F1 tuning claims 30% hp increase, 40% tq increase, you believe it?

[Cossey]

@love4boost

Call me dumb, but I have no idea what you just did? I usually estimate a 20% loss in crank to wheel horsepower no? The f1 tune claims a 30% increase in horsepower, just to make it believable I only added a 20% CRANK hp increase which would be 58. 58 plus the existing 290 CRANK horsepower would be 348 CRANK horsepower which is how I came up with my number. Like I said earlier, I find it a pretty good sales techique to advertise crank horsepower when selling performance cars as is just looks better lol.

Your car dyno’d 238whp today, so I used that figure. You need to remember that the 238whp is 80% of your crank horsepower, which is very different from adding 20% to get the number. I did cross multiplication (7th grade technique) to get the number of 297.5 crank horsepower, which would be the full 100% value. 80/100 = 238/297.5.

Using your method (based on your dyno, not the dyno + claims from F1), you’d take the 238whp and multiply it by 1.2 (as in 120%, since 238 would be 100%, but you want 20% more for the crank hp figures). 238x1.2 = 285.6 crank horsepower.

I’m not factoring in the 30% gains claimed by F1, and neither should you because it’d just be straight up lying to the potential buyer. Wait til you get a dyno number after the tuning and THEN figure out the real crank hp number.