stg 3 cossie fuel map!!!!
14-09-2004 | 07:26 PM
#42
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Originally Posted by Eagle
right ... from what you have said stu....
a t34/35 runs leaner as the chip is not telling it to add fuel after a specific rpm .. correct????
ok .. so the map sensor does what in this equation ???
sorry but im a bit thick on this
a t34/35 runs leaner as the chip is not telling it to add fuel after a specific rpm .. correct????
ok .. so the map sensor does what in this equation ???
sorry but im a bit thick on this
Speed Density systems such as this are unfortunately quite basic and can only tell that we have pressure. For example.
If the car is mapped to inject 18ms and 22psi, the ecu will inject 18ms:
If the plenum is pressurised with 22psi but throttle almost closed
If the plenum is pressurised with 22psi but throttle wide open
If its got a T2 on it at 22psi
If its got a GT40 on it at 22psi
Its thick essentially.. it can see only pressure Pete, not Volume or Speed of air. Does that help?
14-09-2004 | 07:30 PM
#44
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Originally Posted by SECS
Stu, My original comment sums it up, any change - remap required !!
More money for MSD
More money for MSD
14-09-2004 | 07:30 PM
#45
right .. i see... so the best form would be to have a system that can actually measure the density of the air , its temperature, its pressure and a volume that has actually passed a specific point .... then adjust the fueling before and after with some form of lambda sensor????
14-09-2004 | 07:41 PM
#51
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From: Smogsville
If the car is mapped to inject 18ms and 22psi, the ecu will inject 18ms:
The reason for this, even in laymans terms is incredibly simple.
The T3 tends to make peak power in the 5 - 5500 area and as a result the fuel added from 5K is less and less and less, almost like a downhill map if you like. However, the T34 0.63 will make peak between 6 and 6.5K so the fuel map is still essentially maxed until this point....
The T3 tends to make peak power in the 5 - 5500 area and as a result the fuel added from 5K is less and less and less, almost like a downhill map if you like. However, the T34 0.63 will make peak between 6 and 6.5K so the fuel map is still essentially maxed until this point....
14-09-2004 | 07:44 PM
#52
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impreza wrx sti version 8
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From: sheffield
If this is correct then y will it run leaner the higher it revs on an off the shelf chip
14-09-2004 | 07:45 PM
#53
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From: WARWICK
Originally Posted by Rs Gus
If this is correct then y will it run leaner the higher it revs on an off the shelf chip
14-09-2004 | 07:50 PM
#56
On, and on, and on ,and on ,and on ,and on ,and on ,and on ,and on ,and on ,and on ,
and on ,and on ,and on ,and on ,and on ,and on ,and on ,and on ,and on ,and on ,
and on ,and on ,and on ,and on ,and on ,and on ,and on ,and on ,and on ,and on ,
...............
and on ,and on ,and on ,and on ,and on ,and on ,and on ,and on ,and on ,and on ,
and on ,and on ,and on ,and on ,and on ,and on ,and on ,and on ,and on ,and on ,
...............
14-09-2004 | 07:52 PM
#57
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From: Blackpool, UK Destination: Rev limiter
Originally Posted by Alps Pacino
If the car is mapped to inject 18ms and 22psi, the ecu will inject 18ms:
The reason for this, even in laymans terms is incredibly simple.
The T3 tends to make peak power in the 5 - 5500 area and as a result the fuel added from 5K is less and less and less, almost like a downhill map if you like. However, the T34 0.63 will make peak between 6 and 6.5K so the fuel map is still essentially maxed until this point....
The T3 tends to make peak power in the 5 - 5500 area and as a result the fuel added from 5K is less and less and less, almost like a downhill map if you like. However, the T34 0.63 will make peak between 6 and 6.5K so the fuel map is still essentially maxed until this point....
A) Run excessively rich.
B) Lose horsepower.
C) Use loads of fuel.
Originally Posted by Eagle
turn the fuel pressure up a bit then 
14-09-2004 | 07:53 PM
#58
Originally Posted by SECS
On, and on, and on ,and on ,and on ,and on ,and on ,and on ,and on ,and on ,and on ,
and on ,and on ,and on ,and on ,and on ,and on ,and on ,and on ,and on ,and on ,
and on ,and on ,and on ,and on ,and on ,and on ,and on ,and on ,and on ,and on ,
...............
and on ,and on ,and on ,and on ,and on ,and on ,and on ,and on ,and on ,and on ,
and on ,and on ,and on ,and on ,and on ,and on ,and on ,and on ,and on ,and on ,
...............
14-09-2004 | 07:54 PM
#60
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From: Gloucestershire
Originally Posted by Alps Pacino
because the mass airflow is more than a t3 so it needs more fuel not rocket science is it?
fooking hell spank my arse i am trying to learn 
14-09-2004 | 07:57 PM
#63
Right, this is guaranteed to start a discussion......and make STU very busy.
Now that 4 star LRP is going and in 2008, High octane fuel (over 95 ron) will be witdrawn from
general sale due to dangerous additives.......
There will be a sh*t load of remapping required or octane booster sales will rocket !
Now that 4 star LRP is going and in 2008, High octane fuel (over 95 ron) will be witdrawn from
general sale due to dangerous additives.......
There will be a sh*t load of remapping required or octane booster sales will rocket !
14-09-2004 | 08:01 PM
#64
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Im busy enough 
Im currently at work after eating a fine carvery at the local pub and returning her to go out and finish a 2wd map whilst its quiet.
Of course its pissin it down so ive retired to PassionFord to pass the time away.....
Im currently at work after eating a fine carvery at the local pub and returning her to go out and finish a 2wd map whilst its quiet.
Of course its pissin it down so ive retired to PassionFord to pass the time away.....
14-09-2004 | 08:13 PM
#70
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impreza wrx sti version 8
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From: sheffield
Originally Posted by RichardPON
I wont even comment on this topic.
I'm running 803s, Ahmed 310 chip (Stage 3 T3), T34, 22 psi
I'm running 803s, Ahmed 310 chip (Stage 3 T3), T34, 22 psi
14-09-2004 | 08:16 PM
#72
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From: Wiltshire UK
Originally Posted by Stu @ M Developments
Speed Density systems such as this are unfortunately quite basic and can only tell that we have pressure. For example.
If the car is mapped to inject 18ms and 22psi, the ecu will inject 18ms:
If the plenum is pressurised with 22psi but throttle almost closed
If the plenum is pressurised with 22psi but throttle wide open
If its got a T2 on it at 22psi
If its got a GT40 on it at 22psi
Its thick essentially.. it can see only pressure Pete, not Volume or Speed of air. Does that help?
If the car is mapped to inject 18ms and 22psi, the ecu will inject 18ms:
If the plenum is pressurised with 22psi but throttle almost closed
If the plenum is pressurised with 22psi but throttle wide open
If its got a T2 on it at 22psi
If its got a GT40 on it at 22psi
Its thick essentially.. it can see only pressure Pete, not Volume or Speed of air. Does that help?
At the risk of making myself look a tit here - it's been a long day...
For a given engine and constant Inlet air temp, **edit to add - and at a fixed rpm ** can u explain how the airflow into the engine will vary with that fixed 22psi plenum pressure, irrespective of what is generating it?
I should be able to answer this myself, but just for now it's escaping me..
14-09-2004 | 08:20 PM
#75
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Originally Posted by richm
Originally Posted by Stu @ M Developments
Speed Density systems such as this are unfortunately quite basic and can only tell that we have pressure. For example.
If the car is mapped to inject 18ms and 22psi, the ecu will inject 18ms:
If the plenum is pressurised with 22psi but throttle almost closed
If the plenum is pressurised with 22psi but throttle wide open
If its got a T2 on it at 22psi
If its got a GT40 on it at 22psi
Its thick essentially.. it can see only pressure Pete, not Volume or Speed of air. Does that help?
If the car is mapped to inject 18ms and 22psi, the ecu will inject 18ms:
If the plenum is pressurised with 22psi but throttle almost closed
If the plenum is pressurised with 22psi but throttle wide open
If its got a T2 on it at 22psi
If its got a GT40 on it at 22psi
Its thick essentially.. it can see only pressure Pete, not Volume or Speed of air. Does that help?
At the risk of making myself look a tit here - it's been a long day...
For a given engine and constant Inlet air temp, can u explain how the airflow into the engine will vary with that fixed 22psi plenum pressure, irrespective of what is generating it?
I should be able to answer this myself, but just for now it's escaping me..
)
14-09-2004 | 08:21 PM
#76
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From: Smogsville
i think what he is getting at is whats the difference between the t3 feeding the engine 22psi and a t34 doing the same i would like to know also and dont be shooting me this time gus
14-09-2004 | 08:21 PM
#77
Any change in the engine air inlet/exhaust can upset flow of air
even if pressure is constant and the wastgate attemps to hold pressure NOT flow.
Turbo size compressor and exhaust housings, cams type/timing, port sizes.
You should know this Rich
even if pressure is constant and the wastgate attemps to hold pressure NOT flow.
Turbo size compressor and exhaust housings, cams type/timing, port sizes.
You should know this Rich
14-09-2004 | 08:22 PM
#78
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From: newcastle upon tyne
ya know , its at times like this i just sit and read this stuff and think just what a clever shite stu is, you dont realise just what goes into modifying when done properly do you!
stu you are one clever lad.....we are not worthy!
i never realised you needed a new chip when you got a t34 untill today when i was told
, but stu's gonna sort me out , 
stu you are one clever lad.....we are not worthy!
i never realised you needed a new chip when you got a t34 untill today when i was told
, but stu's gonna sort me out ,