Performance Resistor

Honest John Back Room » Technical matters
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Sat 12 Nov 2005 17:43
Performance Resistor - volvos60T5SE
Hi there. One of my (niaeve) friends bought a £5 "performance chip" from ebay, as i thought there is a small catch, all it is, is a small resistor! and it is fitted between the two connections on the IAT sensor. There is a clear increase in performance. I was wondering how these little things work and how it harms the engine, thats if it does???? any brainboxes out there know??
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Sat 12 Nov 2005 17:52
Performance Resistor - rebel
The resistor 'fools' the engine management system in thinking that the induction air temp is colder than it really is.
Colder air is more dense, therefore more fuel is injected to obtain the theoretical optimim mixture.
Most engines give more power when run a little richer - usually at the expense of fuel consumption and pollution.
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Sat 12 Nov 2005 19:48
Performance Resistor - bell boy
if fitted, the car will be constantly overfuelling and will kill the cat very very quickly,unless he has already decatted it?
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Sat 12 Nov 2005 20:04
Performance Resistor - Dynamic Dave

www.honestjohn.co.uk/forum/post/index.htm?t=21135

;o)
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