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David's GT500 Troubleshooting Thread

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Re: David's GT500 Troubleshooting Thread

Post by Leonard 95 on 4/13/2011, 9:06 pm

updates?
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Re: David's GT500 Troubleshooting Thread

Post by ShelbyJosh'09 on 4/13/2011, 9:41 pm

Dyno Results??
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Re: David's GT500 Troubleshooting Thread

Post by 07Shelby500 on 4/13/2011, 9:54 pm

Still working on it. What it boils down to thus far is this: the tune is yanking timing down to about 9* and less due to the air inlet temp I believe showing over 130*. Three things I think could be to blame. 1. The tune file is corrupt. 2. The SCT Xcal I have is malfunctioning somehow or 3. The mass air meter which contains the temp sensor is fried. Won't know for sure until tomorrow. Baseline pulls on the dyno resulted in roughly 440hp and like 450tq if I remember right. So because of the issue I'm losing anywhere from 80-100rwhp which certainly explains my low trap speeds.

So it's currently sitting on the dyno awaiting more testing and a tune tomorrow. Until the new tune goes in we won't know which item is to blame with my current tune.

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Re: David's GT500 Troubleshooting Thread

Post by loweredf1 on 4/13/2011, 10:31 pm

cool getting it narrowed down. ready to hear a end result
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Re: David's GT500 Troubleshooting Thread

Post by ShelbyJosh'09 on 4/13/2011, 10:38 pm

I bet it has something to do with the tune/file or MAF sensor. Highly doubt the SCT flash tool is malfunctioning, but I guess anything is possible.
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Re: David's GT500 Troubleshooting Thread

Post by ShelbyJosh'09 on 4/13/2011, 10:57 pm

Did you install the cold air kit yourself? If so did you make sure the sensor was clean after taking it out of the stock air unit? Sometimes they get oil on them and that will cause it to not function.
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Re: David's GT500 Troubleshooting Thread

Post by BMMC1 on 4/13/2011, 11:03 pm

Did you clean you MAF? Just kidding! Keep us posted.

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Re: David's GT500 Troubleshooting Thread

Post by 07Shelby500 on 4/13/2011, 11:14 pm

ShelbyJosh'09 wrote:Did you install the cold air kit yourself? If so did you make sure the sensor was clean after taking it out of the stock air unit? Sometimes they get oil on them and that will cause it to not function.

Yes and yes. Looked at it again today. Visibly looks fine cleaned it again with maf cleaner just in case.

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Re: David's GT500 Troubleshooting Thread

Post by ShelbyJosh'09 on 4/13/2011, 11:37 pm

2006GT wrote:Did you clean you MAF? Just kidding! Keep us posted.

You just wanted to say MAF!
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Re: David's GT500 Troubleshooting Thread

Post by BMMC1 on 4/13/2011, 11:50 pm

True... :)

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Re: David's GT500 Troubleshooting Thread

Post by Shelby10' on 4/14/2011, 12:25 am

Weaksauce :)


You'll get it figured out!! Good luck tomorrow! I should stop by after work.

What time is this storm supposed to hit? Dont want the car out in it.

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Re: David's GT500 Troubleshooting Thread

Post by Supersnake on 4/14/2011, 8:18 am

Hang in there Mr. David pretty soon you'll be showing Jarrod your tail lights
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Re: David's GT500 Troubleshooting Thread

Post by BMMC1 on 4/14/2011, 10:49 am

Shelby10' wrote:Weaksauce :)


You'll get it figured out!! Good luck tomorrow! I should stop by after work.

What time is this storm supposed to hit? Dont want the car out in it.

Word...
http://www.srh.noaa.gov/tsa/dsp/dsp.php

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Re: David's GT500 Troubleshooting Thread

Post by 07Shelby500 on 4/14/2011, 8:11 pm

Update: Ok, here is what was revealed on the dyno. Long story short it was the tune from VMP that was the culprit. What we think is that somehow in the spark table commands it was taking 10* rather than 1* away when it wanted to pull timing out. If you looked at my spark settings under load it was pulling 10* instead of 1 and 19* instead of 9 and so on etc. I am speculating that it was somehow a typo when the tune was set up. In other words the zero was hit making a 1 into a 10. This of course is only speculation without being able to see the file on Justins end.

With the corrupt VMP tune in the car dynod at 444HP and 446TQ
After the new tune the car dynod at 525HP and 524TQ. The car now runs as it should.

Not sure how it happened. Don't really care. People are human and mistakes are part of it. What I'm upset about is being completely blown off. That's all I'm going to say on the subject on an open forum. It is what it is. So after a substantial amount of money and time the problem is finally solved.

Oh and the boost was up to 12lbs, which still seems off by a pound or so but the weather here today was 82-85* with about 50% humidity so that could have something to do with it.

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Re: David's GT500 Troubleshooting Thread

Post by Leonard 95 on 4/14/2011, 8:15 pm

Good numbers, I put up around 528 range, at least its fixed! I only pushed around 12-13lbs boost with my 2.6 pulley so you should be close to that.
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Re: David's GT500 Troubleshooting Thread

Post by 07Shelby500 on 4/14/2011, 8:21 pm

Yeah I figure the power numbers were in the correct range for a dynapack dyno. Would be higher numbers I'm sure at vangs but I could care less about dyno racing. I'll say like I always do: "Dyno numbers are cool and all, but it's like asking someone how much they can bench. What difference does it make if they can still kick your ass?". Lol

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Re: David's GT500 Troubleshooting Thread

Post by Shelby10' on 4/14/2011, 8:37 pm

Im glad you figured it out David! Glad Kurtis fixed you up.

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Re: David's GT500 Troubleshooting Thread

Post by 07Shelby500 on 4/14/2011, 8:40 pm

Big props to Kurtis and Justin over at Archangel Motorsports. They did a great job and took quite a bit of time helping me get fixed up!

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Re: David's GT500 Troubleshooting Thread

Post by Shelby10' on 4/14/2011, 8:50 pm

Had fun over at their place too....Havent seen that many supercharged mustangs in I dont know how long.

And that Challenger with the 3.6 Liquid Cooled KB was just cool.

Anyone feel free to stop by Archangels shop whenever, always welcome I am sure.

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Re: David's GT500 Troubleshooting Thread

Post by loweredf1 on 4/14/2011, 8:58 pm

that kinda shit will make you not want to do any more mods though wont it? i would like to do a few little things but i eally dont want to screw with the tune. glad ya got it straight now lets hit the track!
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Re: David's GT500 Troubleshooting Thread

Post by Leonard 95 on 4/14/2011, 9:01 pm

Should of strapped the baby smurf down! Anymore pinging since changing timing and fuel?
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Re: David's GT500 Troubleshooting Thread

Post by 07Shelby500 on 4/14/2011, 9:03 pm

Looks like no T&T this week on the TRP web site

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Re: David's GT500 Troubleshooting Thread

Post by Shelby10' on 4/14/2011, 9:27 pm

Leonard 95 wrote:Should of strapped the baby smurf down! Anymore pinging since changing timing and fuel?

Not since I pulled a degree of timing and added 2% fuel.

PM SENT on the details

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Re: David's GT500 Troubleshooting Thread

Post by Metric7 on 4/14/2011, 9:51 pm

Good news, David! Glad to hear Kurtis helped you out - mine was the first auto SN197 he ever tuned; I've always been impressed with his tuning knowledge.
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Re: David's GT500 Troubleshooting Thread

Post by 07Shelby500 on 4/14/2011, 10:04 pm

He did a great job on mine and took quite a bit of time out of his schedule to help me out. I owe him one big time.

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Re: David's GT500 Troubleshooting Thread

Post by shelbyrick on 4/14/2011, 11:54 pm

Have been watching your posts since the start glad you got your problems resolved,
as someone that has been self employed and a business owner for almost 18 years poor customer service by anyone is not the way to conduct business. hope to see your car out laying down some great times!!
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Re: David's GT500 Troubleshooting Thread

Post by BMMC1 on 4/15/2011, 9:51 am

Awesome David. Glad you got it figured out!

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