need info on throttle body's dont laugh

[crazyhorsegt]

ok i'm used to a 4.6 stang, i have modded my 95 gt some, mac c.a.i, u/d pulley's, o/r h - pipe, etc, i just dont know what the stock t/b is is it 50 or 55 mm, i orderd a 65 mm , am i gonna get any result's ??????? just dont know, my last 302 was a 69 model, which i still have, waiting to go in my 65 falcon, help a idiot please

 

[BULLITTSTANG95]

i switched mine to a 65mm and didn't really noticed anything. but i believe you would get more affect from it once you put on better flowing intake. i still have the stock intake on mine

 

[crazyhorsegt]

ok thank's, i have more mod's planned.

 

[super302]

I have a 65mm on my h/c/i 302, its a BBK, it came on the car when i bought it...i'm sure its holding me back some, but whatever!

 

[Grn92LX]

Stock is 60mm as is the stock intake opening. To see any kind of results you NEED to port match the opening. Putting a 65mm (or any size tb) on a 60mm opening creates a wall for air to hit disrupting flow. Match the tb to the inlet size of the manifold is what I preach. Need more TB than what the opening is, then break out the dremel.

 

[gt-351]

Most of the dyno books I have read showed a 65mm t/b out performed larger 70&75mm t/b on even 347 strokers.

 

[Grn92LX]

Most of the dyno books I have read showed a 65mm t/b out performed larger 70&75mm t/b on even 347 strokers.

Maybe on a pathetic 347 with stock heads or some kind of junk like that a 65 would perform similar to a 70/75, but on a REAL 347 the only place a 65mm belongs is in the trash can or recycling bin Plenty of guys gaining power with larger tb's on 302's as well.

 

[91LX_5L]

I got a 70mm its too big im sure. But oh well.

 

[red ink]

Im too lazy to find the thread but i could swore the 65mm Tb supports 600hp. Thats a pretty healthy 347

 

[rgs]

whats the opening on gt-40 intake manifolds?
cause i got one and got a 65mm tb?
is everything matched up?

 

[Grn92LX]

GT40 and cobra manifolds have a 70mm opening. Your fine with what you have.

 

[jonesy]

unless you are going to add a power adder, turbo, super charger or NOS the 65mm is more than adequate

 

[CivicEater]

Im too lazy to find the thread but i could swore the 65mm Tb supports 600hp. Thats a pretty healthy 347

If this is true then wouldnt our 60mm TB's be good to like 450 or someting much higher than any of our NA 302 combos are making?

 

[WhiteDevil]

unless you are going to add a power adder, turbo, super charger or NOS the 65mm is more than adequate

Bull Crap people bull crap. Firstly my 65mm was not more than adequete with my current combo I got dynoed with the 65mm then later dynoed without my 65mm i lost 9rwhp and 10rwtq, i thought i barely even needed the 65mm shouldnt be that much of a drop right Also while datalogging with my Tweecer i found that i peaked around 912kg/hr peak air flow while at WOT. With my new 75mm throttle body and edlbow i now get a whopping 930kg/hr on average and about 8kg/hr more throught the whole curve. But i guess solid numbers are never really adequte info.

 

[red ink]

I was just saying what i read in another thread on here or the corral. Mabey some of the info on here is inaccurate, but thanks for the heads up. I will prolly buy a 75 if it made that big of a difference on yr combo.

 

[crazyhorsegt]

Stock is 60mm as is the stock intake opening. To see any kind of results you NEED to port match the opening. Putting a 65mm (or any size tb) on a 60mm opening creates a wall for air to hit disrupting flow. Match the tb to the inlet size of the manifold is what I preach. Need more TB than what the opening is, then break out the dremel.

thank's that's what i needed to know, i appreciate all the info guy's.