L2 / L5 Ecu mod- No Boost cut

Newbienissan

Banned
Jul 19, 2010
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earth
other than this, adding additional vacum valve, T-joint....can also do the trick. it is a way to "cheat" the boost sensor that you "did not" reach 1bar. Proof to be able to boost up to 1.5 bar
 

E-Tech

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Jun 28, 2005
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Wrong way= car will not start
Correct way= car can start
50-50...
 

VeaRN

Junior Member
Oct 12, 2010
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Kota kinabalu
I havent install any turboed engine yet... i'm just curios :embarassed: (planning next year, coz car still on loan)
Thx for the reply though
 

E-Tech

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Jun 28, 2005
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Seach my postings.... you will find the answer here in zth. (daihatsu/diy forum section)..
tq
 

sideksepakragabulat

Active Member
Jun 28, 2011
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Kuala Lumpur
hi there,

i was using an one way valve to eliminate my boost cut before..internal part was standard only upgrade 240cc+4g93t fuel pump and a FPR..boost 1 bar at this time..

now i'm using an oversize piston+safc..before using safc fuel press is around 3 bar and the car feel smooth at all range of rpm..nowadays i have to set around 70 psi(5 bar) just to get afr around 12.22 and boost around 1.3 bar..if i disconnect the one way valve can the fuel press set a bit lower?can i still boosting more than 1 bar after removing this one way valve?i'm planning to change the tebo and up boost to around 1.5-1.7 bar..can this be achieve just by changing to a much bigger injector and fuel pump?also planning to use a gsr injector(390cc) for this target..

the main question is can i remove the one way valve and still hitting more than 1 bar just by using a safc and bigger injector?
 

penagihdadih

Known Member
Feb 9, 2012
117
17
518
Shah Alam
hi there,

i was using an one way valve to eliminate my boost cut before..internal part was standard only upgrade 240cc+4g93t fuel pump and a FPR..boost 1 bar at this time..

now i'm using an oversize piston+safc..before using safc fuel press is around 3 bar and the car feel smooth at all range of rpm..nowadays i have to set around 70 psi(5 bar) just to get afr around 12.22 and boost around 1.3 bar..if i disconnect the one way valve can the fuel press set a bit lower?can i still boosting more than 1 bar after removing this one way valve?i'm planning to change the tebo and up boost to around 1.5-1.7 bar..can this be achieve just by changing to a much bigger injector and fuel pump?also planning to use a gsr injector(390cc) for this target..

the main question is can i remove the one way valve and still hitting more than 1 bar just by using a safc and bigger injector?
removing one way valve on your map sensor will not effect your afr by much. changing to bigger injector will have a better result. 390cc with safc can boost more than 2 bar if you get the tuning correct. would recommend you to use 310cc injector.
 

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