4.6L General Discussion This section is for non-tech specific information pertaining to 4.6L (Modular) Mustangs built from 1996 to 2004.

75mm TB and plenum

Thread Tools
 
Search this Thread
 
Old 09-29-2010, 02:17 PM
  #1  
k2xsnow
1st Gear Member
Thread Starter
 
k2xsnow's Avatar
 
Join Date: Aug 2009
Location: Michigan
Posts: 56
Default 75mm TB and plenum

I plan on going supercharger about 3 years from now, so far my current mods are midpipe shortthrow, drop in k&n. My question is, is it ok to get a 75mm TB? i heard that it will make your car idle very high and will run like ****... and also, Do i even need a plenum?? or will the supercharger come with one?? i don't want to buy parts twice, but if its goingto run crappy then theres really no point in getting it...

the plan was accufab 75mm TB and plenum for about 430$, then soon after its put on, i planned on 3.73 gears and SCT xcal tune, the combo for 544$
k2xsnow is offline  
Old 09-29-2010, 02:30 PM
  #2  
kugzgt
5th Gear Member
 
kugzgt's Avatar
 
Join Date: Jul 2009
Location: Lehigh Valley, PA
Posts: 2,472
Default

75mm will be fine accufab is a very well recognized brand, but very expensive. ive never heard anything about making the car run like **** tho. also i dont think it is maditory to have a plenum but i would recommend it with forced induction.
kugzgt is offline  
Old 09-29-2010, 02:53 PM
  #3  
PurpleIcedGT
6th Gear Member
 
PurpleIcedGT's Avatar
 
Join Date: Aug 2009
Location: New Jersey
Posts: 6,028
Default

Holy Moly. Whoever told you that is fulla sh*t.

2. 4.10s or nothing.
PurpleIcedGT is offline  
Old 09-29-2010, 03:53 PM
  #4  
Kerns
4th Gear Member
 
Kerns's Avatar
 
Join Date: Dec 2008
Location: Tulsa, OK
Posts: 1,478
Default

Originally Posted by PurpleIcedGT
Holy Moly. Whoever told you that is fulla sh*t.

2. 4.10s or nothing.
I would hate 4.10's for anything that is not naturally aspirated.
Kerns is offline  
Old 09-29-2010, 03:56 PM
  #5  
tbirdscwd
5th Gear Member
 
tbirdscwd's Avatar
 
Join Date: Sep 2006
Location: CA
Posts: 4,039
Default

Unless you plan on a Kenne Bell, just go with the 78mm BBK throttle intake to save a bunch of money and you will get both in one unit. Upgrading the TB alone will not do much at all.

I loved my 4.10s with +425rwhp.
tbirdscwd is offline  
Old 09-29-2010, 03:59 PM
  #6  
k2xsnow
1st Gear Member
Thread Starter
 
k2xsnow's Avatar
 
Join Date: Aug 2009
Location: Michigan
Posts: 56
Default

well he said to go with the 70mm cuz 75 is too big. And your saying i WILL need a plenum for supercharged as well? or are you saying it will help? Or will i just replace it when i buy a supercharger...
k2xsnow is offline  
Old 09-29-2010, 03:59 PM
  #7  
PurpleIcedGT
6th Gear Member
 
PurpleIcedGT's Avatar
 
Join Date: Aug 2009
Location: New Jersey
Posts: 6,028
Default

Not everyone races up to 140 Kernsy!!!!!!!

Op - Stop worrying about three years out lol
PurpleIcedGT is offline  
Old 09-29-2010, 04:06 PM
  #8  
k2xsnow
1st Gear Member
Thread Starter
 
k2xsnow's Avatar
 
Join Date: Aug 2009
Location: Michigan
Posts: 56
Default

haha k im trying not too i just like doing stuff/buying stuff once.. which is why i research the crap outa everything before i get it. well im prob going with the accufab 75mm n plenum, it just looks so sexy, i know its like 100$ more..
k2xsnow is offline  
Old 09-29-2010, 04:11 PM
  #9  
tbirdscwd
5th Gear Member
 
tbirdscwd's Avatar
 
Join Date: Sep 2006
Location: CA
Posts: 4,039
Default

Originally Posted by k2xsnow
well he said to go with the 70mm cuz 75 is too big. And your saying i WILL need a plenum for supercharged as well? or are you saying it will help? Or will i just replace it when i buy a supercharger...
Neither a bigger TB or Plenum is "needed" in either case. A better plenum is a good idea no matter if you are forced induction or staying naturally aspirated though. A 75mm TB will not be too big. That is pure BS. The rest of your intake system will be 75mm or bigger. Having the same diameter TB will not hurt you at all.

I still stand by my statement that the BBK 78mm combo is the best deal for someone looking to get both a plenum and a throttle body.
tbirdscwd is offline  
Old 09-29-2010, 04:26 PM
  #10  
k2xsnow
1st Gear Member
Thread Starter
 
k2xsnow's Avatar
 
Join Date: Aug 2009
Location: Michigan
Posts: 56
Default

can i use the stock intake on the 78mm bbk tb n plenum? i dont want to have to buy a CAI
k2xsnow is offline  


Quick Reply: 75mm TB and plenum



All times are GMT -5. The time now is 09:20 PM.