Well since my Honda has been vandalized and I do not have the money to fix it I have had to resort to using my RX-7 as the daily driver (fun to drive bad for gas mileage). In order to save some gas and gain some fuel economy (along with having a better tune). I got a little better mileage recently just by finally getting my idle mix set correctly (gas smell is less noticable in the car now). I also have got my float level set correctly. I would like to know what jets I should be running in my Holley setup. I understand that no matter what gas mileage is not going to be incredible but I am shooting to get better than the 15-18MPG I get right now. Here are the details of my setup.
1983 GSL
12a Stock port
Racing Beat Holley manifold (ported to be open plenum about 1" down)
600 CFM Holley 4160 series with vacuum secondaries Rotary "prepped" (drilled out air bleeds to what Racing Beat does)
50cc accelerator pump with #28? nozzle
Currently #60 jets
OMP ran into primary float bowl
Vacuum advance still used
All emissions removed
Stock header (yeah I know... LAME!)
2.25" straight pipe from stock header to Magnaflow muffler
2nd Gen Direct Fire Ignition System using Transistor Trick
Timing is set dead on to stock specs (is this fine or should I adjust? I do have a digital advance timing light so making changes is simple enough)

Thanks in advance for any help anyone is able to provide. I am just hoping to try and burn more gas than I am inhaling! LOL!

-Robert

 

Anyone? I wouldn't have posted if I wasn't able to find the info elsewhere. I know I can rejet 2 sizes down, let car warm up, re-set idle mix, set floats, and test drive but that is time consuming, wastes fuel, and expensive. I know there has to be someone that knows. Please don't just tell me that my carb is too large (I know, but I have to work with what I got).