Turboswede

iTrader: (1)

I will buy a t56 magnum from American Powertrain for my project that will be used allround = street,track,drag and just play with.

But I donīt realy know what of the ratios that would be best for me of this 2.

First one is this.
1 2.66
2 1.78
3 1.30
4 1.00
5 0.80
6 0.64

The second one is.
1 2.97
2 2.10
3 1.46
4 1.00
5 0.76
6 0.50

Please need som advice.

Project GatTagO

iTrader: (7)

What kind of car and what kind of HP?

Andrew

Turboswede

iTrader: (1)

Itīs in a nissan sportscar I will use a std lm7 engine first with about 280-300hp and put a turbo in later for about 700-800hp

Project GatTagO

iTrader: (7)

Well, if you were going to keep it NA, I would recommend the wide ratio. Since you are planning a turbo in the future, the close ratio will work better. With that much power, 2.97 1st gear, and a 4.10 rear, the wide ratio will be useless.

Andrew

Jeremy@RPMTransmissions

iTrader: (12)

Yea like Andrew said, the 2.66 ratio will be a lot better for your needs. The 2.97 ratio will be more apt to spin the tires and not load the turbo as well.

MeentSS02

iTrader: (11)

So with the 2.66 1st gear ratio, are you stuck with the 0.80 and 0.64 5th and 6th ratios? I've half considered stepping up to a Magnum, but if I have to alter the 5th and 6th ratios to retain the same 1-4 ratios I have in my T-56, that would make the deal a little less exciting.

Jeremy@RPMTransmissions

iTrader: (12)

No, with the 2.66 trans you can opt for the .74/.50 gearset. If you choose the 2.97 trans you are stuck with the .74/.50.