Horsepower question within?
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Horsepower question within?
I own a black 99 lighting and already ordered the intake and chip but I was searching through some of the messages and saw one written by Lightingtuner, that said he dyno's lightings all the time and half of them have between 310-320hp stock and the other half between 350-360. Nothing in between. Did Ford screw up like they did on the 99 cobras or not. Thanks
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From: Northern, California
I believe Sovich is confusing rear wheel HP and flywheel HP. Lightnings are rated @360HP at the flywheel by Ford. It's well know that that number is conservative. All dyno and horsepower numbers you see being posted here on the board by Lightning owners are rear wheel.
[This message has been edited by Calightnin (edited 08-05-2000).]
[This message has been edited by Calightnin (edited 08-05-2000).]
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From: Dallas, Texas
well.....here is the difference.
The HP rating that FORD claims and most manufacturers report is the horsepower at the crank....or how much horsepower the motor is supposed to produce. When people use a chassis dyno to get HP readings, they are getting the HP at the wheels....after drivetrain loss. Most people agree that a motor should lose anywhere from 10-18% (depending on tranny etc) of its power due to drivetrain loss. So...a car rated at 350HP should dyno around 295-300 HP at the wheels.
I have a 1999 Corvette that as rated from the facotry has 345 HP and 350 lbs of torque. I dynoed my vehicle in stock trim at 307 RWHP (rear wheel horsepower) and 317.7 RWTQ (rear wheel torque).
i hope this helps.
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1999 C5 FRC
The HP rating that FORD claims and most manufacturers report is the horsepower at the crank....or how much horsepower the motor is supposed to produce. When people use a chassis dyno to get HP readings, they are getting the HP at the wheels....after drivetrain loss. Most people agree that a motor should lose anywhere from 10-18% (depending on tranny etc) of its power due to drivetrain loss. So...a car rated at 350HP should dyno around 295-300 HP at the wheels.
I have a 1999 Corvette that as rated from the facotry has 345 HP and 350 lbs of torque. I dynoed my vehicle in stock trim at 307 RWHP (rear wheel horsepower) and 317.7 RWTQ (rear wheel torque).
i hope this helps.
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1999 C5 FRC
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From: Bay Area, CA
The original post is correct... Sal said exactly that...
It's in the infamous "70.2HP from exhaust" thread: https://www.f150online.com/f150board...ML/003912.html
Anyway, I have posted this question on Sal's board, maybe he has an answer.
-Dreamin
'00 L
It's in the infamous "70.2HP from exhaust" thread: https://www.f150online.com/f150board...ML/003912.html
Anyway, I have posted this question on Sal's board, maybe he has an answer.
-Dreamin
'00 L
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Thats where I saw it. I was just wondering. I know the difference between horsepower at the crank and at the rear wheels but I don't understand why some of the lighting have between 310-320hp and others around 350. It just doesn't make sense unless ford screwed up again like the cobras. Thanks
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Just to shed a little light on this topic....
First, a chassis dyno will give you rear wheel power, driveline losses *and* flywheel power, not just rear wheel power. What it actually measures is rear-wheel torque, which it them translates into horsepower. The vehicle is taken up to it's top speed in a 1:1 ratio, and then a drag-down test is done where the vehicle coasts down from it's top speed on the dyno, to arrive at driveline losses to get the corrected flywheel figure. Typical 360 hp Lightnings at the flywheel will deliver 291 hp at the rear wheels for example, as the 4R100 drivetrain eats up 69 horsepower on average, while a standard V-8 F-150 with 4R70W automatic drivetrain will eat up about 65 hp in comparison. This is on a good eddy-current chassis dyno, not an inertia dyno.
At the Superchips development facility, we're seeing power ratings at the flywheel of anywhere from 328 to 364 on the 2000's, and 320-375 on the 1999 models, with extremely few making over 360 hp, and many not even making their rated power. It is *not* true that the Lightnings are "under-rated" in any way, or that they are by-and-large making more than their rated power. Most of them do not make their rated power at sea level altitude in temperature controlled eddy-current dyno cells. Which is why we see so much variance in the 1/4 mile ET's & mph.
I hope this info helps just a bit......
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Mike Troyer
Performance Products, Inc.
National Distributor of Superchips
(540) 862-9515
Email: mtroyer@compuserve.com
Performance Products F150Online Superchip ordering system: F150Online Superchip Ordering System
First National F-150 Online Rally Info:https://www.f150online.com/rally2000/index.html
First, a chassis dyno will give you rear wheel power, driveline losses *and* flywheel power, not just rear wheel power. What it actually measures is rear-wheel torque, which it them translates into horsepower. The vehicle is taken up to it's top speed in a 1:1 ratio, and then a drag-down test is done where the vehicle coasts down from it's top speed on the dyno, to arrive at driveline losses to get the corrected flywheel figure. Typical 360 hp Lightnings at the flywheel will deliver 291 hp at the rear wheels for example, as the 4R100 drivetrain eats up 69 horsepower on average, while a standard V-8 F-150 with 4R70W automatic drivetrain will eat up about 65 hp in comparison. This is on a good eddy-current chassis dyno, not an inertia dyno.
At the Superchips development facility, we're seeing power ratings at the flywheel of anywhere from 328 to 364 on the 2000's, and 320-375 on the 1999 models, with extremely few making over 360 hp, and many not even making their rated power. It is *not* true that the Lightnings are "under-rated" in any way, or that they are by-and-large making more than their rated power. Most of them do not make their rated power at sea level altitude in temperature controlled eddy-current dyno cells. Which is why we see so much variance in the 1/4 mile ET's & mph.
I hope this info helps just a bit......
------------------
Mike Troyer
Performance Products, Inc.
National Distributor of Superchips
(540) 862-9515
Email: mtroyer@compuserve.com
Performance Products F150Online Superchip ordering system: F150Online Superchip Ordering System
First National F-150 Online Rally Info:https://www.f150online.com/rally2000/index.html
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Mike,
Do you have anydetails on how superchips is running the trucks on the dyno?
I'm just curious, because you can see a ~20 rwhp swing based on heat soaking the Engine.
I've had my truck on a (2) dynoJet and (1) eddy current, and have found the eddy current to be inline with the dynojet, while the dynojet is real just a measurement tool, the eddy-current makes a better tuning tool. I was surprised to see that the Eddy Current was so close to the dynoJet results.
P.S. We found ~60hp peak lose on my drivetrain.
Do you have anydetails on how superchips is running the trucks on the dyno?
I'm just curious, because you can see a ~20 rwhp swing based on heat soaking the Engine.
I've had my truck on a (2) dynoJet and (1) eddy current, and have found the eddy current to be inline with the dynojet, while the dynojet is real just a measurement tool, the eddy-current makes a better tuning tool. I was surprised to see that the Eddy Current was so close to the dynoJet results.
P.S. We found ~60hp peak lose on my drivetrain.