pierre smith
Well Known Member
After mailing injector orifices back 'n forth for a week or more and half a dozen phone calls, Don suggested that I just fly up there and get it done, so I did.
We flew and he took EGT readings every .2 GPH down to LOP and we landed and switched inserts around, based on the fuel flows and EGT's and went up again, running 23"/2400 and started leaning at the same rate again and it amazed me to see how close they had become and he suggested 8500' for some full throttle testing. After we got there, he started leaning again, all the way down to 11GPH...something I'd never seen but at an airspeed cost...down to 170 something MPH but getting over 17 MPG according to the Dynon EMS and all the temps were very close.
On the way home, I went for 50 LOP (remember, I'm old school at 65 years old and never leaned this far in years gone by) and fuel flow was around 13 GPH/190 TAS...2GPH better than before and getting 15 MPG instead of 13-13 1/2.
A good day indeed and well spent with a very knowledgeable guy. If you haven't had your injectors tweaked and matched, you can't go wrong up at Airflow, in Spartanburg, S.C.
I still have the choice of running 202 MPH true but now down in the 14+ GPH range, instead of 15 1/2 or more if I just have to go fast, or do 190 at 13 GPH, my choice.
Happy camper,
We flew and he took EGT readings every .2 GPH down to LOP and we landed and switched inserts around, based on the fuel flows and EGT's and went up again, running 23"/2400 and started leaning at the same rate again and it amazed me to see how close they had become and he suggested 8500' for some full throttle testing. After we got there, he started leaning again, all the way down to 11GPH...something I'd never seen but at an airspeed cost...down to 170 something MPH but getting over 17 MPG according to the Dynon EMS and all the temps were very close.
On the way home, I went for 50 LOP (remember, I'm old school at 65 years old and never leaned this far in years gone by) and fuel flow was around 13 GPH/190 TAS...2GPH better than before and getting 15 MPG instead of 13-13 1/2.
A good day indeed and well spent with a very knowledgeable guy. If you haven't had your injectors tweaked and matched, you can't go wrong up at Airflow, in Spartanburg, S.C.
I still have the choice of running 202 MPH true but now down in the 14+ GPH range, instead of 15 1/2 or more if I just have to go fast, or do 190 at 13 GPH, my choice.
Happy camper,
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