yes, I can add fuel in closed loop and it will stay at 13.5, but then when I hit open loop in those same cells, I get 10's on my AFR. So it doesn't work out for me very well.

When I zeroed all the cells in the 7th, I started to get a little more ping and had to add more retard to the low RPM cells. Honestly I don't really know how to get the timing right. I read the URD docs, but it is kind of vague. Tuning by ear can't be optimal.

Speedy, can you copy your timing and fuel maps to a spread sheet and post them here or do a screen shot of them so I can have a lookie see?

 

Well after reading the Logworks instructions I guess I can't get the A/F readout on the laptop screen because I don't have the LM-1, I just have the stand alone gauge setup (LC-1 and XD-1).

 

I have the LC1 and I read the AFR on my screen. I think speedy has a screen shot of him doing the same up a few posts.

 

Yeah I saw that, you guys don't have the LM-1 either? Maybe its because I've got the older Logworks software. I see Speedy has Logworks 2.

 

maybe, if you need a copy I can try and send it.

 

Thanks, I'd appreciate that very much. I'll send you a PM.

EDIT: For anyone else in the same boat, I found where it can be downloaded from Innovate:
http://www.innovatemotorsports.com/support.php

 

But really, you shouldn't get in those cells in open loop as that's in higher RPM and PSI positions so I'm confused on that???

Tuning by ear may not be optimal, but it's worked well for me. I can hear and feel ping pretty easily.

I resent my maps in e-mail. I renamed them as *.txt to get through your e-mail scanner. Just rename it back to *.mdb to load.

If you have the little black pig tail with the serial connection it should work. Just make sure you have the terminator installed.

 

Thanks Speedy, I do have the terminator plug installed in the "in" port of the LC-1 (per step #1 of the standalone install instructions). I'll try it again now that I have the new Logworks 2 software installed. Do you have to start a new log to start the display on the laptop, or hit a start recording button or something like that?

 

You plug in the lap top to the serial port, start logworks 2, then select the appropriate com port and "connect". That's it. The connect button is the first thing you should see when starting logworks2.

 

Great, thanks Speedy.

 

It worked! At first I was getting a no live data message but I found my stereo plug wasn't pushed in far enough, it really takes a firm push to seat it completely.

 

Awesome man! Now get out there and do a run to see what that psi really is. I see you're an auto, so do the run with OD OFF and ECT ON and do two runs. Do the first one starting at 60MPH and floor it. It'll down shift to second then upshift back to third. Then just hold it till red line or speed limiter.

Then do a second run starting from 70mph with the same OD OFF ECT ON. This will keep it in third gear with no down shift. You'll probably show a tad richer doing this, but you still wanna be in the 11.3 - 11.5 range in the low end.

Doing this two different ways covers both scenarios as different cells will be used in each case and you can blend in around them to make it smooth. Pretty easy once you video it.

 

I have a 98 Tacoma 3.4 liter with a TRD SS installed. Since I've owned the truck, it has pinged when accelerating unless I really go easy on the accelerator until the rpm's get up to around 2500 or 3000. It does it when the car is cold or hot. I took it to my mechanic and he put his scope on it and the truck wouldn't go from open to closed loop. It did (in open loop) show that the fuel pumping in was 14% more than normal.

I have the feeling this is related to the SS but not sure. I read your post and most of it is over my head.

Any ideas?

Thanks, Mike

 

Do a search for "TRD Supercharger Ping" or even just "3.4 supercharger" here and all of your questions will be answered. It's safe to say that-

- Yes, the ping is due to the supercharger.

- It's probably not because it's running too rich, but rather too lean, and the timing is advancing too far since it was originally a naturally aspirated engine.

- The best way to fix it is to get some aftermarket components to increase fuel delivery and retard timing. www.urdusa.com is your best bet, specifically the URD 7th Injector Kit (like Speedy has) or the URD 3.4l Supercharger Fuel Upgrade Kit (like I have).

Also, you should read this article:

Wiki Article on the TRD Supercharger

 

http://s114.photobucket.com/albums/n...current=hh.flv

Latest run. 5th gear up a big hill on the freeway. All 7th injector cells are 0 and I'm still running just about perfect. I have a giant fuel injector shaped paperweight

I've done 3rd gear WOT, 4th gear WOT, redlined it, no matter how hard I try to lean out my mix, the stock fuel pump and injectors still put me as low as 10 on AFR.

I'm thinking of going to a smaller pully (2.1) since I'm only getting 7.5 PSI at WOT and my fuel mix is good with the stock fuel setup and 2.2 pully...

 

Can you do another one of those movies running the RPM all the way to redline?

Gadget

 

At 6.5 and 7 psi it looks a tad lean to me (12.5 or so). Not sure if you're in open loop yet or not at that point. We definitely need to see this run up to red line.

 

Also, it's important to take a look at injector duty cycle. If the injectors are running at 100% (basically open the whole intake stroke) to get you to 12.5, you've got a problem waiting to occur. As a general rule, I think you want to keep your injectors running no higher than 90%, preferrably at about 80% or lower.

 

Very good point.

 

in closed loop the AFR calibrator keeps me at 13.5ish so if you see 12s, I'm in open loop at that point.

I will do a redline run tonight and post tomorrow. I don't care if the truck leans out at redline since I don't drive above 5K RPM. I only really use boost on the freeway going uphills and don't drive above 4K RPMs for more than a few seconds ever. I am driving under boost for minutes on end in situations like I showed in the last video though (3-4K RPMS under heavy load and high boost).


In open loop how can you control injector duty cycle? What does the ECU do in open loop? Just put out as much gas as possible?

Also, I can't see the fuel pump or injectors failing on me, the supercharger has been on there for 90K miles without any fuel mods but stock pully from the PO.