Rralliart09

What would be considered over boosting? How high IS too high?

richardjh

The 93oct TBE maps have target boost set at 23.2psi (4000-5000rpm). After that, the boost targets taper off (21.1psi @ 6000rpm, 16.8 @ 7000rpm).


Bryan can comment on the TBE tune mixtures. Me, I'd be okay with mid-11s, but not so comfortable with high 11s... if you're talking about a "non-personalised" base map tune.

Rich

Rralliart09

I got that backwards. I meant low 11s like 11.2 11.3. My boost gauge recall shows my peak boost was 23psi and it does taper off. So it's working as it should. I gotta send you a donation now that I'm done with the build. Seriously the GST base map is awesome. I could use some help on logging though. My AFR controller is a prosport and has a three wire lead that says it's for logging. One end plugs into the controller and the other it just three bare wires. What do I do with those wires?

richardjh

Ah, well, that's a whole different kettle of eggs! Low 11.2-11.3 is a great place for it to run, right out of the box.


No idea! I use Innovate LC-1, and don't have direct experience with other brands. Not a pro tuner, you see. I'm just the software geek. :P

Rich

ExRotary

I've caught the modifications bug! SpoolinUp is selling GM 3 ports and harnesses for bugger all and I couldn't help myself. One should be on its way shortly.

I am currently running the boost pill base map v31.003. Any pointers out there as to a suitable set of initial adjustments that should be done to start things out in safe territory?

I haven't thought this thing through nearly enough yet. On first look I figure:

1. At zero WGDC I expect that the 3 port and 2 port systems (stock & boost pill) will perform identically - full boost pressure is applied to assist the wastegate to open.
2. At 100% WGDC the stock system will apply the largest portion of boost pressure to the wastegate, the boost pill will apply less of the boost pressure to the wastegate, and the 3 port will apply no boost pressure to the wastegate.
3. Therefore, at any point in the boost/rev range I would expect that the 3 port would require less WGDC than the boost pill settings in order to achieve the same outcome
4. So the safest thing might be to start at 0 WGDC and work up.

Now my head hurts and I need little lie down.

Exige90

iTrader: (1)

The 3rd shot is when I accidentally hit 'start logging' without it plugged into the car. Forgot to mention that.

I'll try those steps when I get a chance. I hadn't done anything like that. If all that is working as intended, would that fix my reading issues? No matter what I've done it's read 35k RPM and 420lb of boost every time. Logging to computer or to the SD card.

richardjh

Yep, you've got it. Start at 0% to get a sanity-check of your installation. You should run wastegate pressure only, eg. around 10-11psi.

Then work up in stages, keeping it safe. Like, 20% across the board.

Here's an excerpt of something I wrote in another thread, showing how I tune my own boost (and my boost control setup seems to have made it into the v3.1 base maps :P)...


Checking Boost Levels - The Easy Way

There are many different ways of setting, managing and fine-tuning boost. The v27 Base Maps work use one particular method, and the notes below work well for that specific method. It may not translate effectively to other boost tuning approaches... but I'm keeping it tightly focused here! So here goes...

The initial WOT boost peak is the key to fine-tuning your overall boost.




Check it like this:
In 3rd gear, SPORT MANUAL mode, coast down with no throttle.
When you reach a set rpm, apply full throttle.
Let boost build, peak and level out.
Get off the throttle.
Review.
Your "set rpm" for starting such tests should be 2000rpm, 2500rpm, 3000rpm, 3500rpm, 4000rpm.

The initial "peak" boost level is predominantly determined by your BWGDC table. Sure, there is error correction processing active in the ECU, but your spool-up occurs so fast there's no chance of it "catching" an overboost condition and getting the wastegate to somehow open on-target. Won't happen.

On initial spool-up, your wastegate-open point will be driven by your BWGDC Table, pure and simple.

So perform WOT spool-up tests, and check your initial peak.

-------------------------------------------------------------------------------------------------


The other thing to realise is that your boost error correction table may need revising for a 3-port. That's "Direct Boost" / "Target Boost Error Correction". You might find smaller values work better, as the 3-port is more sensitive.

I reckon you should spin this off into a separate thread. It'll get lost in this GST Base Map mega-thread, and isn't really on-topic once you start using a 3-port.

Rich

DJEllipse

i just flash the 09 ralliart with boost-pill map on a friend's ralliart, but we're having a problem. The boost is not "soft"

when i check on virtual Dyno, i got a wave....

car is stock, exept boost-pill and drop-in

https://www.mediafire.com/folder/k8hyvfw1gg1rd/

Here's both pull

3rd gear pull


4th gear pull


Any Queue ?

ExRotary

^ Wow 337Hp on a boost pill. Oh, its at 4,000 rpm --- just set your redline to 4,500 rpm and reset your expectations.

I dunno. I'm just a beginner too.

Its likely to be something pretty obvious. Let me guess:

• BoostPill in wrong leg?
• Boost Pill blocked?
• No hole in boost pill?
• Hose blown off?
• Hose never connected?

If none of those is obviously wrong, I'd start to suspect the wastegate. I'd go back to the stock pill, flash the Stock RA GST basemap (get the v31.003 map - link at the top of page 1), switch to RAX logging, and start doing part throttle pulls, pulling out early in the rev range then work up from there.

When you sort it settle back and have a laugh. There is no sign of serious knock in your 2 logs. You probably haven't damaged anything .... yet.

tencents

WOW 28psi? Did you see any smoke coming out? I see high knocks of 8,9 and 12 too..
Try using Rax fast logging.
Either logging isn't right or you have serious issues man.
Im guessing your over boosting and ecu is trying to correct things to bring it down and a repeated pattern of overboost and correcting on and on.
Maybe redcue WGDC?
I'm just guessing.. better wait for the experts to chime in.

DJEllipse

Got told by our in house tuner Kassender that is might be : Or a exaust manifolt leak, or a boost leak. he's gonna give it a check this week, he's putting his car on standby for now.

At least i'm happy we've find one of the problem. Car was tuned when previous owner had it, and he put it back to stock, without removing the boost-pill....so this is fixed, but now, gotta fix the weird boosting

richardjh

Urk. Those look pretty bad. Glad you've got a tuner there in person to sort it out.

Rich

DJEllipse

Good news ! (If i can say so) there's a crack on the exaust manifold ! So now we probably know where's the problem coming from ! he's trying to fix that by the end of next week, we'll keep you informed ^_^

ExRotary

Crack in the manifold causes total loss of boost control?

I reckon that there will be other problems to track down once that is fixed.

Rralliart09

You would think that wilt cause a drop in boost, not an increase. No?