stevemilz

iTrader: (3)

IM JUST THROWING NUMBERS AROUND JUST TRYING TO UNDERSTAND SOMETHING.


Example:You have a 28" tire with 4.56 gears and you run 1.3x's 60ft's 10.2x's@130 roughly your RPM through the traps is 7,400.

Now...You change to a 30" tire with 4.88 gears, what happens?

Do you 60ft better?

Will your ET drop?

Would you run the same?

calongo_SS

iTrader: (7)

The only real difference I think you would see is a slight loss in performance from the added weight.

Red01Chevy

it would depend on what kind of tire or are you having trouble hooking now
30" are you planning on going to radials?cause that will drop your rpms also

stevemilz

iTrader: (3)

Im not that great at explaining things.......

http://www.f-body.org/gears/

TH400
2.48 1st
1.48 2nd
1.00 3rd

28" Tire/4.56 Gear
6,700rpm 122mph
6,800rpm 124mph
6,900rpm 126mph
7,000rpm 128mph
7,100rpm 130mph
7,200rpm 132mph
7,300rpm 133mph
7,400rpm 135mph
7,500rpm 137mph
6,700rpm 122mph
6,800rpm 124mph
6,900rpm 126mph
7,000rpm 128mph
7,100rpm 130mph
7,200rpm 132mph
7,300rpm 133mph
7,400rpm 135mph
7,500rpm 137mph

30" Tire/4.88 Gear
6,700rpm 123mph
6,800rpm 124mph
6,900rpm 126mph
7,000rpm 128mph
7,100rpm 130mph
7,200rpm 132mph
7,300rpm 134mph
7,400rpm 135mph
7,500rpm 137mph
6,700rpm 122mph
6,800rpm 124mph
6,900rpm 126mph
7,000rpm 128mph
7,100rpm 130mph
7,200rpm 132mph
7,300rpm 134mph
7,400rpm 135mph
7,500rpm 137mph

On paper it looks exactly the same

calongo_SS

iTrader: (7)

That's why I'm thinking the only real difference will be the added weight of the bigger tires.

Red01Chevy

you cant go by that exactly it will depend on conveter and if he is switching from slick to radial or what not a regular slick will grow where a radial will not
and id be willing to bet that radials WILL be quicker and faster

stevemilz

iTrader: (3)

I think I have enough tire 28x10.5W, Im just trying to figure out if there is any benifit going to a 315/60/15 radial with a 4.88...besides saying you have a 315/60/15 on your car.

I like my car low.....