November 20, 2019, 11:24:36 AM

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Messages - digitalsolo

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Episode 4 is up (and misspelled, apparently):

Now you can listen to me blather on for 7-8 more minutes!

Electronics / Re: Going standalone - T56 transmission wiring?
« on: October 15, 2019, 10:42:42 AM »
My standalone controls my reverse lockout and uses VSS.    It does not interface to reverse lights, but you can make them work on the chassis with a relay pretty easily.   FWIW, I've seen reverse lockout functionality in:

Holley (Terminator/HP/Dominator)
AEM Infinity

As far as connections, I ran a 6 pin Deutsch DT connector on the engine harness that ties to a sub-harness on the transmission, and used 18 gauge TXL wire to build it.

Build Threads / Re: Joel's garage build / organization
« on: October 14, 2019, 07:41:48 AM »
Congratulations sir!    That should be a great shop!

Intake manifold fabricobblation:

This was a real PITA, and the most complex thing I've ever fabricated I think.   I cut the runners off flush, about 1.5" shorter than stock.   I then marked the runners on a 3/16 flat plate (3003) and cut them with a step bit to "big but not all the big" then welded the runners to the plate (this was a real PITA, between snaking the torch around them and welding old dirty cast to the 3003.   Anyway, once that was done, I used a wood router with a 1/4" roundover bit to enlarge the holes to proper size and bellmouth them.   I cleaned that up with a die grinder a bit here and there.

On the plenum, I bent up some more 3/16" plate to try and get as much volume as I could from the area, while dodging strut tower and brake booster.    I ended up with the shape you see there.   I had to do it in two pieces to fit in my press brake, so I welded the joint from the inside and outside (which were both chamfered for better penetration).   The layout was also done to try and maximize strength in the intake (same reason I did it with 3/16")

I then cut everything to fit and seam welded all of it.   The corners were all set to have a very small overlap of about 1/16" so that a good bit of the edges were exposed to be sure that the welds got good, consistent penetration.

All that's left will be to pick up an LS throttle body flange (using a GM 90mm "gold blade" on the car) and fabricate an adapter plate for that.   I will also add a doubler plate on the bottom in an area to add strength for tapping NPT ports for vacuum, etc.   I may also add a couple standoffs to the bottom to mount up a vacuum manifold block so that's it nicely integrated into the package.

It's not perfect but for a first attempt at something like this, I'm pretty pleased with it, and most importantly it fits and (probably) won't explode when we boost it.

General Tech / Re: LS1 wont start after swap
« on: October 10, 2019, 12:31:01 PM »
Alrighty, good stuff.   FWIW I checked this morning and I have 4.   I don't know why I have 4.  LOL

Build Threads / Re: Blake's 1965 Mustang Project
« on: October 10, 2019, 12:27:28 PM »
96.4 Firmware Update:

1.  My flex fuel output on my AEMnet gauge works perfectly now.   I see ethanol% properly in my logger now also.    So that was fixed.
2.  I could not import my old tune from 96.1 into 96.4.   That's f&*Xing annoying.   Spent 2 hours copying every table to excel and back out.   Grr.
3.  My VE table is now off.   So, to me that means they altered some math behavior between 96.1 and 96.4.    FWIW, when I had 96.2 and moved to 96.1 (because of ECU replacement) my tune was fat, so I'm guessing it actually changed in 96.2.   Anyway, I'm reworking that.
4.  They added some new tables/safety features/etc (which is probably why I can't import a tune from the old version, but that's not like they can't account for that...).   Nice to see improvements though

Regarding VE changes:  I'm waiting to see 100%, but I've long had an issue with the tune that I couldn't explain where my VE was higher at idle/VERY low load then dropped down several percent for 500-750 RPM, then went back to a "normal" VE table.    It worked perfect, but looked weird, as that's not a behavior I expect to see as the engine shouldn't be less efficient in that zone vs idle.    The new software seems to have removed that "dip" or at least lessened it.   I'll know more once I dial the tune back in properly.

Downsides:  I'm still annoyed that I have an ECU that can do custom CANbus stuff but I can't access the CANbus stuff.   I don't understand why they can't make a menu editor where I can go "on CAN channel 2, send message in format xxxxxx based on this sensor data -> this math equation" or "on CAN channel 2, if you see this data, do this" so that I can have a CAN panel that I press a button on and the ECU sees it as an input.   That's not that hard to do, I did it in a freaking Arduino and I'm not a software developer.   Motec can do this, I think MS3 can do this.    Just annoys me to have what would be a useful feature for me that I can't use.   I'd like them to make this happen and maybe have a cruise control input I can tie in with it, so that I could use a BMW or other cruise switch with CAN output and use that to control cruise on the car and other stuff like that (maybe HVAC button controls to that the ECU is aware, yada yada).

I should start an ECU company.   Or maybe just buy an MS3 and fork the codebase to make it do what I want.   Anyway, I'm getting closer to happy with my AEM, just annoys me it has taken 6 months to get to this point.

Build Threads / Re: Fd lsx tt slow build
« on: October 09, 2019, 03:13:59 PM »
Curious how you like the accelerometer.   I'm looking at one for my car.

Build Threads / Re: Blake's 1965 Mustang Project
« on: October 08, 2019, 03:36:33 PM »
w00t!   AEM got me 96.2 and 96.4 firmware releases for a Coyote and my ECU.   I'll try those and see if they help the last few issues I've been having.  Here's hoping for a smooth process from here on out!

Fabrication / Re: Mid muffler options
« on: October 08, 2019, 12:24:55 PM »
I used to run a bullet muffler and then a "normal" muffler in line on my FC on a 3" single, it was pretty quiet.

General Tech / Re: LS1 wont start after swap
« on: October 08, 2019, 10:20:42 AM »
Poop, I totally forgot to check for injectors.   sorry, been crazy.   I'll check tonight.

Build Threads / Re: Supe's NASCARX-7 (SB2.2 swap)
« on: October 08, 2019, 10:19:48 AM »
That looks great!    A giant PITA, but man it ought to be great when you get it all sorted!

Fabrication / Re: Mid muffler options
« on: October 08, 2019, 08:03:57 AM »
Engine Masters tested the Magnaflow style straight through mufflers and they cost basically 0 HP and made a big decibel reading difference.    If's just a corrugated tube in an oval housing full of baffle.   If you can fit them somewhere, it'll work well without any power cost.

Build Threads / Re: Blake's 1965 Mustang Project
« on: October 08, 2019, 08:00:43 AM »
ECU has up to 4 channel traction control available.   I need to build a sensor setup of some type for the front wheels and I'll use the transmission VSS for rear wheels (so a 3 channel) since with the TrueTrac if I'm under load and something is slipping, it's very unlikely the rear wheels aren't both spinning anyway.

It's "on the list", hah, but on the fairly short part of it.

Once I sort out boost control fully, I plan to setup a higher boost target map for E85 with my map selector switch and probably push it up 14-15 psi, and that's probably all I'll push on the stock bottom end, and not on a regular basis.    Any more than that and the pistons/rods will probably end up shapes they weren't intended to be.

Build Threads / Re: Blake's 1965 Mustang Project
« on: October 07, 2019, 11:53:29 AM »
Annnnd, status update:

1.  My flex fuel reads fine for the ECU, but doesn't output correctly to the gauge.  It appears to be a units issue and is probably a firmware problem.   The ECU reads frequency correctly.  Flex fuel sensor reads 50 - 150hz, with 50 being 0.0% and 150 being 100.0%, I read 61hz, which is 11% ethanol which should be about right.    The ECU does the math with this correctly, but it shows .11%, instead of 11%.   The tables use this properly, but that means it outputs .11% to the AEMnet gauge instead of 11% and the gauge reads 0%.    If I can ever get them to send me proper firmware for my ECU (been trying for 5 months now...) I can see if that is fixed.

2.  I was 100% right about the BOV.    Hooked up correctly the car makes 10.4 PSI, which is about what the gate springs are, so that lines up.    My boost duty cycle in the solenoid doesn't seem to control to effect boost output, but then again I haven't disabled it to see if I'm actually making less on the springs only (just realized that as I'm typing this...).

I did a quick pull the other night to see how it was doing and hit what felt like a hard boost cut in the ECU at 5800 RPM.   I can't see any data that shows it, and the ECU shows injector commanded pulsewidth was normal, but it definitely shut the injectors off (lambda went from .70 to 1.90 in 0.10 seconds).    I wasn't actually AT the boost limit for the ECU though, so that's... weird.   I cranked the boost limit up by 25kpa and I've done a (shorter) hit and it spun 6800 RPM no problem at 10.4 psi (same exact thing I had when it boost cut) and it didn't cut, so hopefully that's all it was.

The numbers look good though, 0 knock the whole way up, 10.4 PSI from 4800 RPM to redline, 15-16* of timing, and about 60% duty cycle on the injectors.

Beyond that issue, the car pulls HARD now.   I took my wife for a ride in it (first time she's ridden in it) and rolling into it slowly in 2nd gear it spun both tires hard for about 50' at <75% throttle.   Makes boost at 3500 RPM and climbs QUICK from there and pulls hard all the way to redline now.    I'm pretty sure that the issues with the BOV were causing all kinds of trouble, mostly overspeeding my turbos and deadheading exhaust in the turbine housings since the gates never opened before.   At least I didn't have but a few short pulls on it so I don't think it hurt anything.

Build Threads / Re: Blake's 1965 Mustang Project
« on: October 03, 2019, 07:07:00 PM »
...I hooked vacuum up to my BOV wrong.   I accidentally made it a very effective 4 psi boost bypass valve.   That explains why I couldn't get any appreciable boost out of the thing.    Oy.   Fixed it, have to test tomorrow.   First though, time to turn down the wastegate duty cycle...

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