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Location:
Melbourne
Registered:
June 2003
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st185 injectors into st162
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Mon, 07 June 2004 02:07
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By puting the turbo injectors on will there be ne difference in power?
Thanks
Daz
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Location:
Colac, Victoria
Registered:
May 2002
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Re: st185 injectors into st162
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Mon, 07 June 2004 02:32
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are you planning on aftermarket ecu's cams or the such ?
if so theres not much point, though if powerpods are planned you might want to look at them down the track
PS: did you still want my red calipers ?
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Location:
South Australia
Registered:
July 2002
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Re: st185 injectors into st162
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Mon, 07 June 2004 06:51
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I'll state this again, if you want to use bigger injectors (ie more fuel and more kW), you will need to start by flowing more air. If you use bigger (turbo sized) injectors with standard amount of air flow, you will probably get a drop in performance due to worse atomisation at the lower air flow. (the air gets saturated quicker because it is colder, and there is less air mass for the fuel to atomise in etc etc)
Fuel is only half of the equation...air is usually the more important half 
You would have to be flowing quite a bit of air to require larger injectors than the factory ones.
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Location:
MACKAY
Registered:
May 2002
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Re: st185 injectors into st162
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Mon, 07 June 2004 09:55
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185 injectors are side feed and 162 injectors are top feed , Not interchangeable , and you will lose power by putting bigger injectors into a standard motor as the factory set fuel mixture is already rich under full load , If you can lean out the mixtures under load you will gain power .
Trevor
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Location:
South Australia
Registered:
July 2002
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Re: st185 injectors into st162
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Mon, 07 June 2004 12:30
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I disagree - see above post
If you can lean out the mixture then you would gain power with the factory injectors...it would be a waste of money *unless* you are flowing a bugger-load more air than the factory engine.
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Location:
MACKAY
Registered:
May 2002
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Re: st185 injectors into st162
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Mon, 07 June 2004 13:53
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I fit and tune piggy back ecu's and leaning out the mixtures and adding a bit of ignition advance can give up to 20kw at the wheels increase on some cars.
Trevor
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Location:
South Australia
Registered:
July 2002
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Re: st185 injectors into st162
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Mon, 07 June 2004 15:20
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But why have bigger injectors for a leaner mixture 
Also - leaning out the mixture and increasing ignition advance, whilst power wise can be a good thing, it generally means the engine is going to
a) Have illegally high emissions (which I'm guessing is not the point of fitting a piggy back ECU)
b) Run a heck of alot hotter which could result in early engine internal failure.
The factory ECUs are detuned for specific reasons, it doesn't mean the ECU is bad (although in the 1st gen 3S-GE's case the ECU is bad) it just means it is tuned a certain way.
Have you done many 1st gen 3S-GEs btw? I've heard they aren't so worthwhile/easy in regards to piggybacking?
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Location:
Kita-Ku, Sapporo, Japan
Registered:
January 2003
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Re: st185 injectors into st162
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Mon, 07 June 2004 15:31
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| FWDboy wrote on Tue, 08 June 2004 01:20 |
But why have bigger injectors for a leaner mixture
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heh heh 
if the ECU's mapping is not changed all you will do is achieve worse fuel economy..
you need to have a reason to have larger injectors, ie greater fuel demand, as FWDboy said, from more AIR going into the motor... like a turbo perhaps
stocko ECU's are not only tuned for emissions, but also to aid motor longevity 
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Location:
Melbourne
Registered:
June 2003
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Re: st185 injectors into st162
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Tue, 08 June 2004 02:10
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Thanks peepz!!
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Location:
South Australia
Registered:
July 2002
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Re: st185 injectors into st162
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Tue, 08 June 2004 02:17
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| FWDboy wrote on Mon, 07 June 2004 22:00 |
I disagree - see above post
If you can lean out the mixture then you would gain power with the factory injectors...it would be a waste of money *unless* you are flowing a bugger-load more air than the factory engine.
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I just thought I'd clarify this in case you thought that i meant a leaner mixture won't make more power.
What I mean, is that if you are able to lean out the mixture using something like a piggy back ECU, then regardless of whether you have bigger injectors or factory injectors, you will gain the same amount of power. In fact, you'll probably gain less power with the bigger injectors - again - due to the poor atomisation of such a short open cycle.
I re-read what I wrote and I could see it was easily misinterpreted.
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