Been wanting to do this for a wile and unfamillias question about seat weights got me thinking...

So time to blow out a fue cobwebs and put some of my schooling to real life.

What I wanted to do was to try and relate weight loss to h/p gain atw.......ie fit fi glass bonet=xxx amount of h/p gain.

As we all know weight loss wont incress h/p atw, but I wont to try and relate weight loss to an incress in h/p somehow.

For example, you could add extractors a webber carb and get a gain of 5 hp atw, or for the same gain you could remove seats and heater and get the same relation in gain, hope this make sence.


So here goes,

Datsun 1200 700kg
a15 engine 90h/p (55 h/p atw)

1000/700=1.428x90= 128.57 h/p per ton.


Aply weight loss

remove back seat -20kg
remove carpet -10kg
remove passenger seat -12kg
fit race seat -6kg
remove heater -3.5kg
fit fi glass bonett -6kg
fit fi glass bumpers -8kg

Total weight loss -65.5kg

Datsun 1200 700-65.5= 634.5kg

1000/634.5=1.576x90= 141.84 h/p per ton

141.84 - 128.57 = a h/p gain of 13.27 per ton.


This is where I got stuck, but here goes, pull me up if i,m wrong.

If I have an extra 13.27 fly wheel h/p per ton after weight loss,

then
13.27/ 1.576= 8.42h/p per 634.5kg,

or the same as adding 8.42 flywheel h/p to a 700kg datsun 1200....

Anyone following this, i,m lost.

So from this you could say that a loss of 65.5kg = 8.42 gain in flywheel h/p or about 6 or so h/p atw wheels.


Thats it from me as I think I have smoke coming out my ears now.