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Location:
Adelaide
Registered:
May 2002
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Re: 4age bigport. taking advantage.
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Thu, 15 April 2004 11:31
 
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I think you may be lacking some knowledge when it comes down to basic inlet system workings.
The ECU has nothing to do with the pressure of the fuel/air mix. The ECU will supply the 'correct' amount of fuel (pre-programmed amount) for the amount of air the load sensing device tells it the Engine os consuming.
Bigger injectors are pointless unless the current ones are unable to supply enough fuel (with reserve duty cycle) at your fuel systems operating pressure for the volume of air consumed by the engine.
N/A performance is pretty much reliant on the efficeiency of the inlet system. But as most things in life there are compromises. A max torque @ max revs inlet/camming systems is different to a max torque @ mid revs inlet/camming system.
Without a doubt the inlet systems will need revising, but you must think about your goals. Your goals will dictate such things as the following (but not limited to):
- Runner length
- Plenum size
- Inlet cam duration/timing
- Throttling
- Tuning
Excellent Inlet systems have been done many times before, just look at race cars. Some teams have even managed >100% inlet system efficeincy. That means thet through excellent timing and design a cylinder is able to be filled with more air than its swept capacity.
However use race teams only as a guide. What works for them does so under their exact circumstances and may prove useless to you...
Concentrate on just making a complete low restriction inlet tuned for a specific band with cams, timing and tuning to suit.
For us normal non-thermodynamic engineer types, there is the gift to torquey street cars of, you guessed it - forced induction!
Rex
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