTT yesterday. Its a Gizzmo MS-IBC.

Problem is ive wired the boost controller up and everything seems to be in the right place but no matter what figure i set the duty cycle and gain percentages at m car is only running 5psi max!

This seems to me to just be the turbo running on the standard wastegate presure.

Anyone else had this sort of problem when fitting a boost controller to a near stock R34.

[WogsRus]

first of all, did you plum the gizzmo in correctly, secondly i presume it is connected? LOL.

Ok do you know how to set the boost pressure?

Once you set the gain, you need to go and drive the car through the firts 3 gears hard, if you have a steep hill that helps better, as it loads tha car up more.

This will then give you a set pressure again the gain you have set, if you want more boost increase the gain, and vice versa. When seting boost make sure the responce is set to zero, only after the boost pressure is set, increase responce.

or read this

OK well I have one, and just about know the full ins and outs on this thing, have been stuffing with it for about 6 months.

Ok the way the controller works is to set a desired solenoid duty, this is how fast it opens and closes, the higher the number the higher the boost.

HOWEVER the number does not relate to boost directly. For example, 14 duty, does not mean 14 psi.

The controller is limited to what gate you have. If the stock gate is preset to 7psi, lowest setting you can run is 7 psi.

The way to preset the controller is as such.

Find a nice stretch of road, LONG and 100kph plus.

1) Hold down the top button for 5 seconds. Once this happens it will flash the number to preset the duty. For an R33, 10psi is about 45 duty, but this differs.

2)press down on the top button until the desired duty number is reached. START with 10.

3) After the duty has been preset, wait 5 seconds until the IBC goes back to monitor mode.

4) Once in monitor mode, take the car for a run, you need to load the car up good, so a WOT run in 2 and 3 will do, but you will go wayyy over 100kph so be careful. While accelerating keep an eye out on the boost to make sure you don't over boost.

5) after the run, press the controller top button, this will go to setting 2 for boost, then press the down button to go back to the previous boost setting. This will display the maximum boost reached.

6) If the boost reached is low 7psi, increase the duty of the solenoid, and then go for another run. Continue to do so until you reach the desired boost level.

Repeat step 1 onwards again.

7) If you want do this for 4 different setting. Just as an EXAMPLE on my car with all the mods listed, following duty corresponds to each boost 25=8psi, 35=10psi, 49=12psi, 67=14.5psi.

NOW once you get the duty set, it's time to set the response. This sets how fast you build boost, too much and you will over boost, tooooo little and it will be laggy.

1) Select the desired boost memory to work on.

2) Hold down the bottom button for 5 seconds

3) Once in the setting mode, increase the number. Start low say 5 and go from there. The higher the number the faster the boost will build.

HOWEVER

The number depends on boost reached. At 7 psi you will need a higher number to build fast boost, as the turbo is not very efficient at this low boost. So for example at 7 psi the response might be 30 but at 14 psi it will be 2.

If you set the response too high, the car will surge, the boost will rise and drop VERY fast, back off on the response for that particular boost setting.

HOWEVER if you have a mismatched wastage, and you have boost creep, you can minimize this by allowing some over boost on the controller. So what you do is set the response higher, so that the turbo over boosts, but by the time the IBC has reacted the wastage creep has caught up and boost remains steady.

IF you have BAD CREEP issues, reduce the DUTY of the solenoid by 4, and increase the RESPONCE by 2 or so. This will allow for some moor creep control by intentionally over boosting the initial boost setting.

Basically you want to set the response in such a way, that the gate opens 1 psi before the desired boost is reached, this can only be done by trial and error.

WHEN setting the response, you do not need to go for a drive and boot it, it will work itself out during normal driving.

SO I hope this covers it. HIHIHIHI

If anyone has any question PM me, I don't know if there are many people that have as much experience as me. I really went to town on this thing, as far as getting the functional description from the manufacturer to see how the thing works. LOL.

Forgot to add.

In Cold weather, you will have to reset the duty, colder air easier to compress, hence higher boost setting will occur, as the boost controller always monitor boost settings, so if you preset it to 12 psi, but on a cold night reach 13psi, it will always then try to go to 13 psi.

This is same for most controllers, which sux. BUT i found the gizzmo works well, sure it has it's downfalls, mainly that the boost can change depending on temperature, but it is fast, easy to use, well once you know how to and has great closed loop controll.

Same goes for hot eather, hot weather means harder to build boost, so lower boost.

[MR34GT]

Well firstly yes the controller is all wired up, but the problem im having is that no matter what duty cycle or gain i set the controller at eg: 80% duty cycle 50% gain, the car will still only go to 4.6psi max which is the number displayed on the gizmo controller as the max boost for setting 1. It just seems to me that the solonoid isnt closing so the boost would just be running the bare minimum of the wastegate.

[STATUS]

never had a problem with the gizzmo's ring ray 03 9357 7640 he is the designer and owner of gizzmo electronics and knows more about boost controllers and tuning than most worshops in aus put together.