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Old 05-13-2008, 07:39 PM   #1
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Default Ah HA! Found my lost boost!

History: When I first wired my solenoid I put the diode on the wires about 2" off the valve. Then I proceeded to wrap it in electrical tape as if I was trying to suffocate it. I was also smart used two black wires off the valve so I later, if I ever need to, I could not determine which is which.

Flash Forward: In my haste to get my car running I seem to have connected my solenoid backwards so the wrong end of the diode saw the 12v source. Over the past few day of finally driving the new car I've had a supercharger like boost as I'm only at wastegate. EBC was not operable. So pulled the wiring apart to see that the diode on the wiring was fried. Fixed. Still nothing. So I open the MS and find part of the circuit fried. Fixed. Now I say I found my lost boost. Much Improved. (I'll post pics of the board later, need to download off camera). Still missing about 500RPM of spool, but better than before....traction is a thing of the past again.
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Old 05-13-2008, 07:41 PM   #2
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btdubz, my MAT still doesn't budge. But it always reads accurate, how neat-o.
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Old 05-13-2008, 08:10 PM   #3
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methinks 13.0 is a bit lean there, buddy-o
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Old 05-13-2008, 08:38 PM   #4
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yeah i know, cells we untuned. 11.0:1 is rich too, i dont wait for no 160*F.


aiight here's the trace that blow out...glad i saw it, i was scratching my head on this one for a few minutes because i had no connectivity between the AIC hole and the DB37.

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Old 05-13-2008, 09:23 PM   #5
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why would you untune a cell
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Old 05-13-2008, 10:41 PM   #6
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because i never hit those cells before, that was my first log since getting the EBC working. like I got it working, pulled out of my parking spot, logged it, and parked the car and posted.

notice the other log overlayed? When warmup is not on, that **** was perfectly flat at 12:1 - 11.8:1
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Old 05-13-2008, 11:32 PM   #7
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I only see RPM/MAP/Boost(psi) in the first box, but I see 4 lines.
I'm also wondering why MAP and Boost are different lines... don't both of those read off the internal MAP sensor?
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Old 05-13-2008, 11:45 PM   #8
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lines are the same, just so you can see both readings, makes it easier to see 12psi not 180kPa.
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Old 05-13-2008, 11:46 PM   #9
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Quote:
Originally Posted by samnavy View Post
I only see RPM/MAP/Boost(psi) in the first box, but I see 4 lines.
I'm also wondering why MAP and Boost are different lines... don't both of those read off the internal MAP sensor?
map's not there but the four lines are "before" and "after" overlayed.
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Old 05-13-2008, 11:54 PM   #10
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@12psi your MAT is 98 degrees?!
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Old 05-14-2008, 01:54 AM   #11
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Yeah what's with that MAT??
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Old 05-14-2008, 01:56 AM   #12
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Originally Posted by elesjuan View Post
@12psi your MAT is 98 degrees?!
Yeah, seems a bit high to me as well... Probably it was a warm day in Atlanta.

Is there a reason the boost seems to rise much more slowly until about 3k in the "after" trace? Without seeing TPS it's hard to know what was going on.
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Old 05-14-2008, 07:36 AM   #13
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Looks like his MAT at 12 psi is 86* and at 8 psi its 75*. You guys are reading the max MAT temp he saw over the entire datalog. That is probably when he was at idle and the sensor heat soaked.
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Old 05-14-2008, 10:09 AM   #14
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Originally Posted by cjernigan View Post
Looks like his MAT at 12 psi is 86* and at 8 psi its 75*. You guys are reading the max MAT temp he saw over the entire datalog. That is probably when he was at idle and the sensor heat soaked.
s

My AIT sensor reads dead on based off an external thermometer, if the sensor is reading high inside the pipes at idle and I remove it from the bung and blow on it so it can read ambient temps, it's dead on within seconds.



Ok, I believe my issue with my lost spool was because I always forget that my pedal should go to to floor. Did some ninja tuning on the way to work:
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Old 05-14-2008, 10:17 AM   #15
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Glad to hear this Scott, I bet it's a good feeling to have boost, even if it's again, I should be so lucky to feel so for myself soon.
Scott builds two turbo Miatas, me not even one yet. :(
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Old 05-14-2008, 11:10 AM   #16
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it helps to show the TPS in the datalog.

and since when is scott in atlanta?
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Old 05-14-2008, 11:40 AM   #17
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and since when is scott in atlanta?
D'oh!

Hey- Atlanta, Arlington, Chicago, Phoenix, they're all in that weird part of the country east of I-15 where you can't get good fish tacos.

And the comment about the MAT being "a bit high" was a joke. After a long boosted pull I routinely see 90-100F even on cold days. Here's one from yesterday morning. If I recall correctly, this was up a slight hill:

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Old 05-14-2008, 11:44 AM   #18
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Excuse you, good sir, as I believe you may have misspoken. It is my firm belief that Athens, GA (just outside of Atlanta) indeed has some of the best fish tacos in the country, if not the world.

But perhaps we speak about different things?
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Old 05-14-2008, 11:52 AM   #19
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it helps to show the TPS in the datalog.

helps if i had a TPS installed. on the list.
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Old 05-14-2008, 12:01 PM   #20
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Quote:
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helps if i had a TPS installed. on the list.
is there a proper spelling of the word "d'ohwned"?
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