Oh gentleman,gentleman, please....rest your sphincters!! Let's let FieroX show us what he can do with that newfound HP and all pray to the horsepower gods for a solid Nine second quarter!! haha peace
Just read an article between dyno manufacturers/numbers. My 548 was made on a Mustang dyno. The 474 was made on a Dyno Dynamics. They say the Dyno Dynamics is the "heartbreaker" of dynos for that reason, that it reads lower because of the way it loads the car and makes a better real world type tuning atmosphere. They say to get a Mustang dyno type number, you take the Dyno Dynamics number and multiply by 1.18 to get a conversion. Theoretically I could of made 559 on a Mustang dyno yesterday which makes me happy because running 2 psi less boost, I would of theoretically made 11 more hp than last time on a Mustang dyno. Ive got it out for that Dyno Dynamics though to break 500.
Originally posted by Justinbart: How about a debate on what is easier/cheaper to get 550whp from?
...I guess it should be the same right? Just need a couple extra injectors and valve springs for the LS. I think the formula is just get a stock bottom end, bolt a 700hp turbo on, cool it and give it some extra fuel. Right?
I completely agree. Now that wasn't the question, was it?
quote
Originally posted by fieroX:
Just read an article between dyno manufacturers/numbers. My 548 was made on a Mustang dyno. The 474 was made on a Dyno Dynamics. They say the Dyno Dynamics is the "heartbreaker" of dynos for that reason, that it reads lower because of the way it loads the car and makes a better real world type tuning atmosphere. They say to get a Mustang dyno type number, you take the Dyno Dynamics number and multiply by 1.18 to get a conversion. Theoretically I could of made 559 on a Mustang dyno yesterday which makes me happy because running 2 psi less boost, I would of theoretically made 11 more hp than last time on a Mustang dyno. Ive got it out for that Dyno Dynamics though to break 500.
The fixed multiplication factor is a kludge, but I suppose someone decided it works for half-assed comparisons for "typical" cars.
The Dyno Dynamics is probably an inertia type. The difference is that some engine torque is being used to accelerate the moment of inertia of the drivetrain's rotating parts.
Unless you're driving your car on the Bonneville salt flats trying to set a speed record, in most sorts of driving, the engine is accelerating, so that's probably why they say it's "more realistic".
With a steady-state (or more slowly ramping) Mustang dyno, the drivetrain's moment of inertia doesn't come into play. Engine torque not used for accelerating these parts is put down to the rollers.
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10:30 AM
dratts Member
Posts: 8373 From: Coeur d' alene Idaho USA Registered: Apr 2001
How about a debate on what is easier/cheaper to get 550whp from?
...I guess it should be the same right? Just need a couple extra injectors and valve springs for the LS. I think the formula is just get a stock bottom end, bolt a 700hp turbo on, cool it and give it some extra fuel. Right?
He answered my question about that. He has some forged internals too. I have a turbocharged ls4 and I don't feel a need to argue about what is best. I'm really happy with what I've got, but I'm not planning to compete with it. Ls/3800, take your choice. Obviously the 3800 is working for Fierox. The ls/3800 debate should be a fun thing without all the negative comments.
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10:53 AM
dratts Member
Posts: 8373 From: Coeur d' alene Idaho USA Registered: Apr 2001
I'm following fierox, Don Kraus, and Fog. Since Fog has a built grand national engine with a th425 tranny and a 10.6 so far I think he can wring a lot more out of his setup. I'm guessing that Don will need to boost his engine to be competitive with these guys, but it's a great build anyway as are all of these. They're all fast fieros and fascinating to me.
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11:10 AM
L67 Member
Posts: 1792 From: Winston Salem, NC Registered: Jun 2010
I sure hope you are gonna back this up with a SERIOUSLY fast time soon or you are gonna be the biggest poser on here pretty darn quick!! What kinda tranny do you have that is stronger than the one in that Gn motored car? Oh well I will give it to ya man, ya got balls as big as churchbells....peace
Pete
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05:47 PM
fieroX Member
Posts: 5234 From: wichita, Ks Registered: Oct 2001
I have factory rotors, front calipers on the rear, doing away with Ebrake, ceramic pads, and a custom vacuum pump system that actuates when I hit the brake pedal. Works in conjunction with engine vacuum, also works with a series of two check valves that allow vacuum to operate the booster under times of boosting on the line.
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01:39 AM
TommyRocker Member
Posts: 2808 From: Woodstock, IL Registered: Dec 2009
He didn't say his LS couldn't make the power, he was referring to 28 pounds of boost. A common rule of thumb for stock LS engines is ~10 psi, though some people do push past that. Reading comprehension, people... learn it.
He didn't say his LS couldn't make the power, he was referring to 28 pounds of boost. A common rule of thumb for stock LS engines is ~10 psi, though some people do push past that. Reading comprehension, people... learn it.
