Congrats.. you have one of the "freak" cars. Even using the 59 hp loss that most agree is average for the Evo you have nearly 300 HP at the crank.

 

WTF, then how did this guy pick up so much power (see link) with a tune and alcohol injection? I will have the same mode as him minus the alki, but I am using higher octane fuel to make up for it?!?! what gives?

https://www.evolutionm.net/forums/sh...hreadid=120164

 

Well I dunno man....I would be estatic if I could make more like 370 on that dyno, but I doubt I will. I guess just go and tell us the results

As far as the dividing by 1.37 goes I don't see how that makes sense. 37% of 276 is 100. So that would mean you are losing 100 hp to the wheels and that would mean you are making 176whp. You can't just divide by a number to account for loss you have to substract a percentage. It would be nice if it were that simple. You take a percentage of the original number and subtract that to see what you are making to the wheels. It makes sense too. 300hp crank * .25 = 75hp which would mean 225 to the wheels. In short I think it is closer to 25% not 37%. The equation looks like this: X - (loss percentage)X = (your wheel hp figure) X is your crank hp figure. I mean according to that I would be making 485hp......I don't think so. Where with a 25% loss it would be more like 406 which sounds about right.

 

Rich calculates it that way cuz that's how Dyno Dynamics designed their driveline program. RC Developments also uses the same dyno.

there was also a 59 ford wagon w/a '73 big block pushing twin (yes twin) garrett T04E's @ 15psi. he pulled 500whp & 730lbs tq @ a 25% loss (& 3 people in the backseat to aid traction). 500 x 1.25=625 crank, 730ftlbs x 1.25=912.5 crank tq which is more than a stock Powerstroke diesel. the dyno #'s may not be to your liking but the Aussie's have probably done more tuning than you. if you create a dyno that is more accurate than Dyno Dynamics than i'll agree with you 100%.

 

I dunno. According to your calculation I am making 417 hp, which I dunno about. I do know stock 911 turbos put down 295ish on that dyno which would be about 404hp. The Gallardo would be at 465hp with its 340whp showing on that dyno. The equation I put in my last post is the real way to do drivetrain loss. X - YX = Z
where x = crank hp, y = percentage of loss and z = wheel hp. Or X = Z / (1-Y)

 

that #'s aren't far off considering that a stock 911 turbo's crank hp is 415. 415 / 1.37 =302.91whp. Gallardo's crank hp is 500 / 1.37 gives that car 364.96whp.

my buddy John's modded STI pulled 320whp with an APS sr55 turbo, 720 injectors, aps top mount, fuel pump, 3" turbo back & ecutek flash theoretically making his car faster than this new ESX STI people are talking about (438.4 crank hp vs 425).

 

if i were you fre, call Rich (Dyno-Comp's owner) on monday & have him explain the dyno to you in detail. he's been working with it for over a year & was a mechanical engineer b4 he opened his business.

www.dynocomp.com

 

Oh I know he was a mechanical engineer. I have done several modifications at his shop, including my old wrx. He has my next mods (cams and head studs) there right now. I was just pointing out that the 1.37 figure you are stating is NOT 37% drivetrain loss it is a different number. I am not saying it is inaccurate necessarily just that it isn't a drivetrain loss percentage of 37%. So if my car makes 417 like that multiple says you would take 417 * .37 = 154 so then my car would be making 417 - 154 = 263 with a 37% loss. I am not saying your multiple is wrong just that it is not 37%.

 

You're way off base, and Dyno Dynamics would be sad to hear it. If you run the car in shootout mode on that dyno, it gives estimated crank HP. Driveline losses aren't on a unilateral percentage either, as you make more power, the "percentage" absorbed by the driveline is less.

My car has almost 130 runs on a Dyno Dynamics dyno, and if your car made 237, it would shoot out at about 308 crank. Also, 237 is abnormally strong for an 05 on a DD. The highest stock 05 I've ever seen was 225whp, and most 04s in the 205-210whp range.

Anyway, 37% is asinine, and not close to correct. My car made 318whp on a Dyno Dynamics. In the mod process, I made 11whp peak with the 264 cams on that dyno, and 22whp peak with the hotside and SSautochrome manifold.

 

anybody want to tell me what a wednesday motor is?

 

He is referring to how people tend to slack off on their jobs come Friday. So they would build a less than desireable product on Friday, but on Wednesday it would be a well made one.

 

thnx

 

i want a wednesday motor

 

well that is what he says it is. there were alot of Audi & BMW guys there yesterday all perplexed at where their #'s were at saying they were too low. as usual on a dyno day he explains the difference between dd & the other dyno companies.

bottom line is i don't care about a dyno #. if i mod a car it beats exotics with ease, then i know i've done something right. he's had stock srt-4's (on several occasions) pull to the wheels what they are rated at the crank. not unusual. he had an 05 STI w/ just a 3" catback pull 250whp which he thought was unusual. there are tons of variables & this is probably why Al does road tuning.

 

they don't rate more than 280 hp for japanese manufactured cars, some sorta agreement from 80's.