can you just put on a 2.9 pulley on a standard Exige S240 ?
What can I expect if doing that ?
[quote=Vortech]can you just put on a 2.9 pulley on a standard Exige S240 ?
What can I expect if doing that ? [/quote]
Make sure you do before and after AFR measurements … if results are not favourable you can just put the std one back on …
Read The clicky I posted above in this thread .
[quote=Vortech]can you just put on a 2.9 pulley on a standard Exige S240 ?
What can I expect if doing that ? [/quote]
Questionable AFR’s based on my ever expanding knowledge. The risk then is that the ECU will try to increase fueling and hit the max on the injectors 
what size of pulley would be safe to use, without needing to reflash or installing bigger injectors ?
Am I wrong in thinking that the 240’s already have bigger injectors than the 220’s ?
And what kind of increase in bhp would be the result ?
The biggest bang for buck surely is to get the latest 260 software first along with a higher flow pump?
Just upping the boost will swamp the standard ic I believe
Ade has said a 0.1 inch smaller pulley gives 1 psi increased boost and around 10 bhp .BUT without a better inter/chargecooler there will be heat problems …and probably fueling problems too …
When I posted the question here initially I was thinking of “my” next step …bearing in mind I already will have the latest 260/270 software ,better ic,better roof cooling,better exhaust,bigger pump etc.etc.
Only after all these boxes are ticked would I consider upping the boost.
Upping the boost is the last thing rather than the first …
Hope I’ve made sense 
[quote=Vortech]what size of pulley would be safe to use, without needing to reflash or installing bigger injectors ?
Am I wrong in thinking that the 240’s already have bigger injectors than the 220’s ?
And what kind of increase in bhp would be the result ?
[/quote]
JFK’s approach is right IMHO - I think trying to get gains in power in isolation - fitting single mods is either risky or will just cause bigger issues
Lots of part dependancies when you start messing with the standard Lotus bits
Having said the above , when I try mine I will only go 0.2 smaller and even then half expect to be needing a remap… Unless the gods are favourable and somehow maintain satisfactory AFR,s
Why has Frank gone so quiet!!! 
John, try a 3.1" I know you want too
Under orders from the missus … He will return im sure …
He better … he may owe me a keg !
Gladly m8 … when I get my mitts on Marks software !!
Well if it was my car I would not risk changing the pulley without a remap, but other people in the US have tried, also I would not go any smaller till you get a better inter cooler setup (MMG Proalloy etc.)
Also without the 260 or Gotham map as a minimum, you will not be getting full throttle opening so any smaller pulley will be quite pointless in my opinion, but at the end of the day you pays your money and makes your choice
Below is an extract for injector sizes that I’ve used on previous cars…all base on the ideal 80% duty cycle.
Injector Sizes cc
bhp Turbo SC N/A
145 231 231 185
190 303 303 242
200 319 319 255
220 351 351 281
240 383 383 306
260 414 414 332
300 478 478 383
330 526 526 421
Does anyone know if the n/a Toyota use the same injector size as a standard S?
[quote=wesj111]Does anyone know if the n/a Toyota use the same injector size as a standard S?
[/quote]
It does in Europe, US 220 S’s all got 440’s for some reason.
Boothatron
The US got 440cc as the map was different because of their crap fuel and the 330cc were then maxed out