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  • 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk-
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Fox throttle body swap (First impressions)

  • Thread starter Thread starter Bling
  • Start date Start date Feb 8, 2004
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Bling

Founding Member
Jan 17, 2002
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L.V N.V.
Feb 8, 2004
#1
  • Feb 8, 2004
  • #1
I finished my fox throttle body swap today. This swap is so easy, it's a wonder why I did'nt do it earlier. With the wiring help I got off here and a few basic tools, this swap took less than an hour of actual work (not counting stopping to b/s and looking for all the parts in the garage). First thing is how much cleaner this looks. It's so nice to be able to actually see all the plugs and be able to remove the v/c in a few minutes. I now have the curse of the whistling BBK T/B though. No big deal, just forgot that fox T/B's whistle a bit. Performance wise the car is amazing. Throttle response is crisp and immediate. On a few quick WOT passes I am now seeing 12-13#'s. With the old setup I saw a max of 10#'s. I'll hopefully have some dyno #'s in a week or so to back up my SOTP readings. Pics will be up tomorrow.
 

swingline

New Member
Sep 18, 2003
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TCB - Taking Care of Business
Feb 8, 2004
#2
  • Feb 8, 2004
  • #2
Cool. Glad to hear everything went well.
 

Killercanary

The car that set the bar.
Founding Member
Nov 29, 1999
5,676
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76
Altoona, PA
Feb 8, 2004
#3
  • Feb 8, 2004
  • #3
I still don't understand how the fox setup is a benefit. The air must make a 90* turn instead of a 45* which should be better. I just don't understand why this swap makes a difference in power....
 

RIO5.0

15 Year Member
Feb 16, 2001
6,892
8
128
N.H.
Feb 8, 2004
#4
  • Feb 8, 2004
  • #4
Cool...glad to hear it works...I had mine all hooked up, adjusted the TPS, sounded nice and crisp....Then I tore it down again....
What did you have an intake...didn't notice???
 

SorsCode

20+ Year Stangneter
Jun 10, 2003
1,022
432
113
St. Louis, MO
Feb 8, 2004
#5
  • Feb 8, 2004
  • #5
Killercanary said:
I still don't understand how the fox setup is a benefit. The air must make a 90* turn instead of a 45* which should be better. I just don't understand why this swap makes a difference in power....
Click to expand...

I'm actually with you on that.. I don't understand the benefit of changing over either..
 

1105

I AM the random post master...bow down
May 3, 2003
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Daytona Bch, FL
Feb 8, 2004
#6
  • Feb 8, 2004
  • #6
Maybe the air is going in at a straighter angle with the fox setup? if you think about the 94/95 setup, its still going around a curve when its entering the intake... The fox setup will allow it to flow in straight?
 

red94fiveo

New Member
Apr 12, 2003
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Wichita, KS
Feb 8, 2004
#7
  • Feb 8, 2004
  • #7
But the air still has to pass through a curve in each setup, just in a different place, so it shouldn't make a difference. It also has to travel about the same distance, im with you Paul, I don't get this one.
 
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yellow1995Cobra

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Dec 23, 2002
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Massachusetts
Feb 8, 2004
#8
  • Feb 8, 2004
  • #8
Could it be the way the tbody opens? maybe the sideways opening of the fox tb causes a smoother flow.
 

1105

I AM the random post master...bow down
May 3, 2003
3,841
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0
Daytona Bch, FL
Feb 8, 2004
#9
  • Feb 8, 2004
  • #9
yellow1995Cobra said:
Could it be the way the tbody opens? maybe the sideways opening of the fox tb causes a smoother flow.
Click to expand...
The fox TB, when open, the flap sits vertical?
 
Y

yellow1995Cobra

New Member
Dec 23, 2002
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Massachusetts
Feb 8, 2004
#10
  • Feb 8, 2004
  • #10
Rotate our tbody 90 degrees to the left. Thats how the fox style sits. The throttle cable grabs from the bottom of the tbody..
 

stang_gt_1994

Founding Member
Mar 21, 2002
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0
Powder Springs, GA (30 min. from Atlanta)
Feb 8, 2004
#11
  • Feb 8, 2004
  • #11
I also have the FOX setup. I did mine to be different and I think it looks a lot cleaner.
 

Killercanary

The car that set the bar.
Founding Member
Nov 29, 1999
5,676
1
76
Altoona, PA
Feb 8, 2004
#12
  • Feb 8, 2004
  • #12
1105 said:
Maybe the air is going in at a straighter angle with the fox setup? if you think about the 94/95 setup, its still going around a curve when its entering the intake... The fox setup will allow it to flow in straight?
Click to expand...

Yes it is straighter AFTER the T-body, but the fox has a much larger bend directly in front of it. Its a 90* bend. Looking at our setup to the fox's, ours has less sudden and profound bends if a homemade CAI is used. The factory rubber inlet has 2 ~90* bends before the T-body and that could definitely cost power versus the fox setup. Obviously the blower guys keep finding power with the swap... I just wonder why and what gains if any could be found on a NA car.
 

yellow5.0cobra

Founding Member
Jul 25, 2002
2,849
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0
In the garage, On the floor.
Feb 8, 2004
#13
  • Feb 8, 2004
  • #13
Im guessing the curve gives the air more velocity entering the TB?

And the air that goes in the long straight pipe gets lazy?


Someone needs to take Thermodynamics 101 to find the pure solution as to WHY...

Sorry, but im done with my schooling!
 

Big Jay

New Member
Aug 4, 2003
130
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0
Tucson, Az.
Feb 9, 2004
#14
  • Feb 9, 2004
  • #14
I think it has to do with the shape of the adapter elbow. The elbow is not a smooth 45*. I just did because I need to run the tall VC.
 
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1fstgt

New Member
May 27, 2003
728
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0
Feb 9, 2004
#15
  • Feb 9, 2004
  • #15
so what did you all have to do for the swap? did you have to make any brackets or anything like that? i might do have to do this one.
 

GTJake

Founding Member
Oct 28, 2002
3,049
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56
Ann Arbor, MI
Feb 9, 2004
#16
  • Feb 9, 2004
  • #16
I think it may be because there is no bend AFTER the TB on the fox setup. I plan on switching to the fox setup. We'll see what kind of numbers I get.

Jake
 
B

Bling

Founding Member
Jan 17, 2002
127
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16
L.V N.V.
Feb 9, 2004
#17
  • Feb 9, 2004
  • #17
The stock Vortech inlet has 2 bends in a 5 inch space. I've never liked the 94-95 elbow adapter either. The main reason I did this swap was for looks. It's alot cleaner and just looks better IMHO. Any power gains are secondary and just a perk. The stock inlet was a PITA to get on and off also. Now I have a nice linear 3 inch inlet size from the back of the blower all the way into the intake. As far as NA guys benefiting from this, I'm not sure. Why would anyone be NA anyways J/K. Here's a couple pics.
 

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B

Bling

Founding Member
Jan 17, 2002
127
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Feb 9, 2004
#18
  • Feb 9, 2004
  • #18
Doh, the pics did'nt show up..???

http://www.mustangmods.com/data/728/tn_tn_p2080022.jpg
http://www.mustangmods.com/data/728/tn_tn_p2090019.jpg
 

1105

I AM the random post master...bow down
May 3, 2003
3,841
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0
Daytona Bch, FL
Feb 9, 2004
#19
  • Feb 9, 2004
  • #19
Bling said:
Doh, the pics did'nt show up..???

http://www.mustangmods.com/data/728/tn_tn_p2080022.jpg
http://www.mustangmods.com/data/728/tn_tn_p2090019.jpg
Click to expand...
No pictures for me... at first, but they are working now I think
 
B

Bling

Founding Member
Jan 17, 2002
127
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L.V N.V.
Feb 9, 2004
#20
  • Feb 9, 2004
  • #20
1fstgt said:
so what did you all have to do for the swap? did you have to make any brackets or anything like that? i might do have to do this one.
Click to expand...
Fox parts you need:
Throttle cable
Throttle cable bracket
Throttle body of your choice (Fox style of course)
IAC and TPS
TPS connector off donor car
EGR Eliminator. (I'm not using egr so I used a UPR Delete plate)


I used a 3in exhaust u-bend. Cut it in half, trimmed the excess length, drilled a hole for the bypass and put it on. Pretty simple.
 
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