Post by oldschool on Jun 7, 2007 16:05:01 GMT
Reading through some forums a number of people seem to have an urge to make this topic one for disputes.
First of all the most 'clever' ones would like to bring a lot of the products in disrepute by claiming it isn't possible to have any noticeable power gains. If anyone likes to claim this than we ask for proof of it. Otherwise we do not want to get any such discussions started! Any unfounded comments will be deleted in due course.
Some other claims are that an induction kit that gives a peak 'power increase of 1.3bhp aren't worth the money' (qoute from another thread). If looked at the power figures they might be correct in one single case, which would be when the peak power delivery is increased by the claimed figure at the very same rpm point. This is virtually impossible to be the case, which in turn should make quite clear that there is something more to it. This is torque, which is related to bhp.
The change of the intake characteristic will change the torque delivery and therefore the power delivery. This means that the power increase over the rev will neither be constant in terms of absolute figures nor in terms of percentage. Whoever is familiar with the Thiele-Small parameters does understand the problem.
Induction development is a precise science and can be mathematically determined. In other words the power delivery can be determined within reason throughout the rpm range.
Depending on the design power can be lost as it can be gained or even both at different sections of the rpm range.
Torque increases can be in double numbers over the standard induction when calculated right. This obviously depends on how much effort the manufacturer puts into the development of the induction.
In most of the applications the peak torque for a properly designed induction kit for any of the FIRE engined cars and virtually all Fiat group petrol engines that have naturally aspirated engines is in the region of 12 to 16%.
First of all the most 'clever' ones would like to bring a lot of the products in disrepute by claiming it isn't possible to have any noticeable power gains. If anyone likes to claim this than we ask for proof of it. Otherwise we do not want to get any such discussions started! Any unfounded comments will be deleted in due course.
Some other claims are that an induction kit that gives a peak 'power increase of 1.3bhp aren't worth the money' (qoute from another thread). If looked at the power figures they might be correct in one single case, which would be when the peak power delivery is increased by the claimed figure at the very same rpm point. This is virtually impossible to be the case, which in turn should make quite clear that there is something more to it. This is torque, which is related to bhp.
The change of the intake characteristic will change the torque delivery and therefore the power delivery. This means that the power increase over the rev will neither be constant in terms of absolute figures nor in terms of percentage. Whoever is familiar with the Thiele-Small parameters does understand the problem.
Induction development is a precise science and can be mathematically determined. In other words the power delivery can be determined within reason throughout the rpm range.
Depending on the design power can be lost as it can be gained or even both at different sections of the rpm range.
Torque increases can be in double numbers over the standard induction when calculated right. This obviously depends on how much effort the manufacturer puts into the development of the induction.
In most of the applications the peak torque for a properly designed induction kit for any of the FIRE engined cars and virtually all Fiat group petrol engines that have naturally aspirated engines is in the region of 12 to 16%.