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> Power Loss, Turning up Boost
post May 11, 2013 - 9:35 AM
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Island_Racer

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Hello,
I am wondering how i see people talking about turning up boost to 17psi on their CT20's yet no one had specified whether they changed spark plug gap nor retarded timing at all......So i turnt up my boost to 17 psi and was looking to see what happens.....sure enough i lost power on hitting my boost mark and saw leaning out on my gauges. Anyone else had this problem?

So i wanna know what plug gap the stock motor 17 psi users have
also how much to draw on the timing...if that will help

Just as a starting point. o, i doubt it is fuel.....at idle my car shows 30 psi and while driving it has maybe 35-37 psi higher than pressure (aka 5psi boost = 40-42 psi fuel....10 psi boost = 45-47 psi fuel)

This post has been edited by Island_Racer: May 11, 2013 - 10:50 AM
 
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post May 11, 2013 - 5:52 PM
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presure2



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fuel will have a huge impact on how the ECU responds as far as knock response and pulling timing like your discribing.

I would suggest looking into water injection as you want to turn up the boost, it effectively adds octane and cools combustion temps at the same time, which really helps if you have only 87 or 90 octane fuel.
it is totally normal to notice a diffrence between east coast guys that can get 93 or 94 octane and guys that can only get 91. (or worse, like in your case) the 3rd gen really runs best with 98+ (using the japan octane rating, which from what i've read is about equal to the us 93 or 94 octane.)


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