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ExpensiveTaste ExpensiveTaste is offline
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Default 335xi dyno problem - 04-28-2012, 09:31 AM
So I brought my car to the dyno and the 4x4 light keeps on coming on. Also above 3500rpms the curve is oscillating. It made 337hp and 379tq but i feel like it should be more. What would cause this? Its a mustang dyno at efilogics.


'07 335xi JB4, CXRacing IC, BMS DCI, Meth
'95 Mustang GTS 347ci Heads,Custom Cam,Intake Manifold,Tubular Front Suspension,Full Exhaust,Big and Littles
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Default 04-28-2012, 09:36 AM
Never dynod an Xi myself but should be fine if DSC is off. You can look at DMEBT in a log to see if the DME is changing around its load target oddly. Mustang dynos are good for same day tuning but not much else IMHO. If you care about what the number is always find a dynojet.


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N54 Overall Traps World Record (11.33@132.78)__N54 Stock Turbos WR (11.25@122.86)__N54 AT Stock Turbos Traps WR (11.38@125.24)__N54 Twin Turbos WR (11.01@129.30)__N54 Stock Turbos 60-130 WR (8.39)__N54 Stock Turbos WHP WR (456whp)__N54 Stock Turbos+n2o WHP WR (542whp)__N54 Stock Turbos+n2o 60-130 WR (6.95)__N54 Stock Turbos+n2o WR (11.11@129.47)__N55 WR (11.91@117.81)__N55 WHP WR (399whp)__F30 WR(11.99@114.35)
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BobVader BobVader is offline
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Default 04-28-2012, 09:39 AM
Quote:
Originally Posted by ExpensiveTaste
So I brought my car to the dyno and the 4x4 light keeps on coming on. Also above 3500rpms the curve is oscillating. It made 337hp and 379tq but i feel like it should be more. What would cause this? Its a mustang dyno at efilogics.
normal... and 4x4 light on too...after run fews miles...4x4 disapear by itself

'08 BMW 335xi // Sedan // Black Sapphire // Sports Package//Mods: JB3 2.0|Unlocked 18ohm Board|BMS Meth kit|AA Speed Delimiter|BMS tuning gauge|UR CL DP|BMS DCI|AA Exhaust|HELIX fmic|CDV|H&R coilover|10mm Spacers H&R on 4 wheels|**Record for XI's on dragtimes.com, 11.768s@118.70**Top speed 186,4 mph GPS, vbox 60-130mph 10.18
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ExpensiveTaste ExpensiveTaste is offline
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Default 04-28-2012, 10:17 AM
Is the oscillation normal? Efi said they've never seen it before.


'07 335xi JB4, CXRacing IC, BMS DCI, Meth
'95 Mustang GTS 347ci Heads,Custom Cam,Intake Manifold,Tubular Front Suspension,Full Exhaust,Big and Littles
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Default 04-28-2012, 10:43 AM
No, oscillation is not normal. If you have a CSV email than in and we can check it out / see what is going on.


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N54 Overall Traps World Record (11.33@132.78)__N54 Stock Turbos WR (11.25@122.86)__N54 AT Stock Turbos Traps WR (11.38@125.24)__N54 Twin Turbos WR (11.01@129.30)__N54 Stock Turbos 60-130 WR (8.39)__N54 Stock Turbos WHP WR (456whp)__N54 Stock Turbos+n2o WHP WR (542whp)__N54 Stock Turbos+n2o 60-130 WR (6.95)__N54 Stock Turbos+n2o WR (11.11@129.47)__N55 WR (11.91@117.81)__N55 WHP WR (399whp)__F30 WR(11.99@114.35)
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Carl Morris Carl Morris is offline
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Default 04-28-2012, 02:39 PM
On the dyno a couple of weeks ago with my XI for the first time, I did have one run where I got a small ~10hp spike a couple of times and the dyno operator thought that it was the transfer case clutch locking up during the run...presumably because the speed difference between the front and rear had gotten too high.
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ExpensiveTaste ExpensiveTaste is offline
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Default 04-28-2012, 05:55 PM
I had map 3 on a 40 additive. I'm thinking it was a little too much without downpipes but ill get logs. Still don't know what caused the 4x4 light. There were a couple of other 335xi's that had no problem.


'07 335xi JB4, CXRacing IC, BMS DCI, Meth
'95 Mustang GTS 347ci Heads,Custom Cam,Intake Manifold,Tubular Front Suspension,Full Exhaust,Big and Littles
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chuckd05 chuckd05 is offline
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Default 04-28-2012, 10:55 PM
There dyno ready lower than others. Check there tuning threads on post.

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pits200 pits200 is offline
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Default 04-29-2012, 05:46 AM
What were the other xi's running? Where they somewhat inline with your results if they had similar mods.
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ExpensiveTaste ExpensiveTaste is offline
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Default 04-29-2012, 06:45 AM
Quote:
Originally Posted by pits200
What were the other xi's running? Where they somewhat inline with your results if they had similar mods.
I'm not sure of the exact numbers, but a factory 335xi was making around 245whp. This was my dyno graph (sorry about the quality).



'07 335xi JB4, CXRacing IC, BMS DCI, Meth
'95 Mustang GTS 347ci Heads,Custom Cam,Intake Manifold,Tubular Front Suspension,Full Exhaust,Big and Littles
The Site to go to for Home Owner Knowledge: Home Owner Basics
Last edited by ExpensiveTaste; 04-29-2012 at 07:16 AM..
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