ls6pilot Posted January 17, 2020 Report Share Posted January 17, 2020 Wondering if anyone has any info on the big bore conversions. Just noticed that Lockwood is using them on their Aircams. Thanks Quote Link to comment Share on other sites More sharing options...
Garrett Gee Posted January 17, 2020 Report Share Posted January 17, 2020 I too have been curious about a big bore kit. I have seen two or three different kits out there for the Rotax. Which one are they using? I have looked at zipper big bore, and it seems to have good reviews. Quote Link to comment Share on other sites More sharing options...
Warmi Posted January 18, 2020 Report Share Posted January 18, 2020 http://badasspowersports.com Probably the most mature and best option for a big bore kit. Their kit seem to be even semi-endorsed by certain LSA manufacturers... https://czechsportaircraft.com/czech-sport-aircraft-and-oshkosh-2019-partnered-for-success/ Quote Link to comment Share on other sites More sharing options...
DocRon Posted January 21, 2020 Report Share Posted January 21, 2020 I put the big bore kit in my 2014 CTLSi about a year ago. I had it installed by Ronnie Smith at Mississippi Light Sport Aircraft who has been refining his kits for many years. I've had no issues with the installation or performance. I was told that Rotax requested two sets of Ronnie's kits to evaluate. The power difference is considerable. Ronnie thinks I get about an additional 15-18 horsepower. It delivers what I need most: shorter take-off and better climb power. I did not notice any airspeed increases. However, my rate of climb at gross weight has increased from about 450fpm to about 800-1000fpm. This is taking off from my airpark at 3370msl for the first 3000 feet above the ground and an initial density altitude of about 5000 feet. Just after the kit was installed I did have to re-pitch the propeller. Here in northern Arizona we fly in the summer at density altitudes of 9000 feet or higher. Take-off and initial climb is much more relaxing now. At a 9000msl density altitude I still break ground at 900-1000 feet and climb at about 450fpm. Cruise is still as before, about 4.1gph at 108 knots. Personally I'm quite very happy I bought the kit. Quote Link to comment Share on other sites More sharing options...
ls6pilot Posted January 21, 2020 Author Report Share Posted January 21, 2020 Mississippi light sport is doing the big bore conversions for lockwood Quote Link to comment Share on other sites More sharing options...
Garrett Gee Posted January 22, 2020 Report Share Posted January 22, 2020 7 hours ago, DocRon said: I put the big bore kit in my 2014 CTLSi about a year ago. I had it installed by Ronnie Smith at Mississippi Light Sport Aircraft who has been refining his kits for many years. I've had no issues with the installation or performance. I was told that Rotax requested two sets of Ronnie's kits to evaluate. The power difference is considerable. Ronnie thinks I get about an additional 15-18 horsepower. It delivers what I need most: shorter take-off and better climb power. I did not notice any airspeed increases. However, my rate of climb at gross weight has increased from about 450fpm to about 800-1000fpm. This is taking off from my airpark at 3370msl for the first 3000 feet above the ground and an initial density altitude of about 5000 feet. Just after the kit was installed I did have to re-pitch the propeller. Here in northern Arizona we fly in the summer at density altitudes of 9000 feet or higher. Take-off and initial climb is much more relaxing now. At a 9000msl density altitude I still break ground at 900-1000 feet and climb at about 450fpm. Cruise is still as before, about 4.1gph at 108 knots. Personally I'm quite very happy I bought the kit. Good to know. He is a little over an hour’s flight from me. Quote Link to comment Share on other sites More sharing options...
FlyingMonkey Posted January 22, 2020 Report Share Posted January 22, 2020 18 hours ago, DocRon said: I put the big bore kit in my 2014 CTLSi about a year ago. I had it installed by Ronnie Smith at Mississippi Light Sport Aircraft who has been refining his kits for many years. I've had no issues with the installation or performance. I was told that Rotax requested two sets of Ronnie's kits to evaluate. The power difference is considerable. Ronnie thinks I get about an additional 15-18 horsepower. It delivers what I need most: shorter take-off and better climb power. I did not notice any airspeed increases. However, my rate of climb at gross weight has increased from about 450fpm to about 800-1000fpm. This is taking off from my airpark at 3370msl for the first 3000 feet above the ground and an initial density altitude of about 5000 feet. Just after the kit was installed I did have to re-pitch the propeller. Here in northern Arizona we fly in the summer at density altitudes of 9000 feet or higher. Take-off and initial climb is much more relaxing now. At a 9000msl density altitude I still break ground at 900-1000 feet and climb at about 450fpm. Cruise is still as before, about 4.1gph at 108 knots. Personally I'm quite very happy I bought the kit. DocRon...I don't want to pry, but would you be willing to share your installed cost? I would consider this upgrade, depending on the price. Zipper Bigbore will do a 1464cc big bore kit installed for $5100, but it's way out in Elko, Nevada. I assume the Mississippi kit is a 1464cc upgrade, which seems to be standard and about as big as you can go without machining the case. Living in Georgia, Mississippi is a pretty short hop to have that work done. Quote Link to comment Share on other sites More sharing options...
ls6pilot Posted January 22, 2020 Author Report Share Posted January 22, 2020 Ronnie will install for $5500. flysmla@flysmla.com. Rich Quote Link to comment Share on other sites More sharing options...
DocRon Posted January 22, 2020 Report Share Posted January 22, 2020 He may have gone up on these. He did mine for $4000 plus $1000 since I said I wanted to keep the replaced cylinders. I watched him install the new cylinders; it took about three hours. He had someone helping him. Quote Link to comment Share on other sites More sharing options...
FlyingMonkey Posted January 22, 2020 Report Share Posted January 22, 2020 3 hours ago, DocRon said: He may have gone up on these. He did mine for $4000 plus $1000 since I said I wanted to keep the replaced cylinders. I watched him install the new cylinders; it took about three hours. He had someone helping him. Thanks...pricing sounds in line with what I've seen elsewhere. Quote Link to comment Share on other sites More sharing options...
Allen B Posted October 5, 2022 Report Share Posted October 5, 2022 Hi to anyone who has information about the Zipper Big Bore Kit for the 912S Rotax engine. I am interested in increasing the HP of my 912S but when I tap on the Zipper website a message pops up saying "There has been a critical error on this website". I am wondering if this means Zipper no longer sell/support this Kit for the Rotax 912S ??. Can anyone shed any light on this please ?. Thanks in advance. Regards, Allen B. Quote Link to comment Share on other sites More sharing options...
Warmi Posted October 5, 2022 Report Share Posted October 5, 2022 I would go with Edge Performance https://stolcreek.com/bigborekits or https://www.edgeperformance.no They have sold many more kits all over the world and thus offer greater real-word reliability to the point that some LSA manufacturers in Europe advertise optional installations with stock Rotax engines. Quote Link to comment Share on other sites More sharing options...
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