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Author Topic: 1990 arctic cat cougar 500 fan engine vs. 79 el tigre 500 free air  (Read 356 times)

HudCo

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what is the differace of them two engines ?    hp., pipes, carbs, reeds? bolt patterns , wieght 

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    Earl

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    Re: 1990 arctic cat cougar 500 fan engine vs. 79 el tigre 500 free air
    « Reply #1 on: July 19, 2020, 06:27:31 pm »
    To me  the fanner has to be heavier.  That's all I got.
    getting older by the minute            2001 Panther 2 up         2002 Z 570

    Brettm57

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    Re: 1990 arctic cat cougar 500 fan engine vs. 79 el tigre 500 free air
    « Reply #2 on: July 20, 2020, 10:16:37 am »
    They're about the same hp - 62 ish.  I've never closely compared the two pipes, but they look similar.  They're both piston ported, no reeds.  The free air came with 32mm carbs, I believe the Cougar came with 34mm carbs.  The fan cooled version is a little bit heavier, but not much.

    Porting is the same.  The Cougar uses the same flat style head gasket the older four port fan used rather than the copper recessed gasket of the free air.  The Cougar has a beefier crankshaft.  Cylinder-to-crankcase bolt patterns are the same. 

    I'm not sure how detailed you want to get, but those are the differences I can think of right off the top of my head.
    1971 634 Puma, 1972 340/440 Puma, 1977 Pantera, 1983 EL-JAGRE, 1980 Jag w/295 Wankel power, 1995 Polaris XCR 600, 1967 Rupp A-Bone/MC90, 1984 MXK Mirage/Briggs Flathead-alky fueled

    HudCo

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    Re: 1990 arctic cat cougar 500 fan engine vs. 79 el tigre 500 free air
    « Reply #3 on: July 20, 2020, 02:18:14 pm »
    iam looking at buying 90 cougar for running gear parts for the 76 pantera hillclimber project .   the 1990 is supossed to have new clutches and no spark

    Brettm57

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    Re: 1990 arctic cat cougar 500 fan engine vs. 79 el tigre 500 free air
    « Reply #4 on: July 20, 2020, 02:53:58 pm »
    You'll need to find a fan cooled Pantera to get the bell housing/fan shroud off of, but other than that it should be pretty much a bolt-in swap.  The Cougar has a starter ring gear on the flywheel and a bigger shroud to match, and it won't fit down into the Pantera motor plate.  The Cougar ring gear is soft enough to cut it with a hack saw and they'll snap just before you get it sawed in two.  Then the Pantera shroud will bolt right up.
    1971 634 Puma, 1972 340/440 Puma, 1977 Pantera, 1983 EL-JAGRE, 1980 Jag w/295 Wankel power, 1995 Polaris XCR 600, 1967 Rupp A-Bone/MC90, 1984 MXK Mirage/Briggs Flathead-alky fueled

    HudCo

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    Re: 1990 arctic cat cougar 500 fan engine vs. 79 el tigre 500 free air
    « Reply #5 on: July 21, 2020, 04:19:45 am »
    maybe  i should just use the clutches and suspension .    will the bigger carbs from the faner work on the free air any better? also how about swapping cranks into the f/a ?

    Brettm57

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    Re: 1990 arctic cat cougar 500 fan engine vs. 79 el tigre 500 free air
    « Reply #6 on: July 21, 2020, 11:17:57 am »
    The bigger carbs will probably make a bit of a difference.  I've put 38's on a 500 free air and it handled them OK.  I've been told the cranks will interchange, but I've never done it myself to know positively.

    Another possibility might be to cut down the shroud from the cougar to make it fit.  I've never tried it, but I think it could be done.  I don't think it would be too hard to find a junk 500 Pantera fan to get the fan shroud off of.  There's bunch of them out there.

    I'm thinking that a fan cooled engine would be a better choice for your project.  I'm just trying to think of ways to make it happen. ;) 
    1971 634 Puma, 1972 340/440 Puma, 1977 Pantera, 1983 EL-JAGRE, 1980 Jag w/295 Wankel power, 1995 Polaris XCR 600, 1967 Rupp A-Bone/MC90, 1984 MXK Mirage/Briggs Flathead-alky fueled