Originally posted by 1BAD7
i just now took a look at this thread and figured id post on this topic since i have experience in the 20b fc area.
as everyone has pointed out the 20b is going to be a bit pricey to get but still not out of this world. my friends got theirs from our buddy who is still stationed in japan. you can buy them blown for decently cheap. the custom work isn't all that out of this world. but i would reccomend doing nothing less than a standalone ems for management. if your going to run a single turbo setup(which is your best bet) your going to have to have a custom manifold built which is going to be a pretty decent amount of change. bigger fuel pump etc etc. basically all the same type of things you will have to do to a 13b if you want to make any type of power. motor mounts as well. as far as the 20b's being harder to tune, i would have to disagree. more complex yes but still based on all the same principles of tuning 2 rotors. holding together while making n e type of power again i would have to disagree. i have a friend in japan that is about to bring his car here to arizona making alota power still not fully tuned with no issues. ill post his dyno sheet in a bit. but now on to my opinion. because i have been around a couple of 20b fc swapped cars i can tell you its a bit of headaches and empty wallets. granted once they got them they loved them but the road there can be testing. i favor making tons of power with the 2 rotor motors ie: 13bt, or 13b rew, or 13bre motor. if your preferential to the stock twins you can keep them and it will fit in a fc and make good power. any of these motors are decent prices and once ported are capable of excellent power. as mentioned before with the right work done to them and tuned correctly you will make plenty of power to run n e where from 12s down to very low 10s in a street type car. sorry if i left n e thing out its been a long day with no sleep. hope ive helped some
I have a friend whos doing a 13BRE Cosmo,in a FC and it did not fit with TT,He had to go to single.
I havent seen any FC running stock twins.