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 tbi to carb

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green96



Posts : 7
Join date : 2012-11-25

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PostSubject: tbi to carb   tbi to carb Icon_minitimeSat Sep 21, 2013 9:03 pm

Wanna put a carbed 350 in my 92 roadmaster what all will i have to do to make this happen
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lakeffect
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lakeffect

Posts : 3889
Join date : 2009-08-18
Location : Rochester NY 14621

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PostSubject: Re: tbi to carb   tbi to carb Icon_minitimeSun Sep 22, 2013 9:04 am

The real question is WHY?


Are you doing other mods and trying to get away from reprogramming?
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BoxWagon

BoxWagon

Posts : 53
Join date : 2012-12-11
Age : 27
Location : Long Island, NY

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PostSubject: Re: tbi to carb   tbi to carb Icon_minitimeSun Sep 22, 2013 9:37 pm

I would personally leave the tbi. When functioning properly, injection it is generally better than carbs for driving applications. If you decide to switch, you will need to:

-Switch out the intake manifold for a carb one
-Get a carb, obviously
-replace the distributor with one that does not have electronic advance
-install a return style fuel pressure regulator or a fuel pump designed for a carb and a tank pickup
-Leave the ECU, it controls more than just fuel/spark. The transmission torque converter lock up depends on it.

There's missing info, but that's the gist of it. If the switch is made other things should be factored in. You need all the necessary gaskets, throttle linkages/springs/brackets and fuel line fittings.

I'm sure there's more to it, but those are the major points. Oh, and the check engine light will throw fits.

-Tony
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BoxWagon

BoxWagon

Posts : 53
Join date : 2012-12-11
Age : 27
Location : Long Island, NY

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PostSubject: Re: tbi to carb   tbi to carb Icon_minitimeSun Sep 22, 2013 9:48 pm

Well that's for converting. Just realized you would be switching the engine. Basically the same thing though. If you already have the engine setup, then ignore the above that's obvious.

-Tony
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Krzdimond
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Krzdimond

Posts : 3398
Join date : 2008-11-04
Age : 52
Location : Savannah, GA

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PostSubject: Re: tbi to carb   tbi to carb Icon_minitimeSun Sep 22, 2013 10:39 pm

Didn't the 92's have the 700R4 (NON electronic) transmissions?
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convert2diesel



Posts : 945
Join date : 2009-01-05
Age : 66
Location : Manotick, Ontario

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PostSubject: Re: tbi to carb   tbi to carb Icon_minitimeSun Sep 22, 2013 11:16 pm

Superior Finish wrote:
Didn't the 92's have the 700R4 (NON electronic) transmissions?
The ECM still controlled the lockup convertor.

Bill
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phantom 309

phantom 309

Posts : 5811
Join date : 2008-12-28
Age : 109

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PostSubject: Re: tbi to carb   tbi to carb Icon_minitimeMon Sep 23, 2013 1:54 am

convert2diesel wrote:
Superior Finish wrote:
Didn't the 92's have the 700R4 (NON electronic) transmissions?
The ECM still controlled the lockup convertor.

Bill
He could run a simple late 80.s vacuum pot for the lockup,.
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BoxWagon

BoxWagon

Posts : 53
Join date : 2012-12-11
Age : 27
Location : Long Island, NY

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PostSubject: Re: tbi to carb   tbi to carb Icon_minitimeMon Sep 23, 2013 1:19 pm

There's plenty of kits to control the lock-up manually or via a vacuum switch. Or you could piece it together pretty cheaply too. The ECM should continue to do it as long as the vacuum line is reconnected. Unless the ECM must go, I would leave it so you don't have to fuss with other means of lock-up control. Although the other means are pretty simple and cheap.

Just my 2 cents.

-Tony
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green96



Posts : 7
Join date : 2012-11-25

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PostSubject: Re: tbi to carb   tbi to carb Icon_minitimeMon Sep 23, 2013 9:15 pm

I already have a mildly built 350 and i was just thinking i might put it in the roadmaster so i was asking to see what all would have to be done thanks for the info guys
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jayoldschool

jayoldschool

Posts : 2544
Join date : 2009-06-14

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PostSubject: Re: tbi to carb   tbi to carb Icon_minitimeTue Sep 24, 2013 11:34 am

Best of both worlds. Put the built 350 in, run it with TBI.
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lakeffect
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lakeffect

Posts : 3889
Join date : 2009-08-18
Location : Rochester NY 14621

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PostSubject: Re: tbi to carb   tbi to carb Icon_minitimeTue Sep 24, 2013 7:36 pm

+1 . Agreed.
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green96



Posts : 7
Join date : 2012-11-25

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PostSubject: Re: tbi to carb   tbi to carb Icon_minitimeTue Sep 24, 2013 9:25 pm

That does sound a lot cheaper
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benn

benn

Posts : 557
Join date : 2011-12-22
Location : Ontario, Canada

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PostSubject: Re: tbi to carb   tbi to carb Icon_minitimeWed Sep 25, 2013 1:43 am

ive always heard tuning was a big pain in the arse with tbi...
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lakeffect
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lakeffect

Posts : 3889
Join date : 2009-08-18
Location : Rochester NY 14621

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PostSubject: Re: tbi to carb   tbi to carb Icon_minitimeWed Sep 25, 2013 8:21 pm

If you run the 350 as TBI, there is a stock memcal ( chip ) for it. If it is modified with headers, cam heads etc, then welcome to the wonderful world of programming.
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