slartibardfarst 13 Posted September 14, 2018 Report Share Posted September 14, 2018 Has anyone changed theirs?  You can get smaller diameter pulleys, spinning it faster, giving more booooost. 🙂 http://www.kavsmotorsport.com/lotus-supercharger-pulley-upgrade  Easy to do? Worth it? Potential problems? Quote Link to post Share on other sites
Julius JodelÄ— 28 Posted September 25, 2018 Report Share Posted September 25, 2018 I've changed mine to a 3" from Really Light Stuff on my CUP260. Worked great! But I also change the intercooler to a larger one, also from Really Light Stuff. Anything smaller, just generates heat. The supercharger gets spun out of its efficiency envelope. I also had Jim's 2bular DT3 de-cat system and then 525-550 cc injectors are really needed. That makes a great package. Quote Link to post Share on other sites
slartibardfarst 13 Posted September 25, 2018 Author Report Share Posted September 25, 2018 Thanks for your input. I'm thinking along the lines of 77mm (3inch) along with a larger alternator pulley to slow that down and reduce any extra stress on it. A possible concern is that being an SC Elise, there is no intercooler but that should only effect air intake temps, not engine temps...right? Quote Link to post Share on other sites
Hangar 111 303 Posted September 25, 2018 Report Share Posted September 25, 2018 Since it is a factory SC Elise, leave it alone and enjoy it for what it is. Dave Quote Link to post Share on other sites
slartibardfarst 13 Posted September 25, 2018 Author Report Share Posted September 25, 2018 Yeah, i lean that way generally but for ~£60 it seems a cheap and simple update. Not it's going to cause problems though. Quote Link to post Share on other sites
Julius Jodelė 28 Posted February 5, 2019 Report Share Posted February 5, 2019 On 25/09/2018 at 13:54, slartibardfarst said: Thanks for your input. I'm thinking along the lines of 77mm (3inch) along with a larger alternator pulley to slow that down and reduce any extra stress on it. A possible concern is that being an SC Elise, there is no intercooler but that should only effect air intake temps, not engine temps...right? I fell asleep on this reply...sorry for that. Intake temperature directly effects engine temperature. And there is this pesky thing like the 1st law of thermodynamics, where the more you compress the air (smaller supercharger pulley), the hotter it gets. So, it can spiral out of control very quickly. Quote Link to post Share on other sites
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