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03-24-2009, 02:52 AM | #37 |
That's our goal!
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03-24-2009, 08:54 AM | #38 |
Drives: 2006 Mazda3 Sedan Join Date: Jun 2007
Location: Germantown, MD
Posts: 116
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What is it you're trying to monitor with the Scangauge?
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03-24-2009, 09:25 AM | #39 |
Drives: '08 Bayou Blue LB AT Join Date: Oct 2008
Location: West Hills, CA
Posts: 2,517
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Most likely ignition timing at different RPM during WOT. We might be able to compare this to his air/fuel ratio from the dyno run.
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03-24-2009, 11:46 AM | #40 |
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Location: Ottawa, ON, Canada
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I was pretty sure that lean = more power..? But more dangerous.
I still have yet to buy gauges, so I can't be any help to you guys right now. Although (interestingly, whoopeee) I remember taking some rubber line off something and there being a fair bit of oil/muck inside it. Don't know which line. But perhaps I should get an oil catch-can too.
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2006 Red Blitzed RS 5-door |
03-24-2009, 12:05 PM | #41 |
The guy who did my dyno was saying all cars are different. Some guys make their cars run lean because their car responds with more HP when it is lean. Other guys lose HP when it is ran lean. I guess the Yaris is the case of a car losing HP when running lean at higher RPMs.
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03-24-2009, 12:12 PM | #42 |
Drives: '08 Bayou Blue LB AT Join Date: Oct 2008
Location: West Hills, CA
Posts: 2,517
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I've contacted my dyno guy to see how much he charges to tune this little beast. Afterall, it's now my little project car.
As a side note, I set the S/C to OFF this morning when I got on the freeway. I did not see any ignition retard down to single digits. I am only guessing but this tells me that the ECU is sensing pre-igition during boost and is retarding the timing, which is what my pictures showed in the other thread. That can't be good for engine life or max power output. When there's no boost and no pre-ignition, the ECU leaves the inigition timing in the low to mid 20's.
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03-24-2009, 01:30 PM | #43 | |
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Quote:
More fuel = more allowable ignition advance. You ideally want no knock correction as it takes the ECU a bit for every degree of correction where you lose a severe amount of power. It should really be checked on the cars with misfired on how bad it is!!! |
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03-24-2009, 01:42 PM | #44 |
Learn to Relax
Drives: 2007, Meteorite, LB Join Date: Dec 2008
Location: Anaheim, CA
Posts: 2,070
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Hi Long. Have you considered maybe one of your fuel injectors might be clogged? I try running a high quality injector cleaner in your gas and see if the condition improves. You are trying to eliminate all variables?
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03-24-2009, 03:22 PM | #45 |
I used to have 1700 posts
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could the power enterprises camcom correct a/f ratios by manually advancing or retarding the timing?
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03-24-2009, 03:32 PM | #46 | |
Who said Yaris was slow?
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Quote:
However, by sustracting enough timing you can make the car run safe even with those lean AFR's you guys are seeing. Theoretically you could tune the car with the Camcom... however, I haven't seen any camcom sucsesfully installed in a Yaris.... yet. Some times you can find those for cheap on ebay... it worths a shot. |
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03-24-2009, 03:52 PM | #47 |
Drives: '08 Bayou Blue LB AT Join Date: Oct 2008
Location: West Hills, CA
Posts: 2,517
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I can't wait to see what a properly tuned Blitz'd Yaris can put out. I know we've been admonished not to put larger injectors on this car but hear me out on this theory.
What if the current fuel system with the Blitz piggyback fuel controller cannot pump enough fuel into the cylinders during WOT, leading to a lean condition. The ECU detects pre-ignition and has to retard timing to protect the engine, and as a consequence robs us of the maximum power the S/C can put out. If I put slightly, not hugely, larger injectors in the car, it may run less lean during WOT and the ignition retard is less, giving more power. During idle or light throttle, the ECU detects a rich condition from the O2 sensor and is able to dial back the fuel to maintain proper AFR. Remember, I said slightly larger injectors, not fire hoses. If the increase in fuel is within the ECU's cabability to control, that could just work. Anyhow, that's the theory I want to present to my dyno guy if I have him tune the car.
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03-24-2009, 04:04 PM | #48 |
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^^^ Quite excited about the sound of that!
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2006 Red Blitzed RS 5-door |
03-24-2009, 04:09 PM | #49 |
Who said Yaris was slow?
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Garm's car has been running with TC injectors on the OEM ECU right?
And iirc he didn't had any idle or part throttle problems... just a lean condition at WOT... but that was @ 180 whp I say your theory is worth a shot if you can find some injectors for cheap. Look for injectors from a Celica GTs, corolla/ matrix XRS. I think those are a little smaller than the TC's. You can look into the 6 gen celica forums for those.. |
03-24-2009, 04:45 PM | #50 |
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well holy crap if that the case, are you maxxing out the stock ones? any way to tell? I mean anything over what? 85% efficiency is bad you want it from atleast 65% to be running somewhat safe?
But see this is the problem, you have no way to scaled the injectors constant and must calculate this pretty good based on the amount of fuel it will be dumping in there....Larger injector + same constant = stays open for a longer time = more fuel = richer afr.... good luck On a GT28 1.8T A4 I was tuning it started out with 210 or 280cc depending on the fpr with an afr of 11-12 while driving, swapped in the 550cc knocked us down to around 8.5-9.0 before i properly calculated the scalar to bring it back up. just to give you a headsup. |
03-24-2009, 06:07 PM | #51 |
Drives: '08 Bayou Blue LB AT Join Date: Oct 2008
Location: West Hills, CA
Posts: 2,517
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That's why I'm leaving this to a professional tuner. I'd end up with stacks of different size injectors and totally frustrated.
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03-24-2009, 06:17 PM | #52 |
Drives: 2005 Toyota Echo Join Date: Oct 2008
Location: Ottawa, Ontario
Posts: 177
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Megasquirt is a viable option! it can be done... and it has been done....
I am running it in my car. Its not overly complicated either if you have a little bit of electronics background. I have helped to install and tune with megasquirt before. Any shop should be able to make you a wiring harness.
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03-24-2009, 06:32 PM | #53 | |
Bathroom + Laptop = <3
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Quote:
did you install it on a yaris or an echo? |
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03-24-2009, 07:31 PM | #54 |
Drives: '08 Bayou Blue LB AT Join Date: Oct 2008
Location: West Hills, CA
Posts: 2,517
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Ok, I just spent a half hour on the phone with dyno guy. He does not recommend that I start with larger injectors or more powerful fuel pump. He recommends a boost-sensitive adjustable fuel pressure regulator.
He also states that his expertise is with muscle cars and not ligament cars. (my words ) Hey, we have enough Blitz'd owners on this forum now that each of us should try one tuning method and report back. And then we slowly go from there! I hear crickets chirping.
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