70mm or 75mm TB?

04GTMikey · 12-05-2004, 08:47 AM

I'm running a n/a '04 GT that i do not plan on supercharging. Should I go with the 70mm TB or will i see any difference in gain moving up to 75mm on n/a? Also need recommends on which you guys feel is the best TB.

I have K&N FIPK, C&L Plenum and very soon the SLP cat-back (just ordered from MT).

Chopper · 12-05-2004, 09:01 AM

I just ordered a 75mm.TB and plenum combo from Accufab.They are quite a bit more expensive than other combinations but are polished from the factory.This will help out in car shows only,no advantage at the track.About S/C 'ing,never say never.

*madmatt* · 12-05-2004, 09:18 AM

Get the 75mm. It will work better with the C&L plenum. Should be worth 1 or 2 more hp(like youd really notice) but C&L suggests a 75mm tb. Good luck.
Matt

03BullittClone · 12-23-2004, 08:39 AM

Quote:

Originally Posted by 04GTMikey

I'm running a n/a '04 GT that i do not plan on supercharging. Should I go with the 70mm TB or will i see any difference in gain moving up to 75mm on n/a? Also need recommends on which you guys feel is the best TB.

I have K&N FIPK, C&L Plenum and very soon the SLP cat-back (just ordered from MT).

If you are not planning on supercharging your 'Stang, or changing heads or cams, the 75mm TB is WAY overkill. You'll never get to take appropriate advantage of the increased flow the 75 allows. Get the 70mm TB, and currently Accufab is generally considered to be making a superior product. :thumbsup:

gtnumber2 · 12-23-2004, 08:42 AM

definitly accufab intake and a 75mm t/b. the accufab performs better and looks 10 times better.

svtnos · 12-23-2004, 11:35 AM

best combo u can buy for a n/a 4.6 motor is the accufab polished 75mm tb and their polished intake plenum.. showed the most gain of power throughout the power band..and like it has been said looks bad ass as well.. i don't know were u get this overkill stuff...

03BullittClone · 12-23-2004, 05:22 PM

Well, as my wife will tell you, I CAN be wrong. I'm basing my comments from a conversation I had with a guy waiting in the staging lanes at my local drag strip this year. He was confident that he bought too much throttle body when he put on a 75mm Accufab on his basically stock 4.6. It kinda made sense to me, that with the restrictions in the valve train and all, that it was too much TB. But, obviously, the research doesn't bear out his experience. 75mm it is! :headbang:

2000 STEEDA · 12-23-2004, 05:54 PM

I can attest that 75mm is too large for a moderately built 4.6. My motor is a little more than "moderately" built and the 75mm Ford Racing TB on my horse is still a little too big for normal driving around. Works fine under WOT though.

NoKturnaL · 12-23-2004, 06:11 PM

MOST say to use the 70mm TB if you stay NA. WHY? I never got a answer that really makes sense. SO Does anyone know "WHY" its best to use a 70mm TB if you are N/A??? :happy7:

mike sweeney · 12-23-2004, 09:38 PM

70 mm t-bodies work better than 75 mm on mildly modded GT's. Your low and midrange power will be better and the car will idle more smoothly. I am waiting untill I see some of these 4.6 intakes before I buy a plenum and t-body. Hopefully we will see them soon I am getting tired of waiting.

Merry Christmas every body!!!

ccasion1

SLVR04GT · 12-23-2004, 09:48 PM

So...basically, you need more power, or mods for the bigger TB. So for a mustang with X pipe, 3.73, catback, pullies, T/A, and plenum the 70 should be large enough? Will the 75 cause a loss in power or not getting the optimal power??

svtnos · 12-24-2004, 08:19 AM

well hell if u feel that way come over and i'll have my bro take u for a ride in his 01 GT motor equiped 98 GT with the plenum and 75tb.. it did nothign but make the car faster by alot but then again it doesa have LT prochamber and cat back...this a real world provin... so this is were i got my opinions on this ..lol

mike sweeney · 12-24-2004, 08:58 AM

Nobody is saying you will loose power with the 75mm set-up, but you might gain more with a 70mm.

SLVR04GT · 12-25-2004, 10:31 AM

Hey mike, you have any pics of your car? I think ours are going to look alot alike except mine is silver.

03BullittClone · 12-29-2004, 07:42 AM

Quote:

Originally Posted by 2000 STEEDA

I can attest that 75mm is too large for a moderately built 4.6. My motor is a little more than "moderately" built and the 75mm Ford Racing TB on my horse is still a little too big for normal driving around. Works fine under WOT though.

Like I said earlier, 70mm TB it is! :headbang:

mike sweeney · 12-29-2004, 07:23 PM

Quote:

Originally Posted by SLVR04GT

Hey mike, you have any pics of your car? I think ours are going to look alot alike except mine is silver.

Here it is in the garage

mike sweeney · 12-29-2004, 07:25 PM

Quote:

Originally Posted by SLVR04GT

Hey mike, you have any pics of your car? I think ours are going to look alot alike except mine is silver.

Here it is in storage

12-05-2004, 08:47 AM	#1 (permalink)
04GTMikey Stang Maniac Join Date: Dec 2004 Location: Dallas, TX Posts: 170	70mm or 75mm TB? I'm running a n/a '04 GT that i do not plan on supercharging. Should I go with the 70mm TB or will i see any difference in gain moving up to 75mm on n/a? Also need recommends on which you guys feel is the best TB. I have K&N FIPK, C&L Plenum and very soon the SLP cat-back (just ordered from MT).

12-05-2004, 09:01 AM	#2 (permalink)
Chopper Senior Member Join Date: Dec 2004 Location: Parkersburg Wv. Posts: 257	I just ordered a 75mm.TB and plenum combo from Accufab.They are quite a bit more expensive than other combinations but are polished from the factory.This will help out in car shows only,no advantage at the track.About S/C 'ing,never say never. __________________ 04 Mustang GT M5,1200 H-D Sportster Street Legal Drag Bike.1942 Flathead Chopper.1960 Cessna 172.(yes it's been modded too) BUY AMERICAN!!!

12-05-2004, 09:18 AM	#3 (permalink)
madmatt Traitor...lol Join Date: Sep 2004 Location: Lexington, SC Posts: 7,911	Get the 75mm. It will work better with the C&L plenum. Should be worth 1 or 2 more hp(like youd really notice) but C&L suggests a 75mm tb. Good luck. Matt __________________ RPMPlanets

12-23-2004, 11:35 AM	#6 (permalink)
svtnos tranny killer Join Date: Dec 2004 Location: Clinton Twp. MI Posts: 142	best combo u can buy for a n/a 4.6 motor is the accufab polished 75mm tb and their polished intake plenum.. showed the most gain of power throughout the power band..and like it has been said looks bad ass as well.. i don't know were u get this overkill stuff... __________________ http://www.cardomain.com/ride/503778

12-23-2004, 05:22 PM	#7 (permalink)
03BullittClone Switching Gears.... Join Date: Sep 2004 Location: Suburban Chicago Posts: 215	Overkill Well, as my wife will tell you, I CAN be wrong. I'm basing my comments from a conversation I had with a guy waiting in the staging lanes at my local drag strip this year. He was confident that he bought too much throttle body when he put on a 75mm Accufab on his basically stock 4.6. It kinda made sense to me, that with the restrictions in the valve train and all, that it was too much TB. But, obviously, the research doesn't bear out his experience. 75mm it is! :headbang: __________________ Looking REAL Hard at an '06 Shelby!!!

12-23-2004, 08:42 AM	#5 (permalink)
gtnumber2 Senior Member Join Date: Dec 2004 Posts: 289	definitly accufab intake and a 75mm t/b. the accufab performs better and looks 10 times better.

12-23-2004, 05:54 PM	#8 (permalink)
2000 STEEDA Senior Member Join Date: Sep 2004 Location: Baton Rouge Posts: 326	I can attest that 75mm is too large for a moderately built 4.6. My motor is a little more than "moderately" built and the 75mm Ford Racing TB on my horse is still a little too big for normal driving around. Works fine under WOT though.

12-23-2004, 06:11 PM	#9 (permalink)
NoKturnaL MustangTuning 5-oh Join Date: Dec 2004 Location: Peabody, MA Posts: 1,948	MOST say to use the 70mm TB if you stay NA. WHY? I never got a answer that really makes sense. SO Does anyone know "WHY" its best to use a 70mm TB if you are N/A??? :happy7: __________________ 2002 Mustang GT Coupe 5-Speed Performance K&N Intake Accufab upper Intake Plenum Accufab 70mm Throttle Body Steeda Pullies SCT 4-Bank Chip Dyno Tuned Mac H-pipe Flowmaster Cat-Back Steeda Shifter Centerforce Clutch SLP-Line-Lock And more upgrades visually

12-23-2004, 09:38 PM	#10 (permalink)
mike sweeney Senior Gear Banger Join Date: Sep 2004 Location: Two Harbors, MN. Posts: 230	70 mm t-bodies work better than 75 mm on mildly modded GT's. Your low and midrange power will be better and the car will idle more smoothly. I am waiting untill I see some of these 4.6 intakes before I buy a plenum and t-body. Hopefully we will see them soon I am getting tired of waiting. Merry Christmas every body!!! ccasion1 __________________ 2004 Torch Red GT Flowmaster Am.Thunder cat back, SLP Mid Pipe Steeda Underdrive pulleys 3.73 gears Diablosport Predator tune Grille Delete and Mach 1 spoiler Rear Wing delete Mustang Tuning Shifter Bullitt Handling Kit

12-23-2004, 09:48 PM	#11 (permalink)
SLVR04GT Member Join Date: Dec 2004 Posts: 78	So...basically, you need more power, or mods for the bigger TB. So for a mustang with X pipe, 3.73, catback, pullies, T/A, and plenum the 70 should be large enough? Will the 75 cause a loss in power or not getting the optimal power??

12-24-2004, 08:19 AM	#12 (permalink)
svtnos tranny killer Join Date: Dec 2004 Location: Clinton Twp. MI Posts: 142	well hell if u feel that way come over and i'll have my bro take u for a ride in his 01 GT motor equiped 98 GT with the plenum and 75tb.. it did nothign but make the car faster by alot but then again it doesa have LT prochamber and cat back...this a real world provin... so this is were i got my opinions on this ..lol __________________ http://www.cardomain.com/ride/503778

12-24-2004, 08:58 AM	#13 (permalink)
mike sweeney Senior Gear Banger Join Date: Sep 2004 Location: Two Harbors, MN. Posts: 230	Nobody is saying you will loose power with the 75mm set-up, but you might gain more with a 70mm. __________________ 2004 Torch Red GT Flowmaster Am.Thunder cat back, SLP Mid Pipe Steeda Underdrive pulleys 3.73 gears Diablosport Predator tune Grille Delete and Mach 1 spoiler Rear Wing delete Mustang Tuning Shifter Bullitt Handling Kit

12-25-2004, 10:31 AM	#14 (permalink)
SLVR04GT Member Join Date: Dec 2004 Posts: 78	Hey mike, you have any pics of your car? I think ours are going to look alot alike except mine is silver.

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