2nd Generation Specific (1986-1992) 1986-1992 Discussion including performance modifications and technical support sections.

Knock- what you know and what you think you know

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Old Jan 13, 2011 | 08:09 AM
  #26  
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From: aruba
subscribed, which mitsu sensor are you using exactly D wlker?

I bought a safeguard box but I'm still interested to know what my aem can do and how to set it up.

good info
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Old Jan 13, 2011 | 08:46 AM
  #27  
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I run the one for the 2nd generation DSM, the 95-99 turbo cars. The one for the 84-99 3000GT VR4 is the same with a longer lead.
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Old Jan 13, 2011 | 12:33 PM
  #28  
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^^^ couldnt agree more

i have taken several steps to make temps as low as needed:
throttle body coolant line delete
larger intercooler
larger turbo
larger inlet on the bumper
heat shields/wraps
etc.
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Old Aug 14, 2011 | 08:04 PM
  #29  
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What happens to the timing when you cancel the knock sensor on the stock t2 ecu ? Is it possible to tune it with a safc ? Will i be able to beat the car up even tho the check engine is ON ?
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Old Aug 14, 2011 | 08:07 PM
  #30  
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From: cold
Someone who has done extensive logging on an Rtek may have more insight on the knock control logic of the s4 T2. The s5 has a completely different knock control system than the s4.
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Old Aug 14, 2011 | 08:17 PM
  #31  
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From: cold
Also, just to illustrate the knocking zone a little better:



The orange area is the knocking zone but on a rotary engine it also happens to correspond with the main "squish area." A squish area is a part of the combustion chamber that has a very concentrated air/fuel mixture due to the engine geometry. Piston engines also have squish areas. Squish areas aren't "bad" things.

Here is the squish zone in a Toyota 1ZZ engine (Corolla/MRS engine):



Here they are in a Subaru 2.5 turbo boxer engine:



Here are the squish zones in a Toyota 2JZ engine, when looking at the head:

Attached Thumbnails Knock- what you know and what you think you know-rotor_squish.jpg   Knock- what you know and what you think you know-ej255_squish.png   Knock- what you know and what you think you know-2jz_squish.png   Knock- what you know and what you think you know-taper_squish.png  
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Old Aug 14, 2011 | 11:48 PM
  #32  
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From: Northern Ohio
in for info
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