bhp

[20B_boy]

The stocks run sequentially; the primary gets all gas until a set rpm/boost pressure is achieved, then the secondary is prespooled and comes online around 3800-4000. At that point both turbos are working together. Both turbos are the same size incidentally.

A non-sequential twin set up runs both turbos all the time; in the case of the 13B there\'s a turbo for each rotor.

You can set the stock twins up to run non-seq, people seem to do this with varied success.

[iiyama]

Thought they were different sizes? How wrong could I be!

Was thinking along the lines of going slightly bigger twins rather the the big single route, but hey, thats all in the future!! :-)

Ian

[FDDreamer]

Thanks again, Rich!

I also thought they were diff sizes...interesting! Makes sense to have one per rotor too, hadn\'t thought of that. Also didn\'t realise #2 came \'on\' at those rpms...no wonder i read a bit about turbo lag in big singles, must be a very different driving experience.

[20B_boy]

Originally posted by iiyama
Thought they were different sizes? How wrong could I be!

Nope they are the same size; the twin turbos on the cosmo however are different i.e. primary slightly smaller...

A stock car with twin turbos running as they should is a lovely car to drive. One of the nicest/fun FD\'s I\'ve driven was an old low mile car, pretty much stock power but on stiffer/lower suspension. Thrashability 10/10, nice and stiff for oversteer fun

A big ported turbo\'d car is very different. You cant beat that "ok-thats-fast-I\'m-scared-now"-feeling as you plant your boot and watch the boost gauge go past 1bar

[iiyama]

Well ya learn sumthin new everyday! So what if a larger secondary was installed? Or indeed both turbo\'s were made proportionally larger?

More drivavable then a large single with as much grunt? Or just an even bigger headache? LOL

Ian