Re: re:AMC modifying

[farna@xxxxxxx]

On August 22, 2005 andrew hay wrote:

> " but ROCHESTER injection? The 57
> " got BENDIX electronic fuel injection, not Rochester Mechanical!!
> 
> oops.  i should've known...  it was a late-'50s poncho that got the
> rochester - if i'm not wrong there too...
> 
> at least i remembered they had injection!

Yep, I knew a guy back home that had a 1957 Pontiac Star Chief (I think that's what it was) convertible with Rochester FI. He didn't drive it in the winter even in SC! The reason was the FI didn't work well below 50 degrees. It didn't work well when it got in the high 90s and the engine started running a bit warm either. He was asked a lot about running it in parades, but wouldn't run it for 4th of July! All the idling got it to warm and it would run rich.

> it's rather ironic that they didn't stick with it, because that system
> did indirectly kick off the modern age of efi - when bosch bought the
> patents from bendix and developed a successful version, introduced on
> the '66 vw squareback 1600.  my aunt had one, for about ten years
> iirc.  one of the last saabs my parents bought, a '71 99, had it too;
> the other, a virtual twin but with carbs graphically illustrated the
> difference.  the injected car ran better, was more responsive, had
> more power, got better mileage, and took cheaper gas without pinging.
> 
> it was a critical period in transistor development though, and bosch
> undoubtedly benefited from that.

Bosch didn't do everything right either. A friend had a later model VW Type 4 411/412 models (after the squareback, and never popular even in Germany) . It came with Bosch EFI starting in 71, and his was a 71 or 72. It monitored so much and adjusted so often that it wore adjusters out in a year or two of driving! I seem to recall that it had 17 sensors or something like that (more than 12). Modern systems have 5-6 sensors. Bosch scaled back and everything was fine. My buddy took the EFI off and replaced it with a two stage Holley 2V carb and auto crossed it. This had the Porsche 914 type pancake engine. Only difference between 411/412 and 914 four cylinder engines was the cam and the 914 used a three compression ring piston (four rings total instead of three). 

Except for EFI development this has nothing to do with AMC, so if you have a reply you might want to send it to me in e-mail! 

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