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Author Topic: 71 Lynx 303  (Read 1304 times)

unobtanium

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Re: 71 Lynx 303
« Reply #15 on: January 03, 2020, 06:00:51 pm »
Thanks unobtanium it dose sound sweet and has good throttle response,  this lynx is a blast , shifts out at 6400~ . if i was closer it would be real fun to run against your 70 puma, aluminum bulkhead and a 194r and all...steep competition
maybe a better matchup would be ur Lynx up against my panther......I'll meet you 1/2 way.....BraaaPPP!!!

Vintagesleds.com

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    Re: 71 Lynx 303
    « Reply #16 on: January 03, 2020, 08:17:44 pm »
    Very cool .  8)   You know back in the day ,1968 , the companies all thought and boasted  these engines would fly. The USSA even handi-capped the 303 Wankel's to run in the 340 classes.  The 606 Wankel was moved up to the 800 class , if my memory is correct.  Appears you have found the portal to that level of  performance .  Cheers to you  :)

    motorman45

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    Re: 71 Lynx 303
    « Reply #17 on: January 04, 2020, 02:51:07 pm »
    That is a sweet panther , i bet its a fun ride, my lynx would give it a run for its money  :)

     Thanks Zoom , That is cool to hear that back in the day they thought that about these small wankels . and they can put out some power. so far ive built 5 of these ported 303's and the Tilly HD's really make them sing....  two of them went to someone else. recently  8)


    Funny how these things multiply
    « Last Edit: January 04, 2020, 02:55:18 pm by motorman45 »
    72 Cheetah 440 sachs
    72 Cheetah 303 custom
    71 Puma 303 mod
    71 lynx 303 mod

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    Re: 71 Lynx 303
    « Reply #18 on: January 04, 2020, 03:22:21 pm »
    I remember seeing a Skiroule  Wankel  modified sled at the races in 1968-69 .  It was running a H.D. carb and was using a expansion chamber .  As I said before , it was running against 340's and didn't do well .   I have no idea whether a expansion chamber even worked correctly with the Wankel engine. Have you any knowledge of whether one would work or not ?

    motorman45

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    Re: 71 Lynx 303
    « Reply #19 on: January 04, 2020, 04:47:47 pm »
    I remember seeing a Skiroule  Wankel  modified sled at the races in 1968-69 .  It was running a H.D. carb and was using a expansion chamber .  As I said before , it was running against 340's and didn't do well .   I have no idea whether a expansion chamber even worked correctly with the Wankel engine. Have you any knowledge of whether one would work or not ?

     I researched extensively on exhausts for these and expansion chambers dont work, they can actually work against a wankel with the return wave pushing exhaust back into the next intake cycle at overlap or adding excessive back pressure to the exhaust phase.

      I messed with megaphones a lot with these to try and pull more charge in at overlap like a 4 stroke and found the best power from a straight cut header or very shallow angle short meg that empties into a can like the stock setup but just a little longer header than stock depending on the porting.

     the HD carb only really seems to work along side some serious porting from my experience at least. my latest porting job ( not this lynx) easily pulls 7200 rpm with my but on the sled and fully shifted out.  on the stand it will go past 8k but i havent run it much up there. this lynx runs near 6500 + but its clutched to be more fun than top end. i will post something on the latest porting mods when i get it dialed in


    72 Cheetah 440 sachs
    72 Cheetah 303 custom
    71 Puma 303 mod
    71 lynx 303 mod

    skyguynca

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    Re: 71 Lynx 303
    « Reply #20 on: April 02, 2020, 06:24:03 pm »
    Motorman45, I wish my 303's would multiply. I have one that ran when I bought it, but found out during teardown that it had holes in the chamber liner that were filled with JB weld. I am always looking for good cores to experiment with porting and fuel injection. Never can find any, most are locked up or ruined....can you steer me in a direction to find some please?

    David
    San Jose, CA

    motorman45

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    Re: 71 Lynx 303
    « Reply #21 on: April 02, 2020, 11:09:15 pm »
    Motorman45, I wish my 303's would multiply. I have one that ran when I bought it, but found out during teardown that it had holes in the chamber liner that were filled with JB weld. I am always looking for good cores to experiment with porting and fuel injection. Never can find any, most are locked up or ruined....can you steer me in a direction to find some please?

    David
    San Jose, CA

     I wish i could help you find more of these, they are fun motors. cat did put about 30,000  303's in sleds so they are out there. i just watched craigslist for people selling old 303 panthers or just the motors and also from posting on here connected with other interested users that has some. even traded porting work for motors this year.  im still messing with even more porting, carb ,clutching and exhaust mods that i have not posted about. no snow though now, may have to test on my back field on the grass after mud season
     keep looking and i bet youll find some more. ,may take a few motors get get all the parts for one decent one.

     here is a pic of something im testing now. a boost port / side port in addition to the already opened up main ports , interesting results so far.
    72 Cheetah 440 sachs
    72 Cheetah 303 custom
    71 Puma 303 mod
    71 lynx 303 mod

    motorman45

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    Re: 71 Lynx 303
    « Reply #22 on: April 02, 2020, 11:25:09 pm »
    of course you location makes it a little harder to find old sleds near by
    72 Cheetah 440 sachs
    72 Cheetah 303 custom
    71 Puma 303 mod
    71 lynx 303 mod

    theSLEDwhisperer

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    Re: 71 Lynx 303
    « Reply #23 on: April 03, 2020, 12:19:00 am »
    I have a 72 Panther with 125 original miles. I would love for someone to take it off my hands, for what I have into it but I probably overpaid for it.  :'(
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    chris r

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    Re: 71 Lynx 303
    « Reply #24 on: April 03, 2020, 11:40:30 am »
    Really cool to see the rotary engines you have.

    On the old Harley engine cases, it is free horse power by maximizing the breather porting. Basically when one window passes the other, I make the opening in the case as large as possible, yet not over lap the edges of the breather window.
    If you can't look back on your younger self and realize you were an idiot, you're probably still an idiot.

    motorman45

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    Re: 71 Lynx 303
    « Reply #25 on: April 03, 2020, 08:11:48 pm »
    Really cool to see the rotary engines you have.

     Glad there is some love for these odd old engines , interesting about the harly mod, love hearing about stuff like that.

    heres one more on the "side port" mod when i was working out the timing and where to cut, it opens after the ex is closed and closes before the main peripheral intake dose. its added midrange but not gotten the top end i thought i would, . i think im limited at this point by the fixed timing of these.
    « Last Edit: April 04, 2020, 12:11:56 am by motorman45 »
    72 Cheetah 440 sachs
    72 Cheetah 303 custom
    71 Puma 303 mod
    71 lynx 303 mod

    chris r

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    Re: 71 Lynx 303
    « Reply #26 on: April 04, 2020, 11:06:23 am »
    Love the Sharpies. I use them all the time in my shop.

    If you can't look back on your younger self and realize you were an idiot, you're probably still an idiot.

    69MarkIII

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    Re: 71 Lynx 303
    « Reply #27 on: July 29, 2020, 10:32:25 pm »
    Awesome stuff! I love reading about Wankel enthusiasts. When I started out in this hobby, nobody would touch one with a 30 foot pole, mostly from lack of understanding on how they ran and how to tune them. I've owned a few since then ('68 Wankel Polaris Colt and Mustang, '69 Wankel Polaris Colt and Mustang, '68 Wankel Skiroule,Wankel Panther, Wankel Lynx) and they're a lot of fun to ride. My favorite was a '74 Lynx II with the KM-24 295 rotary. She'd really get up and go!
    1958 Beeline Sapphire 16' speed boat.
    1960 Studebaker Lark Regal wagon.
    1967 Ski-Doo Olympique.
    1968 Alouette GT "Snoopy".
    1969 Alouette GT "Flash".
    1969 Skiroule S-370.
    1969 Sno-Jet.
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    motorman45

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    Re: 71 Lynx 303
    « Reply #28 on: July 30, 2020, 09:44:48 pm »
    Thanks Mark, you has some really cool and rare wankels , ive only heard of the polaris and skiroule wankels but never seen one. i almost got a 74 lynx 295 as i heard they were really fun little sleds but i only have room for a few sleds and hate to leave anything outside all the time.
     I found another 71 lynx chassis and im thinking of building another 303 mod with it after i sell another sled and make room.  as you can tell i really love these 303 sachs motors.
    72 Cheetah 440 sachs
    72 Cheetah 303 custom
    71 Puma 303 mod
    71 lynx 303 mod