Upgrade From FireX to SLX? Worth it?

Hi guys, recently purchased a Boardman Team fs.
Have swapped out some of the standard parts such as wheelset and brakeset, which i felt let the bike down. However, the bike is very much XC orientated and i am gradually customising it to suit my more aggresive riding style. It came stock with a FireX 3.2 crankset but i want to go 2x9 with bash. Wandering if i should just drop the outer ring and get an e13 turbocharger or get the shimano SLX 36/22 and bash. Would i notice a difference in quality between SLX and FireX, thoughts please?
Have swapped out some of the standard parts such as wheelset and brakeset, which i felt let the bike down. However, the bike is very much XC orientated and i am gradually customising it to suit my more aggresive riding style. It came stock with a FireX 3.2 crankset but i want to go 2x9 with bash. Wandering if i should just drop the outer ring and get an e13 turbocharger or get the shimano SLX 36/22 and bash. Would i notice a difference in quality between SLX and FireX, thoughts please?

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if it works use it and fit a bash.
Parktools :?:SheldonBrown
FireX is 940gramms
The only difference you'll notice is the weight, but then if you want to fit a bash ring there's not that much point in spending out on saving weight using the SLX.
If you are looking at the E-Thirteen supercharger bash ring, they are quite hefty bits of kit... The 36T guard is 210grams; maybe something a bit lighter would suit.
Also, if you fit a bash guard, don't forget to adjust the front mech's high gear limit so you can't shift up to the third ring (as you'll have removed it); if you don't know how to do this:
"To adjust the high-gear limit, shift the chain into your highest gear, that is, smallest sprocket in the rear, and the largest sprocket in the front. The high-gear limit prevents the chain from shifting past the largest chainwheel and throwing the chain out into your pedals. Ideally you want the cage to stop just after it clears the chain on the large chainring."
SOURCE: http://bicycletutor.com/adjust-front-derailer/
What do you mean by a chain roller?
Shorten the chain? You shouldn't need to do that if you bought the bike and haven't changed the chain... A short chain is not good if you use gear (big cassette ring) (big drive ring) - which you shouldn't really use anyway
As for the chain roller I mean as in this ( see the roller on the underside of the crankset:
http://www.cycleworks.co.uk/wp-content/ ... ch-pro.jpg[/img][/quote]
Just realised that the type of thing im talking about is the e13 DRS if that helps
As for chain length, everything you need to know including calculation software is written here:
http://www.machinehead-software.co.uk/b ... hcalc.html
"As I said last time, it won't happen again."
To some extent I agree, there will be excess chain, but not to the extent it will be flapping about... The chain at its current length has to be suitable for use on both the granny and the middle rings, and therefore still perfectly use-able if removing the outer ring.
The current dérailleur should have a long cage when running 3 rings up front and Ideally, for running 2 rings up front you'd want a shorter dérailleur cage and a shorter chain, although not essential.
If shortened too much the chain would be more of a problem than in its current length, and I'd be surprised if it needs to be shorted any more than a few links at the most.
If you are removing the Big ring the chain WILL need to be resized to the new Big and Big combo. Or you just have more chain than you need.
Parktools :?:SheldonBrown
NO not just by a few links. do it right.
Go for SLX when the Firex is worn out. there is nothing wrong with it it works fine.
Parktools :?:SheldonBrown
Only reason I'm suggesting this is that at the moment the double and bash is £89 on CRC and I'm assuming a bash guard is going to cost about £40 or so on it's own. So for double if you can afford it you have a new crankset and BB as spares.
Chain length should be the same as wrapped around biggest rear cassette cog and front chain ring + 2 links to allow proper tension for reliable shifting.
Mythic Spitfire Build Thread
also when the Firex is done 10spd might be suitable.
Parktools :?:SheldonBrown
Re 10 spd I'm using a 9 speed crankset with 10 speed chain and cassette. No problems here so far.
Mythic Spitfire Build Thread
What may I ask was the problem with the Elixir R's, rotor size?