So,
We completed our RV7 - 3 years ago, dual P-Mags, very happy with the service and performance, however.......
CHT's were high from the get go.
We have an ECI IO-360 180hp parallel valve motor made with care, love and attention by Mattituck - Thank you Mahlon.....
Running NGK BR9EIX on top and Unison UREM40E on the bottom, both harnesses made up and tested by me.
CHT's were in the 400's on climb and when stunting.
In the cruise, lean of peak, they would drop to 370f.
Did a LOP balance check in accordance with Mahlon's instructions.
Also, big split on EGT's when taxiing. 1 & 3, lower than 2 & 4 by a good margin.
It has a plenum which is well sealed, we have a little ventilation down the back as per recent threads.
That is the background - hope I haven't left anything out Dan
Now...
We did this year's annual and changed the bottom plugs to NGK's with new harnesses provided by Brad.
OMG.
CHT's down by 30f.
EGT's stable and even.
My flying buddy races motorcycles and before raced big V8 stock cars. He and his Bro are wizards at auto tuning etc etc and the are interested.
Unfortunately, we changed two parameters at once, so I can't say it was the plugs, the leads, or both.
What we do know is that we are most happy with the new set up and if we get any plug fouling it will be..... Oh Really.... O'Reilly's - 8 NGK's please !
Much better than Autozone - super nice chaps at O'Reilly's, especially on OBT in Orlando.
I have no idea why just changing the Unison plugs and leads made a difference, but it did.
I will stand back and listen to the input from the great and the good.
We completed our RV7 - 3 years ago, dual P-Mags, very happy with the service and performance, however.......
CHT's were high from the get go.
We have an ECI IO-360 180hp parallel valve motor made with care, love and attention by Mattituck - Thank you Mahlon.....
Running NGK BR9EIX on top and Unison UREM40E on the bottom, both harnesses made up and tested by me.
CHT's were in the 400's on climb and when stunting.
In the cruise, lean of peak, they would drop to 370f.
Did a LOP balance check in accordance with Mahlon's instructions.
Also, big split on EGT's when taxiing. 1 & 3, lower than 2 & 4 by a good margin.
It has a plenum which is well sealed, we have a little ventilation down the back as per recent threads.
That is the background - hope I haven't left anything out Dan
Now...
We did this year's annual and changed the bottom plugs to NGK's with new harnesses provided by Brad.
OMG.
CHT's down by 30f.
EGT's stable and even.
My flying buddy races motorcycles and before raced big V8 stock cars. He and his Bro are wizards at auto tuning etc etc and the are interested.
Unfortunately, we changed two parameters at once, so I can't say it was the plugs, the leads, or both.
What we do know is that we are most happy with the new set up and if we get any plug fouling it will be..... Oh Really.... O'Reilly's - 8 NGK's please !
Much better than Autozone - super nice chaps at O'Reilly's, especially on OBT in Orlando.
I have no idea why just changing the Unison plugs and leads made a difference, but it did.
I will stand back and listen to the input from the great and the good.