Aussie Stig wrote:....The T25/T28 is a bit long in the tooth now....Seriously, what is a better solution?
There's talk of electric powered turbo chargers (ETC) instead of relying on the exhaust gases. One major automotive brand (I can't recall, either Audi or Porsche) are serioulsy looking into it.
Pros:
Major advantage of this is the elimination of the lag. As the ETC can be programmed to spool up to max levels anytime. All up to the ECU programming.
Cons:
Can be difficult (if not impossible) to retro-fit to cars not designed for it. Kinda like retro-fitting an electric powered power-steering to cars not designed to have it. Plus with cars like the MX5 (with tiny low powered batteries), the cars system might not be up to the task in providing enough juice to power it and all the cars electric functions.