TB and Intake PLenum questions

[StompinR1]

I just bought a 01 GT about a month ago and I believe all it has is a bbk cold air intake. I was thinking about getting the 75mm or 80mm throttle bodies for it but I don't know what will fit with my stock setup. What MM should I get and also what other things do I need if I get that? like plenum, spacers comp chip etc. I am new to mustangs and am not very engine smart...

I saw some ford racing ones and mac ones on the pep boys website, are those good?

 

[StompinR1]

oh yeah btw will this even do anything on a stock setup? or is it pointless without a SC or whatever?

 

[Tylerb59]

You might be better off porting your stock TB, but if you want to spend the money the 75mm Accufab was dyno tested for about ~6RWHP.

 

[StompinR1]

will it fit on my stock setup and bbk C.A.I.?

 

[flipnsac]

will it fit on my stock setup and bbk C.A.I.?

YES!

 

[StompinR1]

Thanks!

 

[rob1]

I may be incorrect here but on a stock set up you should only need a 70mm not 75 or bigger.

 

[stimmler]

go to modulardepot.com to see Matt's comparo of different TB and plenums. I chose a 70mm tb because at low rpm with minimal mods you can loose some low end torque. But with the 70mm tb and accufab plenum there is a net positive increase in hp and trq along the entire curve. If you only add a tb without a plenum you will have a net loss at the very bottom. I belive the bbk cai will accept the 75mm tb. I have mine with the stock inlet tubing now, as I don't like metal cai's due to heat. I may get a densecharger at some point in time. Spacers are crap.

 

[01mgvert]

I bought the Accufab combination, but went with 75 mm. It is true that the 70 mm combination gained 1.62 more hp on a stock GT but I don't plan to stay stock. For inlet pipes, I went with the C & L TrueFlow pipe. There was a definate SOTP improvement over the stock corrugated tube. I check it for heat all the time and it always feels cool. The cast aluminum must really resist the heat.

 

[KaPPaBaLL]

go to modulardepot.com to see Matt's comparo of different TB and plenums. I chose a 70mm tb because at low rpm with minimal mods you can loose some low end torque. But with the 70mm tb and accufab plenum there is a net positive increase in hp and trq along the entire curve. If you only add a tb without a plenum you will have a net loss at the very bottom. I belive the bbk cai will accept the 75mm tb. I have mine with the stock inlet tubing now, as I don't like metal cai's due to heat. I may get a densecharger at some point in time. Spacers are crap.

only half way decent post i've seen in this thread.

original poster:

you better not get that 75mm TB without getting an aftermarket upper intake manifold (plenum). Putting a 75mm TB on a stock setup lowers intake velocity of air coming in the intake manifold thus resulting in loss of power.