Does anyone know the size of a stock throttle body - MustangForums.com


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

Reply
 
 
 
Thread Tools Search this Thread
Old 11-11-2008, 11:21 AM   #1
foru2nv4
2nd Gear Member
Thread Starter
 
Join Date: Oct 2007
Posts: 213
Default Does anyone know the size of a stock throttle body

Does anyone know the size of a stock throttle body on a 2003 Mustang GT 4.6 litre? I am curious of the size then I want to upgrade to a larger bbk throttle body because I have a twin screw supercharger on the car right now running the stock throttle body. Any suggestion on the size I should upgrade to would be also appreciated.


Thanks
foru2nv4 is offline   Reply With Quote
Old 11-11-2008, 11:37 AM   #2
cliffyk
TECH SAVANT
 
cliffyk's Avatar
 
Join Date: Dec 2006
Location: Saint Augustine, FL
Posts: 10,931
Default

Quote:
Originally Posted by foru2nv4 View Post
Does anyone know the size of a stock throttle body on a 2003 Mustang GT 4.6 litre? I am curious of the size then I want to upgrade to a larger bbk throttle body because I have a twin screw supercharger on the car right now running the stock throttle body. Any suggestion on the size I should upgrade to would be also appreciated.


Thanks
65 mm, upgrade to a 75 or BBKs new 78 mm TB/plenum combination--but don't expect a gigantic difference. It will be quite noticable but not huge...
cliffyk is offline   Reply With Quote
Old 11-11-2008, 11:49 AM   #3
foru2nv4
2nd Gear Member
Thread Starter
 
Join Date: Oct 2007
Posts: 213
Default Dont need the plenum

I don't need the plenum because I have a twin screw supercharger that sits ontop of the engine with a stock throttl body attached to the arm of the saleen series IV supercharger. So you say the stock size of a 2003 mustang gt throttle body is 65mm? I appreciate that I think a 75mm on this supercharger will be a big increase for air to the supercharger?





2003 Mustang GT
Saleen supercharger series IV, 4.10s, slp loudmouth exhaust, 30lb fuel injectors, saleen pcm programmed, mass air to 30lb injectors, cold air kit, 160 degree thermostat, 2.91 pulley for supercharger, smaller belt 112.5"
foru2nv4 is offline   Reply With Quote
Old 11-11-2008, 05:17 PM   #4
devore86
2nd Gear Member
 
devore86's Avatar
 
Join Date: Mar 2007
Location: Vienna, WV
Posts: 257
Default

Do u think the 78mm would be too much for my car, ive been lookin at it, its a good deal.........just not sure
devore86 is offline   Reply With Quote
Old 11-11-2008, 05:23 PM   #5
cliffyk
TECH SAVANT
 
cliffyk's Avatar
 
Join Date: Dec 2006
Location: Saint Augustine, FL
Posts: 10,931
Default

Quote:
Originally Posted by devore86 View Post
Do u think the 78mm would be too much for my car, ive been lookin at it, its a good deal.........just not sure
It won't hurt anything to any great degree (a slight decrease in charge velocity at WOT, that will hurt a bit at higher RPMs when the 2V heads don't breath so well), however as long as you run n/a it also won't do anything that a 70 mm TB (and aftermarket plenum) couldn't...
cliffyk is offline   Reply With Quote
Old 11-11-2008, 05:26 PM   #6
SilvrStang
6th Gear Member
 
SilvrStang's Avatar
 
Join Date: Apr 2006
Location: Las Vegas
Posts: 5,010
Default

Dude 75 or 78 mm is an overkill . Yes it will hurt the performance. Go with a 70mm its more then enough on an N/A 2 valve.
SilvrStang is offline   Reply With Quote
Old 11-11-2008, 05:26 PM   #7
devore86
2nd Gear Member
 
devore86's Avatar
 
Join Date: Mar 2007
Location: Vienna, WV
Posts: 257
Default

kinda what i figured, its always good to have a 2nd opinion though........thnx
devore86 is offline   Reply With Quote
Old 11-11-2008, 08:04 PM   #8
boduke0220
6th Gear Member
 
Join Date: Mar 2007
Location: Yadkin, Nc
Posts: 5,183
Default

Quote:
Originally Posted by SilvrStang View Post
Dude 75 or 78 mm is an overkill . Yes it will hurt the performance. Go with a 70mm its more then enough on an N/A 2 valve.
he is supercharged
boduke0220 is offline   Reply With Quote
Old 11-11-2008, 08:17 PM   #9
SilvrStang
6th Gear Member
 
SilvrStang's Avatar
 
Join Date: Apr 2006
Location: Las Vegas
Posts: 5,010
Default

Havent read that. N/A 70 MM

75MM would do the job for your twin screw setup.
SilvrStang is offline   Reply With Quote
Old 11-11-2008, 08:40 PM   #10
248spider
 
248spider's Avatar
 
Join Date: Apr 2008
Location: Michigan
Posts: 40
Default

Quote:
Originally Posted by SilvrStang View Post
Dude 75 or 78 mm is an overkill . Yes it will hurt the performance. Go with a 70mm its more then enough on an N/A 2 valve.
after reading your comments that u posted about not going with a 75mm tb, not to be a smart *** but i was looking at your bolt ons and your hp.compaired to what i put on i gained more rwhp from that.i have c&l plenum,bbk75mm tb,bbk cai,and tune by donnie walsh jr.i got 255 rwhp 300torque this was also at 92 degree temps w 30% humidity.i should also add that i have a cheapo pace setter h pipe,and 100,000 stock mufflers.
248spider is offline   Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
78mm throttle body on small CAI my96mustang New Member Area 2 08-24-2015 06:12 AM
Running lean 01blackgtconv New Member Area 9 08-14-2015 04:50 PM
Dirty Throttle Body? Idle / stalling issues stanngg 2005-2014 Mustangs 10 08-12-2015 03:43 PM
Need Help Diagnosing Have Codes (Confused) djbigskrilla 2005-2014 Mustangs 13 08-11-2015 12:59 PM
Running Lean 01blackgtconv 4.6L (1996-2004 Modular) Mustang 2 08-10-2015 01:25 PM


Tags
2000, 2004, 99, bbk, body, cai, fox, gt, mm, mustang, size, sizes, stock, throttle, v6

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

Forum Jump


All times are GMT -5. The time now is 07:27 AM.