12' GSR Boost Tuning
Feb 29, 2016, 09:34 AM
#1
12' GSR Boost Tuning
Having some issues with tuning my GM BCS. I'm doing load based tuning at the moment. I e-mailed Golden about a week ago to get some help converting to psi based, but never heard back.
Correction is disabled.
Active WGDC is set at 50% (was maxed at 100% on the stock tune).
The problem is I can't exceed 15 psi. I would like to hit 25 psi and hold around 22 psi till redline. I even tried to bump up the reactive solenoid up to 70% to get the boost up, but still can't exceed 15 psi. What am I missing here?
Correction is disabled.
Active WGDC is set at 50% (was maxed at 100% on the stock tune).
The problem is I can't exceed 15 psi. I would like to hit 25 psi and hold around 22 psi till redline. I even tried to bump up the reactive solenoid up to 70% to get the boost up, but still can't exceed 15 psi. What am I missing here?
Last edited by kiddsm95; Feb 29, 2016 at 09:39 AM.
Feb 29, 2016, 06:55 PM
#5
It is available in Golden's website:
http://goldenevo.com/evox_view.php?rom=62
Replace { } with < >
http://goldenevo.com/evox_view.php?rom=62
Code:
{table name="Atmospheric Boost" address="53488" category="Direct Boost" type="1D" scaling="psia16"/}
{table name="Boost Target #1A (High Gear Range)" address="58f09" category="Direct Boost" type="3D" swapxy="true" scaling="psia8"}
{table name="Throttle" address="6308a" type="X Axis" elements="9" scaling="Throttle_Main - Stored Minimum Throttle %"/}
{table name="RPM" address="63008" type="Y Axis" elements="18" scaling="RPM"/}
{/table}
{table name="Boost Target #1B (High Gear Range)" address="58fb3" category="Direct Boost" type="3D" swapxy="true" scaling="psia8"}
{table name="Throttle" address="6308a" type="X Axis" elements="9" scaling="Throttle_Main - Stored Minimum Throttle %"/}
{table name="RPM" address="63008" type="Y Axis" elements="18" scaling="RPM"/}
{/table}
{table name="Boost Target #2 (Low Gear Range)" address="5747d" category="Direct Boost" type="3D" swapxy="true" scaling="psia8"}
{table name="Throttle" address="6308a" type="X Axis" elements="9" scaling="Throttle_Main - Stored Minimum Throttle %"/}
{table name="RPM" address="63008" type="Y Axis" elements="18" scaling="RPM"/}
{/table}
{table name="Target Boost Error Correction" address="58d9c" category="Direct Boost" type="2D" scaling="OffsetWGDC"}
{table name="Boost Error" address="63032" type="Y Axis" elements="17" scaling="BoostErrorPsi"/}
{/table}
{table name="Variable for Boost Control 0xC7C2 -} 0xC766" address="2beca" category="Direct Boost" type="1D" scaling="Hex16"/}
{table name="SHLR-}SHLR2 0x5101 -} 0x5102" address="2becc" category="Direct Boost" type="1D" scaling="Hex16"/}
{table name="Boost Error RAM Address 0xC5D8 -} 0xC5D6 (is 0x8085D6 for logging)" address="2bef2" category="Direct Boost" type="1D" scaling="Hex16"/}
{table name="Boost Error RAM Address in Load Error Table 0xC5D8 -} 0xC5D6" address="6302e" category="Direct Boost" type="1D" scaling="Hex16"/}
Feb 29, 2016, 10:06 PM
#7
Sounds like you are on wastegate pressure. 50 WGDC on a GM 3 port should be giving you 20psi+ on the stock turbo and 70 WGDC for sure will exceed 20psi.
PSI based boost isn't going to change that.
You either have a bad solenoid or you hooked it up incorrectly.
PSI based boost isn't going to change that.
You either have a bad solenoid or you hooked it up incorrectly.
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Mar 1, 2016, 12:39 PM
#9
Do some tests with 0 and 50 WGDC and see if there is any difference.
You can also blow through the right port with the solenoid disconnected and check if air exits from the top left port only. With solenoid powered on, you should not be able to blow through the right port and if you blow through any of the left ports, the air should exit from the other left port.
You can also blow through the right port with the solenoid disconnected and check if air exits from the top left port only. With solenoid powered on, you should not be able to blow through the right port and if you blow through any of the left ports, the air should exit from the other left port.
Mar 1, 2016, 01:48 PM
#11
Good eye. I wondered if anyone would catch that. I didn't get enough hose and had to splice in some stock line.
No pills, and it's about an 8" section that connects to the new tubing.
I did some pulls over lunch using psi based, and I was getting mad boost spikes (32 psi). It was because I started from the stock map, and converted to psi based.... but forgot to lower my WGDC to 50%.
Once I did that I also changed my atm boost down to 14.7 psia, set my boost tables to 20 psi across the board. I was able to hold 17~18 psi till redline, but when I checked the datalog I had 3-4 counts of knock I need to address. Over the course of an hour I could only get in 2 pulls. Sunnyvale traffic during lunch sucks!
Looks like the problem was my load based tune was so jacked up.
No pills, and it's about an 8" section that connects to the new tubing.
I did some pulls over lunch using psi based, and I was getting mad boost spikes (32 psi). It was because I started from the stock map, and converted to psi based.... but forgot to lower my WGDC to 50%.
Once I did that I also changed my atm boost down to 14.7 psia, set my boost tables to 20 psi across the board. I was able to hold 17~18 psi till redline, but when I checked the datalog I had 3-4 counts of knock I need to address. Over the course of an hour I could only get in 2 pulls. Sunnyvale traffic during lunch sucks!
Looks like the problem was my load based tune was so jacked up.
Mar 2, 2016, 01:24 PM
#13
Swapped out the OEM vacuum hose, just because I had to anyways.
Log0057 boost curve looked pretty good and flat, so I bumped up the WGDC from 50% to 75%. I did this because the specified boost under "Boost Target #1A" was set to 22.8 psi tapering down to 20 psi.
However you can see I hit 21 psi and tapered down to 15.5 psi.
Upped the WGDC to 75% and Log0058 & 0059 shows my boost curve got all crazy.
On Log0059 I hit 29.7 psi when correction kicked in -10. There's also crazy knock at redline. This is the stock timing map and I obviously need to trim the timing back quite a bit.
I don't have Tephra ROM's for 58010005, so I'm modifying my stock maps. Is there a patch I can include that will flash the CEL when I hit a pre-defined knock sum? I had a similar feature on my DSM CeddyMod ROM. It would be nice to know my engine has 11 counts of knock while its happening, as opposed to afterwards.
I'm going to reduce timing so I can eliminate the knock at redline. What is going on with my boost curve?
Log0057 boost curve looked pretty good and flat, so I bumped up the WGDC from 50% to 75%. I did this because the specified boost under "Boost Target #1A" was set to 22.8 psi tapering down to 20 psi.
However you can see I hit 21 psi and tapered down to 15.5 psi.
Upped the WGDC to 75% and Log0058 & 0059 shows my boost curve got all crazy.
On Log0059 I hit 29.7 psi when correction kicked in -10. There's also crazy knock at redline. This is the stock timing map and I obviously need to trim the timing back quite a bit.
I don't have Tephra ROM's for 58010005, so I'm modifying my stock maps. Is there a patch I can include that will flash the CEL when I hit a pre-defined knock sum? I had a similar feature on my DSM CeddyMod ROM. It would be nice to know my engine has 11 counts of knock while its happening, as opposed to afterwards.
I'm going to reduce timing so I can eliminate the knock at redline. What is going on with my boost curve?
Mar 2, 2016, 02:12 PM
#14
Wow, be careful. Are you sure you don't want some professional help? There are many tuners around who can assist you.
In my opinion, you should:
1) Restore your Boost Error Correction values back to stock
2) Set all your Max Total Upward WGDC Correction vs TPS values to zero
3) Set your "boost target" tables a bit above your desired final curve
4) Reduce your base WGDC values
After that, SLOWLY increase your WGDC tables to achieve your desired boost curve.
In my opinion, you should:
1) Restore your Boost Error Correction values back to stock
2) Set all your Max Total Upward WGDC Correction vs TPS values to zero
3) Set your "boost target" tables a bit above your desired final curve
4) Reduce your base WGDC values
After that, SLOWLY increase your WGDC tables to achieve your desired boost curve.
Mar 2, 2016, 04:00 PM
#15
Wanting professional help and paying for it is a different story. I recently moved to CA (Bay area), bought a house, single income, dual kids. If a professional tuner would graciously donate their knowledge I'd deeply appreciate it. Otherwise I'm kind of on my own.
I will follow your advise you listed below and report back tomorrow because I usually leave my car at work and take the train to work/home. So I can only do logs during my lunch break.
Traffic here sucks.
I will follow your advise you listed below and report back tomorrow because I usually leave my car at work and take the train to work/home. So I can only do logs during my lunch break.
Traffic here sucks.
Wow, be careful. Are you sure you don't want some professional help? There are many tuners around who can assist you.
In my opinion, you should:
1) Restore your Boost Error Correction values back to stock
2) Set all your Max Total Upward WGDC Correction vs TPS values to zero
3) Set your "boost target" tables a bit above your desired final curve
4) Reduce your base WGDC values
After that, SLOWLY increase your WGDC tables to achieve your desired boost curve.
In my opinion, you should:
1) Restore your Boost Error Correction values back to stock
2) Set all your Max Total Upward WGDC Correction vs TPS values to zero
3) Set your "boost target" tables a bit above your desired final curve
4) Reduce your base WGDC values
After that, SLOWLY increase your WGDC tables to achieve your desired boost curve.