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Jeep YJ 4.0 Turbo-Dyno video added

Old 01-18-2009, 04:25 PM
  #21  
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Default Re: Jeep YJ 4.0 Turbo

The miata guys do something similar. Pressure switch that kicks in at an adjustable pressure. Usually a -----hair before 0.0001 PSI. At that point instead of sending the narrowband voltage, it sends a pre-set voltage so the ECU thinks it needs to add fuel to stoichify ----. Works great. I'm doing something similar with my F/IC and get about 12.5 in closed loop approaching boost and in low boost at partial throttle.
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Old 01-26-2009, 09:57 PM
  #22  
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Default Re: Jeep YJ 4.0 Turbo

Dyno'd it this evening. 202.18 hp and 265.47 lb/tq. needs some more tweaking and the water/meth kit installed. air/fuel was good and max torque comes on at 2500 rpm and is pretty level across the board


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Old 01-26-2009, 10:03 PM
  #23  
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Default Re: Jeep YJ 4.0 Turbo-Dyno video added

bitchin


i wish my 4.0l had a dizzy
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Old 01-26-2009, 10:39 PM
  #24  
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Default Re: Jeep YJ 4.0 Turbo-Dyno video added

More Pete from the dyno.
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Old 01-26-2009, 10:46 PM
  #25  
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Default Re: Jeep YJ 4.0 Turbo-Dyno video added

damn thats a nice amount of power to the wheels. how much boost? still running rich?
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Old 01-26-2009, 11:01 PM
  #26  
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Default Re: Jeep YJ 4.0 Turbo-Dyno video added

It was 6.5 psi and its pig rich up top. The FMU is killing it up top. It will make much more power if it were leaner.
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Old 01-26-2009, 11:09 PM
  #27  
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Default Re: Jeep YJ 4.0 Turbo-Dyno video added

ive never been 4wheelin before. looks like a shitload of fun.....


i bet you that thing has a ---- load of low end
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Old 01-28-2009, 01:05 AM
  #28  
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Default Re: Jeep YJ 4.0 Turbo-Dyno video added

IF you are still running the 14-1 (or whatever ?-1), you can run a MBC inline to the FMU. Then you can turn down the boost the FMU is seeing therefore making the FMU a 10-1, a 8-1 whatever. Worked well for me.
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Old 01-28-2009, 08:40 AM
  #29  
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Default Re: Jeep YJ 4.0 Turbo-Dyno video added

We were actually discussing that as we were unstrapping it that night. I think that is something we are both going to try in out Jeeps to free up some power.
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Old 01-28-2009, 11:24 AM
  #30  
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Default Re: Jeep YJ 4.0 Turbo-Dyno video added

a true hmt build

no fancy computers, manifolds or bling, just tricks of the trade from guys that know what they are doing that yield results.
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