75mm BBK

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Ar_sn95

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Dec 22, 2004

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Dec 23, 2004

#1

• Dec 23, 2004

• #1

I have a 95 gt and I got a great deal on a 75mm t/b but I only have a few mods done. I have been told this is way to big but I was wondering how it would affect my car and its performance

 

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fiveo'cobra

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Oct 7, 2004

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SC

Dec 23, 2004

#2

• Dec 23, 2004

• #2

Well to give you some background before i start dropping facts on you, the general rule with throttle bodies is:

1)65mm if you're planning to stay NA with a bolt on car.
2)70mm or higher if you plan on boosting it. from there on out it really depends on what size charger or turbo you are running.

Some guys have bought 70 mm TB's on basically stock bolt on cars and have noticed increased power AND torque. Others have noticed a loss in torque. It really depends on what kind of ohter intake mods you have done to your car as well as better breathing intakes and heads. All are factors.

The opening on the intake manifold is 70 mm in diameter so the air has a nice clean striaght through flow. Even though this might still be a little big depending on mods, its not overkill and may work well.

As far as your TB, i am sorry to tell you, but its wayyyyyyyyy too big. A 75 mm on a basically stock car will probably gain you a few whp but it will lose a good amount of torque. I say sell it and look for either a 70 or 65.

 

hillie16

Founding Member

Nov 29, 1999

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Dec 23, 2004

#3

• Dec 23, 2004

• #3

I agree that 75 is a lot more than you need, I wouldn't go higher than 70 unless you're boosting.

 

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Darkhorse845

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Nov 17, 2004

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Dec 23, 2004

#4

• Dec 23, 2004

• #4

Yes the 70mm T/B will work fine.
Welcome to the boards!

 

Grn92LX

Fidanza Man!

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Jan 14, 2001

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Dec 23, 2004

#5

• Dec 23, 2004

• #5

Nice avatar, Hillie! \m/

What mods do you have? I wouldnt put a 75mm tb on a stock engine manily because the stock inlet is too small for it to make any power. You put that 75mm tb on now and since its way bigger than the stock inlet opening it'll create a wall that the air is gonna hit. Keep the tb and when you do an intake manifold or heads and an intake manifold then install it.

 

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Ar_sn95

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Dec 22, 2004

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Dec 23, 2004

#6

• Dec 23, 2004

• #6

Thanks for all the help guys looks like I am going with 70

 

M

mackey

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Jan 25, 2003

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Dec 23, 2004

#7

• Dec 23, 2004

• #7

Where did you get the deal on the 75mm. I am looking for one at a good price for my H/C/I car.

On, your topic. If you have minimal mods done. I wouldn't get any throttlebody, I would go for another mod first.

 

Black95GTS

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Jan 8, 2004

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Dec 23, 2004

#8

• Dec 23, 2004

• #8

Grn92LX said:

Nice avatar, Hillie! \m/

What mods do you have? I wouldnt put a 75mm tb on a stock engine manily because the stock inlet is too small for it to make any power. You put that 75mm tb on now and since its way bigger than the stock inlet opening it'll create a wall that the air is gonna hit. Keep the tb and when you do an intake manifold or heads and an intake manifold then install it.

Click to expand...

Exactly right. The only rule of thumb I follow is the biggest one that you can stick on your manifold! Makes sense if your manifold can only except 70mm to go with 70mm tops. Unless you want to get creative with a dremel....

 

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Ar_sn95

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Dec 22, 2004

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Dec 23, 2004

#9

• Dec 23, 2004

• #9

I found it in ebay

 

Crunked-A-Stang

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Dec 23, 2004

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Dec 23, 2004

#10

• Dec 23, 2004

• #10

I read a guy ran a 80mm and went 11's..i am getting the 80..bigger=more air flopw

 

Soupy

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Nov 23, 2004

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Dec 23, 2004

#11

• Dec 23, 2004

• #11

Crunked-A-Stang said:

I read a guy ran a 80mm and went 11's..i am getting the 80..bigger=more air flopw

Click to expand...

 

Crunked-A-Stang

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Dec 23, 2004

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Dec 23, 2004

#12

• Dec 23, 2004

• #12

Hey i see u run a Victor..why the overkill?