ljpviper

iTrader: (3)

What is the most HP you can expect from a streetported 13b

I am debating whether to go turbo or normal asp.

back in the days i had a 13b 6 port(no porting) with dellorto and header ran 14.8 nothing spectacular

Figure a nice streetport would get the car in the 13's(i hope)

Whizbang

this is always a fun topic. doubt youll see 13s unless the car is stripped or a naturally light car (ie Starlet) and have a steeper gear ratio. (4.78)

bridgeport or PP for NA is the way to go.

13BT_RX3

Judge Ito's BP Semi-PP Cosmo 13B is up there at 310rwhp.

https://www.rx7club.com/old-school-other-rotary-63/my-rx3-sp-dyno-310-rwhp-597047/

rolfs_7

ljpviper what will this car be used for?

rolfs_7

cuz if its ur street car i would keep it NA and put a nice exhaust port it w/e u want and do some suspension work and leave it. thats what i will be doing to mine. i was going to turbo it with twins outta an FD but then i wanted somthin else and was gonna buy a T3 but then my buddy and i were talkin and i came 2 the conclusion that i can just keep it NA and kill some stangs and be happy and not have 2 worry about poping it. and if i dont like it NA im keeping parts so if i wanna turbo it all i gotta do is get the turbo.

DAVID GRIMES

He said "streetported". Ito's is not streetported.

Streetported NA with all the usual (sidedraft or Holley/Barry Grant 4 barrel carb tuned correctly, light flywheel, RB exhaust and header, manual steering, a/c off while you're running, and decent motor skills and reaction time on your driving) will put you in the 13's.

craigw1

i have 13b s5 turbo motor. dumped the turbo, street ported. still running 9.0 compression rotors (i know...i know...should have used 9.7 n/a rotors).
full RB street exhaust system and weber 48 IDA. 168rwhp (125kw)