Brettus Turbo install thread
11-23-2008, 08:04 PM
#151
Ok -that did the trick pretty much , although there is still a bit of overshoot by about 0.7 psi .
Set it at 0 - now seeing 10psi all the way through to 6500 . It then drops off pretty quickly to about 8.4 at 7000 .
Not sure if that is the turbo , the actuator spring the aux. intake valve opening , the pressure drop though the pipework or a combo of all four things .
This boost controller tuning is almost as difficult as the actual engine tuning .
Set it at 0 - now seeing 10psi all the way through to 6500 . It then drops off pretty quickly to about 8.4 at 7000 .
Not sure if that is the turbo , the actuator spring the aux. intake valve opening , the pressure drop though the pipework or a combo of all four things .
This boost controller tuning is almost as difficult as the actual engine tuning .
11-23-2008, 10:51 PM
#165
so kimi is a *** hag? i find that a waste!! 
bret, good job on getting it installed on the right / wrong side.. and right now i would take my time and learn before i jump. 
i would get it dialed in on the track with temps and control.. as i know that is your passion..
then i bet lots of stuff will be available. just a guess.
beers
bret, good job on getting it installed on the right / wrong side..
and right now i would take my time and learn before i jump. i would get it dialed in on the track with temps and control.. as i know that is your passion..
then i bet lots of stuff will be available. just a guess.
beers
11-24-2008, 07:34 PM
#168
Just thinking about the aux ports and the benefit of opening them earlier .
I see that the P2s are linked to the aux. port so they come on at same time so only way to effectively do this is through the computer .
There was a thread about this a while back but they did not come to any real conclusions. I think there was no way to do it effectively then - now there is .
If I can get them both activating earlier i think there would be the following benefits
* a bit more power earlier + eliminate the power drop at this point
*eliminate the lean spike at 6250
*Stage the P2s earlier so that the secondaries are not at 100% duty cycle in this rev range .
*Hold a higher psi for longer
Just my thoughts at this stage
I see that the P2s are linked to the aux. port so they come on at same time so only way to effectively do this is through the computer .
There was a thread about this a while back but they did not come to any real conclusions. I think there was no way to do it effectively then - now there is .
If I can get them both activating earlier i think there would be the following benefits
* a bit more power earlier + eliminate the power drop at this point
*eliminate the lean spike at 6250
*Stage the P2s earlier so that the secondaries are not at 100% duty cycle in this rev range .
*Hold a higher psi for longer
Just my thoughts at this stage
11-24-2008, 07:42 PM
#169
Dannobre just took them all out together... all open all the time.
The idea being that lag time until we hit boost is so damn short; than any lower end power loss is easily made up by getting and keeping higher airflow in boosted situations.
But if you wanted to be a pure Mazda engineering guy; with TC - figure out the airflow that they open them stock; and then figure out when that is for your new FI-ed-ness.
The idea being that lag time until we hit boost is so damn short; than any lower end power loss is easily made up by getting and keeping higher airflow in boosted situations.
But if you wanted to be a pure Mazda engineering guy; with TC - figure out the airflow that they open them stock; and then figure out when that is for your new FI-ed-ness.
11-25-2008, 07:33 PM
#173
Just opened those ports using a bit of Kiwi cunning
Now have to re-tune cause it has changed things around a bit .One thing that was immediately obvious -my vac at idle went down a good 2"Hg . Thought i had blown my motor for a min. but when I reopened the valve the vac came back ...
Now have to re-tune cause it has changed things around a bit .One thing that was immediately obvious -my vac at idle went down a good 2"Hg . Thought i had blown my motor for a min. but when I reopened the valve the vac came back ...
11-25-2008, 09:59 PM
#175
Ok I'm finished dicking around with my boost controller and dont like the result i'm getting . IE too much torque lower in the rev range .
Never thought i would say that - heh .
what I want to do is bring in the boost at about 7-8psi then gradually increase it to 10 psi at the top end up until the turbo runs out of puff .
My powermod has an inbuilt boost control and It looks like it may be capable of doing that , it will only output 1A though so not sure if that is sufficient - any one done something similar ?
Also found I had to add fuel after opening the aux valve - implying a few extra ponies are being made .
But It does not drive as well - idle is sporadic and the flat spot at 4k is worse than before .
So I'll leave them operational until Hymee can figure out how to open them earlier
Never thought i would say that - heh .
what I want to do is bring in the boost at about 7-8psi then gradually increase it to 10 psi at the top end up until the turbo runs out of puff .
My powermod has an inbuilt boost control and It looks like it may be capable of doing that , it will only output 1A though so not sure if that is sufficient - any one done something similar ?
Also found I had to add fuel after opening the aux valve - implying a few extra ponies are being made .
But It does not drive as well - idle is sporadic and the flat spot at 4k is worse than before .
So I'll leave them operational until Hymee can figure out how to open them earlier
Last edited by Brettus; 11-26-2008 at 12:17 AM.