BSFC Numbers for Rotary

[RICE RACING]

I have all these numbers for the 13B-REW & Cosmo in std form, street ported and various version of race porting, across all types of fuel mixture and ign timing values, (compression ratio's from 7.8:1 to 9.0:1) apex seals from 2mm to 3mm single piece and multi piece........... but it took me 15 years of work/learning to accumulate the data and not about to share it on the internet... sorry

One thing I will say! you must have the ability to measure the air mass flow rate, cause you will be surprised as to the ACTUAL volumetric efficiency of even a standard ported engine when free from OEM constraints (bolt on's)...... Wanted to add, be very careful making ASSumptions on fuel flow! (you actually need to test this). Also be even more careful relying on compressor maps (if you are doing turbo work!) you will see why when you start measuring turbine speed and trying to reconcile PR ratio's and calculated airflow rates! the more you get into this the more you see how many big fundamental mistakes you can make if using other peoples data/tables/figures.

I have never ever come across anyone (in performance game) who has accurate BSFC data that is believable (including some Racing Beat published articles on 12A Fuel injection V's Dellorto V's Holley set ups) and can be cross checked to other measures to be varified from modern rotary engines. There is plenty of very old texts that cover up to 1982/90 developments and some of those figures for BSFC on old 3mm two piece apex seals at heavy fuel mixtures in turbocharged application are flat out scary but again TOTALLY USELESS if you want to draw conclusions for your own stuff based on say a 13B-REW standard engine with associated bolt on's let alone tuning set up you have calibrated the engine too.

In short if you are doing it part time it will take you years to collect the data, you will need lots of equipment, and money and the qualifications in mechanical engineering (along with the interest to follow it through).