[Diy_efi] Intake Manifold choices SBC carb to TBI conversion

[Charles Woock]

It is not a hard project but it will be time consuming.  And, I'm not sure 
it will be any cheaper than buying a new carb.  By the time you get all the 
engine parts, ecm, sensors, wiring harness, relays and all the misc. 
stuff... it will add up, unless you already have a donor vehicle that you 
are going to strip.  You'll also need to find a place to mount the O2 
sensor...

I'm doing a conversion now and it seems like it is taking forever.

Good luck.  Charles



----- Original Message ----- 
From: "Mike" <sonoma at shaw.ca>
To: <diy_efi at diy-efi.org>
Sent: Sunday, September 24, 2006 2:24 PM
Subject: Re: [Diy_efi] Intake Manifold choices SBC carb to TBI conversion


> Hi Steven,
> I'm going with TBI to keep costs down and so I can use mostly stock parts, 
> I plan to install an RV cam at some point in time
> Thanks for the reply    Mike...
>
> ----- Original Message ----- 
> From: "Steven P. Donegan" <steve at donegan.org>
> To: <diy_efi at diy-efi.org>
> Sent: Sunday, September 24, 2006 11:51 AM
> Subject: Re: [Diy_efi] Intake Manifold choices SBC carb to TBI conversion
>
>
>> Well, you could use any 4BBL manifold you like and a Holley 4BBL
>> throttle body and plumb the intake ports for injectors. Given it's a
>> motorhome type application going for an RV style cam and an RV style low
>> profile manifold should keep things in the right zone for low RPM
>> torque. If you're not handy with tools doing this conversion will not be
>> easy.
>>
>> On Sun, 2006-09-24 at 11:38 -0700, Mike wrote:
>>> Hi,
>>>
>>>
>>>
>>> Well I finally decided the carb must go and be replaced. Time to convert 
>>> my 350 chev from a 4bbl carb to TBI
>>>
>>>
>>>
>>> I'm thinking of using a stock GM TBI intake 87-91 on my 83 Chev, I will 
>>> have to modify the two bolt holes to make it fit, but it will have stock 
>>> locations for coolant temp etc and hopefully it will be a neater looking 
>>> installation.
>>>
>>>
>>>
>>> My only concern is heat on the TBI intake which I believe is cast 
>>> aluminum, this motor is in a motorhome it doesn't over heat but it still 
>>> gets pretty hot climbing hills in a 10,500LB G series van chassis.
>>>
>>>
>>>
>>> Anyone had any problems with alum intakes because of heat in there 
>>> motorhomes or tow vehicles
>>>
>>>
>>>
>>> I would like to use a stock TBI intake with or without spacer or an 
>>> edelbrock TBI intake, instead of the cast iron QJet manifold with an 
>>> adapter plate.
>>>
>>>
>>>
>>> The vehicle isn't required to have emissions testing and didn't have an 
>>> EGR valve from the factory.  I may run an EGR valve but haven't decided 
>>> yet.
>>>
>>>
>>>
>>> Any info or experiences would be appreciated.
>>>
>>>
>>>
>>> Mike.
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>> -- 
>> "Each new law makes only a single guarantee. It will create new
>> criminals."-- John Tandervold
>>
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>
>
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