throttle body size

electricblue87 · December 13th, 2009, 06:21 PM

I Have A 87 Gt With The Following Mods-cobra Cam,1.72 Rockers,gt40p Heads(ported) Gt40 Intake,1 5/8 Stortys,2 1/2 Flowmaster Exhause No Cats,underdrive Pulleys,southside Bars,3.55s With A Auburn Posi, I Never Upgraded The Throttle Body What Size Would Be Best?also Thinking Of Adding A Small Nitrous Kit With The Stock Bottom End I Was Thinking 125 Hp Max Does That Sound Like Too Much?

2stangs8689 · December 13th, 2009, 09:46 PM

I would say a 65mm would be sufficient for the mods you listed, a 70 will give you a little more up top, but low rpm performance may suffer a little too much to make it worth it.

As far as the nitrous shot goes, buy a kit that will let you start with a smaller shot, and take the time to learn how to tune it, making the most of the gain you see, and go up from there.

A well tuned 75 shot to start may be a bigger gain than a 125 shot that is too rich, giving you the same effect as a tuned 75.

strictly6racing · December 13th, 2009, 10:17 PM

agreed. a 65mm should be a great choice for the mods you listed. i would start small with the shot and work you way up to a 125. please tell me its a wet kit!?

electricblue87 · December 13th, 2009, 10:29 PM

I Have Not Purchased The Juice Yet But The Wet Kit Is What I Have Been Thinking About Buying.which Brand Would You Guys Suggest?

93hatch · December 13th, 2009, 10:43 PM

70mm since thats the opening on the gt40 intake if i remember right.

2stangs8689 · December 13th, 2009, 11:11 PM

Nitrous Express Kits are rated as gains to the tire, where as others are rated at the motor. My friend saw nice gains going to the Express.

flyin ryan · December 13th, 2009, 11:41 PM

why go smaller then what the inlet port on the intake is? i'd go with the 70mm to match it

89notch306 · December 15th, 2009, 08:37 PM

i myself am wondering bout the throttle body. swaping my motor into a new car and noticed i only have a stock throttle body on my car but also have a bbk 70mm on the side. am i able to just swap that out? or is some sort of tuning involved?

flyin ryan · December 15th, 2009, 09:50 PM

just swap it out... there's not a big enough gain/difference to effect the tune.

December 13th, 2009, 06:21 PM	#1
electricblue87 Newbie 87 MUSTANG GT 12.87@107 Join Date: Dec 2009 Location: NEW YORK Posts: 42 iTrader: 0 reviews	throttle body size I Have A 87 Gt With The Following Mods-cobra Cam,1.72 Rockers,gt40p Heads(ported) Gt40 Intake,1 5/8 Stortys,2 1/2 Flowmaster Exhause No Cats,underdrive Pulleys,southside Bars,3.55s With A Auburn Posi, I Never Upgraded The Throttle Body What Size Would Be Best?also Thinking Of Adding A Small Nitrous Kit With The Stock Bottom End I Was Thinking 125 Hp Max Does That Sound Like Too Much?

December 13th, 2009, 09:46 PM	#2
2stangs8689 Newbie 1990 Turbo LX 8.75@154 Join Date: Dec 2009 Location: Lockport, NY Posts: 25 iTrader: 0 reviews	I would say a 65mm would be sufficient for the mods you listed, a 70 will give you a little more up top, but low rpm performance may suffer a little too much to make it worth it. As far as the nitrous shot goes, buy a kit that will let you start with a smaller shot, and take the time to learn how to tune it, making the most of the gain you see, and go up from there. A well tuned 75 shot to start may be a bigger gain than a 125 shot that is too rich, giving you the same effect as a tuned 75. __________________ 1990 Turbo LX 8.75@154 1991 LX Notch

December 13th, 2009, 10:17 PM	#3
strictly6racing Newbie 2001 Mustang 4.3 V6 Join Date: Oct 2009 Location: Texas Posts: 10 iTrader: 0 reviews	agreed. a 65mm should be a great choice for the mods you listed. i would start small with the shot and work you way up to a 125. please tell me its a wet kit!? __________________ 2001 v6---R.I.P. 479hp and 530tq with 15 psi and N2O http://www.cardomain.com/ride/3119170 88 mustang 5.0---build underway http://www.cardomain.com/ride/3806455

December 13th, 2009, 10:43 PM	#5
93hatch Banned 1992 Lx 11.39@119.24 Join Date: Jan 2008 Location: Az Posts: 11,644 iTrader: 0 reviews	70mm since thats the opening on the gt40 intake if i remember right. __________________ [QUOTE=93mustank;2577445]We speed tested my right arm for quickness in shifts... So he could design the cam for proper shift recovery.[/QUOTE]

December 13th, 2009, 11:11 PM	#6
2stangs8689 Newbie 1990 Turbo LX 8.75@154 Join Date: Dec 2009 Location: Lockport, NY Posts: 25 iTrader: 0 reviews	Nitrous Express Kits are rated as gains to the tire, where as others are rated at the motor. My friend saw nice gains going to the Express. __________________ 1990 Turbo LX 8.75@154 1991 LX Notch

December 13th, 2009, 10:29 PM	#4
electricblue87 Newbie 87 MUSTANG GT 12.87@107 Join Date: Dec 2009 Location: NEW YORK Posts: 42 iTrader: 0 reviews	I Have Not Purchased The Juice Yet But The Wet Kit Is What I Have Been Thinking About Buying.which Brand Would You Guys Suggest?

December 13th, 2009, 11:41 PM	#7
flyin ryan Banned Join Date: Jun 2008 Posts: 3,387 iTrader: 0 reviews	why go smaller then what the inlet port on the intake is? i'd go with the 70mm to match it

December 15th, 2009, 08:37 PM	#8
89notch306 Newbie 1989 mustang LX Join Date: Dec 2009 Location: New York Posts: 12 iTrader: 0 reviews	i myself am wondering bout the throttle body. swaping my motor into a new car and noticed i only have a stock throttle body on my car but also have a bbk 70mm on the side. am i able to just swap that out? or is some sort of tuning involved? __________________ 89 lx 306 93 lx 302 (work in progress) 04 gsxr 1000

December 15th, 2009, 09:50 PM	#9
flyin ryan Banned Join Date: Jun 2008 Posts: 3,387 iTrader: 0 reviews	just swap it out... there's not a big enough gain/difference to effect the tune.

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