Throttle body size...
 

For a turbo b18c1, whwat size throttle body should i get?

70mm would be best...

well, if its too big, then i'll lose back pressure and that means i lose low end torque....so are you sure a 70mm would be best for a turbo b18c1?

You'll lose velocity not backpressure, but with a small fast spooling turbo it wouldnt matter too much anyway. I wouldnt even bother switching it out.

too big? i'd say it's too big for factory compression for a naturally aspirated honda but for a turbocharged honda, you'd want a 70mm throttle body streetable... you'd see up to 85 mm on 25+psi drag hondas...

i see...thanks.

I make quite a bit on a 65mm and it revs to 10.5K. If you want more Edelbrock will release a 70 and 75mm with an adapter in June