C5 vs C7
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Would be interesting to know how that C7 got 450 rwhp with just LT and X-pipe since it had 460 bhp with no mods.
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From: Birmingham Al
I'm with you that can't be right .. To get 40more Hp to the rear you would need a lest 80 Hp if not a 100 HP you lose lots through the drive train so if you got say 80 and you lose 50% that would make something like that anyway not adding up .. I added a 100 HP to my LS-6 got around 40 - + to the real wheels.. That's on LMR rollers ..
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Melting Slicks
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From: Central Florida
I'm with you that can't be right .. To get 40more Hp to the rear you would need a lest 80 Hp if not a 100 HP you lose lots through the drive train so if you got say 80 and you lose 50% that would make something like that anyway not adding up .. I added a 100 HP to my LS-6 got around 40 - + to the real wheels.. That's on LMR rollers ..
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Melting Slicks
Joined: Jun 2002
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From: Mobile al
460 crank hp is about 391 at the wheels if you use the 15% loss for drivetrain.
With me at 385 to the wheels and lighter you can see where it would be a close race. My 385 at the wheels "should" make about 450 at the flywheel(ish).
You should brush up on your math.
With me at 385 to the wheels and lighter you can see where it would be a close race. My 385 at the wheels "should" make about 450 at the flywheel(ish).
You should brush up on your math.
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Melting Slicks
Joined: Jun 2002
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From: Mobile al
Melting Slicks
Joined: Jan 2014
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From: Central Florida
Anyhow your number for the c7 may be a bit off, plus it has a better drivetrain.
Melting Slicks
Joined: Jun 2002
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From: Mobile al
Better drivetrain? In what way? The C5 drivetrain is bullet proof and has been proved so for many years now. You mean better because its newer? Its simple to make LT1 power with an LS6 with only bolt ons.
I personally saw a C7 Z51 auto with Extrude honed exhaust manifolds, ported throttle body and air intake make 407 rwhp on a dynojet with standard correction factor on a cool day. Same day I made 398rwhp standard correction factor(I had an SLP catback at the time). This was at a Cars and Coffee event at sea level in 50 degree air.
Melting Slicks
Joined: Jan 2014
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From: Central Florida
Dynos lol. Was that dyno run SAE or standard? The sheet doesn't show it.
Better drivetrain? In what way? The C5 drivetrain is bullet proof and has been proved so for many years now. You mean better because its newer? Its simple to make LT1 power with an LS6 with only bolt ons.
I personally saw a C7 Z51 auto with Extrude honed exhaust manifolds, ported throttle body and air intake make 407 rwhp on a dynojet with standard correction factor on a cool day. Same day I made 398rwhp standard correction factor(I had an SLP catback at the time). This was at a Cars and Coffee event at sea level in 50 degree air.
Better drivetrain? In what way? The C5 drivetrain is bullet proof and has been proved so for many years now. You mean better because its newer? Its simple to make LT1 power with an LS6 with only bolt ons.
I personally saw a C7 Z51 auto with Extrude honed exhaust manifolds, ported throttle body and air intake make 407 rwhp on a dynojet with standard correction factor on a cool day. Same day I made 398rwhp standard correction factor(I had an SLP catback at the time). This was at a Cars and Coffee event at sea level in 50 degree air.
, but there is more to going fast than hp, whatever you do to a ls6 they can do to a LT1 to stay just ahead
I have a cammed 383 ls6 with a supercharger, I would love any c7 to try me... but around here they are all way to old and won't go
My drivetrain was far from bullet proof, never really read that much, useuely you hear about people upgrading it along with the Hp using C6 stuff, but I'm far from an expert. So please excuse me if I was wrong.
Last edited by Forcedvert; Dec 25, 2016 at 12:54 PM.
Melting Slicks
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From: Mobile al
Just something I googled, I'm sure you know what you are talking about, but there is more to going fast than hp, whatever you do to a ls6 they can do to a LT1 to stay just ahead
I have a cammed 383 ls6 with a supercharger, I would love any c7 to try me... but around here they are all way to old and won't go
, but there is more to going fast than hp, whatever you do to a ls6 they can do to a LT1 to stay just aheadI have a cammed 383 ls6 with a supercharger, I would love any c7 to try me... but around here they are all way to old and won't go
Melting Slicks
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From: Central Florida
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From: Plano TX
OK I will play. To a first approximation it is given by Huntington's Equation, 1/4 mile ET = 6.290 (weight/hp)^1/3, where weight is in pound and hp is the peak horsepower at the clutch (note other equations exists that give slightly different constant). The physical basis of the equation is described in a 1973 article entitled "On the Physics of Drag Racing" by G.T. Fox in The American Journal of Physics. So yes it is mostly all about HP and weight. The other bits, like torque etc... are secondary effects. This equation, indeed, tells us that a big torquey engines are at a disadvantage to a smaller high revving engine in racing if they both make the same power. You can see that in almost all racing series, a boosted car will beat a normally aspirated car. This also tells us why modern racing engines rev at insane rpm's; eg. F1 engines rev at 20000 rpm, top fuel dragster's redline is 9500 rpm. Not saying that these other factors are not important, they are indeed the main things between winning and loosing in somewhat closely matched cars.
Last edited by PlanoLeMans; Dec 25, 2016 at 03:08 PM.