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General Engine Management / Tuning Forum Discuss general EMS tuning concepts that do not pertain to a specfic brand or product.

Well, the gt-35 is in, UTEC tuning time..

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Old Apr 3, 2005 | 08:30 PM
  #31  
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I think MJ has it right. The big turbo is stalling out the MAF and it just dies, or somthing like that. Ime wondering if i should have gone with the gt-30.
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Old Apr 3, 2005 | 09:07 PM
  #32  
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Yeah, I don't have any sort of stalling issue thanks to the blowthrough MAF, it just doesn't get airflow disrupted... Ever..
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Old Apr 3, 2005 | 10:04 PM
  #33  
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o.k. Jack, i bought a Ultimate Racing Blow through also awhile ago. Havnt put it on yet. Does the BOV need to go on before it or after it on the upper pipe??? And i wonder if that would help my stalling also?? Jack, i wish i could have given you a ride today. My accidental 28PSI blast off was incredible!!! Thank god i had good fuel in the car. Have to get the EVC fixed...... ray
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Old Apr 4, 2005 | 08:09 AM
  #34  
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Jack, do you think the HKS EIDS would help keep me from stalling?? Ray
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Old Apr 4, 2005 | 08:13 AM
  #35  
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Originally Posted by rraulston
Jack, do you think the HKS EIDS would help keep me from stalling?? Ray
The stalling is due to the turbulance in the maf housing. It is not a good idea to use it in conjuction with a UTEC.

Thanks,

Jermaine~
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Old Apr 6, 2005 | 02:07 PM
  #36  
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Have you thought about re-installing your stock airbox in order to limit the amount of turbulance in the MAF?
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Old Apr 6, 2005 | 09:35 PM
  #37  
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I would recommend against the EIDS in your specific setup.. the blowthrough setup will help quite a bit since its not "annoyed" by turbulence and low airflow.. Keep in mind that the blowthrough setup will take some time to get "just right" but it will work very nicely once you get everything together.

Oh, and the EIDS "Slows" the MAF's response to sudden changes, thats how it prevents stalling since it Numbs its sensistivity to turbulence or sudden drops in frequency (VTA blowoff), unfortunately, if you need rapid response to changing fuel demand, its not a good idea to use.

Anyone considering using the EIDS and the UTEC, the EIDS goes between the UTEC and the ECU, this way you won't hurt the UTEC's ability to respond quickly to fueling. BE AWARE that they don't recommend doing this, and its a last resort since you'll void your UTEC warranty if you cut into the wiring..

Have some patience, I'm sure that the guys at TurboXS have a laundry list of upcoming additons and revisions from the suggestions we've made..

I see these few features being the most important..

IDLE speed Control with target speed
IDLE MAF Clamp (minimum signal)
"Forced" Diagnostic open loop mode for tuning idle
tip-in throttle MAF bump
Two-step launch control (one for launch, second different value if your moving)
Native support of a 5v analog (Ford/Hitachi/Pro-Flow) MAF sensor, Ford AIT, etc..
(I think a blowthrough or alternative MAF is a better choice than a speed density conversion, but either is better than neither)

And you may find that JJ_008 has a good point, you might want to try running the stock airbox to see if the airflow anomolies can be lessened to help your idle.. But honestly, its likely that with the large injectors, cam duration/overlap, large turbo, your idle airflow rate is so low, that its having trouble maintaining any sort of karmann signal (karmann sensors will begin to operate erratically if airflow drops below 30hz (on the sensor itself, not the modified output) If the sensor misreads altogether, it drops to open-loop mode and runs cold-start trims based on AIT/Baro reading..
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