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03-08-2011, 01:00 AM
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Join Date: Jan 2005
Posts: 210
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Last week, I installed a set of AFP nozzles with .025 restrictors to replace the previous .028 Precision Airmotive nozzles on my RV-4. At 21"/2400RPM to the GAMI spread went from ~0.7 GPH to ~0.1 GPH. I couldn't be happier. It's a shame that, after all these years, Precision hasn't learned the value of having matched air-fuel ratios across all cylinders.
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Kevin Cameron - Fresno, CA - E79
N493DB RV4 Flying IO-360-A1B, 10:1, Straight-Bore cylinders, Gapless Piston Rings, Hartzell CS Prop,
AFS3400-EE, TruTrac DFII VS, Aera 660, GTX 335, GDL 52R,
XM Radio, SL30, SL40, PMA9000EX, MicroTrac 300 APRS
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03-08-2011, 05:01 AM
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Join Date: Jan 2005
Location: Louisville, Ga
Posts: 7,840
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It's so much easier to visit Don...
...if you're anywhere east of the Mississippi.
He flew with me and we tuned her in only two flights.
I have come to the conclusion that "Experimental" has raised the bar for the certified crowd to catch up to!
Best,
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Pierre Smith
RV-10, 510 TT
RV6A (Sojourner) 180 HP, Catto 3 Bl (502Hrs), gone...and already missed
Air Tractor AT 502B PT 6-15 Sold
Air Tractor 402 PT-6-20 Sold
EAA Flight Advisor/CFI/Tech Counselor
Louisville, Ga
It's never skill or craftsmanship that completes airplanes, it's the will to do so,
Patrick Kenny, EAA 275132
Dues gladly paid!
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03-08-2011, 09:46 AM
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Join Date: Dec 2008
Location: Big Sandy, WY
Posts: 2,567
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Quote:
I have come to the conclusion that "Experimental" has raised the bar for the certified crowd to catch up to!
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About time.
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Actual repeat offender.
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03-10-2011, 10:59 AM
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Join Date: Jan 2006
Location: Belgium
Posts: 645
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East of the mississippi! yeah......
Quote:
Originally Posted by pierre smith
...if you're anywhere east of the Mississippi.
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Piere sure, east of the Mississippi,......... about 4.500 miles east!
So no, I am not going to visit Don with my plane. But I am in touch with him and he is sending me 4 new restrictors. When I receive them, I will do the test again. Maybe I will have to change out a few restrictor after that test. I am confident that I am now talking to the right guy.
Don, again, thanks in advance for the help.
Kind regards, Tonny.
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"Pilottonny"
Tonny Tromp
Lanaken, Belgium (EU)
RV9A, Registration: PH-VAN
ECI-Titan IOX-320 with dual EI, turning a Whirlwind 200RV CS prop.
Sold
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03-14-2011, 05:20 AM
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Join Date: May 2008
Location: Brisbane Qld. Aust.
Posts: 2,271
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Can I suggest you look up the AVWEB articles written by JohnDeakin ...around article 64 or there abouts are 4 articles on how to run your engine.
PRINT THEM OUT
READ THEM
..............and read them every night before bed for about 3 weeks..........YES I AM SERIOUS
Then when you understand the whole combustion process and how to run your engine...........you will be   
I assume these are nice looking valves! .......... only 330hrs since new
And the pistons are the cleanest I have seen on any engine after 330 hours too.
Exhaust valves
1.
2.
3.
4.
5.
6.

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03-14-2011, 06:12 AM
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Join Date: Feb 2011
Location: USA
Posts: 3,179
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What about us Carburator pilots?
Assuming we have sensors for all four cylinders, are there any options for balancing carburated engines ? (appologies if this is an ignorant question).
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