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Old 02-25-2006, 05:31 PM   #1
tmarcel
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Default Tuning has begun finally!

Well, some of you guys may have followed my engine build up recently. I finally got around today to actually tuning it from scrathc pretty much using a UTEC. It's got about 3500 miles on it now and I just switched to synth oil last night (5w-40 Rotella T).

The biggest thing right now that is troubling me is that the knock sensor just isn't close to being calibrated for THIS engine. First off, it's a WRX 2.0 UTEC so of course that's different from the 2.5 UTEC settings. Second, this engine is just so much different than the quiet stock 2.5 engine. My UTEC sensitivity numbers start at 85, then, 65, 55, 50, and back to 60 through redline. Of course, you're just leaving power on the table without being able to know if it's knock or the UTEC THINKS it is knock. I am confident enough with these settings for now but I need to get a way to calibrate the sensor really soon.

Second, some of you also might know that I went to a blow through MAF recently. I knew that readings would be a little higher but damn. At 20psi (this is as low as I can get the boost using the UTEC) the MAFv reads 5.0v at 5100 rpms (4.9v just before 5k). It's kind of a pain not being able to get the boost any lower just for tuning but the MAF is going to present a problem once I start turning up the boost I think.

Otherwise, I got it nice and smooth in the 0-5.5k rpm range. I still need to spend some time working on the 5.5k rpm - redline range maybe tomorrow. Once the AFR is all dialed in then I can start and see if I can get just a little more timing out of it. The bad thing is, is that timing is artificially low I think. In the 4750-5750 range I had to just pull timing in the 60-100% down way low. About 18-11 deg BTDC in those columns. That seems really low but who knows. I can't hear the knock/pinging and my buddy couldn't either.

Mechanically (knock on wood hehehe), she's sounds good under power. I'll have to give an update later on. The WRX cams in the ported heads (and all of the other port work)seems to be doing a good job.
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Last edited by tmarcel; 02-25-2006 at 05:39 PM.
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Old 02-25-2006, 06:02 PM   #2
Crazykev
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What WB O2 are you running? I just started retuning my car today after installing my Tuner Pro.
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Old 02-25-2006, 06:25 PM   #3
rotanner
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Quote:
Originally Posted by Crazykev
What WB O2 are you running? I just started retuning my car today after installing my Tuner Pro.
Please tell us what you have.
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Old 02-25-2006, 06:26 PM   #4
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I meant my post above to the originator of the thread. Sorry.
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Old 02-25-2006, 06:51 PM   #5
tmarcel
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Oh yeah... it's the LM-1 by Innovate.

By the way, for the blow through MAF the other day I had stretched my numbers out for scaling (420-800) but realzied later on that although it idled okay it was just too jerky and not smooth. At idle and cruise it would maintain stoich, but as I transitioned the throttle at cruise it would go to like 17:1 and back to stoich.

Needless to say that didn't work. As the tuning began today, the first thing I did was drop the scale number down to 650 and stuck with the stock 420 default size. Reset the ECU and that was what it needed. However, with these numbers, I've got large negative numbers in the fuel map going to -12.5 in the upper 90-100% columns. The injectors are modded and cleaned ones and are rated at 815-820cc's.
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Old 02-25-2006, 07:21 PM   #6
gpatmac
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Todd,

Could you post some logs? Or email? gpatmac@hotmail.com.

Thanks,
Pat
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Old 02-25-2006, 08:42 PM   #7
tmarcel
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Quote:
Originally Posted by gpatmac
Todd,

Could you post some logs? Or email? gpatmac@hotmail.com.

Thanks,
Pat

Pat,

Yes BUT I don't have a laptop right now and am borrowing my friends. Hopefully he'll be down for doing some tuning tomorrow (I made him learn how to input data in UTEC today - he didn't want to drive for fear of getting a ticket ). Anyway, if we are out tomorrow, I'll be able to grab some logs no problem! I think you will be under-impressed with the lack of timing though (I know I am)

Todd
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Old 02-26-2006, 12:17 AM   #8
Javier
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+1 for some logs. Keep us posted on the progress!
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Old 10-19-2006, 10:54 PM   #9
WRXRallyBlue
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How did everything turn out? Do you have a more recent thread?
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Old 10-19-2006, 11:05 PM   #10
tmarcel
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Well, I had a failure due to a bent con rod recently. This happened because of: 1.) a fuel injector(s) hanging open or 2.) Bonked UTEC ECU. TXS has been really cool so no problems with them FYI. They did replace my UTEC even though it was not under warranty. The car would no longer start or run with the bad one.

I should have another motor back in the car in the next 2-3 weeks.
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Old 10-19-2006, 11:38 PM   #11
WRXRallyBlue
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Sorry to hear that. I definitely want to hear how things turn out.

BTW, what motor were you running before and what are you putting in?
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Old 10-20-2006, 11:04 AM   #12
tmarcel
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Quote:
Originally Posted by WRXRallyBlue View Post
Sorry to hear that. I definitely want to hear how things turn out.

BTW, what motor were you running before and what are you putting in?
Sure I'll do that.

The old engine started out life as as a STi block, crank and rods. The new one is a Phase 1 block and crank and will be using either Pauter or Crower rods. I'm looking into using Hard Blok filler to stiffen up the block but I'm still on the fence on whether I'm going to use it or not. Heads and intake manifold are WRX ported and TGV-less and no rods.
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Old 10-20-2006, 02:19 PM   #13
WRXRallyBlue
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Quote:
Originally Posted by tmarcel View Post
Sure I'll do that.

The old engine started out life as as a STi block, crank and rods. The new one is a Phase 1 block and crank and will be using either Pauter or Crower rods. I'm looking into using Hard Blok filler to stiffen up the block but I'm still on the fence on whether I'm going to use it or not. Heads and intake manifold are WRX ported and TGV-less and no rods.

Cool. What do you mean "no rods?"

Also, are forged pistons included?
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Old 10-20-2006, 03:24 PM   #14
tmarcel
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Quote:
Originally Posted by WRXRallyBlue View Post
Cool. What do you mean "no rods?"

Also, are forged pistons included?
If you look at the TGV housings they've got an actuator and a sensors which are joined by a rod with the butterflies. Most people wjust delete the plates off the rods so the ECU still thinks that it's doing something. On mine I've told the ECU to ignore the TGVs all together even though the rods are not in place.

On the pistons, yep got a set of Wiescos with a thick coating applied to the skirts.
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Old 10-21-2006, 04:20 AM   #15
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Thank you very much for answering. I wish you the best.
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Old 10-25-2006, 11:28 PM   #16
bcblues
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So did the failed UTEC cause the con-rod trouble?
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Old 10-25-2006, 11:50 PM   #17
tmarcel
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Originally Posted by bcblues View Post
So did the failed UTEC cause the con-rod trouble?
I don't know.No one will ever know at this point. The probablility is a good chance it was; but WAS out of warranty and Turbo XS took care of me so no blames. I guess this is a time where you pay to play
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Old 10-26-2006, 01:15 PM   #18
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Yeah, I am quite familiar with the "pay to play" philosophy. I was just thinking that there are not all that many ways for a UTEC failure to _cause_ a broken con rod. Maybe a redline gone wild or something?
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Old 10-26-2006, 03:38 PM   #19
tmarcel
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Quote:
Originally Posted by bcblues View Post
Yeah, I am quite familiar with the "pay to play" philosophy. I was just thinking that there are not all that many ways for a UTEC failure to _cause_ a broken con rod. Maybe a redline gone wild or something?
Nope, maybe more like the injector(s) hanging open due to ECU/UTEC control. It's entirely possible. Redline was never excessive. All that I know is the UTEC begin to act strangely about a week before the mess (contradictory logging from UTEC to ECU, then the bent rod(s), then smoke, then just wouldn't even start fire but the motor would turn over). Left stranded on the side of the road for more than an hour, I decided to pop out all of the UTEC harness connectors and try the ECU by itself. Started immediately. I later tried the UTEC once again and it wouldn't start. Nothing in the maps nor the params ever changed.
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Old 10-26-2006, 11:39 PM   #20
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So hanging open injectors can flow enough to hydro-lock an engine?

Bad luck man, I feel for you.
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