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Old 08-30-2007, 12:38 PM   #251
Rene2.5RS
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Quote:
Originally Posted by Hyper View Post
so is this "normal?"
I've been reading everywhere that I need to drop WG, but my case has been exactly the opposite...

top - initial and max WG STOCK
bottom - initial and max WG ADJUSTED for Prodrive 3 port

when left at stock WG map, the boost was only able to climb to 14psi!

I also used hoses from the stock solenoid

I got the unit (prodrive 3 port) used from a fellow member, could it be faulty? If it was, would it be boosting at all?
This is what I have done with mine. Is it normal I have no idea. Like you said everyone says lower you WGDC by 25-30% and start tuning from there. I saw almost no need to lower DC and raise them in certain areas.

I also went with 5/32" silicone vacuum line.

The screen shot top to bottom is:

1. Pre-GMBCS - 18psi tapering to 10psi at redline
2. My First working revision - 18psi tapering to 10psi at redline
3. My current map - 20psi tapering to 13psi at redline



-Rene
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Old 08-30-2007, 01:19 PM   #252
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Quote:
Originally Posted by Hyper View Post
so is this "normal?"
I've been reading everywhere that I need to drop WG, but my case has been exactly the opposite...

top - initial and max WG STOCK
bottom - initial and max WG ADJUSTED for Prodrive 3 port






when left at stock WG map, the boost was only able to climb to 14psi!

I also used hoses from the stock solenoid

I got the unit (prodrive 3 port) used from a fellow member, could it be faulty? If it was, would it be boosting at all?
If you used the stock hoses chances are you don't have it hooked up right. Read the directions again.
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Old 08-30-2007, 01:37 PM   #253
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I don't have the restrictor pill in.... there are just 3 hoses, all connected according to this site

what could be installed wrong?
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Old 08-30-2007, 01:42 PM   #254
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Quote:
Originally Posted by Hyper View Post
I don't have the restrictor pill in.... there are just 3 hoses, all connected according to this site

what could be installed wrong?
Did you use the stock T fitting? If you used stock lines I don't see how you could have hooked it up right. Maybe I'm wrong.
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Old 08-30-2007, 01:45 PM   #255
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of course not
I disconnected the T part and just used the long hose to reach turbine, used intake hose to connect to WG, used another hose I had somewhere to connect to intake
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Old 08-30-2007, 03:17 PM   #256
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Quote:
Originally Posted by paktinat View Post
for anyone looking into this here is a graph showing the improved spool with the GM BCS


three setups were
stock BCS + free XPT stage 2 map
GM BCS + Ziggy's free stage 2 map
GM BCS + $77 XPT map

this is 3rd gear WOT
What's this free Ziggy GM BCS map you speak of? I need something for when I stick the GM BCS on before I sink $80 on a map.
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Old 08-30-2007, 03:45 PM   #257
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Quote:
Originally Posted by Superorb View Post
What's this free Ziggy GM BCS map you speak of? I need something for when I stick the GM BCS on before I sink $80 on a map.
http://www.xpttuning.com/osecuroms/viewtopic.php?t=528

for the '04, dont see one for your '02
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Old 08-30-2007, 11:50 PM   #258
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Figures. Thanks anyways
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Old 08-30-2007, 11:58 PM   #259
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Quote:
Originally Posted by Superorb View Post
Figures. Thanks anyways

Get the XPT map, you will be very happy.
I am.
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Old 08-31-2007, 10:36 AM   #260
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Quote:
Originally Posted by paktinat View Post
Get the XPT map, you will be very happy.
I am.
$80 for a map right now is a bit much when A/C needs to be fixed ASAP. Gotta save save save
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Old 08-31-2007, 04:05 PM   #261
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So, at what point would an 04 STi need an after market Boost Control Solenoid???

Quote:
Originally Posted by fmowry View Post
Because it's an issue that didn't exist with the 04s

"The 02-04 pills allowed for pretty good boost control (thus why I had never needed it), but now, if it's an '05, or one who lost their pill, we simply just install these and tune them."

It's catching on with me because I'll be running more boost with alky on my green. Currently the stocker is fine.

Frank
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Old 08-31-2007, 04:19 PM   #262
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ive been having problems with my setup with boost fluctuation. It acts like its overboosting but it isnt. The WGDC will go up and down along with the boost, but its not going over my 20.67 psi that I have it set at.

Code:
A/F	Load	RPM	IAM	Timing	Knock	PSI	MAF	WGDC	Throttle
11.25	3.31	3966	12	17.5	7	8.56	110.88	52.55	100
11.25	4.09	4312	12	15	7	13.49	142.13	57.25	100
11.25	5.01	4581	12	9.5	7	19.88	195.18	54.9	100
11.25	4.78	4908	12	10.5	7	20.6	194.41	47.84	100
11.25	4.43	5112	12	12.5	7	17.12	190.41	54.51	100
11.25	4.72	5411	12	12	7	17.27	215.29	55.29	100
11.25	4.75	5712	12	11.5	7	18.57	224.72	54.51	100
11.25	4.64	5952	12	12.5	7	17.56	229.23	53.33	100
11.25	4.48	6239	12	15.5	7	16.69	231.7	51.37	100
11.25	4.39	6432	12	15.5	7	15.96	228.41	49.8	100
11.25	4.28	6550	12	15.5	7	15.53	234.67	48.24	100
11.25	4.13	6720	12	16.5	7	15.09	237.68	47.45	100
11.25	0.46	7069	12	17.5	6.5	14.51	235.95	42.35	0
14.59	3.66	6438	12	19.5	3	3.48	172.08	42.35	100
11.25	4.78	5016	12	10.5	7	16.4	198.98	52.55	100
11.25	4.86	5190	12	10.5	7	19.88	211.67	48.63	100
11.25	4.62	5241	12	11.5	7	18.28	204.75	52.94	100
11.25	4.81	5308	12	11	7	17.99	215.29	55.69	100
11.25	4.93	5610	12	10.5	7	19.01	229.64	54.12	100
11.25	4.81	5630	12	11	7	18.72	225.54	53.33	100
11.25	4.77	5756	12	11.5	7	17.99	228.82	52.94	100
11.25	4.67	5850	12	11.5	7	17.85	228.82	52.16	100
11.25	4.65	5952	12	12.5	7	17.56	234.67	51.37	100
11.25	4.61	6102	12	12.5	7	17.27	233.38	50.2	100
11.25	4.52	6208	12	13	7	16.98	233.81	49.8	100
11.25	4.47	6292	12	15	7	16.69	233.81	49.02	100




if you look, it does have the wastegate doing one dip, but i did that because it helped the fluctuation. its worse when i have it going straight down.

Last edited by KAX; 08-31-2007 at 04:40 PM.
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Old 09-05-2007, 04:12 PM   #263
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Quote:
Originally Posted by KAX View Post
ive been having problems with my setup with boost fluctuation. It acts like its overboosting but it isnt. The WGDC will go up and down along with the boost, but its not going over my 20.67 psi that I have it set at.
Your proportional is too aggressive. Multiply all the values by about 0.7. If that doesn't get rid of it, also multiply your integral maps by 0.8.

The stock shape of the map is fine, it's just the values need to be calmed down because the interrupt BCS is more reactive. Smaller changes in duty make bigger changes in boost.
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Old 09-05-2007, 04:24 PM   #264
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so i need to bring down my duty cycles percentages? wont that hurt me by not making target boost?
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Old 09-05-2007, 04:56 PM   #265
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PROPORTIONAL TURBO DYNAMICS. It's too HOT. Too AGGRESSIVE.

If your proportional looks like this:
Code:
-5, -2, -1, 0, 1, 2, 5
You'd do something like this:
Code:
-3.5, -1.5, -0.75, 0, 0.75, 1.5, 3.5
See what I'm getting at here? This is NOT the same as lowering your wastegate duty! It's just the reactionary, closed loop feedback controls.

Do NOT change the row header values (the top row, the boost error values). Just the bottom row.

Give it a shot. It should fix your problem. Try doing that to proportional first. If you still have oscillation, do it to integral as well.
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Old 09-05-2007, 08:45 PM   #266
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ok. i see proportional gain and proportional continuous (im guessing continuous is integral?)

im not down with the lingo yet
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Old 09-05-2007, 09:15 PM   #267
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Yeah they could be mislabeled. You might want to make sure you're on the lastest version of Enguinity and the latest defs. I thought Tea Cups/Merch God renamed them back.

They really are proportional and integral. It's a standard closed loop controller type called "Proportional Integral Derivative controller" though we don't get a derivative term (generally not needed if your system is setup right). You can find an abundance of information online about them, or get a book on control theory.

You might want to go back and read some of my posts in this thread. I've written about these issues a lot.
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Old 09-05-2007, 09:23 PM   #268
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will do, thanks for the help!
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Old 09-10-2007, 04:21 AM   #269
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very informative post!
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Old 09-25-2007, 01:48 AM   #270
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subcribed i like this thread
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Old 09-25-2007, 01:57 PM   #271
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Is there an 02 GM BCS XPT map for 93 octane, or only 91? Anyone know?
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Old 10-08-2007, 12:26 PM   #272
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I've been though the thread, and I still dont' quite understand the wiring. I'm wiring this to a LINK LEM Ecu. So am I understand this right: one wire from the BCS harness goes to my ECU, and the other just goes to a ground?
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Old 10-08-2007, 01:18 PM   #273
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You should hook up both wires to the existing ones. Thats what I did. No problems yet.
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Old 10-08-2007, 04:21 PM   #274
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Quote:
Originally Posted by Grayguy View Post
I've been though the thread, and I still dont' quite understand the wiring. I'm wiring this to a LINK LEM Ecu. So am I understand this right: one wire from the BCS harness goes to my ECU, and the other just goes to a ground?
I wrote the FAQ with the stock ECU in mind.

The solenoid needs to be fed with a 12v pulse-width modulated signal. Same type of signal as the stock soleniod. It would be hooked up the same if there are instructions for hooking up the stock solenoid.
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Old 10-08-2007, 08:32 PM   #275
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well I guess that's the issue then, I don't know how the stock one is wired. Let the searching begin....
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