Originally Posted by Toisich-jnr
Thanks for the info. Only jusy bought the 1.6 and didn't see anything else on sale in Scotland with low mileage so will be keeping it.
How about an exhaust change only? Will that produce some extra BHPs?
I see where you're coming from - I couldn't find a 2 litre in decent nick for reasonable money so end up buying my dad's 1.6. I looked into upping the power to QV levels but soon reaslised it wasn't going to happen so I've left it standard.
If you do want to have a play, the best order to do things in seems to be filter, exhaust then chip which takes other mods into account.
Ask yourself this - why does a performance filter let air more air in / let air in faster? Because the holes are bigger. That means it lets more crap in to the engine too. It's a balance thing - level of filtration vs air flow. The only way to get around that is to have a filter with a bigger surface area (which is why cone filters are pleated). BUT it seems that a lot of people who have tried cone filters on 145 TSs have found they have gained high end power, but lost low end grunt. Maybe Alfa did their homework when they were designing the thing after all. A good inline filter with a big cold air feed makes some sense - the BMC CDA is a good example and I've heard good reports about it. Luckily you can put the cheaper one on the 1.6 too.
As for the exhaust... the downpipes on the TS are reckoned to be pretty good and so probably not worth messing with. Beyond there there are two things holding up the air - the cat and the middle (triangular!) silencer. A decat and no middle silencer should make a difference. Which one you go for depends on how loud you want / don't want it. Louder sounds faster I guess!
As for the chip. Well on a 1.6 it's not actually a chip. You can't just throw in a chip on this engine like the 2 litre. You have to go for a remap of the existing system IIRC. You can either buy a 'standard' job but, if you've already made other changes then it makes sense to get a custom one done on a rolling road.
problem is that after you've done all of this, your car still won't be as quick as a standard QV! Even a 20 per cent increase in power (and that's being pretty optimistic!) will only take you to 144bhp, which happens to be the standard output of the 1.8. If you want to go further you can start looking at lairy cams, fancy throttle bodies etc but you're looking at serious money and what - maybe 160bhp?