question on the "15% rule" with dyno differences
 

So, when I take 15% of 350(whp) it's 52.5. so I add those to get 402.5.

Then I take 15% of 402.5 and get 60.375, so 60 hp.

If I were to first dyno my car on a DD and get 350, then go straight to a Dynojet, I could expect about 402whp, yes?

But say I went first to a Dynojet and got 402whp, and thought, well, 15% less is 340, then went to a DD expecting to get 340, what would I get?


Also, two trains leave the station at the same time, one heading west, one heading east... just kidding.

Re: question on the "15% rule" with dyno differences
 

it's two trains leave different stations..one headed east at x mph, the other headed west at y mph..they are 600 miles apart..where do they hit..

-A. Swift

Re: question on the "15% rule" with dyno differences
 

^ perfect.

its the same difference.

Re: question on the "15% rule" with dyno differences
 

Re: question on the "15% rule" with dyno differences
 

402.5/1.15=350

You need to divide by 115%, not multiply and subtract.

Re: question on the "15% rule" with dyno differences
 

It's been a while since math class eh?

Re: question on the "15% rule" with dyno differences
 

Hey man, I never claimed to know what I was talking about, that's why I axed, yo! And yeah, it's been a long time. You deserve a big facepalm yourself.

Re: question on the "15% rule" with dyno differences
 

It's not a solid 15%. It varies from car to car.

Re: question on the "15% rule" with dyno differences
 

Don't rely on the 15% rule. My S2k only put down 4% more power on a DynoJet but my Evo did put down exactly 15% more.

Re: question on the "15% rule" with dyno differences
 

Just teasing. :p

Face in palm now.