Ford throttle bodies on 3x00's

[ikessky]

I see some of you guys are using Ford 4.6L TB's with the 3500 swap. Would it be possible to do this on a 3x00? The only thing that concerns me a little is the fact that the IAC looks like it remotely mounts from the TB itself. BTW, I was looking at the pictures in this thread if you are wondering: http://www.60degreev6.com/index.php?...ewtopic&t=6256

[bszopi]

RE: Ford throttle bodies on 3x00

Since I slacked and didn't respond to your PM...

http://www.60degreev6.com/index.php?name=PNphpBB2&file=viewtopic&t=5288

Solves the IAC issue. And with some modding to how it mounts, yes it could be put on a 3x00.

[ikessky]

So I would basically have to make an EGR/IAC adapter. I worry a little that the passage will get gummed up by the EGR and will screw up the IAC. Am I not thinking clearly though?

[Guest]

I have no idea what that TB is off. (I also didn't read the thread too much), but a Mustang TB would probably be better to use, since there is an IAC port on it, just needs an adaptor.

[ikessky]

The late model 4.6L uses the same TB across Ford's platforms from, I believe, '96+ vehicles. At least that's what it looks like on eBay. Do know what year Mustang you are looking at?

[RacerX11]

The 5.0 Ford TB's had the IAC ports on the TB itself, but the later 4.6 engines used a seperate housing for the IAC, so the TB does not have the ports or mounting points. I have made an adapter for my early style 5.0 TB to mount the GM IAC where the Ford IAC used to be, so this isn't a problem. The advantage of the late 4.6 TB's is they are 65mm stock, and lots of people upgrade to bigger ones, so they can be had pretty cheap on Ebay. The earlier 5.0 engines came with smaller TB's stock, so there is larger demand for the 65mm and larger units, driving up the prices. Even still, I have seen 65mm and 70mm units going for ~$100, which is a decent price, IMO.

If you need to retain your EGR, I would recommend using one of the 5.0 TB's, and an adapter to mount the IAC directly on the TB. Functionally you could make an adapter to use both the EGR and IAC through the same port, but it could get tricky. I have thought about designing an adapter plate that bolts between the plenum and Ford TB, which converts the bolt pattern, and has provisions for the GM IAC. This adapter would need to be ~1-1/4" to 1-1/2" thick, so I don't know if there would be clearance issues.

Marty

[ikessky]

Any pictures???

[RacerX11]

I'll have to take some tonight when I get home.

[bszopi]

Pictures of what? There are several pictures of the adapter Marty made on the second page of the thread I posted, if that is what you are looking for.

I can probably design an adapter to go between the TB and manifold, and there might be a way to make it thinner than the 1.5" of the current adapter. If I get a chance tonight, I'll draw one up in CAD to explain how I think it could work...

[RacerX11]

I will take pictures of the adapter I made that mounts directly to the 5.0-style Ford TB. I haven't posted any of it yet.

The IAC itself is ~1-1/4" wide, so that would probably be the thinnest you would be able to go with an adapter. I planned to go to 1-1/4" if I make any more of the 3500 adapters.

Marty

[ikessky]

Brad - If you could draw something up that would allow us to use the 4.6L TB (like they've done with the 3500 intake), but go in between the intake and the TB, I would greatly appreciate it. I'm assuming there would be a hole in which I would have to install a hose barb and then plumb that back into the intake tube. Bah...... I would draw something myself, but I can't do CAD work.

[RacerX11]

Here is the adapter I made for my older style Ford 5.0 TB. I used 1-1/2" thick aluminum, but I plan to mill it down to 1-1/4" or less, and recess the bolts using socket-head cap screws instead of the regular hex bolts. I'm not sure on other cars if having this block stick straight up would cause hood clearance problems or not.

Marty

[bszopi]

Here are a couple quick ideas I had and drew up...

[ikessky]

Let me know what you need in order to put some dimensions to this thing, Brad. I'm assuming you can get the dimensions from gaskets correct? Just let me know and I'll get you what you need.

Now, can the 3100 TPS be used, or would I have to rewire to use the Ford connector? I remember on the other post that the Ford TPS should work since it is very similar in the voltage.

[bszopi]

Its designed for the stock IACand that would be the easiest way to do it IMO. As far as dimensions, it is currently drawn to match Marty's TB, so the 4.6L setup might be alittle different. But, Marty and I were just discussing making this more of a universal design...

One of the issues in production would be the whole going from the IAC to the TB. If the unit was one piece, it would have to be drilled from the bottom and then sealed off. So then I thought, why not make it 2 pieces, which are bolted together. And that brought up another idea. If its 2 pieces, it becomes extremely universal. We could design top adapters for several different TBs and/or plenums, and the IAC section would just bolt to it.