hello

i have a 1981 vette with 450hp and have 2 questions.

 

1. i need new breake(calipers and rotors because my acdelco are bad all the time) what or which do you advice.(i have 18"wheels)?

2. at the moment i have a TH400 transmission, do you think the TH700R4 is better?

thx for your help(S)

mini

1. What is the overall hieght of the tires?

2. What gears do you have in the rear?

3. How many rpms do you see at 70mph?

hi thx for answer

the wheels dim is the same as you have 15" with 55tires

3gear

i do not know not high

If it were me and I had to do a 4-wheel break job, and if I had the money, I would go with a good after market break job like Wilwood or US Brake, bigger rotors and calipers, when you add larger wheels and tires even though outside dia. might be the same as your stock wheel and tire you sometimes change the dynamic's and rolling mass of the car needing an upgraded breaking sys., remember you want to be able to stop as good as you accelerate.

I agree, if you have the money and are running larger rims and need brakes upgrade.  SSBC has a kit for large diameter wheels as does wilwood, Van Steel, and VBP.

This is probably the reason you are wearing out the AC brakes and rotors.

As far as the transmission goes it all depends on gear ratio and other modifications.  Overall the th400 is a great transmission that can withstand a lot of HP.