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Old 08-14-2003, 09:05 AM   #1
QfactorRS
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Question blitz sbc-id 2 tunning pointer?

hey guys

i just installed the sbc-id II in my RS-T, and i am having trouble with setting it up right.

i have a 5 psi external wastegate spring. i am looking into running around 7 psi for now.

I set Ch1 to Auto, 7psi, 0 gain. Pressure went up to 9 psi.

i am not sure i understand the whole gain deal.

I have the instruction manual, and i am a mechanical engineer, but i am obviously not understanding something.

Q
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Old 08-14-2003, 03:33 PM   #2
2NRwagon
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the boost controoler is much more accurate in Manual mode. Sart with the gain as low as possible then and floor it in third gear. see what the boost hits then slowly increase the gain until it hits the boost level you want. it like adjusting a manual boost controller, trial and error. once you go the boost set start turning up the "set" on it , this can make more bottom to mid range power but in some cases it might spike the boost for a second. Keep in mind the higher the "Set" point the more it will spike. to see how much it spikes veiw the boost on graph mode. hope this helps and don't give up on the controller cause it's pretty bad ass. especially when you start controlling boost by speed with the power meter.
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Old 08-20-2003, 08:30 AM   #3
QfactorRS
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thanks for the info, i'll try it at lunch time.

Q
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Old 08-21-2003, 06:01 AM   #4
tk_1971
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Gain should be 5 or 6 to start out with. Make sure you have enough room and have at it 2 or 3 times in auto. It will over or under boost the first couple of times, while the controller learns your turbo boost characteristics. Usually, it'll underboost, then creep up to your setting. Manual is great for the track, but for everyday driving, auto (after it learns your turbo's characteristics) is better (adjusts for temperature and altitude changes). Auto also boosts up slower, but this ensures that you don't overboost. Just remember, everytime you make a change in the channel set on auto (boost or gain), it'll need to re-learn your turbo. Good luck.
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Old 08-21-2003, 08:10 AM   #5
QfactorRS
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ok, cause i was in auto and it just over boosted all morning on my way to work??

I tried the manual mode, and it still overboosts a lot!!

So i should set gain to 5 or 6 in Auto mode along with the desired boost setting?

also should i select AC or WG? I have an external wastegate?

thanks for all the info, i really want that thing working.

Q
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Old 08-22-2003, 04:46 PM   #6
2NRwagon
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IF the booost controller is not in WG and you have an external wastegate that could be a big reason why it's over booosting. Also make sure you route the vacuum lines the right way. It's not like the standard internal waste way. As long as you start low, the boost should not go over stock spring pressure. just slowly increase the gain. Example. my car has an external HKS standard wastegate with a .75 (11 psi) spring. I have my boost at 16 psi and the gain is up to 46 while the set is at 15. With the set at 15 the booost spikes a littlle but the car make a lot of mid range. hope this helps.
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Old 08-25-2003, 08:18 AM   #7
QfactorRS
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here is what i experimented over the weekend.

i only played with the Auto mode for now

i set 8psi and 6 gain on WG, i thought it was fine for a day, WOT go up to 8.1psi or so.

Then the next day, it was all over the place, 11 and 10.5 psi on some WOT runs. so i started playing with the gain setting, ranging from 6-40, but everytime i was getting overboost.

anymore ideas, i am unfortunately getting frustrated at not beign able to tune this little magic box.

Q
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Old 08-25-2003, 01:42 PM   #8
tk_1971
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Anytime you change anything on a particular channel (gain, PSI, etc), the controller will be in "learning" mode all over again. So after the first day (when everything was fine), did anything change on that channel? If so, then it will behave like it did the first day when it was learning (over/under boosting, etc.).

good luck
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Old 08-25-2003, 03:01 PM   #9
QfactorRS
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nope no changes from one day to another.

I am gonna try again today w/:

- manual
- set 2
- gain 25

and let it learn this over the next few days. We'll see how it goes.

Q
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Old 08-27-2003, 01:32 PM   #10
tk_1971
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In manual mode, it does not learn anything. What you set it to is what you get.

What kind of turbo are you running? External wastegate? Sounds like maybe you should use a lower gain setting. Try 2 on Auto (yes I like the auto setting alot) and auto for 8psi. You need to make sure your settings have not changed after you turn off your car (a remote possibility). Make sure you are setup for external wastegate (maybe somehow this changed back to default?).

Don't forget to set your safety alarm to maybe 8.5, then you don't have to worry about overboosting so much.

Good luck.
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Old 12-18-2003, 05:42 PM   #11
WolfDrive
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For those of us with pretty much stock settings on the car but an SBC loaded up... what settings should we use? Low/High Gain? Auto set to what PSI? I'm even interested in maybe two channels, one for low boost and one for high boost.... or if anyone has any suggestions for a speed map, please inform us on this one. Thanks guys! Lots of good info here but I'm still confused.
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