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auto carbys
Posted: Tue Dec 22, 2009 12:27 am
by me217
hey
i was just wondering the difference between the auto carby and the manual carby. as i am putting an engine out of an auto hatch into my manual mighty boy. i got the engine out and painted up. just about ready to fit the manifolds and gearbox. just need to find out a few small things
Posted: Tue Dec 22, 2009 12:47 am
by Brayden
Auto carby has no overrun enrichment system, and has additional vacuum solenoids for idle-up. The jetting is the same auto/manual though.
Posted: Tue Dec 22, 2009 9:38 pm
by me217
so i need to use the manual carby?
Posted: Wed Dec 23, 2009 9:29 pm
by Brayden
If the carby suits the motor then yeah.
Posted: Wed Dec 23, 2009 11:49 pm
by me217
well thats just one more thing i gotta swap ova then lol
Posted: Mon Jan 04, 2010 7:21 pm
by me217
what does the overrun enrichment system actually do
Posted: Mon Jan 04, 2010 8:29 pm
by Brayden
Prevents the motor from leaning out on overrun.
Posted: Mon Jan 04, 2010 9:16 pm
by me217
is overrun when your in 4th?
Posted: Mon Jan 04, 2010 9:17 pm
by Jermaine
its for the auto.. they only have 2 gears
Posted: Mon Jan 04, 2010 10:15 pm
by Brayden
The overrun enrichment system is for manual carbies, and it works when the engine is in overrun - basically when you back off the throttle in any gear and the motor is being driven by the wheels instead of the other way around.
Posted: Mon Jan 04, 2010 10:30 pm
by Billie
Also when your going down a hill, not using throttle
Posted: Tue Jan 05, 2010 1:45 pm
by me217
o ok thanks. now i understand
Posted: Tue Jan 05, 2010 8:33 pm
by Jermaine
oww i thought u said over drive haha
Posted: Fri Mar 05, 2010 8:31 am
by Husky
Im putting a F8b manual carby on my AUTO MB.(F8b conversion) I have the F8b man carb and F5a auto carb(original). Do i need to swap something over from the F5a auto carb to the man F8b?
Thanks
Posted: Fri Mar 05, 2010 9:23 am
by Brayden
From my experience it is problematic to use a manual carby on a motor with an auto box. I would swap the jets from your F8B carby into the F5A one.
You're also going to run into issues if you only have an F8B manual intake manifold too, because it is missing one of the temperature control switch for cold start idle.