nigelspeedy
Well Known Member
G'day Everyone,
For the last few years I have been lurking around and reading the plethora of great threads as I build my RV-8. Well I finally have something neat to share. Last weekend I picked up my new motor. It started out as a Superior IO-360 kit that I had Lycon assemble for me. It came with dual P-mags, cold air induction and fuel injection. Lycon added 10:1 pistons, port and polished the heads, 380 CID stroker crankshaft, o-ring case seal, a lightened flywheel and a slightly re-profiled camshaft. The stroke was lengthened by 0.200" so by my math it is actually 377.5 CID but 380 is easier to say fast. There was a bit of a wait for pistons as they needed to have the ring location changed from the standard location. Anyway I am happy to have it and it worked out to be within $1,000 of a stock Lycoming from Vans. Lycon did the initial break in and a dyno run and the net result was 236 hp and 454 ft.lbs at 2700 rpm corrected to standard sea level conditions. So it should get up and go just fine. I fly helicopters in my day job so anything faster than 90 knots and higher than 500 feet is going to seem blisteringly fast to me. Hopefully attached below are a goofy photo of me and the motor and a graph showing a time history of the dyno run. The engine was run up to 2700 rpm at full rich then leaned 100F for the last part. Not sure how 100F lean of full rich is compared to peak but it made an extra 10hp in doing so.
http://i1272.photobucket.com/albums...0-3d1d-4bd6-838c-304ea0d05c34_zps8aac6a74.jpg
http://i1272.photobucket.com/albums...8-252f-4ea5-8628-932ae30d0dbf_zps1f5604a1.jpg
I'd like to think I will get it flying by the end of the year.
Cheers
Nigel
For the last few years I have been lurking around and reading the plethora of great threads as I build my RV-8. Well I finally have something neat to share. Last weekend I picked up my new motor. It started out as a Superior IO-360 kit that I had Lycon assemble for me. It came with dual P-mags, cold air induction and fuel injection. Lycon added 10:1 pistons, port and polished the heads, 380 CID stroker crankshaft, o-ring case seal, a lightened flywheel and a slightly re-profiled camshaft. The stroke was lengthened by 0.200" so by my math it is actually 377.5 CID but 380 is easier to say fast. There was a bit of a wait for pistons as they needed to have the ring location changed from the standard location. Anyway I am happy to have it and it worked out to be within $1,000 of a stock Lycoming from Vans. Lycon did the initial break in and a dyno run and the net result was 236 hp and 454 ft.lbs at 2700 rpm corrected to standard sea level conditions. So it should get up and go just fine. I fly helicopters in my day job so anything faster than 90 knots and higher than 500 feet is going to seem blisteringly fast to me. Hopefully attached below are a goofy photo of me and the motor and a graph showing a time history of the dyno run. The engine was run up to 2700 rpm at full rich then leaned 100F for the last part. Not sure how 100F lean of full rich is compared to peak but it made an extra 10hp in doing so.
http://i1272.photobucket.com/albums...0-3d1d-4bd6-838c-304ea0d05c34_zps8aac6a74.jpg
http://i1272.photobucket.com/albums...8-252f-4ea5-8628-932ae30d0dbf_zps1f5604a1.jpg
I'd like to think I will get it flying by the end of the year.
Cheers
Nigel