Hey all I have a 85 rx7 with a i think repu 4 port 13b with the tall center ports thats full bridgported with a 48 ida just looking for some jetting advice in it right now I have f11 emulsion 235 fuel and 165 air stock idles 10f70 120
runs allright but very rich hooked up an afr and im crusing in the 11s half throttle is about 13s and wot is rich early in the revs around 11s then hits perfect around 12.5 from 4500 to 5500 and then starts to richen as it gets further in the revs and starts hitting around the high 10s at around 7500 8k. Looking for advice where I shouod go with the jetting before I start just buying and testing a bunch of different sizes also has a cxracing 2.5inch header as whoever put my motor together pulled the exaust sleeves and the a 2.5 pipe out the back with 2 mufflers

 

You're using RacingBeats numbers for a 51 IDA, you don't mention what chokes you're running but I'm sure it's smaller than theirs so, more 'signal'. You'll need to trim your cruise with your idle circuit as best you can, I'd probably try a 225 main to target closer to 13:1 between 4500 and 5000, then start throwing a bigger air at it. Like a 190 maybe.

Tube: F11
Main: 225
Air: 190
Idle: Try a 60F10 and go against the grain RE the whole '3/4 turn out' of the idle bleed screw.

 

Ok sick thank you gonna get those ordered forgot to mention the chokes I just have 42s in it also forgot to mention i have my idle mix rich af cause it stumbles and I get a lean spike when getting back on throttle and in between shifts and also flamethrower lol and I figure its good to idle rich cause more premix on decel