smcnu*tt
SPONSOR
Indianapolis, IN
- Jun 4, 2019
- #1
Just wondering if anyone has information about installing a 0-320-E2D on a PA-22?
We're looking at replacing our engine and a friend had one of these. Don't know much except I think these have the Dynafocal mount so it's certainly not a drop-in. Can't find any information on a STC or anything.
Thought it was worth asking around.
Steve Pierce
Administrator
Staff member
Graham, Texas, United States
- Jun 4, 2019
- #2
It is a dynafocal mount and the carburetor is offset to one side. Here are some differences in different O-320s as noted in the TCDS:
| O-320 Models | Characteristics |
| O-320 | Basic model - four cylinder, horizontally opposed air cooled, direct drive with automotive type generator and starter, provides for single acting controllable pitch propeller. |
| O-320-A1A | Same as O-320, model designation change only. |
| O-320-B1A | Same as O-320-A1A except for compression ratio, fuel grade and rating. |
| O-320-A1B, -B1B | Same as O-320-A1A and -B1A respectively except have straight bore carburetor riser. |
| O-320-A2A, -A2B, and -B2A, -B2B | Same as O-320-A1A, -A1B, -B1A and B1B respectively except have no provisions for controllable pitch propellers. |
| O-320-A2D | Same as O-320-E3D except crankcase machined for conical instead of Dynafocal mounts. |
| O-320-A3A, -A3B, -B3A, and -B3B | Same as O-320-A1A, -A1B, -B1A, and -B1B respectively except have provisions for 7/16" propeller attaching bolts. |
| O-320-A2C, -A3C | Same as O-320-A2B and -A3B respectively, except for magnetos. |
| O-320-B2C, -B3C | Same as O-320-B2B and -B3B respectively, except for magnetos. |
| O-320-B2D | Same as O-320-D1D except conical engine mounts and no prop governor |
| O-320-B2E | Similar to –B2B except carburetor located same as O-320-D models |
| O-320-C2A, -C2B, -C3A, -C3B | Same as O-320-B2A, -B2B, -B3A and B3B respectively, except have O-320-A series, low compression pistons, reduced ratings and lower grade fuel requirements. |
| O-320-C1A, -C1B, -C2C, -C3C | Same as O-320-B1A, -B1B, -B2C, -B3C respectively, except have been converted to low compression pistons. |
| O-320-D1A | Same as O-320-B3B except has provisions for dynafocal mounts. |
| O-320-D1B, -D2B | Same as O-320-D1A and -D2A receptively, except for magnetos. |
| O-320-D1C | Identical to O-320-D2C except has provision for controllable pitch propellers. |
| O-320-D1D | Similar to O-320-D1A except incorporates Slick instead of Bendix magnetos and has a horizontal carburetor and induction housing |
| O-320-D1F | Identical to O-320-E1F except is equipped with high compression pistons and has higher H.P. rating. |
| O-320-D2A | Same as O-320-D1A except has no provisions for controllable pitch propellers |
| O-320-D2C | Similar to model O-320-D2A except for magnetos. |
| O-320-D2F | Similar to O-320-D1F but does not have provisions for controllable pitch propeller. |
| O-320-D2G | Identical to O-320-D2A except incorporates Slick instead of Bendix magnetos and 7/16 instead of 3/8 prop. flange bolts. |
| O-320-D2H | Same as D2G except has O-320-B sump and intake pipes and provision for AC type fuel pump. |
| O-320-D2J | Similar to O-320-D2G except is equipped with two Slick impulse coupling magnetos and the prop. governor pad, fuel pump and governor pads on accessory housing are not machined. |
| O-320-D3G | Same as D2G except has 3/8 in prop. attaching bolts. |
| O-320-E1A, -E2A | Same as O-320-D1A and -D2A respectively, except have lower compression ratio and performance. |
| O-320-E1B, -E2B | Same as O-320-E1A and -E2A respectively except for magnetos. |
| O-320-E1C, -E2C | Same as O-320-E1A and -E2A respectively except have 1200 series magnetos. |
| O-320-E1F | Similar to O-320-E1C except has propeller governor drive located on left front of crankcase instead of on the accessory housing. |
| O-320-E1J | Same as O-320-E1F except is equipped with Slick magnetos. |
| O-320-E2D | Similar to O-320-E2A except has no provisions for controllable pitch propeller. |
| O-320-E2F | Identical to O-320-E1F including provisions for propeller governing but does not contain propeller governor drive gears. |
| O-320-E2G | Similar to O-320-E2D except is equipped with O-320-A series sump and intake pipes. |
| O-320-E2H | Identical to O-320-E2D except incorporates Bendix instead of Slick magnetos. |
| O-320-E3D | Identical to O-320-E2D except has provisions for .375 in. propeller flange bolts instead of .4375 in. flange bolts. |
| O-320-E3H | Identical to O-320-E2H except has .375 in. propeller flange bushings instead of .4375 in. flange bushings. |
Jim
MEMBER
Fennville, MI
- Jun 4, 2019
- #3
Oops. I just re-read you question and noticed you're inquiring about using on a PA-22, mine is a 22/20.
Hi,
I took out an O290 and replaced it with a dynafocal mounted E2D. There isn't an STC for this switch, as far as I know anyway. I did a field approval using the Univair dynafocal 0360 STC engine mount along with the WagAero 0320 upgrade STC. There were many small to larger changes to things that needed to happen. I kept the chin mounted oil cooler, stock exhaust, and my original generator. I had to replace or alter everything involved with the carb being three inches further forward. New baffling too.
There are a few pictures at
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J
Jeff J
Non-Member
Eufaula, OK
- Jun 5, 2019
- #4
If I chased the model history correctly, the E2D will use 7/16 prop bolts in addition to the differences already mentioned.
smcnu*tt
SPONSOR
Indianapolis, IN
- Jun 5, 2019
- #5
Mine is actually a PA-22/20 but from an FAA standpoint I figured calling it a PA-22 was cleaner. How did you pull off a field approval on something as big as an engine? I was under the impression that most FSDO's run away from approving anything these days. Seems like a lot of work and STC's to get there not even counting the FAA hurdles.
Now that we've seen the data plate it's actually a E2A but not sure that changes much here. One lesson learned, when you are talking to someone about what engine they 'think' they have, wait until you actually see the data tag.
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cozzmo81
Non-Member
New Castle, IN
- Jun 5, 2019
- #6
I would think that unless you can get a really good deal on the engine you would be better off going with something that has an STC already approved for it. That being said I have not had a field approval rejected yet by the Indy FSDO. I have not done an engine on a field approval, but the inspectors I have dealt with have been reasonable. I think their main rub on engine field approvals is when you are trying to increase horsepower over what was factory.
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Jim
MEMBER
Fennville, MI
- Jun 6, 2019
- #7
Realizing the FAA already knows everything, I didn't go into details of the 941 innocent modifications it took to accomplish the install. By the way, I did not purchase the Univair STC, referenced only. Damn fine mount it is too, extra beefy!
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