i have a cosmo 13b-re twin turbo engine, and was wondering if i could just drop in two larger turbos without having to change anything else. also, since one turbo is smaller than the other, what two sizes of turbos could i put in just to replace the stock turbos? i know it would probably be better to go with a large single turbo for more power, but i like the way the twin turbos work. thanks.

fd twins flow 20% more, and the sequential setup works the same

Build a manifold for two small turbos and run them non-seq. But then I guess that defeats the purpose.



One thing about single is that it took me 30mins last night to remove 90% of the engine. It is a lot less headache.

thanks. also, what kind of ecu mods do i need to do to run my engine? my car was originally n/a.

Well if you are running the stock engine and twin I would stick to the stock cosmo computer. Then as you upgrade put a SAFC on it and tune from there. It is much easier that way. You do not have the adjustability like a standalone but it makes it easy to tune.



Baby steps...trust me on this...

I would not use the stock ecu..1 its from an automatic.. 2 japanese ecu's are very restricted.. You can however use and S5 turbo ecu. however remember the port size in the cosmo is much larger than the stock 13b or 13b-t motor..so think of it this way..would you run a stock ecu on a ported engine?