What T/B & Plenum for a stock GT?
- Thread starter 00BlackBeautyGT
- Start date
How is the idle? Does upgrading the T/B & plenum make the car idle different than stock. Right now my car idles like it's still new & it's a 2000. Drove a friend 03 GT that he just bought the other day & feels like mines. Don't want to lose that smooth idle.
I really want a 75mm & it's not really that much more than a 70mm. I don't really know if I plan on a supercharger or not later in the future. If I go with the 75mm, will it hurt performance if I don't supercharge the motor.
Yeah, but wouldn't that hurt performance?1990StangLX said:nope it just means you'll flow that much more air into your engine.
Fast Eddie 2k1
Founding Member
My car idles as good or better than stock. But I had more than tb/plenum done.00BlackBeautyGT said:
hognutz
New Member
someone really need to make a sticky about this tb issue. throttle body size when adding a new plenum is really related to which plenum you buy. ther is no rule of thumb.
If you think the 70mm tb and the c&l will work better you would be wrong. If you spend the extra money for a 75mm for an accufab you wasted you money.
as far as Idle I noticed nothing diffenet.
there is a lot of miss information that gets spread about tb size because a tb without a plenum upgrade does not do anything. so people think that will apply when you replace the plenum and they are wrong. you bolt a 75mm on you stocker and you wasted you money. with tons of mods a 70mm maybe would give you 2 hp.
the bottom line it is all about the combo. there are no blanket statement about which tb is best. it depends on what you are bolting that tb to.
also something to consider. this is not the first mod I would do to a car. open up your exhaust or put some cams in first. once the car needs more air then start to bring more in. I was going to get my cams first but I stumbled across a steal on ebay I could not pass up.
If you think the 70mm tb and the c&l will work better you would be wrong. If you spend the extra money for a 75mm for an accufab you wasted you money.
as far as Idle I noticed nothing diffenet.
there is a lot of miss information that gets spread about tb size because a tb without a plenum upgrade does not do anything. so people think that will apply when you replace the plenum and they are wrong. you bolt a 75mm on you stocker and you wasted you money. with tons of mods a 70mm maybe would give you 2 hp.
the bottom line it is all about the combo. there are no blanket statement about which tb is best. it depends on what you are bolting that tb to.
also something to consider. this is not the first mod I would do to a car. open up your exhaust or put some cams in first. once the car needs more air then start to bring more in. I was going to get my cams first but I stumbled across a steal on ebay I could not pass up.
What's the deal with everyone that is saying that they lose low end power with a bigger T/B. I don't understand. Is it noticeable?1990StangLX said:more air is better
if you have any doubts, just stick with the 70mm TB, i am sure you'll be very happy with it. it flows plenty of air for an N/A car
People say they lose end end power with X-pipes. I just had mines installed with a Magnaflow Tru-X & feels like I gained low end power. What's the theory behind the T/B.
todd4566
Founding Member
00BlackBeautyGT said:
I just posted about this issue today. Yeah, you will feel some loss of low end torque with a 70-75mm throttle body. I noticed the loss occurs from around 2000-2800. After that it's smooth sailing. I still haven't determined which I like better, but I will say a full 1st gear pull seems to be better with the 70.
