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[Martin_1962]

Like already stated the V6 omega is a bad example because the heat in the engine bay is higher than most cars due to poor air flow through it and there for a basic cone would suck in hot air also there is far too much pipework between the filter and throttlebody a nice straight hose would be much better. Fit the same filter with a heat shield and a good cold air feed and it would perform better than standard.

The lengths are tuned to increase mid range torque

[Martin_1962]

I have done some tuning

4 or 5 bhp more on a 100cc bike

about 73bhp 46bhp on a 1600cc Sunbeam, the 27bhp was fiddly as the original engine was too small so had to find gearbox & radiator.

My 2.6 is going to be tuned while in bits, slight porting and 3.0 cams.

The DBW exhaust manifolds are much better than the 2.5/3.0 manifolds

[Weds]

This guy has a nice down to earth web site about engine tuning..

http://www.pumaracing.co.uk/

Also a general tuning section... Also cover air filters

http://www.pumaracing.co.uk/gentune.htm

[Dave Hunter]

An interesting thread, and one that crops up on all of the previous model specific forums that I frequent.  Only the very expensive intakes will yield any power gains - such as a well designed k&n unit - but gains will be minimal and will usually only appear higher in the rev range, often to the detriment of low range power.  As echoed above on an Omega I do not think you will be getting that much cool air from under the bonnet anyway.  You have to ask yourself £180 for 5bhp - is it worth it - a good service will yield more than that?

I used to always chuck a k&n panel filter in my rigs but after seeing how poorly they filtrate compared to paper and how quickly all of that oil gets on the maf and throttle body - I won’t be doing it with my Omega.

I have to confess I don’t like the idea of putting an intake on the lower grille - surely that’s just asking for trouble?  Last time I checked I don’t think engines run too well on water, slurp!

-Dave

[Kevin Wood]

I used to always chuck a k&n panel filter in my rigs but after seeing how poorly they filtrate compared to paper and how quickly all of that oil gets on the maf and throttle body - I won’t be doing it with my Omega.

I have to confess I don’t like the idea of putting an intake on the lower grille - surely that’s just asking for trouble?  Last time I checked I don’t think engines run too well on water, slurp!

-Dave

This is the other issue. A paper filter will filter adequately from new for 20k+ miles without any attention. K&N and similar filters work on a fundamentally different principle. They need to be cleaned and oiled regularly or they start letting particles through, but if you over oil them they contaminate the MAF sensor.

Kevin