Throttle body : 65mm vs 70mm vs 75mm

Slow5.0

Active Member

Feb 13, 2003

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Portland, OR

Jan 21, 2004

#1

• Jan 21, 2004

• #1

I wanna bought aftermarket TB but I don't know which one is better for my , 65 ,70 or 75mm , this year I have plan to put Cobra intake and maybe 94-95 Cobra heads (GT40s) and meybe 73 or 77mm MASS
So which one is better for me, some people said with bigger TB I gonna lose HP and het torque is that right

 

Venom351R

Founding Member

Apr 27, 2002

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MAINE

Jan 21, 2004

#2

• Jan 21, 2004

• #2

for the most part is is. If your going to stay N/A and not ad a turbo, Nitrous, or a supercharger then all you need is a 65MM, if you add a Power adder then you can go up to a 70MM. Dont worry about getting a 75, you wont need it unless you plan some radical sick combo.

 

red94fiveo

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Apr 12, 2003

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Wichita, KS

Jan 21, 2004

#3

• Jan 21, 2004

• #3

65mm is the biggest you need if you are staying N/A, and it would probably be enough even with a power adder on a 302. The thoery behind this is that too big of a throttle body kills velocity, which in turn kills horsepower.

 

Joes95GT

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Jan 23, 2003

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Delaware

Jan 22, 2004

#4

• Jan 22, 2004

• #4

The bigger throttle body kills torque, not horsepower. On a H/C/I car with all the bolt ons and a 65mm TB, it will have higher torque numbers and lower horsepower numbers than a car with a 70mm TB.

Joe

 

Slow5.0

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Feb 13, 2003

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Portland, OR

Jan 22, 2004

#5

• Jan 22, 2004

• #5

OK guys , any more comments

 

VibrantRedGT

"STANGNET'S PENGUIN SMACKER"

15 Year Member

Nov 29, 1999

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Boca Raton, Florida

Jan 22, 2004

#6

• Jan 22, 2004

• #6

No bigger than a 65MM. If you have blower or turbo planned then a 70MM. A 65MM is good to 600HP. Look at either BBK or FMS. FMS comes with the sensors though and is a top notch unit.

 

Big Jay

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Aug 4, 2003

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Tucson, Az.

Jan 22, 2004

#7

• Jan 22, 2004

• #7

65mm

 

red94fiveo

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Apr 12, 2003

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Wichita, KS

Jan 22, 2004

#8

• Jan 22, 2004

• #8

My FMS unit was a very high quality piece, I've heard of people having problems with some other brands.

 

jwalker

Founding Member

Aug 4, 2002

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millersville,pa

Jan 22, 2004

#9

• Jan 22, 2004

• #9

I have a 70 MM but if I did it again, Id buy a 65 MM.

 

GTJake

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Oct 28, 2002

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Ann Arbor, MI

Jan 22, 2004

#10

• Jan 22, 2004

• #10

jwalker said:

I have a 70 MM but if I did it again, Id buy a 65 MM.

Click to expand...

Why? You think it's hurting you or something? I really want to go to the track and try out the stock 60mm, then 65mm and a 70mm.

Jake

 

fiveotony

Founding Member

May 20, 2001

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Gainesville, Ga

Jan 22, 2004

#11

• Jan 22, 2004

• #11

My 65 was a great piece till it broke since then I bought a 70 MM tb from professional products Big Mistake this thing is doo doo compared to my old motorsport piece.

 

jwalker

Founding Member

Aug 4, 2002

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millersville,pa

Jan 24, 2004

#12

• Jan 24, 2004

• #12

GTJake said:

Why? You think it's hurting you or something? I really want to go to the track and try out the stock 60mm, then 65mm and a 70mm.

Jake

Click to expand...

I dont really Use NOS that much. I see the track maybe 5 times a year. I think that it does take away from my low end some. But I can say one thing: I never had problems with this TB. Its a BBK unit.