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Cosmo 13B-RETT

Old 05-17-2006, 12:18 PM
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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.
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Old 05-17-2006, 09:55 PM
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fd twins flow 20% more, and the sequential setup works the same
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Old 05-18-2006, 11:09 AM
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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.
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Old 05-18-2006, 01:55 PM
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thanks. also, what kind of ecu mods do i need to do to run my engine? my car was originally n/a.
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Old 05-20-2006, 02:00 PM
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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...
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Old 06-12-2006, 11:19 PM
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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?
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