Analyzer on this site, flywheel or RW HP figures?

skiwesser · 11-22-2005, 03:04 AM

Prob a stupid Q:, but I haven't really checked it out yet.
Is it very useful?

Unit 5302 · 11-22-2005, 08:06 PM

Flywheel, I believe. Hard to predict RWHP considering the possible changes to the driveline.

I think the analyzer can be a helpful tool in some cases.

Jeff Chambers · 11-23-2005, 08:31 AM

See I would have said RWHP. The equations of motion don't know anything about the internal losses, just what it takes to accelerate a given mass over a fixed distance...that would mean the power required at the ground. Its assuming a linear or constant rate of acceleration too, which is far from reality. Its such a simple calcuation, that it doesn't take in to account other variables such as aerodynamic drag, rolling friction, etc. I'll have to dig out my old physics and mechanics books and see if I can verify the numbers.

~The Jester~ · 11-23-2005, 09:25 AM

I'm going with Jeff on this one. RWHP. Simple equation, it takes "X" amount of horespower to move "Y" amount of weight at "Z" speed in 1320 feet. Moroso's slide rule has it on there, and it states RWHP on it, so I think the analyzer uses the same formula.

It's useful to "ballpark" your horsepower, and when at the track I always tune to my MPH instead of my ET.

nitrous_bob · 11-24-2005, 12:03 PM

depends which calculator....hp and weight to fig et? or et and trap speed w/ weight to fig hp.

the et calculator must be flywheel, cuz the numbers seem too high, the other i would guess to be rwhp

Unit 5302 · 12-03-2005, 12:26 AM

If it's indicating RWHP, then I'd trust that's what it is. Mostly I use the analyzer for fuel system guesstimates, and I know that's flywheel.

andy669 · 12-03-2005, 09:57 PM

The analyzer on this site must be using FWHP. I punched in 500 and 3325 (my cars exact specs) and it was right on the best et and mph.

Andy

fiveohpatrol · 12-10-2005, 04:42 PM

FWHP, dang Andy, I didn't know you made the move over to the front drive import scene

11-22-2005, 03:04 AM	#1
skiwesser Registered Member Join Date: Sep 2000 Location: rock hill,S.C. 29730 Posts: 420	Analyzer on this site, flywheel or RW HP figures? Prob a stupid Q:, but I haven't really checked it out yet. Is it very useful? __________________ 88 GT: subs,pullies, 1 3/4 longtubes, flowmasters, AFR 165's,T,F #1 cam,Thyphoon intake, 24# inj., 73mm C&L,65mmT.B., 190LPH pump, Eagle sir rods, forged pistons in a newly rebuilt 306. DYNO TUNED TO 300.97 RWHP 337RWTQ

11-22-2005, 08:06 PM	#2
Unit 5302 Registered Member Join Date: May 1999 Posts: 5,246	Re: Analyzer on this site, flywheel or RW HP figures? Flywheel, I believe. Hard to predict RWHP considering the possible changes to the driveline. I think the analyzer can be a helpful tool in some cases.

11-23-2005, 08:31 AM	#3
Jeff Chambers Moderator Join Date: Aug 2000 Location: Milan, OH Posts: 2,699	Re: Analyzer on this site, flywheel or RW HP figures? See I would have said RWHP. The equations of motion don't know anything about the internal losses, just what it takes to accelerate a given mass over a fixed distance...that would mean the power required at the ground. Its assuming a linear or constant rate of acceleration too, which is far from reality. Its such a simple calcuation, that it doesn't take in to account other variables such as aerodynamic drag, rolling friction, etc. I'll have to dig out my old physics and mechanics books and see if I can verify the numbers. __________________ Jeff Chambers 1990 Mustang GT 10.032 Seconds / 137.5 MPH 14-time Street Warrior World Record Setter CRT Performance 2001 Tropic Green Mustang GT - 12.181 / 113.2 MPH 2002 Ford F-250 Crew Cab 7.3l Power Stroke - 17.41@77.2 "There's nothing boring about a small block automatic shifting gears at 9400 rpm!"

11-23-2005, 09:25 AM	#4
~The Jester~ Rat Killer Join Date: Aug 2002 Location: Cold ass Ohio Posts: 1,143	Re: Analyzer on this site, flywheel or RW HP figures? I'm going with Jeff on this one. RWHP. Simple equation, it takes "X" amount of horespower to move "Y" amount of weight at "Z" speed in 1320 feet. Moroso's slide rule has it on there, and it states RWHP on it, so I think the analyzer uses the same formula. It's useful to "ballpark" your horsepower, and when at the track I always tune to my MPH instead of my ET. __________________ d-Con Racing "Nothing fancy, just 347 inches of RAT POISON!" MICE need not apply.....

11-24-2005, 12:03 PM	#5
nitrous_bob Registered Member Join Date: Oct 2005 Location: saint clair shores MI Posts: 15	Re: Analyzer on this site, flywheel or RW HP figures? depends which calculator....hp and weight to fig et? or et and trap speed w/ weight to fig hp. the et calculator must be flywheel, cuz the numbers seem too high, the other i would guess to be rwhp __________________ '93 notch....6th mustang and counting check out http://www.burnouts.stangnet.com

12-03-2005, 12:26 AM	#6
Unit 5302 Registered Member Join Date: May 1999 Posts: 5,246	Re: Analyzer on this site, flywheel or RW HP figures? If it's indicating RWHP, then I'd trust that's what it is. Mostly I use the analyzer for fuel system guesstimates, and I know that's flywheel.

12-03-2005, 09:57 PM	#7
andy669 Registered Member Join Date: Jan 2001 Location: Moline Il Posts: 901	Re: Analyzer on this site, flywheel or RW HP figures? The analyzer on this site must be using FWHP. I punched in 500 and 3325 (my cars exact specs) and it was right on the best et and mph. Andy __________________ 88 coupe 91 LX NMRA Pure Street 5120

12-10-2005, 04:42 PM	#8
fiveohpatrol I'd rather be basketweaving Join Date: Feb 2000 Location: Indianapolis Posts: 2,551	Re: Analyzer on this site, flywheel or RW HP figures? FWHP, dang Andy, I didn't know you made the move over to the front drive import scene __________________ NMRA O/C 9516 NA pumpgas stickshift 347 10.65@125.6, 6.73@100, 1.41 60ft

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