Questions On Size Of Stock Turbos
 

Hey guys, I owned a FD until it was stolen about a year ago. I now have an Audi S4 (so I stayed with a twin turbo, or "biturbo" as Audi describes it), but I still long for my RX-7. Before I continue, I did search the archives and other websites (like Rob Robinette's & Scuderia), but I could not find the simple, straight answer I sought:

Are the primary and secondary turbos the same size? I have read where one is bigger than the other. I have also read the primary turbo has more blades on its turbine, but they are both the same size. Which is true?

I know they are both Hitachi units. They appeared to be the same size and it makes sense they are the same size since many are converted into running non-sequentially, but I just wanted to be sure.

Thanks in advance and I look forward to re-learning and maybe bring something new to the forum.

First page of a search... posted 11-04-03

https://www.rx7club.com/showthread.p...ock+turbo+size

happy reading ;)

Thanks man! I know the point is moot now, but I did do a search as evident by all the different things I found (e.g., different sized blades, smaller turbo).