Turbo II Turbo or 20B Twins?
 

I am putting a 13BRE engine into my FD and using all my FD parts including front cover and vacume lines ect.. the only difference will be the block and the intake manifolds will be RE and all else will be FD. I am aware that the 20B turbos are slightly larger than the REW twins so I was thinking of getting the 20B twins and using them OR use a turbo II turbo and make things simpler in the rats nest.
what would be better performance? I have the FC turbo and manifold and racing beat down pipe already in spare parts and also have a nice set of FD twins currently.
Thanks,
Jeremy

You're talking about removing the turbos off the 20B set and swapping them for the Cosmo 13B-RE turbos, right?


-Ted

yeah, putting the 20B turbos on my new FD-RE block.

single turbo is easier
 

dude none of the piping is going to line up at all, and while I am not sure about the cosmo 13b, the 20b manifold stock is set up with one turbo slightly larger, than an fd, and the other (i think) is slightly smaller than an FD. seems to me that a stock single thats had the hot side clipped for higher flow would be fine ans dandy for street use. anybody else got any ideas?

ken

ok so i guess making a hybrid FD/20B twin turbo and replacing the smaller 20b turbo with a FD one is not going to work? or just too much a pain in the rear for the amount of difference it will make? I also found out that this FC turbo i have has a fairly new rebuild kit done to it and it seems to spin freely and no play at all, but if i do use it that would mean i would have to make some oil lines for the inlet on the turbo from the block and the oil returns? and also the water in's and out's? and also make the FC DP i have work with my FD piping and also get the intake pipes to work and also the pipe going from the turbo to the IC. hmm... anybody? maybe stick with the FD twins untill i go aftermarket single when i feel like spending the $1500 or so for the whole kit?

Just go single, so much less complicated.