I'm used to the exaggeration, as you say Flanders, I think most of the world has starting taking a lot of US dynos with a pinch of salt, they're too often in a shootout mode to keep customers happy, almost any car I've brought over from the US has ended up making at the flywheel what was claimed at the wheels on dynos here over the decades, I think we're all used to that one, vagueries of testing and some hand waving - but some of the numbers floating around here these days are downright physically impossible.

The top speed claim doesn't correlate it at all, it dis-proves it, you claim more aero in an attempt to excuse maybe more drag too but the fact of the matter is just in outright speed alone you wouldn't need 30% more power to hit 128mph from 112mph. You'd need 50% more power. Just to counter the additional drag alone.
That's not including more power to overcome the extra aero/downforce drag, and not including you would need even more power than that as your corresponding acceleration rate needs to be even higher that the power increase gives you (as you're on the straight for less time)

Ergo the straightline speed increase is from increased cornering speeds, aero, grip/tyres, driver skill, etc, more than anything - because it doesn't line up with the power claim at all.

 

I really don't care much to argue this. I tune for a living and I have a pretty good idea of getting some power out of cars. My cornering speed actually wasn't that much different as I hadn't been on track for 4+ years by the time I got the turbo aero setup out, where I had previously had a lot of consecutive track time.


Min speed for NA no aero prior to straight:





Min speed for aero and boost with years off track.




From that point, it's flat out. And that is ONE MPH difference.


So... What else do you want to bitch about?

 

Okay so now you wouldn't - or only just barely given a bit of slop in the actual figures - make that top speed difference even if you assumed all that extra power led to a constant, full increase in acceleration, for the full percentage power increase, over the entire straight, and completely ignored drag increasing by 30+ percent.

See what I mean? You might have the results you want, fine.
But none of your figures add up anywhere.
I'm not arguing the results. I'm arguing the figures. Every time you add more the less they add up. Because now your figures suggest you're making even more increase power than you claim (or the stock motor was making a lot less for some reason). And that set of figures was eyebrow raising to start with.

If you don't care to argue it, don't, I'm not too bothered either, just seemed weird resurrecting an old thread to basically just brag about some slightly dubious figures because the OP needed 10psi to make the same (which is reasonable, tbfh).
Frankly the others in the thread don't need to be wondering if they've missed something with their setups when they're entirely reasonable.

Anyway, they can make their own minds up, I don't see much point de-railling an old thread even more.

 

I didn't realize it was a few months old... I just went down the list and it was on the first page, read it, responded.

Another addition to the story... It's high altitude. If you don't already have a extremely good grasp on it, you're going to struggle here. Take it how you want it. That is the boost that was being run, those are the numbers produces, and my speeds are real world performance.

Again, I do this for a living... Math it up all you want, I've got a tiny bit of experience here.

 

I like how you assume nobody else does. I've been building racecars for decades.

Math is math, it doesn't lie.

 

You assumed that I assumed... You've stated that my boost level isn't enough to make the power, then stated my speeds indicate more power (and ASSumed my corner speed was actually higher with the aero for the said speeds). Which math is it?

 

hiiii, got a better clutch, and a few supporting mods. made 401 whp at 16psi now on E85 (71% content)

it's a fcking rocket. my rear is whining though, no more clutch kicks and launches lol my ap2 trans is in. im going to put a ford 8.8 rear in at some point, if the ap2 trans ever goes i'll drop a bmw ZF 6spd in. for now though i can drive it everyday, i love it. my k24 ae86 is almost done, if my f20c ever goes she'll get k24 swapped