4.6L (1996-2004 Modular) Mustang Technical discussions on 1996-2004 4.6 Liter Modular Motors (2V and 4V) within.

70mm or 75mm throttle body?

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Old 10-13-2006, 01:41 AM
  #11  
Nitti00GT
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Default RE: 70mm or 75mm throttle body?

I paid 60 dollars per flowmaster and I got the 40 series. I paid 140 for my off road H which was on sale on a site that is no longer in buisness and was marked down from 160. This shop, which I am now gonna work at, sold me the flowmasters, installed them in place of the factory mufflers, and put in my off road H all for 360 dollars and did a damn good job with the welds. So all together I paid 500 for my exhaust. Girls love the sound of my car and guys ask me what exhaust I have all the time and where I live there is a **** load of Stangs.
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Old 10-13-2006, 01:44 AM
  #12  
03sonicgt
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Default RE: 70mm or 75mm throttle body?

Go with the 75mm, you never know if you go with forced induction. Because when I bought my accufab 75mm tb/plenum combo, I wasn't planning on nitrous. But I'm really happy i went with the 75.
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Old 10-13-2006, 02:12 AM
  #13  
Nitti00GT
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Default RE: 70mm or 75mm throttle body?

Yeah it sounds like the 75mm then. Maybe it was the tune making my buddy's car bog with the 75mm idk.
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Old 10-13-2006, 04:03 AM
  #14  
Aereon
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Default RE: 70mm or 75mm throttle body?

sorry if i'm stealing his thread but what kind of adjustments can i make when installing 75mm tb plenum combo with my xcal2 or is it stupid for a noob to try and adjust it myself?
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Old 10-13-2006, 08:19 AM
  #15  
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Default RE: 70mm or 75mm throttle body?

75mm..........just put it on last week, took a few minutes driving time but once the comuter kicked in everything was worth it. But if you want to feel a differance CAI,TB/plenum, X-pipe, catback, short throw shifter(mgw). it's all good cuz'
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Old 10-13-2006, 12:56 PM
  #16  
Poobs
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Default RE: 70mm or 75mm throttle body?

Aereon

I don't think the tuner or the on board computer will care very much about the new TB. Basically the MAF sees more air going in and sends the apropriate signal and the mixture is adjusted.
U can try fidling with the settings to see if it allows you more gains than you already had.
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Old 10-13-2006, 02:56 PM
  #17  
JCstang01
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Default RE: 70mm or 75mm throttle body?

Yeah go with the 75mm, won't help a whole lot now over the 70mm but you will be setup for the future if you decide to go FORCED INDUCTION. Yeah Baby!!![sm=badbadbad.gif]
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Old 10-13-2006, 03:09 PM
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thornton02GT
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Default RE: 70mm or 75mm throttle body?

I recently installed the things in my sig and i noticed a good amount of difference....I suggest the 75MM, havnt had any probs with it so far.....
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Old 10-13-2006, 03:13 PM
  #19  
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Default RE: 70mm or 75mm throttle body?

Aside for diferences that are part of the design such as bend radiuses, cross sections of pipe and stuff - For a stock motor the 70mm will favor the bottom end. It will give you a bit more power overall. The 75mm will shift that power increase to a slightly higher rpm. You probably would not be able to tell the diference.
If the motor is very tired you may actually loose power with the 75mm bu this is mostly theoretical stuff .

As JC said: For a motor with future mods including a blower the 75mm is the way to go
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Old 10-13-2006, 03:17 PM
  #20  
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Default RE: 70mm or 75mm throttle body?

Forgot to mention I bougth the Profesinal Products TB and plenum, Saved a bunch of money and they work great. $125 for the TB and $95 for the elbow.
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