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12/12/2017 8:53 PM  #1


"Homemade" throttle body

I have been gathering parts to convert the 302 in my Galaxie to EFI.  I built a MegaSquirt ECU 5 or 6 years ago.  I also gathered up the modern upper and lower EFI intake but I don't think I have clearance between the top of the modern intake and the hood so I am planning to drill holes in an edelbrock performer intake and add fuel injector bungs (already have a nice set of rails).  I was trying to find a throttle body but they all are big $$ so I decided to take the modern throttle body and adapt it to look like a carb, use a carb air cleaner and mount to the edelbrock intake.

here is the foxbody throttle body and a 1" square bore spacer






I started by drilling a vacuum port.  I drilled out a 1/16" hole all the way through, enlarged it to 5/16" wide 1/2" into the spacer and then drilled two more 1/16" holes at an angle




I then used a homemade tool to create a perfect thread


here is another shot of my tool


As you can see from the gasket on the spacer, the throttle body is about a perfect fit on the square bore


Another shot of the vacuum port and port holes


I then marked and drilled the holes for the studs.  1/4" holes and 3/4" deep so they didn't go all the way through.


I once again used another home made tool like before, I call it a “square tap” as it makes the tap square to what you are tapping as you use it.


Once threaded the studs went right in.


installed gasket


Throttle body looks right at home on the spacer and will fit nicely on my intake.


If it isn't broken...modify it anyway! http://www.DazeCars.com https://galaxieforum.boardhost.com
 

12/12/2017 9:25 PM  #2


Re: "Homemade" throttle body

Great job as usual Daze!!

 

12/12/2017 9:39 PM  #3


Re: "Homemade" throttle body

I like that tool for tapping, I always struggle with being straight on starting a tap.

Your handiwork is always impressive.


John  -- 67 Mustang Coupe 390 5 speed
 

12/12/2017 9:41 PM  #4


Re: "Homemade" throttle body

I read about the MegaSquirt way back when it was just getting going.  Apparently the system doesn't require an idle air valve of some sort.

I was just talking to Barry (5.0 Vert) about doing this same thing with a Ford EEC-IV system and designing a way to hide the MAF in a stock type air cleaner housing.  Maybe some day.

Nice work, Day...as usual.

BB

Last edited by Bullet Bob (12/12/2017 9:43 PM)


"you get what you pay for, good work isn't cheap, and there are NO free lunches...PERIOD!"
 

12/12/2017 9:52 PM  #5


Re: "Homemade" throttle body

Bolted to Floor wrote:

I like that tool for tapping, I always struggle with being straight on starting a tap.

Your handiwork is always impressive.

 
That’s an idea I came up with quite a few years ago. They’re really easy to make and they work really really well. You never have to worry about stripping out the first few threads or the threading going in crooked. Anytime I have a new size that I’ve never made before I make one. In fact I had to make the one for the 5/16 stud holes as I did not have one in that size.


If it isn't broken...modify it anyway! http://www.DazeCars.com https://galaxieforum.boardhost.com
     Thread Starter
 

12/13/2017 2:26 AM  #6


Re: "Homemade" throttle body

I still need to fabricate a top plate so the air cleaner has a place to sit/attach. I will post more pictures when I get that part done.


If it isn't broken...modify it anyway! http://www.DazeCars.com https://galaxieforum.boardhost.com
     Thread Starter
 

12/13/2017 10:04 AM  #7


Re: "Homemade" throttle body

Daze, I really like the tap starter tool.  That was a great idea.  I sure needed one of those many times.  And making something out of nothing is my favorite thing.  A nut and a piece of scrap steel.  Excellent!  Now, I have to go fire up the welder and make a set of them!.

How does it function on tapered pipe thread?


Money you enjoy wasting is NOT wasted money... unless your wife finds out.
 

12/13/2017 10:36 AM  #8


Re: "Homemade" throttle body

I've got two done already 1/4 coarse and fine and am starting on the 5/16 set!

 

12/13/2017 12:35 PM  #9


Re: "Homemade" throttle body

Nice job!

 

12/13/2017 3:37 PM  #10


Re: "Homemade" throttle body

 

12/13/2017 4:44 PM  #11


Re: "Homemade" throttle body

You guys crack me up.  I was pleased at how well the throttle body was going together and expected more thoughts on the project, concerns and what not, but you guys are totally side tracked by the home made tool. Thats hilarious.  

Hit a small snag.  Went to install the fast idle air control valve and realized it was going to stick up to far past the opening and hit the 1" spacer on the bottom.  I quickly realized that if I turn it upside down and make an 1/8" spacer to go between it and the throttle body everything will clear. crises averted.


If it isn't broken...modify it anyway! http://www.DazeCars.com https://galaxieforum.boardhost.com
     Thread Starter
 

12/13/2017 7:05 PM  #12


Re: "Homemade" throttle body

MS wrote:

Daze,

How does it function on tapered pipe thread?

Ya, what's your trick on the tapered pipe thread tap?


Bob. 69 Mach 1, 393W, SMOD Toploader, Armstrong  steering, factory AC.
 

12/14/2017 4:11 PM  #13


Re: "Homemade" throttle body

What a neat tap tool!!!  TB work is OK also.

 

12/15/2017 4:58 PM  #14


Re: "Homemade" throttle body

rpm wrote:

MS wrote:

Daze,

How does it function on tapered pipe thread?

Ya, what's your trick on the tapered pipe thread tap?

Use a drill press or milling machine spindle to press down on the tap while the piece is held vertical in a vice.  Start the tap with an open end wrench and continue applying downward pressure with with spindle.  I learned that trick building guns a few years back. 
 

 

12/15/2017 6:02 PM  #15


Re: "Homemade" throttle body

TKOPerformance wrote:

rpm wrote:

MS wrote:

Daze,

How does it function on tapered pipe thread?

Ya, what's your trick on the tapered pipe thread tap?

Use a drill press or milling machine spindle to press down on the tap while the piece is held vertical in a vice.  Start the tap with an open end wrench and continue applying downward pressure with with spindle.  I learned that trick building guns a few years back. 
 

 
Most know that old trick of holding the tap with a drill press. Maybe I just assumed the brass fitting Daze used was a pipe thread fitting.  And I could not see how a straight thread nut would guide a tapered pipe thread tap.   I suppose it could be done?


Money you enjoy wasting is NOT wasted money... unless your wife finds out.
 

12/15/2017 8:31 PM  #16


Re: "Homemade" throttle body

I ran a die over the 1/8” pipe thread on the fitting and converted it to 3/8” fine thread. I will use a little RTV on the threads however I don’t think it’s actually needed as the fitting is tight. I have done this before and gotten a perfect seal with out any sealent. I thought it was kind of odd and was wondering why you were asking about pipe thread. Makes sense now. 😀😀


If it isn't broken...modify it anyway! http://www.DazeCars.com https://galaxieforum.boardhost.com
     Thread Starter
 

12/15/2017 9:51 PM  #17


Re: "Homemade" throttle body

 FYI, brass fittings that have  1/8" NPT threads can be installed in holes that have been tapped with a 1/8x27 NPT  or 1/8 NPS tap.
 The NPS is a straight  pipe thread so you could make a tapping fixture as above.

Last edited by Rudi (12/15/2017 9:53 PM)


Good work ain't cheap, Cheap work ain't good!   Simple Man
 

12/18/2017 11:23 AM  #18


Re: "Homemade" throttle body

Nice work, I had plans to try to do the same thing on my home built EFI 351C 4v until I scored a Massflo throttlebody and MAF. It wasn't cheap but it was the best $650 I've spent!



You mentioned IAC issues, you can always go with a remote IAC or maybe a 94-95 IAC as they're shorter.

You might be able to use the restrictor kit as your spacer.
https://lmr.com/item/LRS-9939A/1986-93-Mustang-50L-58L-Idle-Air-Control-Iac-Adjuster?gclid=EAIaIQobChMIhabfooiU2AIVWbbACh0dWQC9EAQYASABEgL0hvD_BwE

Remote IAC setup is another idea
http://www.modularmotorsportsracing.com/cart/index.php?main_page=product_info&products_id=701

 

 

1/26/2018 4:58 PM  #19


Re: "Homemade" throttle body

Just neat


I made enough money to buy Miami, but pissed it away so fast
 

Board footera


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