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However, I'm getting off-and-on CEL for O2 Sensor (7 flashes) along with AFRO Fault annunciator. However, with using the CAN input, I seem to be reading legit AFR. Coincidentally, I am not getting readings from the G5 (innovate) gauge. LC2 controller shows green.
EGO correction also comes and goes.
If CAN AFR is correct, I am running much richer than expected, which would indicate that the Returnless FPR was running low pressure. I think this as it did seem I was running out of fuel on the 420cc injectors at lower power levels than most people report.
msq attached. Help Appreciated.
EDIT: I turned off CEL for O2 and I think that is helping. Only ran car for a few minutes so far this morning.
2ND EDIT (April 2017) This issue was the incorrect correlation between CAN default output during lack of signal, and the settings I had in the CEL section of the MS firmware.
Last edited by DNMakinson; 04-02-2017 at 04:06 PM.
General update:
Driving the car again is very satisfying. No sound barrier, in fact the aluminum piece over the gas tank is still out, as the next task is to install the roll bar. So, the car is quite loud. Now I understand the loud shifting noise I've heard on the race car videos.
3 issues:
1) I had sync errors documented here: Seemingly Random Sync Loss Turned out to be some kind of interference between the CAN O2 module and the MS, or some error in my wiring thereof. I went removed the CAN module and went back to analog connection and the faults stopped.
2) Possibly due to the hard lines? The CHRA and compressor housing keep rotating on the turbine housing and then the compressor outlet hits the body during deceleration.
3) Boost creep is really bad now. Two things changed: Now no leaks in the manifold, and I wonder if the item 2 above is allowing some sort of binding of the wastegate actuator. I suppose there could be other issues with the actuator. Anyway. 155kPa at about 3000 RPM turns into 175kPa at 7000 RPM (7.5 to 11 psi boost).
I tried to adjust the lines, but things returned to a bad place. I'll have to fully loosen everything, and tweak the lines so all is at rest when in the correct position.
The WGA doesn't seem bound when I try it, but things could be rotating when under load, and shifting back when I raise the hood.
Nope. I disconnected the WGA and wired open the WG fully. See picture. Then see the before and after logs. With WGA, 171kPa at about 7K. Without WGA, 164kPa at 7K.
See post #70 for how I have added divider to take advantage of the segregated downpipe. 1) Think I should remove it?
When I take the turbo off, I'll check for obstruction in the waste pipe.
2) Any other thoughts? @18psi has suggested that porting the TD04 is not helpful for boost creep.
3) Isn't this level of creep a bit excessive?
Picture of wastegate wired open.
Using a 7.5psi wastegate.
With WG wired open.
Before the manifold re-build, I could only build about 5psi with wastegate wired open. Should I presume that the manifold was leaking already at that time? Or is, perhaps and obstructed wastegate pipe a valid concern?
you're getting 10psi at redline with the wg wired open? something is def blocked
my guess is there wg bypass is being obstructed
Thanks for the quick reply. I could live with the 5 I had before, as goal was 7.5 WG only for other drivers (son, sons-in-law, etc) and the track; with 12-15 reserved on EBC for myself.
you're getting 10psi at redline with the wg wired open? something is def blocked
my guess is there wg bypass is being obstructed
Pulled the downpipe. No obstruction. Here are some pics of downpipe and turbine housing:
Seems like some porting of the WG path could yield some positive result.
I could take some or all of the divider out.
It would seem to me, that if I did pull the divider out of the exit housing, then I might as well delete the segregated dump tube and simplify the downpipe.
Which would you suggest? Port, remove divider, both, remove segregated dump?
I would take that divider out, bet it fixes the problem. I'd also port that internal gate as large as you can get away with, and radius the part where it goes into the turbine scroll as much as you can to let the gasses make a smooth turn. Doing both would likely fix it.
I would take that divider out, bet it fixes the problem. I'd also port that internal gate as large as you can get away with, and radius the part where it goes into the turbine scroll as much as you can to let the gasses make a smooth turn. Doing both would likely fix it.
Yeah, so if I remove the divider, is there any value in having the segregated downpipe? Or can I simplify it and not loose any performance?
Keep DP, it's giving it more area for gasses to flow out of the gate. Can only help. That divider looks like a wall blocking flow from the wastegate to me.
I went through quite a bit more effort to put a divider in mine and separate the DP than I would have with a bellmouth..... per... Corky. It better not have been a waste. I have nothing to compare to, so I have no clue, but I would think you should keep it. I ported the wastegate significantly and have no issues with creep on mine, and were running identical turbos. Although ive only had it fully/safley tuned for 12psi, It has seen 16psi a few times.
Also, my flapper hits the "flange adpater" I made for mine. You can see where I carved out as much relief as possible to get it to open more. That is a 3/8" thick plate and I ground it down to less than half its thickness by the wastegate hole there.
I went through quite a bit more effort to put a divider in mine and separate the DP than I would have with a bellmouth..... per... Corky. It better not have been a waste. I have nothing to compare to, so I have no clue, but I would think you should keep it. I ported the wastegate significantly and have no issues with creep on mine, and were running identical turbos. Although ive only had it fully/safley tuned for 12psi, It has seen 16psi a few times.
The segregated DP enhances turbine flow (cleaner outlet), but that is exactly what can lead to boost creep.
Pics of porting? Did you port the lead-in to the WG, or just open the hole? My flapper is about 2mm radius larger than the opening. How much land did you leave when you opened the WG hole?
I ported a substantial lead in, and the entire length of the WG "hole". I scribed the flapper outline onto the casting and then ground to within probably 40-60 thousandths of the scribe line.
Couldn't agree more with removing the divider, it really disrupts that whole "area" (Pat mentioned it). Leave the segregated dump tube alone. Not to mention, identical set-ups without the divider, don't have creep issues as you do.
11-02-2016, 10:51 PM
AFR Help Needed
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