Engine Bbk Vs. Edelbrock Throttle Body For Sn95 5.0, Which Brand Is Better?

I am sure the BBK and the Edelbrock TB's are good enough to last a long time. And yeah, the manufacturer of our fine cars cut as many corners as they could using sand castings for nearly everything. It's cheap. Is it better? No. Quality is quality. John Force uses billet blocks for a reason. A company develops cast parts to save money. Not to produce a quality part.

I have machined lots and lots of castings in my career. I have seen what lies under the skin. Porous material, casting irregularities, etc. The quality of the casting depends on who made the sand cast and how well they filled the mold. We get castings with .100" variance. I have cut chips on castings that were the size of a softball that cost $1400 each, and they were still not as good as the exact same parts we developed out of billet.

I also machine a LOT of billet aluminum. 6061, 7075, 2024, etc. Never once have I cut into a piece of billet and found a void in the material. Or cracks. The strength of billet without question is a lot better than a cast part. Not that this would matter much with a TB. But I have been on the development side of a lot of parts that were first prototyped out of billet, then went to castings. The billet prototypes are always far superior to the final cast pieces.

One reason for this is the fixtures required to hold a cast part for machining are always less rigid than fixtures designed to hold billet pieces. This is because billet parts are always exactly the same. So they always fit the fixture exactly the same. Cast parts vary so much the fixtures need to be adjustable. So fixtures for machining cast parts are always kind of sloppy. And the cast parts NEVER sit in the fixture exactly the same. So every single part will be different.

I have owned 6 Fox Mustangs and never once has a throttle cable came off or jam. Anyone else ever hear of this happening?

WhiteCobra95 said:

The motivation was a 60 mBar pressure drop across the stock throttle body that I measured at 920 kg/hr air flow on a friend's SN95 a couple of years ago. That's roughly a 6% drop in flow potential at his peak power point. This inspired me to look at the options out there to avoid the same restriction.

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Let's assume that is correct for discussion purposes. Do you have any data showing other TBs perform better and does it matter if the real choke point is probably the flow through the lower intake or heads?

Well dang it guys. I waited 2 years to buy a TB. I have been researching all this time to figure out if I wanted to make the swap. At first I was very hesitant and was just going to buy and elbow and an SN TB back on. But all I ever here is the Fox TB is the way to go. ITs great. I makes the car run better so on and so forth. Never heard one bad thing about the swap other than it being a small pain to get the cruise control set back up. So finally I shell out the money for a 75 MM Edelbrock Fox TB to do the conversion and now this thread pops up !!!!! Somebody please convince me that swapping to fox TB is the way to go. other wise Im going to buy an elbow and just keep everything sn 95.

Like I said, my Fox ran great. Never had a single problem with it. I have never swapped an SN95 to one though so I can't help you there.

I suspect the FOX swap crowd just want to believe it was a good decision. Who on the forums complains about the factory setup? I ran the stock TB with the KB until I did a complete engine rebuild and only then did I change the TB to match the KB intake of 70mm. It's still the SN setup. And if a straight air flow path is so important why would one change the SN to a FOX that requires a 90* bend in the air tube.