WHP to crank HP calculator - Page 2 - TriStateTuners.com :: Home of Tristate Auto Enthusiast

assault187 · 11-24-2010, 08:58 AM

"774 hp @ the crank"

JankyS13 · 11-24-2010, 01:13 PM

was 409 crank? just don't see it

SoStock92 · 11-24-2010, 01:29 PM

Says mine is 790 bhp, probably pretty close. The only way to know is put an engine on an engine dyno, then a chassis dyno and see the loss. but either way, dynos are not an absolute value.

ndubz · 11-24-2010, 02:16 PM

Power is largely superficial anyway. Power/weight is what makes a car accelerate well, and the driver determines wether the car is fast or not.

SoStock92 · 11-24-2010, 02:21 PM

Quote:

Originally Posted by ndubz

Power is largely superficial anyway. Power/weight is what makes a car accelerate well, and the driver determines wether the car is fast or not.

Lets race ;)

pharnhyte · 11-25-2010, 06:58 PM

BHP= WHP/percentage of power that makes it to the wheels, when factoring in drivetrain loss.

For example I dynoed at 403hp/437 tq.

403/.85=474 crank hp
437/.85=514 tq.

I've sadly never met anyone who didn't simply take 400 and ad 60ish or so to get 460. Its simple math.

SleeperGoat · 11-25-2010, 07:39 PM

Alright 400 crank minus the 4 degrees we took out so I'm over the stock factory amount awesome lol

Silverfc88 · 11-25-2010, 07:40 PM

182 hp factory = 150 whp on that calc stock

450 crank power to 386 whp

Subie_sleeper · 11-25-2010, 08:46 PM

The first time I ever dyno'd the Baja it's baseline was 177 AWHP and the factory rating from the brochure at the dealer was 210 at the crank.

This is roughly 19 percent loss if my math is right.

The pull was on a Dynapak. No wheels seemed like cheating at the time, but the power LOSS was most likely a more accurate percentage without them.

The Baja did 340 the last time it was on the rollers. (Dynojet) If I multiply that by 1.19 it comes out to 404.6 round up

to 405.

The calculator guesstimated 417.

12 AWHP difference.

Pretty damn close in my book.

Sent from my iPhone using Tapatalk

Sent from my iPhone using Tapatalk

sean3 · 11-25-2010, 08:57 PM

Quote:

Originally Posted by ndubz

Power is largely superficial anyway. Power/weight is what makes a car accelerate well, and the driver determines wether the car is fast or not.

You're forgetting gearing. And you need traction to use accelerate anywhere. And the fact that a little thing known as aerodynamics is eventually going to not give a **** what your power/weight ratio is.

daewoo · 11-25-2010, 10:58 PM

my car is rated 82whp
and it ran a 16.9 @ 80

Higu · 11-25-2010, 11:43 PM

88 to the crank = 63 to the wheels

superskaterxes · 11-25-2010, 11:51 PM

i quote whp to car peeps and BHP to n00bs. simple as that

Subie_sleeper · 11-26-2010, 10:59 AM

Quote:

Originally Posted by superskaterxes

i quote whp to car peeps and BHP to n00bs. simple as that

Good policy.

Sent from my iPhone using Tapatalk

11-24-2010, 08:58 AM	#21
assault187 Tri-State Post Whore Join Date: Jul 2006 Location: Montgomery county Member #2176 My Ride: 97 Mitsubishi Eclipse GST Spyder AWD iTrader: (3)	"774 hp @ the crank" __________________ To view links or images in signatures your post count must be 10 or greater. You currently have 0 signatures. To view links or images in signatures your post count must be 10 or greater. You currently have 0 signatures. World record holder for Quickest and Fastest 1/4 mile Spyder, 4 cylinder vert, 1st in 10's, 2.0L 4G63 Holset record, Modified Mag December 2010, Self built, self tuned.

11-25-2010, 06:58 PM	#26
pharnhyte Tri-State Addict Join Date: Oct 2006 Location: Montgomeryville Member #2787 My Ride: 98 supra tt/(2)97 supra tt iTrader: (0)	BHP= WHP/percentage of power that makes it to the wheels, when factoring in drivetrain loss. For example I dynoed at 403hp/437 tq. 403/.85=474 crank hp 437/.85=514 tq. I've sadly never met anyone who didn't simply take 400 and ad 60ish or so to get 460. Its simple math. __________________ Mensa Society one of these days 98 supra TT 6 speed IJM apu 1 of 14 97 Supra TT auto bpu daily #1 97 Supra TT auto #2

11-25-2010, 07:39 PM	#27
SleeperGoat Tri-State Post Whore Join Date: Jan 2007 Location: Dolyestown-Pa Member #3339 My Ride: 84 Camaro/ 05 GTO iTrader: (0)	Alright 400 crank minus the 4 degrees we took out so I'm over the stock factory amount awesome lol __________________ formerly BlackZ05 05 Nissan 350z- Sold! 84 Camaro- Project from Hell car now Stripped an being Sanded.....Slowly no weekend life anymore 05 GTO - Push Button Performance w/ spooling action

11-25-2010, 07:40 PM	#28
Silverfc88 Tri-State Post Whore Join Date: Jan 2005 Location: NorCal Member #126 My Ride: 88 RX7 TII, 2012 WRX hatch iTrader: (5)	182 hp factory = 150 whp on that calc stock 450 crank power to 386 whp __________________ formerly 95nracer Instagram @Silverfc88 11.6@123mph Streetport 13bt, Haltech Sprint RE, FIC 1150cc + Delphi 1000cc injectors, Walbro 255, Borg Warner s360 .88, HKS mani, JGS 50mm, Greddy FMIC, HKS Twin Power, AEM water/meth inj Last edited by Silverfc88; 11-25-2010 at 07:43 PM.

11-25-2010, 08:46 PM	#29
Subie_sleeper Tri-State Post Whore Join Date: Sep 2007 Location: Center Valley Pa. Member #5775 My Ride: '06 Subaru Baja Turbo. Cash consuming vortex from HELL iTrader: (1)	The first time I ever dyno'd the Baja it's baseline was 177 AWHP and the factory rating from the brochure at the dealer was 210 at the crank. This is roughly 19 percent loss if my math is right. The pull was on a Dynapak. No wheels seemed like cheating at the time, but the power LOSS was most likely a more accurate percentage without them. The Baja did 340 the last time it was on the rollers. (Dynojet) If I multiply that by 1.19 it comes out to 404.6 round up to 405. The calculator guesstimated 417. 12 AWHP difference. Pretty damn close in my book. Sent from my iPhone using Tapatalk Sent from my iPhone using Tapatalk __________________ Time to concentrate on the damn leaky axle & gettin my exhaust straightened. To view links or images in signatures your post count must be 10 or greater. You currently have 0 signatures.

11-24-2010, 01:13 PM	#22
JankyS13 Tri-State Post Whore Banned Join Date: Dec 2009 Member #15373 My Ride: 91.S13.KA-T iTrader: (1)	was 409 crank? just don't see it

11-24-2010, 01:29 PM	#23
SoStock92 Tri-State Post Whore Join Date: Apr 2006 Member #1721 My Ride: 92 BMW 525, 95 BMW 525, 87 BMW 325, 95 BMW 530 iTrader: (0)	Says mine is 790 bhp, probably pretty close. The only way to know is put an engine on an engine dyno, then a chassis dyno and see the loss. but either way, dynos are not an absolute value.

11-24-2010, 02:16 PM	#24
ndubz Tri-State Post Whore Join Date: Oct 2007 Location: tristate area Member #6107 iTrader: (1)	Power is largely superficial anyway. Power/weight is what makes a car accelerate well, and the driver determines wether the car is fast or not.

11-25-2010, 10:58 PM	#31
daewoo Tri-State Addict Join Date: Apr 2009 Location: Lansdale Member #13542 My Ride: gsr civic and goped sport iTrader: (0)	my car is rated 82whp and it ran a 16.9 @ 80 __________________ "camden hookers and cars with no bumpers. The cars look (and probably smell) better."

11-25-2010, 11:43 PM	#32
Higu Tri-State Addict Join Date: Feb 2010 Location: New Jersey Member #15710 My Ride: 2009 Mazda6i Touring 5AT iTrader: (0)	88 to the crank = 63 to the wheels

11-25-2010, 11:51 PM	#33
superskaterxes Tri-State Addict Join Date: Jan 2009 Location: DC Metro Member #10675 My Ride: 2006 Mazdaspeed 6 iTrader: (0)	i quote whp to car peeps and BHP to n00bs. simple as that __________________ GT3076R BITCHES ~ TXS BOV ~ 3" MAF SRI ~ AP PROtune'd ~ MBC ~ Custom FMIC w/Treadstone TR8 Core ~ CPE DP ~ DNP Mani w/Tial 38mm MV-S EWG VTA'd~ CPE BT TIP ~ TWM SS ~ CPE RMM ~ TTFMM ~ CPE RDM ~ BC CO's slammed ~ SPC BJ's ~ EBC Red's ~ Stoptech's ~ Technafit SS Lines ~ Autometer Boost & STRI EGT ~ 20% Tint ~ LED Tails ~ Denso ITV-24's ~ CPE Dual CBE ~ Whiteline RSB ~ PnP'd IM ~ CDFP Internals ~ labonte meth kit ~ VC tapped OCC

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