richard 384 Report post Posted June 3, 2017 It is said that for every pound of driveshaft rotational weight you reduce, you gain an effective 10hp at the rear wheels!* Is there any truth to this. Quote Share this post Link to post Share on other sites
tawa 150 Report post Posted June 3, 2017 There is something to it, as it takes energy/hp to increase rotational speed of components proportionate to weight in the same way it takes energy/hp to increase road speed proportionate to car weight. Might be in that sort of ballpark in 1st gear, but as you go up the gears, acceleration drops, so does the effect of drive-line weight. Quote Share this post Link to post Share on other sites
BM WORLD 1283 Report post Posted June 4, 2017 also diif and axle sizes . on couple of my cars we swap medium case diff to large case and on another did a large case to medium diff swap and there was about 8-10kw at the wheels difference even with the same ratios Quote Share this post Link to post Share on other sites
richard 384 Report post Posted June 4, 2017 I throw this question out there because I'm thinking of buying a 1 piece driveshaft in chromoly , I did look at carbon fibre but cant justify the price for only 1.5 kgs savings over chromoly, nearly 2x the price. They have a claim on their web site about the power gains. I'll price up one in NZ before I order. thanks for your input guys. Quote Share this post Link to post Share on other sites
aja540i 1906 Report post Posted June 4, 2017 It is also a lot easier said than done to remove weight from driveshafts without compromising strength. Quote Share this post Link to post Share on other sites
