305 TBI to 350 TBI....Anybody done this before? - CamaroZ28.Com Message Board


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Old 03-01-2006, 08:36 PM   #1
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305 TBI to 350 TBI....Anybody done this before?

Hey guys I know it's been a few months but well it's tax time and I think i'm ready to buy my replacement engine for the camaro. In case y'all don't remember, my step-dad signed the death certificate on my 305 about six months ago. Well since the 305 is dead i'm wanting to swap to a TBI 350. Can I use my factory computer? Will I need to add a 2nd cooling fan? Can I use the water pump and other belt driven accessories from my old engine? And last but not least will I need to do any reprogramming or rewiring? Essentially I need to know everything about this swap. As always your help and comments are appreciated.....thanks.
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Old 03-01-2006, 08:39 PM   #2
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Re: 305 TBI to 350 TBI....Anybody done this before?

www.thirdgen.org

Tons of people have done the swap and you will find a lot more info on that board.
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Old 03-01-2006, 08:39 PM   #3
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Re: 305 TBI to 350 TBI....Anybody done this before?

everything from your 305 will bolt up to that 350 fine.
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Old 03-01-2006, 08:40 PM   #4
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Re: 305 TBI to 350 TBI....Anybody done this before?

If your going to be replacing the engine anyway, why not go TPI or LT1?
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Old 03-02-2006, 12:30 AM   #5
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Re: 305 TBI to 350 TBI....Anybody done this before?

dont go lt1, plz.
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Old 03-02-2006, 08:19 PM   #6
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Re: 305 TBI to 350 TBI....Anybody done this before?

I don't plan on going LT1 as much as I like that engine it's going to be way to much of a headache to drop in. I talked to a guy at work last night and he told me that I will have to have the computer programmed? Is this true or can I just find a computer that ran a TBI 350 and put it in my Camaro?
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Old 03-03-2006, 07:38 PM   #7
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Re: 305 TBI to 350 TBI....Anybody done this before?

change the injectors,esc to a 5.7,knock sensor to 5.7 and a few hours labor it will pay off bigtime
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Old 03-04-2006, 09:01 PM   #8
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Re: 305 TBI to 350 TBI....Anybody done this before?

You'll want 61lbs injectors (stock 305 TBI is 55lbs), and a chip for a 91-93 Caprice with 350 TBI.
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Old 03-06-2006, 01:38 PM   #9
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Re: 305 TBI to 350 TBI....Anybody done this before?

Quote:
Originally Posted by Kevin91Z
You'll want 61lbs injectors (stock 305 TBI is 55lbs), and a chip for a 91-93 Caprice with 350 TBI.
How does the Caprice chip differ from a regular 350 TBI chip?
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Old 03-06-2006, 09:11 PM   #10
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Re: 305 TBI to 350 TBI....Anybody done this before?

I did this swap with my old 91 RS and it was pretty straightforward, the intake manifold and TB bolt up no problem. You will need bigger injectors, a different ESC module, tuning and a knock sensor. However, don't throw a Lo5 in there thinking it will be a beast....cause it just wont. Might as well throw a good set of heads and cam in there while you are at it, the Lo5 still has the crappy swirl port heads. GMPP makes a 350 H.O. that is rated at like 330hp and makes a nice home in a thirdgen. It ahs vortec heads though so you'll need a special manifold in order to keep TBI. Of course, you could always ditch the TBI for a carb or whatever you want.
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Old 03-06-2006, 09:13 PM   #11
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Re: 305 TBI to 350 TBI....Anybody done this before?

Quote:
Originally Posted by thirdgenrallysport
dont go lt1, plz.

Whats wrong with the Lt1? I've seen quite a few successful Lt1 swaps in thirdgens and all of which lay down some pretty impressive times and numbers. Its more work but Lt1's are getting cheaper by the day.
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Old 03-08-2006, 06:01 PM   #12
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Re: 305 TBI to 350 TBI....Anybody done this before?

I realize an LO5 isn't going to be a beast but it's a starting point. I may not have a beast now but down the road I will. Right now i'm just concerned with putting a bigger engine in it. That way I can concentrate on how I want the car to look. Basicially i'm starting a project that I should've started two years ago. But i'm lucky not everybody gets a second chance with their first car. Thanks for your help guys i'll keep you posted on how everything turns out.
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Old 03-08-2006, 06:15 PM   #13
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Re: 305 TBI to 350 TBI....Anybody done this before?

I have went from a 305 tbi to a 350 tbi. I just got a 350 tbi out of a chevy truck close to the same year and used the trucks computer. use the accessories off of the 305 and evrything else works perfect. Goodluck, Charles

Last edited by 89_Irocz; 03-08-2006 at 06:23 PM.
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Old 03-08-2006, 06:36 PM   #14
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Re: 305 TBI to 350 TBI....Anybody done this before?

If I got a remanufactured engine and just got the computer from a chevy truck or caprice with the right chip would that work as well?
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Old 03-08-2006, 06:46 PM   #15
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Re: 305 TBI to 350 TBI....Anybody done this before?

Quote:
Originally Posted by 94LT1Maro
If I got a remanufactured engine and just got the computer from a chevy truck or caprice with the right chip would that work as well?

Yeah it will work, I got my 350 from Jasper and got a chip from tbichips.com i dunno if that guy still makes em or not though...its been a while
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