RE: [Chrysler300] 300 D Fuel injection summary

Hi Bob,

You can get it to work as well as it did then, which was unacceptably bad, terrible even. ..reread the tech stuff, as to why . Design and pieces were poor, but terrific attempt for the time, correct ideas. . Problems like hydraulic lock in the motor (leaking injectors fill the cylinders--sometimes) , fires, washed out ring seals, stalling , cylinders rich and lean, gas in oil, etc etc Mechanical contacts that rubbed (!) at 12V picked the cylinder to squirt. (second distributor ) Remember it was an open loop system , no O2 sensor…nothing like today’s FI. Had no idea in its control , of the AF ratio it was getting (today, as opposed to yesterday, or at dealer ) . I believe that one Desoto has a later FI brain behind it—although not 100% sure of that. . I am an EE too, can tell you that the design, as it was then , will not work more than 1000 miles or a few weeks. If it works well enough to move 1000 feet at all. Same decision Chrysler came to…correctly . One can baby anything, like a crystal set ‘works” , too ….but none survived.

GM vacuum /mechanical Rochester FI was a continuous flow system, as opposed to timed port injection on the Chrysler, way easier, no electrics really. It worked. I had a 60 vette with it, long ago. Also had 70’s Mercedes Jetronic, it was a dog, although some had good luck with it (450/500SL) .Cheap computers , self learning concept to tune it, and large memory maps, --and O2 sensor makes it work well today , along with the really good electric injectors now, after 55 years of development. .

I believe that fellow was Tom White, lives not far from me, in Mass, but I never met him. I hope to one day….

John Grady

From: scooter465@xxxxxxx [mailto:scooter465@xxxxxxx]
Sent: Tuesday, April 16, 2019 2:22 PM
To: John Grady
Cc: mjraguse@xxxxxxx; Chrysler300@xxxxxxxxxxxxxxx; Jim Bartuska
Subject: Re: [Chrysler300] 300 D Fuel injection summary

It can be done a guy with a 58 DeSoto adventure did it.

I think he was a electrical engineer.

Made up grades to capacitors etc.

Can’t remember his name I think it was White. Saw car at Hersey years ago.

Bob Haag

Sent from my iPhone

On Apr 16, 2019, at 1:24 PM, 'John Grady' jkg@xxxxxxxxxxxxxxxxx [Chrysler300] <Chrysler300-noreply@xxxxxxxxxxxxxxx> wrote:

Hi Marv,

I believe FI data is on Master Bob M’s terrific club site, on tech pages?

Thank you to all who helped me gather all that data for the FI report, especially Jim Bartuskas, and Alan and Gloria . Any tech questions about FI unit proper, just ask. Not viable to try to get one going, as originally made by Chrysler, read the site ,you will see quite severe inherent issues with the design.. Right track, but way way too early. ….. If you have one, a museum piece , really.

Thought about adding say FAST or ~ 2002 JEEP V8 system to the old Bendix throttle bodies, but a lot of work and not “real” …

Best regards,

John Grady

From: Chrysler300@xxxxxxxxxxxxxxx [mailto:Chrysler300@xxxxxxxxxxxxxxx] On Behalf Of mjraguse@xxxxxxx [Chrysler300]
Sent: Tuesday, April 16, 2019 9:43 AM
To: Chrysler300@xxxxxxxxxxxxxxx
Subject: [Chrysler300] 300 D Fuel injection summary

A few weeks ago a summary of FI volumes per Gil's information was discussed. I was traveling and wanted to revisit the numbers and comments etc. of the Bendix system. Now I can't find the email. Please help. Thanks
Marv