upping boost

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joshassassin

Member +
hi guys i just wanted to know if i culd up the boost to .8 on standered internals and not many mods?
also what would i need to mod to acheive .8 ?
thanks guys :)
 
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peter88

Member +
Nope you don't need any mods to put it up to .8 bar any more than that and you will need some mods, fuel cut is at .85 bar I think so don't exceed it


Pete
 
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andybill

Member +
if your upping the boost your need to ATLEAST change your manifold mate, you dont want to get premature engine failure due to the standard restrictive mani..
 
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garry goodall

Member +
what mods do you already have mate, running .8 bar is all well but keeping it at there is harder if you have mods like a air filter and uprated exhaust system, as you 'de-restrict' the intake and output the more gases will flow which is what you want but you will experience such things as boost creep,

your ct9 turbo will stuggle to expell the exaust gases and you will see on your boost gauge it start to increase as you go up the rev range, if your running 0.8 bar you will hit fuel cut rather quickly making the car undrivable on boost higher up in the gears.

i know you didnt ask this question but as your new i didnt want you to overlook this factor when wanting to run more boost on a ct9, to compensate for extra mods porting of the wastegate or and external wastegate setup will see you hold a more steady boost pressure and get rid of the creep.

upping the boost to 0.8 without doing the manifold wont see very big gains so i would recommend at least a uprated mani and a decat for good measure, and keep an eye on them boost levels so you dont hit fuel cut.
 
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garry goodall

Member +
fuel cut is where the turbo is generating to much boost, this is around 0.85 bar , its the factory fail safe and at this point it will be like hitting the rev limiter, the car will jert and engine light will appear, this is the way the car stops itself from damaging the internals of the engine.

no an actuator just controls the amount of boost that is run on a turbo by contolling a little flap that bypasses exhaust gases past the turbine and though the exhaust holding the boost at a constant pressure.

little tutorial on how a turbo looks and operates

http://www.toyotagtturbo.com/forums...e-What-does-a-turbo-look-like-inside-thread-*
 
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