13B Rotary Motor

[JrSyko]

My uncle has a buggy with a 1986 13B rotory motor in it and is having problems with the jetting. He is running a 48IDA Weber Carberator, which is what he has been told to run, but what jetting do you guys recomend? He uses it mostly to just run around Baja a little bit and out in the dunes.

[SPONSOR]

Membership in the largest desert racing community has its advantages - Participate in Forum Discussions - Send and Receive Private Messages - Maintain Public Photo Albums - Access to Groups - User Profile in our Social Network - Increased Access to more Sub Forums - Reduced Online Advertisements Join our community today

[toyoter91]

i dont know much about what jetting you should use. but i know the guys over at www.rx7club.com know their rotorys quite well. hope this helps.

[1992f150]

how does he like the power? I was thinking of doing the same thing for my buggy, n/a 13b with carb conversion.

[GBRACER]

I run a 13B in my car and do very well with it, the carburation issue take it to a guy that knows webbers they have an off idle stumble that is tricky to cure.
I run a stock 4 barrel carb that is modified and jetted to the max.
You can't buy cheaper more reliable power.
10 000rpm all day.
Grant.

[ntsqd]

BAck when I was working in road racing the cheap carb set-up on a rotary was a Holley 390 CFM 4bbl. Not sure what, if any, inside tricks were needed.

Second finding a guy with hands-on knowledge of tuning Webers. One of the best is Dave Evans of EvanSpeed in the greater Pasadena area. He tunes with a 3 gas analyzer on a chassis dyno that is portable.