Fiat 850 sport coupe 903cc engine idle RPM

[ErnieD]

Hi, just trying to find out what the idle rpm should be on the 100GBC 903cc engine.

 

[Jeff Stich]

850-900rpm.

 

[ErnieD]

Thanks Jeff, much appreciate.

 

[fiatfactory]

850-900rpm.

Jeff, you can be more precise than that.... it's

843 - 903 rpm

SteveC

 

[Jeff Stich]

Jeff, you can be more precise than that.... it's 843 - 903 rpm

Here in the USA, that would be 817-903 rpm.

 

[ErnieD]

Jeff, you can be more precise than that.... it's

843 - 903 rpm

SteveC

Hi Steve,
I got a “123 Ignition Tune” distributor for my 69 850 sport coupe and have been
scouring the internet for an advance curve for my car to program into the dizzy.
The only stats I have found are the static advance of 10 degrees and the
centrifugal advance of 28 degrees.
I’d like to know what degrees at what revs and how many steps I should put in.
Hopefully you can point me in the right direction.
Cheers, Ernie

 

[dnudelman]

Hi Steve,
I got a “123 Ignition Tune” distributor for my 69 850 sport coupe and have been
scouring the internet for an advance curve for my car to program into the dizzy.
The only stats I have found are the static advance of 10 degrees and the
centrifugal advance of 28 degrees.
I’d like to know what degrees at what revs and how many steps I should put in.
Hopefully you can point me in the right direction.
Cheers, Ernie

Hi Ernie, good chance nobody knows, or cares. These motors are so small with limited hp so a tweak here or there with the disty curve isn't going to make much difference in a street car. If you can set it to a default curve, I would do so and move on to the next thing needing repair.

You might want to look at the static advance for a non USA car and rip out all they junk if you haven't already.

 

[Jeff Stich]

https://xwebforums.com/forum/index.php?threads/903cc-100gbc-distributor-advance-curve.43584/

 

[ErnieD]

Hi Ernie, good chance nobody knows, or cares. These motors are so small with limited hp so a tweak here or there with the disty curve isn't going to make much difference in a street car. If you can set it to a default curve, I would do so and move on to the next thing needing repair.

You might want to look at the static advance for a non USA car and rip out all they junk if you haven't already.

Hi dnudelman, i wasn’t thinking of tweaking it, I’m just looking for the factory standard curve to put in the “123” dizzy.
Cheers, Ernie

 

[ErnieD]

https://xwebforums.com/forum/index.php?threads/903cc-100gbc-distributor-advance-curve.43584/

Hi Jeff, thanks, someone else sent me this but I’m not sure if it’s the 100GBC. Cheers, Ernie

 

[Jeff Stich]

Hi Jeff, thanks, someone else sent me this but I’m not sure if it’s the 100GBC. Cheers, Ernie

The ones vwchemist posted are for the 843, the one I posted is for the 903 (USA).