horsepower engine to wheels
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Joined: Feb 2006
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horsepower engine to wheels
my 2000 automatic stock 345 hp @ motor mustang dynoed @ 320hp with 329 torque
mods added k&n air flow, x pipe with magnaflow exhaust, superchip tune mustang dynoed @ 339 hp with 348 torque
added kooks LT headers with high flow cats all stainless steal 3" pipe with mandrel bends. Speed shop had problems with mustang dyno and mustang came out and put new roller and new program new dyno came out with 317 hp and 347 torque speed shop said original numbers were high because dyno was wrong . Does anyone know the percentage of horsepower lost from engine to wheels ? Can anyone approximate with all mods what my horsepower should be?
mods added k&n air flow, x pipe with magnaflow exhaust, superchip tune mustang dynoed @ 339 hp with 348 torque
added kooks LT headers with high flow cats all stainless steal 3" pipe with mandrel bends. Speed shop had problems with mustang dyno and mustang came out and put new roller and new program new dyno came out with 317 hp and 347 torque speed shop said original numbers were high because dyno was wrong . Does anyone know the percentage of horsepower lost from engine to wheels ? Can anyone approximate with all mods what my horsepower should be?
Burnout
Joined: Jan 2004
Posts: 1,437
Likes: 12
From: South Surrey (White Rock) British Columbia
Mustang Dyno
Originally Posted by y2kvette magnetic
my 2000 automatic stock 345 hp @ motor mustang dynoed @ 320hp with 329 torque
mods added k&n air flow, x pipe with magnaflow exhaust, superchip tune mustang dynoed @ 339 hp with 348 torque
added kooks LT headers with high flow cats all stainless steal 3" pipe with mandrel bends. Speed shop had problems with mustang dyno and mustang came out and put new roller and new program new dyno came out with 317 hp and 347 torque speed shop said original numbers were high because dyno was wrong . Does anyone know the percentage of horsepower lost from engine to wheels ? Can anyone approximate with all mods what my horsepower should be?
mods added k&n air flow, x pipe with magnaflow exhaust, superchip tune mustang dynoed @ 339 hp with 348 torque
added kooks LT headers with high flow cats all stainless steal 3" pipe with mandrel bends. Speed shop had problems with mustang dyno and mustang came out and put new roller and new program new dyno came out with 317 hp and 347 torque speed shop said original numbers were high because dyno was wrong . Does anyone know the percentage of horsepower lost from engine to wheels ? Can anyone approximate with all mods what my horsepower should be?
Dynoed on Dynojet at 301hp/326tq a/f 12.3-12.9
Dynoed on Mustang at 244hp/297 tq
3 weeks apart and no tune
Mustang Dyno is good for nothing. a/f 9.9 to 10.3
mrgil
Racer
Joined: Jun 2005
Posts: 466
Likes: 0
From: Va. Beach VA
Originally Posted by y2kvette magnetic
my 2000 automatic stock 345 hp @ motor mustang dynoed @ 320hp with 329 torque
mods added k&n air flow, x pipe with magnaflow exhaust, superchip tune mustang dynoed @ 339 hp with 348 torque
added kooks LT headers with high flow cats all stainless steal 3" pipe with mandrel bends. Speed shop had problems with mustang dyno and mustang came out and put new roller and new program new dyno came out with 317 hp and 347 torque speed shop said original numbers were high because dyno was wrong . Does anyone know the percentage of horsepower lost from engine to wheels ? Can anyone approximate with all mods what my horsepower should be?
mods added k&n air flow, x pipe with magnaflow exhaust, superchip tune mustang dynoed @ 339 hp with 348 torque
added kooks LT headers with high flow cats all stainless steal 3" pipe with mandrel bends. Speed shop had problems with mustang dyno and mustang came out and put new roller and new program new dyno came out with 317 hp and 347 torque speed shop said original numbers were high because dyno was wrong . Does anyone know the percentage of horsepower lost from engine to wheels ? Can anyone approximate with all mods what my horsepower should be?
Safety Car
Joined: Oct 2004
Posts: 4,816
Likes: 132
From: Plano TX
Those first 2 dynos are way off. Way to high.. Stock numbers should be around 290hp and310 torque.. MUSTANG Dynos are a POS.. Stick with a Dynojet. The last dyno you did with the headers looks about right.
--------------------------------------------------------------------------------
Power loss for a4 = 18% for a 6 speed its 15%
Formula is rwhp divided by 0.82 for a4 = crank hp
Formula for 6 speed is rwhp divided by 0.85 = crank hp
Example 287rwhp divided by 0.82 = 350 crank hp (stock a4)
Example 298rwhp divided by 0.85 = 350 crank hp (stock 6speed)
And yes every car is different horsepower can vary + or - either way. Sean at Fast Tech Dyno tests Ls1 powered cars all day and has done so for years. He uses this formula and its pretty close to right on the money..
--------------------------------------------------------------------------------
Power loss for a4 = 18% for a 6 speed its 15%
Formula is rwhp divided by 0.82 for a4 = crank hp
Formula for 6 speed is rwhp divided by 0.85 = crank hp
Example 287rwhp divided by 0.82 = 350 crank hp (stock a4)
Example 298rwhp divided by 0.85 = 350 crank hp (stock 6speed)
And yes every car is different horsepower can vary + or - either way. Sean at Fast Tech Dyno tests Ls1 powered cars all day and has done so for years. He uses this formula and its pretty close to right on the money..
Last edited by David426; Mar 10, 2006 at 11:21 AM.
Racer
Joined: Sep 2005
Posts: 260
Likes: 10
From: Amarillo Texas
Ill put some on my opinion on this.
I have a 1999 Coupe with Kooks Longtubes and Off-Road X-Pipe. It dynoed on a Superflow dyno calibrated for Dynojet at 334hp and 350 tq. Most people around the nation are using a dynojet for a standard. So when someone gets low numbers on a Superflow, or mustang dyno, they think those dynos are junk. I believe a little bit differently. The mustang dyno, superflow or etc. all have their own calibration factor, but the main thing to keep in mind is that those dynos use a different load rating to help load the car more and provide a more accurate reading and more consistent. This may not be a huge issue on NA cars, But on boosted or juiced cars, Its nice to be able to create a load on the car to build boost or let the car rev slower to get a more accurate reading. This is alos a huge advantage when it comes to tuning these cars, If you can slow down the revs on the dyno, You can get a more accurate tune.
Just my .02
I have a 1999 Coupe with Kooks Longtubes and Off-Road X-Pipe. It dynoed on a Superflow dyno calibrated for Dynojet at 334hp and 350 tq. Most people around the nation are using a dynojet for a standard. So when someone gets low numbers on a Superflow, or mustang dyno, they think those dynos are junk. I believe a little bit differently. The mustang dyno, superflow or etc. all have their own calibration factor, but the main thing to keep in mind is that those dynos use a different load rating to help load the car more and provide a more accurate reading and more consistent. This may not be a huge issue on NA cars, But on boosted or juiced cars, Its nice to be able to create a load on the car to build boost or let the car rev slower to get a more accurate reading. This is alos a huge advantage when it comes to tuning these cars, If you can slow down the revs on the dyno, You can get a more accurate tune.
Just my .02
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Team Owner
Joined: Apr 2001
Posts: 36,453
Likes: 2
From: Overwhelmed as one would be, placed in my position.... DFW, TX
St. Jude Donor '05
Originally Posted by mrm1149
So are any of these Dynos accurate?
See sig for my dynojet results (with mods similar to yours).