Junkyard TBI

Does anyone happen to know which OEM throttle body, if any, will bolt to a standard square bore intake without modification? I thought I read in one of the Summit/Jegs catalogs that there is a conversion kit that uses all GM parts with standard square bore intakes. Can't find that info annotated in my catalog now, but got me to wondering if it is something that could just be taken out of the boneyard.

 

GM TBI will require a square bore to GM adapter plate. But it is is a bolt on. I do not know of any OEM that used the adapter.

 

Maybe I misunderstood what the kit was selling. I see now that the kit comes with a square bore adapter. When I read "uses GM parts" and "requires square bore intake" all in the same paragraph, I think I misunderstood to read "GM uses square bore." Found this adapter for not too much $$$:
http://store.summitracing.com/partdetail.asp?autofilter=1&part=TRD-2202&N=700+115&autoview=sku

Looks like a person could just build their own kit for a fraction of the cost.

 

any possible TBIs that will work with a stock 225 manifold?

 

All the GM TBI that I've seen use a triangle shaped 3 bolt pattern with 2 injectors. I've read somewhere that the 4.3/SBC are exactly the same, and the BBC get bigger bores. Haven't confirmed the latter, but can tell you that the 4.3/SBC do in fact appear to be identical. With that said, I think it's not a matter of a TBI so much as it's just an adapter. This might do the trick:
http://store.summitracing.com/partdetail.asp?autofilter=1&part=TRD%2D2204&N=700+115&autoview=sku

 

Do I need to start making these adapters?

 

If you happen to see a guy out mowing your lawn, waxing the truck and taking out the trash wearing a "Will work for JEEP parts" t-shirt, do not be alarmed. R)

 

X2

 

YES ! please make them....you know the saying -- build it and they will come !

 

I can make them quite easily if enough guys want them. I hate building stuff like this 1 at a time but if 2 or 3 would commit to them at once I can make them. Material is always a concern when building things like this. The more I buy the cheaper it is and the less waste I have.

 

I think I would be interested,with a few more people what do you think cost would be?

 

Mark me down for a square bore if you get around to it. Aftermarket is making them out of 1/4" aluminum.

 

I think I can make them for about $25 a piece. Material is about $5-$6 per part including the shipping to me. I would check to see if I can put them in a flat rate envelope and mail them for $4.60 a piece. If I can get the material for that and they will fit in an envelope we could call it $30 including shipping.
Does that price sound fair.
I figured that price on a 3/8" thick adapter until I make sure it will fit on a 1/4" plate, not that much difference on the material cost at that point.

 

I'll will for sure buy one @ That price so sign me up.:v6:

 

I was looking for a TBI to Rochester 2 barrel manifold adapter. I can't seem to locate one, is this something you could make ? I don't really want to throw a 4 barrel manifold on it, unless I have to. Thanks !

 

just to clear up a question from before the 4.3 and SBC TBI's are the same both are 670 CFM and the BBC is in fact larger i just cant remember the CFM on it. oh and the injectors are larger on the BBC as well. im working on a TBI swap right now on a crate motor goin into my 5.:twisted:

 

If you can make it work for a 2BBL I am very interested!

 

With the exception of Clints and Chucks I think, It would be for a stock 225 manifold to a stock 4.3 TBI unit.