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#1
Jun 8 2016 04:04am
To give some material to my question:
Quote
Sidedraft carbs and downdraft carbs work the same, just that the throttle bores/venturis are situated differently. (I have no hard proof but do have a strong feeling that Weber IDFs are just downdraft DCOEs - enough parts interchange)

You can't convert one type of carb to the other. All the important bits (the float bowls and the layout inside) are dependent on which way gravity is facing. One reason why EFI is kinda popular with rockcrawlers - their rigs are typically *not* level with gravity

-

The best sidedraft carb setup is one-piece and situates the carb over the side of the engine, so the airflow doesn't have to make two 90 degree turns. These are available in single and double carb setups, the single carb manifold being known as the Lake Cities manifold.


Now I'm wondering during a hard turn (drifting for instance) would the flood swish from one side of the carb to the other side due to the center of gravity being moved, and ultimately cause rich/lean conditions?

Car is currently down and I'm deciding between mikuni/edebrock/holley/webers. Don't wanna pay too much for equal performance, but don't wanna buy a temporary carb that can't handle my driving.
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#2
Jun 8 2016 07:47am
In Theory yes, but in reality no.

Drifting is usually WOT / High RPM which gives you a ton of air flow through the carb and thus negating the effects of gravity on your fuel flow. Will it change? Possibly... but not enough to get excited about.

Rock crawlers are so suspect to this because they are not always WOT and at many points sitting at idle on their door.
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#3
Jun 8 2016 08:13am
crawlers/off road stuff it is beneficial to be fuel injected because of the fucked up angles and the constant low speed bouncing around


while "drifting" wont cause almost any issues

the dirt oval race cars that we run are all carbed
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#4
Jun 8 2016 05:47pm
Quote (KoJ @ Jun 8 2016 09:13am)
crawlers/off road stuff it is beneficial to be fuel injected because of the fucked up angles and the constant low speed bouncing around


while "drifting" wont cause almost any issues

the dirt oval race cars that we run are all carbed


i was told to carb my celica, but i say no

altho, thinking about it, might be better off that way, instead of fighting the ecu once i pull all the california emissions bullshit
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#5
Jun 8 2016 07:29pm
Quote (TeaBaggery @ 8 Jun 2016 19:47)
i was told to carb my celica, but i say no

altho, thinking about it, might be better off that way, instead of fighting the ecu once i pull all the california emissions bullshit


I wouldn't go from fi to carbed.. but thats just me....
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#6
Jun 8 2016 08:13pm
Quote (jimmyhoud @ Jun 8 2016 06:47am)
In Theory yes, but in reality no.

Drifting is usually WOT / High RPM which gives you a ton of air flow through the carb and thus negating the effects of gravity on your fuel flow. Will it change? Possibly... but not enough to get excited about.

Rock crawlers are so suspect to this because they are not always WOT and at many points sitting at idle on their door.


this is the answer you're looking for.

Quote (F150 @ Jun 8 2016 06:29pm)
I wouldn't go from fi to carbed.. but thats just me....


and this. 100%.

you gain nothing from going back to carbed. tuning EFI is just like carbing a car correctly.
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#7
Jun 8 2016 09:32pm
Quote (superfinger @ Jun 8 2016 09:13pm)
this is the answer you're looking for.



and this. 100%.

you gain nothing from going back to carbed. tuning EFI is just like carbing a car correctly.


I know nothing about EFI tuning, is it really that easy?

Not saying getting it perfect, but the Honda I run right now is beyond rich, I have no clue how to adjust it, most of the sensors have been removed
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#8
Jun 9 2016 10:46am
Quote (TeaBaggery @ Jun 8 2016 08:32pm)
I know nothing about EFI tuning, is it really that easy?

Not saying getting it perfect, but the Honda I run right now is beyond rich, I have no clue how to adjust it, most of the sensors have been removed


Efi tuning can be easy but with any EFI based tune. Easy =/= Good
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#9
Jun 9 2016 02:19pm
Quote (TeaBaggery @ Jun 8 2016 08:32pm)
I know nothing about EFI tuning, is it really that easy?

Not saying getting it perfect, but the Honda I run right now is beyond rich, I have no clue how to adjust it, most of the sensors have been removed


Quote (jimmyhoud @ Jun 9 2016 09:46am)
Efi tuning can be easy but with any EFI based tune. Easy =/= Good


just gotta learn how to map it correctly.
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#10
Jun 9 2016 02:22pm
Thanks everyone for the response =)

I think it's cheaper to buy a complete car that has a carb, than setting your car up for carb....
so much work, and if you order parts for everything (including the throttle cable) you'll end up tossing $1500 for new parts.

Quote (KoJ @ Jun 8 2016 09:13am)
crawlers/off road stuff it is beneficial to be fuel injected because of the fucked up angles and the constant low speed bouncing around


while "drifting" wont cause almost any issues

the dirt oval race cars that we run are all carbed


for small drifts I notice it doesn't do much, but any very long drift I'll notice my car kinda burps, and when I clean the spark plugs one side is richer than the other.
but now I may be thinking it just might be my car.

This post was edited by Arcolithe on Jun 9 2016 02:24pm
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