Boost Error Gone Wild
I am always late to the party. Who else has had trouble using this method with a restrictor pill? Who has had success? I have been implementing this and don't need to waste time chasing my tail.
If you want to have the best ECU boost control, do yourself a favor and pick up a 3 port. my .02
If you want to use the pill method, then you are better off using load based boost control rather than psi (direct) boost control.
The pill method does NOT work with this method. I tried with the help of mrfred and it did not work. We got the boost perfect in 3rd gear, but then when we tested it in 4th gear, the ECU was pulling boost like crazy.
No it is not the source of the problem. The source of the problem is that direct ECU boost control does NOT work with the restrictor pill method. mrfred and I tried to make it work, but we failed. It works with the GM 3 port solenoid and the boost bleeder method that mrfred uses to control boost, but it does not work with the restrictor pill in the boost line method.
EvoM Guru
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From: Tri-Cities, WA // Portland, OR
I haven't tried tuning an Evo with a #65 pill at the tee, but my experience in working with nj1266 and Pd1 is that its hard to control the initial boost spike with this setup. Since I don't have any boost spike issues at all, the anecdotal conclusion is that a bleeder works better.
Last edited by mrfred; Jan 21, 2008 at 03:42 PM.
I haven't tried tuning an Evo with a #65 pill at the tee, but my experience in working with nj1266 and Pd1 is that its hard to control the initial boost spike with this setup. Since I don't have any boost spike issues at all, the anecdotal conclusion is that a bleeder works better.
EvoM Guru
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From: Tri-Cities, WA // Portland, OR
Good to hear that the #65 pill is working for you. I think it would be great if someone could try both the bleeder method and the pill method. razorlab, are you reading this. ;-)))
I would think the GM 3 port is a simple compromise to utilize this system. It is a very easy install and if it works why try to find another method. My $.02 anyway, especially if you need to get the stock pill out, might as well switch to the GM 3-port.
These settings work very well for me. I use a #60 pill and I shoot for 25psi and spike to 26 in 4th and 5th gears.
You'll note the boost error correction is offset so the underboost areas add more than the overboost areas take away... and I also ignore overboosts of 0.3psi.
You'll note the boost error correction is offset so the underboost areas add more than the overboost areas take away... and I also ignore overboosts of 0.3psi.
That boost error correction table is way too much. It should be lower, like this..
-4.0---0
-3.5---3.0
-3.0---2.5
-2.5---2.0
-2.0---1.5
-1.5---1.0
-1.0---0.5
-0.5---0
0
0.5---0
1.0---(-0.5)
1.5---(-1.0)
2.0---(-1.5)
2.5---(-2.0)
3.0---(-2.5)
3.5---(-2.0)
4.0---(-2.0)
This is how i would do it. You shouldnt even try to correct .3-.8 psi off. Pullin a point of WGDC will drop boost more then 0.5 psi. Also sometime the correction lags like touringbubble said. etc.
Also having a lower number in the most lower cell will help with spikes. If you have a big number there and it spikes the correction will most likely always pull to much, so keep this number low.
-4.0---0
-3.5---3.0
-3.0---2.5
-2.5---2.0
-2.0---1.5
-1.5---1.0
-1.0---0.5
-0.5---0
0
0.5---0
1.0---(-0.5)
1.5---(-1.0)
2.0---(-1.5)
2.5---(-2.0)
3.0---(-2.5)
3.5---(-2.0)
4.0---(-2.0)
This is how i would do it. You shouldnt even try to correct .3-.8 psi off. Pullin a point of WGDC will drop boost more then 0.5 psi. Also sometime the correction lags like touringbubble said. etc.
Also having a lower number in the most lower cell will help with spikes. If you have a big number there and it spikes the correction will most likely always pull to much, so keep this number low.
So maybe i am being stupid or missing something but my BEC will not let me enter -4 either manually or just hitting the "-" button when the cell is highlighted. in fact it wont let me go past -3.1