2ZZ Supercharger pulley

[slartibardfarst 13]

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?

[Julius Jodelė 28]

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.

[slartibardfarst 13]

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?

[Hangar 111 303]

Since it is a factory SC Elise, leave it alone and enjoy it for what it is.

Dave

[slartibardfarst 13]

Yeah, i lean that way generally but for ~£60 it seems a cheap and simple update.  Not it's going to cause problems though.

[Julius Jodelė 28]

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.