Supercharger AMR500

Discussion in 'Discussion Forum' started by Hybridfiat, Jan 15, 2020.

  1. Hybridfiat

    Hybridfiat Power costs money, more p

    Location:
    Australia
    Has anyone here fitted or researched the fitting of one of these/similar superchargers to the stock engine?
    I'm just planning ahead here as the respray on my stock car is first. But I'd like to tickle the power just a tad.
    Ive seen throttle bodies for fuel injection on FleaBay but that would mean an engine management system albeit simple. Also there are Carbs for forced induction around.

    Any thoughts?
     
    Last edited: Jan 16, 2020
  2. kmead

    kmead Old enough to know better

    Location:
    Michigan
    Not an option I have seen but it is a one I like. If it was set up to come on early and then tapered off it would be a nice match to the engine by adding some torque low and preserving the high end with a little kick.
     
  3. Bobkat

    Bobkat 1979 x1/9

    Location:
    Calgary Alberta
    The fit these to bugs and old Goldwings. They are very loud and not in a good way. There is one size larger that is common in Japan that may be better.
     
  4. Dr.Jeff

    Dr.Jeff True Classic

    Location:
    Sin City
    The AMR500 will be a bit small capacity for a 1300/1500 engine. They are designed for much smaller power plants.

    Here is one installed on a Fiat 850. Although I think a 850 is pushing the limits of this blower, it seems to work on this engine. But I recall he also converting to fuel injection with a programmable aftermarket ECU in order to keep it alive:
    https://xwebforums.com/forum/index.php?threads/850-sport-coupe-series-2-track-car.28768/
     
  5. Hybridfiat

    Hybridfiat Power costs money, more p

    Location:
    Australia
    Interesting. That is sucking the fuel/air mix and then compressing it. I didn't know that could be done. Solves a problem for me in a sense. No need to worry about leaks in the carbie when pressurised. The carbie is doing what it is designed to do, mix fuel and air in a low pressure environment.
     
  6. carl

    carl True Classic

    Location:
    Virginia
    There were a few Fiat 124 twin cams that came with a supercharger with a carb, I believe there was a 131/Brava that had a Weber 34ADF bolted to the supercharger and thus the air/fuel mixture was being sucked into the motor.
     
  7. Dr.Jeff

    Dr.Jeff True Classic

    Location:
    Sin City
    If you use a carb with boost, then it usually works better to "suck" through the carb rather than "blow" through it. In other words, sucking is better than blowing...sorry, I couldn't resist a cheap joke. As you said, carbs are designed to work best with negative pressure. Plus there tends to be issues with float bowl pressure and fuel levels, boost leaks at carb body mating surfaces and throttle shafts, etc., when blowing through them.

    However with any boosted setup (supercharger or turbo) the air-fuel ratio is critical under all conditions. The added charge makes the engine very susceptible to detonation (the explanation gets into a lot of detailed tech talk). And carbs are limited in their AFR precision/efficiency compared to EFI, so they tend to lead to failures. Many variables at play here, therefore a blanket statement like that cannot be true in every case. Drag cars have used carbs on blowers for decades. But that is a completely different scenario than a street driven passenger car.

    Between this blower being undersized and using a carb to feed it, I think you may very well be in for a disappointment unfortunately. Major performance enhancements rarely come cheap.
     
  8. Bobkat

    Bobkat 1979 x1/9

    Location:
    Calgary Alberta
    This small Eaton may be a better solution. Eaton ETN TVS R410. Still small in size but good for up to 1600 cc
     
  9. Back in the 60s, I had a friend who bought a Studebaker Lark (66?) with an Eaton supercharger. It was actually a factory option. It was a real sleeper!
     
  10. Hybridfiat

    Hybridfiat Power costs money, more p

    Location:
    Australia
    Of course if I blow the motor I'd have to fit another Starlet GT motor and gearbox. I just happen to have a spare.:rolleyes:
    Had a look online for an Eaton ETN. Looks more practical than a AMR500. I'll get the car painted and see if it is sellable as is. If not, a bolt-on may have to do.
    Thanks for the advice.
     
  11. gene cooley

    gene cooley Autocrosser

    Location:
    Henrico, Va
    Probably best to change the "if I blow the motor" to "when".
    Not sure if they are related to Eaton, but Studebaker and Avanti also used Paxton superchargers.
     
    dllubin likes this.
  12. It may have been a Paxton on second thought.
     

Share This Page

  1. This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register.
    By continuing to use this site, you are consenting to our use of cookies.
    Dismiss Notice