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Author
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Topic: Pic of my Dyno Graph...Ideas?
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Yellow94GT
Mr. 60 FT
Member # 431
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posted
 
 
Well here it is. Looks great until all hell breaks loose at 5900.
I'm open to suggestions ![[Confused]](confused.gif)
[ April 25, 2006, 01:48 PM: Message edited by: Yellow94GT ]
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AED
1994 GT Bucket that will likely never run
1999 SLOLEEN Twin Turbo Coyote
2008 F250 580 RWHP 1129 RWTQ
Posts: 5990 | From: Cameron Park, Ca | Registered: Sep 2001
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CDT
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Member # 5004
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posted
any data logs?
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Custom Dyno Tuning
510.331.0608
Home of Flat Fee Tuning For All Cars, Trucks and SUV's, EFI & Carb, SCT, AFR, Dynatech, STS Turbos, N2O Refills
Posts: 1053 | From: Hayward | Registered: Nov 2004
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98slowhoe 'FIFTYLX'
Uncle Frank
Member # 895
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posted
Man dude you through it in Reverse at the end there or what? ![[Razz]](tongue.gif) ![[Big Grin]](biggrin.gif)
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AKA Franky Freaking 5 liter
Advanced Engine Development
SCT dealer
Dynotuning
Engine building
916*275*8212
88 4runner on 42's
Posts: 4206 | From: Folsom | Registered: Feb 2002
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Yellow94GT
Mr. 60 FT
Member # 431
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posted
quote:
Originally posted by CDT:
any data logs?
You would have to ask Shaun, 93Pony. I'm not sure if he saved any of it.
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AED
1994 GT Bucket that will likely never run
1999 SLOLEEN Twin Turbo Coyote
2008 F250 580 RWHP 1129 RWTQ
Posts: 5990 | From: Cameron Park, Ca | Registered: Sep 2001
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CDT
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Member # 5004
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posted
thats the way you will get to the bottom of it.
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Custom Dyno Tuning
510.331.0608
Home of Flat Fee Tuning For All Cars, Trucks and SUV's, EFI & Carb, SCT, AFR, Dynatech, STS Turbos, N2O Refills
Posts: 1053 | From: Hayward | Registered: Nov 2004
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93PONY
Mr. Valve Events
Member # 60
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posted
I'll double check the log, but I don't remember seeing anything unusual. We were in a bit of a time crunch though.....
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www.advancedenginedevelopment.com
SCT dealer
Dynotuning
(916)715-7569
Posts: 4266 | From: Fair Oaks, CA | Registered: Nov 2000
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uncle bill
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Member # 3953
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posted
looking great upto 5900,valve float?
Posts: 415 | From: antioch | Registered: Dec 2003
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JohnB
Tech Moderator
Member # 969
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posted
Compression ratio and plugs you're running with gap?
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1965 Shelby Cobra
1993 Cobra
2012 F150 Raptor
2020 GT500
Posts: 6523 | From: Orlando FL/Redding CA | Registered: Mar 2002
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Rob [5LVENOM]
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Member # 2282
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posted
Is your fuel system up to task volume wise?
Posts: 421 | Registered: Jan 2003
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BlacksheepMod50
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Member # 2378
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posted
Drew,
Thats great that you got your car dynod, but that is one messed up graph. Your car has always had problems - Is this still a continuation of the original issue that you had related to not being able to rev, or did you get that whole thing closed out?
Ryan
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98 4.6, stroked to 5.0, all forged, 11:1 comp, cams, LTs, Tubular K-member & A-Arms, Coilovers, Saleen rims, 99+ mani., ported F150 heads. And more..
Posts: 288 | From: Fair Oaks (Sacramento) | Registered: Jan 2003
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Yellow94GT
Mr. 60 FT
Member # 431
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posted
quote:
Originally posted by BlacksheepMod50:
Drew,
Thats great that you got your car dynod, but that is one messed up graph. Your car has always had problems - Is this still a continuation of the original issue that you had related to not being able to rev, or did you get that whole thing closed out?
Ryan
Appears to be the same problem ![[Roll Eyes]](rolleyes.gif)
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AED
1994 GT Bucket that will likely never run
1999 SLOLEEN Twin Turbo Coyote
2008 F250 580 RWHP 1129 RWTQ
Posts: 5990 | From: Cameron Park, Ca | Registered: Sep 2001
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BLK02GT
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Member # 5653
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posted
heres a solution...
T.O.P.'s on my 00GT ![[Smile]](smile.gif) wont have the same power but will have no idling or reving problems..i could always deal with a 400rwhp+ mustang with a reving problem jk..
nice numbers hope u get the problem fixed!
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2019 Ford Expedition Limited
2002 Ford Mustang GT
Originally Member #4241
Posts: 1247 | From: Tracy, ca | Registered: May 2005
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dynoguy
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Member # 6457
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posted
Looks like you have reached the limit of something. My first guess would be vavle control.Looks like the A/F ratio stayed fairly consistent so it seems unlikely to be spark or fuel related. The data log should confirm the health of those.
Not sure whats in this car other than the obvious blower, I'd be interested to see if there was a similar dropoff at that rpm before you went forced induction. How about some blower belt slip?
I'm also guessing this dyno isn't putting a load on the car.
You aren't really expecting it to pull to 7k are you?
[ April 25, 2006, 11:49 PM: Message edited by: dynoguy ]
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Chris
BRG Racing/Dyno
(925)680-2560
chris@brgracing.com
www.brgracing.com
Posts: 131 | From: Concord | Registered: Jan 2006
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BLK02GT
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Member # 5653
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posted
quote:
Originally posted by dynoguy:
Looks like you have reached the limit of something. My first guess would be vavle control.Looks like the A/F ratio stayed fairly consistent so it seems unlikely to be spark or fuel related. The data log should confirm the health of those.
Not sure whats in this car other than the obvious blower, I'd be interested to see if there was a similar dropoff at that rpm before you went forced induction. That would support the vavle float theory. If it was fine before, perhaps you have maxed out your current airflow potential.
the car is N/A
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2019 Ford Expedition Limited
2002 Ford Mustang GT
Originally Member #4241
Posts: 1247 | From: Tracy, ca | Registered: May 2005
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Yellow94GT
Mr. 60 FT
Member # 431
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posted
quote:
Originally posted by dynoguy:
Looks like you have reached the limit of something. My first guess would be vavle control.Looks like the A/F ratio stayed fairly consistent so it seems unlikely to be spark or fuel related. The data log should confirm the health of those.
Not sure whats in this car other than the obvious blower, I'd be interested to see if there was a similar dropoff at that rpm before you went forced induction. That would support the vavle float theory. If it was fine before, perhaps you have maxed out your current airflow potential.
Who said anything about a blower?
Blowers are bandaids ![[Wink]](wink.gif)
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AED
1994 GT Bucket that will likely never run
1999 SLOLEEN Twin Turbo Coyote
2008 F250 580 RWHP 1129 RWTQ
Posts: 5990 | From: Cameron Park, Ca | Registered: Sep 2001
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dynoguy
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Member # 6457
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posted
wow, thats pretty impressive then. sorta rules out belt slip too :-)
Tell me alittle about whats in it
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Chris
BRG Racing/Dyno
(925)680-2560
chris@brgracing.com
www.brgracing.com
Posts: 131 | From: Concord | Registered: Jan 2006
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BLK02GT
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Member # 5653
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posted
this car is so damn beautiful!! makes me wanna sell my 00GT and get another one of these...well except this time itll have a 5.0 instead of a 4.6
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2019 Ford Expedition Limited
2002 Ford Mustang GT
Originally Member #4241
Posts: 1247 | From: Tracy, ca | Registered: May 2005
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dynoguy
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Member # 6457
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posted
Thanks for the link FasterDamnit. This is definatly not the typical Mustang that i see every other day.
Very nice car! Sounds like he's got serious skills too.
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Chris
BRG Racing/Dyno
(925)680-2560
chris@brgracing.com
www.brgracing.com
Posts: 131 | From: Concord | Registered: Jan 2006
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Yellow94GT
Mr. 60 FT
Member # 431
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posted
quote:
Originally posted by FasterDamnit:
quote:
Originally posted by dynoguy:
wow, thats pretty impressive then. sorta rules out belt slip too :-)
Tell me alittle about whats in it
Belt slip? Worried his alternator isn't charging?
http://www.fordmuscle.com/archives/2005/02/YellowFever/
Seriously though. Could my little racing battery be causing me problems up top? What if there is some sort of problem with the main wire from the alternator?
BTW, thanks for the complements guys. Hope I can get this fixed and see what she can really do! ![[burnout]](graemlins/burnout.gif)
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AED
1994 GT Bucket that will likely never run
1999 SLOLEEN Twin Turbo Coyote
2008 F250 580 RWHP 1129 RWTQ
Posts: 5990 | From: Cameron Park, Ca | Registered: Sep 2001
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dynoguy
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Member # 6457
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posted
Guys, the belt slip comment was poking fun at myself, i don't know the car so when i saw the dyno sheet up in the 400+ hp range I assumed it was blown like most 400hp mustangs.
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Chris
BRG Racing/Dyno
(925)680-2560
chris@brgracing.com
www.brgracing.com
Posts: 131 | From: Concord | Registered: Jan 2006
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Yellow94GT
Mr. 60 FT
Member # 431
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posted
quote:
Originally posted by dynoguy:
Guys, the belt slip comment was poking fun at myself, i don't know the car so when i saw the dyno sheet up in the 400+ hp range I assumed it was blown like most 400hp mustangs.
I knew you were kidding at that point.
But I'm seriously wondering if a voltage drop at high RPMs may be causing this.
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AED
1994 GT Bucket that will likely never run
1999 SLOLEEN Twin Turbo Coyote
2008 F250 580 RWHP 1129 RWTQ
Posts: 5990 | From: Cameron Park, Ca | Registered: Sep 2001
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88DroptopGT
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Member # 2535
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posted
What kind of racing battery do you have? I believe the alternator should be giving you your power at those high RPM's though I'm not sure.
Spark blowing out?
Perhaps you are reaching the limit of your heads (porting)? Perhaps hot spots in the combustion chamber? That make a more erratic a/f though.
Computer issues at high rpms?
Just throwing stuff out there.
Posts: 3978 | From: 707 | Registered: Mar 2003
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98slowhoe 'FIFTYLX'
Uncle Frank
Member # 895
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posted
quote:
Originally posted by Yellow94GT:
quote:
Originally posted by dynoguy:
Guys, the belt slip comment was poking fun at myself, i don't know the car so when i saw the dyno sheet up in the 400+ hp range I assumed it was blown like most 400hp mustangs.
I knew you were kidding at that point.
But I'm seriously wondering if a voltage drop at high RPMs may be causing this.
Maybe not so much as a Drop but more that your demand generates more then your supply can handle? Couldn't hurt to switch out to a bigger battery.
[ April 26, 2006, 05:34 PM: Message edited by: 98slowhoe 'FIFTYLX' ]
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AKA Franky Freaking 5 liter
Advanced Engine Development
SCT dealer
Dynotuning
Engine building
916*275*8212
88 4runner on 42's
Posts: 4206 | From: Folsom | Registered: Feb 2002
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Hungry Hippo
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Member # 537
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posted
do you have an aftermarket ignition box? maybe try a bigger power and ground wires
or trade for both my 94's ![[worship]](graemlins/worship.gif)
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05 S4 Avant(wagon)
09 C6 H/C/I
Posts: 2959 | From: east bay | Registered: Nov 2001
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