The damaged RB30 180B I recently bought is 1100kgs on the engineers report and thats in full street trim with the bigger brakes and diff required so almost silvia territory but with an extra Litre and potential to drop a fair few kgs of interior.

Makes me think whack a turbo on the side, strip the interior and put in a cage for some stupid amounts of track fun.

Say 150kw for a Vl Turbo motor
thats 182.8hp/ton, mmmmmm yummy!!

It would be cool if people list their dattos HP/Tonne figures..

Probably too much to ask as most people wouldnt know their car`s weight. but could be interesting.

Just use Datsss`s basic formula.

1000/cars weight x HP= ????

I used the formula to work out how much power i would need to compete with the others on the grid.... Scary!


RX7 950kg/290Hp =305 HP/T
Comm 1350kg/550Hp =407 HP/T

The Datto would need to make 285Hp to be up with the Commodore. Im about 135 short...bugger!

dude sr20 with 2871 turbo will be eazy around the 350hp mark with stock motor just injectors and niztune :D that give 437.5hp/t

Ive built it for the under 2lts class, was hoping to be in the top 10 outright. I`ll try with the Turbo A series and get as much weight out as i legally can.

It`ll end up about 300 Kg/T once sorted.

Your def right tho, Cossie55(member on here) runs a SR 20 in the over 2 lts class and makes Big HP! Im looking forward to seeing him up the pointy end.

The good thing about it also is that the more h/p you have to start with the greater the gain after weight loss.

Lets say you fit a super charger to the a15 and its got 180 flywheel h/p and 125rwhp

1000/700=1.428x180= 257.1 h/p per ton

and after weight loss

1000/634.5=1.576x180= 283.68


283.68- 257.1 = 26.58 flywheel h/p per ton


Wow thats double the from the first example....

OK for my 1200 the numbers are:

183rwkw = 245rwhp

Working off an estimated 20% driveline loss = 294 at the flywheel.

Estimated weight is 900kg. I am yet to have the car on a calibrated weighbridge.

1000/900 = 1.111 x 294 = 326HP/tonne

EDIT: I'm looking at 182.85hp/tonne :(