Van's Air Force
The definitive Van's Aircraft support community! Buying, building or flying an RV? Join our exclusive family of mentors and enthusiasts!
IO-540V4A5 ?
- Thread starter jabarr
- Start date
Check if case has boss for mounting compatible alternator. The stock one mounted on left side may have cowling clearance issues.
Variant with dual regular mags might be OK but if you are looking at one with the dually (2 in 1) mag, you may have mount clearance issues. Or this one could be perfect candidate for certain electronic ignition conversion.
Variant with dual regular mags might be OK but if you are looking at one with the dually (2 in 1) mag, you may have mount clearance issues. Or this one could be perfect candidate for certain electronic ignition conversion.
Ahh yes, everybody's favorite game: spot the difference between lycoming models.
SSP-110-2 is your first stop.
IO-540-V4A5 Same as –V4A5D except has two Slick Magnetos
IO-540-V4A5D Same as –T4B5D except for front mounted fuel injector
IO-540-T4B5D Identical to –T4A5D except for fuel drain boss location
IO-540-T4A5D Similar to –D4B5 but has D6LN-3000 impulse coupling dual Magneto and horizontal rear inlet fuel injector
IO-540-D4B5 Same as –D4A5 but has -1200 series impulse coupling Magnetos
So they took the D4A5 and switched to two 1200 bendix mags. Then to a single dual bendix mag and rear injection. Then moved the fuel drain boss location. Then turned the fuel injector around. And then switched back to two Slick mags like the D4A5 leaving just the forward intake and fuel drain boss location change.
Next stop is PC-615 Parts Catalog. Looks like you'll also need PC-615-3 (V-series). Then you can go through and cross reference all the changes between the D4A5 and the V4A5. You'll also need SSP-499 parts history to cross reference some parts.
Big thing to look for is the crank (should be compatible with the compact hartzell hub), the case, the mounting ears, the sump, and the accessory case. A quick look and the mounting ears may be different but you'll need to check the part number list to see if they cross reference. And the sump is different being a forward facing intake on the V4A5.
Hopefully someone can add to the viability of a front-facing intake. But if you have to change out the ears ($250/ea ebay; $800+/ea new) and the sump+servo it's going to add up quick.
SSP-110-2 is your first stop.
IO-540-V4A5 Same as –V4A5D except has two Slick Magnetos
IO-540-V4A5D Same as –T4B5D except for front mounted fuel injector
IO-540-T4B5D Identical to –T4A5D except for fuel drain boss location
IO-540-T4A5D Similar to –D4B5 but has D6LN-3000 impulse coupling dual Magneto and horizontal rear inlet fuel injector
IO-540-D4B5 Same as –D4A5 but has -1200 series impulse coupling Magnetos
So they took the D4A5 and switched to two 1200 bendix mags. Then to a single dual bendix mag and rear injection. Then moved the fuel drain boss location. Then turned the fuel injector around. And then switched back to two Slick mags like the D4A5 leaving just the forward intake and fuel drain boss location change.
Next stop is PC-615 Parts Catalog. Looks like you'll also need PC-615-3 (V-series). Then you can go through and cross reference all the changes between the D4A5 and the V4A5. You'll also need SSP-499 parts history to cross reference some parts.
Big thing to look for is the crank (should be compatible with the compact hartzell hub), the case, the mounting ears, the sump, and the accessory case. A quick look and the mounting ears may be different but you'll need to check the part number list to see if they cross reference. And the sump is different being a forward facing intake on the V4A5.
Hopefully someone can add to the viability of a front-facing intake. But if you have to change out the ears ($250/ea ebay; $800+/ea new) and the sump+servo it's going to add up quick.
Thats what I put in my RV-10 when I built it. Mine was a low hour enginge out of a Maule that had a mild prop strike. Got it from Wentworth. I had to change out the mount ears for the smaller hole model, then the fuel servo is a bitt offset from center. I was able to cobble together an air intake in line with the lower cowl snorkel, which I also made removable. Other than that, it was a good fit
