70 mm 75 mm throttle body

mustang03GT · August 7th, 2007, 08:37 PM

I am currently looking at the Jlt cold air intake what is the best size throttle body and plenum acufab is what i was looking at. Is it true that 75 can hurt the performance of the car should i wait and just get cold air intake?

RyanGT · August 7th, 2007, 08:43 PM

If you plan on modding your car with fi or nitrous then get the 75. I made the mistake of getting the 70 then 500 miles later got a blower :p So yeah...
i think if you do cams and heads the 75mm would be better too... but dont quote me on it.

TheBusher · August 7th, 2007, 08:47 PM

Ya know, I've heard the same thing. Personaly I don't understand how a larger TB can hurt your performance. And if a larger TB really does hurt your performance, I don't see how a 5mm difference is gonna be that big of a deal. Now I can see the 75mm not being any more beneficial then the 70mm with minimal upgrades because your engine just won't be suckin' that much air, but to hurt perfromance... I have a hard time beleaving that.

If anyone can prove that it hurts performance, please educate me because I would love to know why it hurts your performance.

mustang03GT · August 7th, 2007, 08:47 PM

so if its gona be a slow upgrade process i should stick with the 70mm like i am planin on doin exhaust in winter thats about it for a while till i hit summer again.

mustang03GT · August 7th, 2007, 08:48 PM

its in the stick first modds i just wanted clarfity on the topic they say it can hurt u if you don't have cams

RC02GT · August 7th, 2007, 08:49 PM

If your not doing any engine work 75mm can actully hurt you or no gains at all, just not enough flow. some will tell you dont waster money on 70mm jsut get the 75, so your gonna have to decide that one.

TheBusher · August 7th, 2007, 08:50 PM

Originally Posted by mustang03GT

its in the stick first modds i just wanted clarfity on the topic they say it can hurt u if you don't have cams

I realize it says it in the sticky, but it still doesn't explain why. Just saying something doesn't make it true.

mustang03GT · August 7th, 2007, 08:54 PM

i understand that not everything that sticky says is 100 percent correct i just stating where i got the info about it hurting the performance

2000stangGT · August 7th, 2007, 09:21 PM

75

http://www.mustangforums.com/m_1080031/tm.htm

04GTAMPA · August 7th, 2007, 09:38 PM

75mm and get a plenum too.

acmillr · August 7th, 2007, 09:47 PM

Get the 75. I don't know where people get the information that it will hurt performance. It may not help performance, but it will not hurt you.

stanglifemike · August 7th, 2007, 10:58 PM

Definately get the 75 and get the Accufab plenum with it too. Nice combo!!

mustangmanic · August 7th, 2007, 11:23 PM

go to that link... i myself have a accufab 75mm tb and plenum but the running lean theory really does make perfect sense.

02StangGToWNEr · August 7th, 2007, 11:26 PM

AC is right! It won't hurt you at all. People that say that are just wording it wrong. They just mean that you won't benefit from it, because your cars not forcing enough air to utilize it's full performance poetential. So as far as harming your car, or it's engine etc, it won't. All it will do is sit there waiting for more upgrades, and it will take better to them. Plus it will save you on having to upgrade later on, especially if you plan on getting S/C, Turbo, or NOS.

CobraR · August 7th, 2007, 11:38 PM

75 is the way

acmillr · August 8th, 2007, 07:06 AM

Originally Posted by mustangmanic

go to that link... i myself have a accufab 75mm tb and plenum but the running lean theory really does make perfect sense.

No, it doesn't make sense. The guy who typed that does not understand how a computer measures and controls air/fuel. No matter how much air goes through the TB, it must come through the MAF first- which is what measures the air volume and determines the amount of fuel the engine will receive.

mustangmanic · August 8th, 2007, 09:55 AM

Originally Posted by acmillr

Originally Posted by mustangmanic

go to that link... i myself have a accufab 75mm tb and plenum but the running lean theory really does make perfect sense.

No, it doesn't make sense. The guy who typed that does not understand how a computer measures and controls air/fuel. No matter how much air goes through the TB, it must come through the MAF first- which is what measures the air volume and determines the amount of fuel the engine will receive.

Ah... yes, well that makes yet even more sense.

04GTAMPA · August 8th, 2007, 09:59 AM

Whatever dude, just get the 75mm and have fun with it.

Who gives a crap if the theory is true or not, or if that link sucks!

Lean, Rich.... Get a freaking tune!

mustang03GT · August 8th, 2007, 02:51 PM

thanks guys i will go with the 75mm and plenum with my jtl cold air that should help me when i get the long tubes and custom header back exhaust.

mystang0673 · August 10th, 2007, 12:29 AM

I know this may sound like a stupid question... but i just ordered the typhoon intake and tb kit off ebay. it didnt come with an upper plenum. would the stock one work or would it just restrict the flow back down?

August 7th, 2007, 08:37 PM	#1
mustang03GT Newbie Join Date: Jul 2007 Posts: 20	70 mm 75 mm throttle body I am currently looking at the Jlt cold air intake what is the best size throttle body and plenum acufab is what i was looking at. Is it true that 75 can hurt the performance of the car should i wait and just get cold air intake?

August 7th, 2007, 08:49 PM	#6
RC02GT Enthusiast 2002 Mustang GT Join Date: Sep 2006 Location: Baltimore, MD Posts: 967	If your not doing any engine work 75mm can actully hurt you or no gains at all, just not enough flow. some will tell you dont waster money on 70mm jsut get the 75, so your gonna have to decide that one. __________________ BBK CAI, BBK shortys, BBK x pipe, Flow's, MGW shifter

August 7th, 2007, 09:21 PM	#9
2000stangGT Enthusiast 2000 Mustang Gt 13.71 @ 102.01 Join Date: Jun 2006 Location: CT Posts: 748	75 http://www.mustangforums.com/m_1080031/tm.htm __________________ JLT - Accufab - MPH Heads - VT Stage 2 N/A cams Manley Valves/Springs - Centerforce Dual Friction BBK LT's - BBK o/r H - Bassani catback FRPP 4.10s - XCAL2 - BBK UDP's numbers october 13th

August 7th, 2007, 09:38 PM	#10
04GTAMPA Hardcore Enthusiast 1999 Mustang GT Join Date: Apr 2007 Location: Riverview, FL Posts: 2,260	75mm and get a plenum too. __________________

August 7th, 2007, 09:47 PM	#11
acmillr MM's Mad Scientist 2003 GT Street Fast 16.9@76MPH Join Date: Jul 2006 Location: Tampa, FL Posts: 4,041	Get the 75. I don't know where people get the information that it will hurt performance. It may not help performance, but it will not hurt you. __________________

August 7th, 2007, 08:43 PM	#2
RyanGT Enthusiast 2000 GT Join Date: Dec 2006 Location: Washington Posts: 897	If you plan on modding your car with fi or nitrous then get the 75. I made the mistake of getting the 70 then 500 miles later got a blower :p So yeah... i think if you do cams and heads the 75mm would be better too... but dont quote me on it.

August 7th, 2007, 08:47 PM	#3
TheBusher Hardcore Enthusiast 2002 Chevrolet Impala ??? Join Date: Jul 2007 Location: Englewood, Colorado Posts: 2,197	Ya know, I've heard the same thing. Personaly I don't understand how a larger TB can hurt your performance. And if a larger TB really does hurt your performance, I don't see how a 5mm difference is gonna be that big of a deal. Now I can see the 75mm not being any more beneficial then the 70mm with minimal upgrades because your engine just won't be suckin' that much air, but to hurt perfromance... I have a hard time beleaving that. If anyone can prove that it hurts performance, please educate me because I would love to know why it hurts your performance.

August 7th, 2007, 08:48 PM	#5
mustang03GT Newbie Join Date: Jul 2007 Posts: 20	its in the stick first modds i just wanted clarfity on the topic they say it can hurt u if you don't have cams

August 7th, 2007, 08:54 PM	#8
mustang03GT Newbie Join Date: Jul 2007 Posts: 20	i understand that not everything that sticky says is 100 percent correct i just stating where i got the info about it hurting the performance

August 7th, 2007, 10:58 PM	#12
stanglifemike MM Fanatic 06 GT & 98 GT Join Date: Dec 2006 Location: Douglasville, GA Posts: 3,265	Definately get the 75 and get the Accufab plenum with it too. Nice combo!! __________________ 98 GT: Accufab, Steeda, BBk, Mac, FlowMaster, Moser, Ford Racing, American Racing, Nitto DR's, Eibach, SCT, FPS 06 GT: JLT, SCT, FRPP/Borla, Pypes, Steeda, BamaChips, Deez Nutz RadMustangs Store

August 7th, 2007, 11:23 PM	#13
mustangmanic Hardcore Enthusiast 2002 Mustang GT 13.334 @ 106.57 Join Date: May 2007 Location: Indianapolis Posts: 2,567	go to that link... i myself have a accufab 75mm tb and plenum but the running lean theory really does make perfect sense. __________________ Accufab 75mm TB and Pleunm, JLT cai, Steeda Caster Chamber Plates, Eibach Sportline Springs, Tokico Shocks/Struts, FRPP Aluminum Driveshaft, FRPP 3.73's, Hooker LT's, Hooker O/R X, Pypes Violator Catback, SCT Xcal 2. 280rwhp 302.1rwtq

August 7th, 2007, 11:26 PM	#14
02StangGToWNEr Hardcore Enthusiast 2006 Mustang GT Join Date: Feb 2007 Location: Upstate NY Posts: 2,667	AC is right! It won't hurt you at all. People that say that are just wording it wrong. They just mean that you won't benefit from it, because your cars not forcing enough air to utilize it's full performance poetential. So as far as harming your car, or it's engine etc, it won't. All it will do is sit there waiting for more upgrades, and it will take better to them. Plus it will save you on having to upgrade later on, especially if you plan on getting S/C, Turbo, or NOS. __________________ *My Cardomain Page: http://www.cardomain.com/ride/3103321 My Myspace:* http://www.myspace.com/dabossofny

August 8th, 2007, 09:59 AM	#18
04GTAMPA Hardcore Enthusiast 1999 Mustang GT Join Date: Apr 2007 Location: Riverview, FL Posts: 2,260	Whatever dude, just get the 75mm and have fun with it. Who gives a crap if the theory is true or not, or if that link sucks! Lean, Rich.... Get a freaking tune! __________________

August 8th, 2007, 02:51 PM	#19
mustang03GT Newbie Join Date: Jul 2007 Posts: 20	thanks guys i will go with the 75mm and plenum with my jtl cold air that should help me when i get the long tubes and custom header back exhaust.

August 10th, 2007, 12:29 AM	#20
mystang0673 Hardcore Enthusiast 12.5@109 Join Date: Jan 2007 Posts: 1,480	I know this may sound like a stupid question... but i just ordered the typhoon intake and tb kit off ebay. it didnt come with an upper plenum. would the stock one work or would it just restrict the flow back down? __________________

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