Entering the World of Carburetors (4ag)

Angle mods and engine builds. Even how to drift or build a boat. Post it here.
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Saigons Son
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Entering the World of Carburetors (4ag)

Post by Saigons Son » Tue May 20, 2014 12:36 am

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Picked up a Brand new pair of Weber 40 DCOE Side draft carbs for the corolla. (Got a great deal on them)


Why?
Cost of tuning is less:
1- No expensive EFI computer needed to adjust for future upgrades (cams etc)
2- DIY tuning can be done at home (I find this very interesting and fun)

My EFI fuel pump bracket is broken [$100+ from Dealership] - Will re-enlist my sr5 bracket for carb set-ups)
(Fuel send line is snapped, currently mcguivered with a larger fuel hose and clamps,
(Wiring terminal broke off as well, currently soldered on)

ITB like response and power for a fraction of the cost

Increased flow by getting rid of the incorrect intake mani (see below)

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Current Set-up:
AE92 Smallport hi-comp head
AE101 block - stock internals
Bigport In Mani (Normal RWD) with T3 adapter plate.


Using the Bigport Manifold on a smallport block restricts air flow. Since you are removing TVIS butterfly valves and attaching to you smallport head Via T3 adapter plate, your intake is split into dual runners for no reason.

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(See TVIS Butterflys)

You are left with a dual runners
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Bigport manifold w. TVIS deleted (Left) Smallport Manifold originally FWD (Right) [This has been cut and rewelded, converted to RWD]

This is explained throughly in this link
http://www.whyturbothat.com/project86%20.html

More Carb Shit (4ag specific)
http://club4ag.com/faq_and_tech_pages/C ... _4A-GE.htm
Last edited by Saigons Son on Tue May 20, 2014 12:59 am, edited 1 time in total.
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Yoshi
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Re: Entering the World of Carburetors (4ag)

Post by Yoshi » Tue May 20, 2014 12:45 am

like!

Though, V8s are better
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Status: HG repair. 488wtq though!
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Saigons Son
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Re: Entering the World of Carburetors (4ag)

Post by Saigons Son » Tue May 20, 2014 12:48 am

New Set up-

Weber 40 DCOE Side Draft Carbs
34mm Choke
Jets and Venturi (TBD)

Basically you change out Jets / Venturi/ Emulsion Tubes to tune


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As the Throttle opens, your fuel is adjusted accordinly in 3 steps (Circuits)
Idle
Progression
Cruise (Main)


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Awesome explanation of Webers and side draft carbs in general (Non 4ag specific)
http://www.tr3a.info/WeberDCOEinfo.htm



The End Result
Last edited by Saigons Son on Tue May 20, 2014 1:56 am, edited 1 time in total.
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jalopi
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Re: Entering the World of Carburetors (4ag)

Post by jalopi » Tue May 20, 2014 1:00 am

Not sure if I'd convert from fuel injection to a carb, but I don't have any complaints about mine.

Some people (on the internet) have mentioned that carbs are crap for drifting, something about the floats getting all buggered up in high-g situations. I understand the concept and it makes sense, but hasn't been an issue for me - yet.
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dajemma
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Re: Entering the World of Carburetors (4ag)

Post by dajemma » Tue May 20, 2014 1:26 am

yeah tuning and getting the floats right is tough. but they do flow much better than EFI, even with ITBs.

I'd really like to see you get this working. It's gonna be tough, you might need some old mechanic guy to help you tune it, cuz carbs are some old-school shit.
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Saigons Son
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Re: Entering the World of Carburetors (4ag)

Post by Saigons Son » Tue May 20, 2014 1:32 am

jalopi wrote:Not sure if I'd convert from fuel injection to a carb, but I don't have any complaints about mine.

Some people (on the internet) have mentioned that carbs are crap for drifting, something about the floats getting all buggered up in high-g situations. I understand the concept and it makes sense, but hasn't been an issue for me - yet.

I believe it. Webers are supposed to be the least prone to this though. We will see lol
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RVAMitchell
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Re: Entering the World of Carburetors (4ag)

Post by RVAMitchell » Sun Jun 29, 2014 9:02 pm

I love my carb's on my 4a!
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RVAMitchell
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Re: Entering the World of Carburetors (4ag)

Post by RVAMitchell » Sun Jun 29, 2014 9:08 pm

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I just cleaned them, here is a before and after picture!
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Yoshi
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Re: Entering the World of Carburetors (4ag)

Post by Yoshi » Mon Jun 30, 2014 11:13 am

Black magic.
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Status: HG repair. 488wtq though!
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Saigons Son
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Re: Entering the World of Carburetors (4ag)

Post by Saigons Son » Thu Jul 03, 2014 2:17 pm

RVAMitchell wrote:I love my carb's on my 4a!

What do you have set up, jets wise?

That shit cleaned up like crazy!
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