weight issue

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Re: weight issue

Postby smsazzy » July 6th, 2011, 12:38 am

Then the effect of additional mass is even greater. If you are using 50 HP to push the air out of the way, and you only have 5 HP left to accelerate the mass, then the additional weight is hurting even more than if you were in a vacuum.
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Re: weight issue

Postby BLS » July 6th, 2011, 1:05 am

OK, one more. Once at top speed the additional mass will not hurt, until you have to decelerate, which will be the same effect. So, if you have reached the maximum speed, the point at which aero drag and all mechanical resistance is balanced by the available force, then the additional mass doesn't matter, except when you turn or slow down. As long as you are changing speeds or direction the additional mass will have the same effect...
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Re: weight issue

Postby Rolling Stone » July 6th, 2011, 10:16 am

kkapelke4 wrote:we will have to see!

I know one of the top runners over here weighs in the same as me and he is fast!!!

Oh yeah and Andrew if you drive my car and you are faster your damn straight its the weight!!!! Lol

11 days until shannonville... I am pumped and feeling very confident of the upgrades we have made!!!

Yes I would call installing a 1600 engine an UPGRADE..also MCd=A&W=Harveys x No MSGx root beer=+3 Horsepower according to my high school old papers......and Andrew was talking about if he goes faster in your car "BACKWARDS" its the weight LMAO....Just kidding Kevin:>)
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Re: weight issue

Postby hojo » July 6th, 2011, 10:53 am

my last race was october 2009 so obviously i'm a little giddy to get some exercise. hopefully it doesnt take too long to get into the groove of things, more importantly the car prep side of things between sessions.
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Re: weight issue

Postby jpetillo » July 6th, 2011, 10:57 pm

smsazzy wrote:Then the effect of additional mass is even greater. If you are using 50 HP to push the air out of the way, and you only have 5 HP left to accelerate the mass, then the additional weight is hurting even more than if you were in a vacuum.

Steve, we can look at the equations in many ways, and pull out lots of information. I think what matters, though, is time to distance. What the equation shows is that the difference in time to distance is less when adding weight than by subtracting the same percentage of HP when the other factors are included in the equation. If we ignore all the other terms, then the direct percentage rule works perfectly.

BLS is also correct. Adding weight always hurts in the ways that were mentioned - no one will argue that.

That the mass difference is equivalent to a HP difference by percentage is not quite the case in reality. That was the only point I was trying to make. It's not too difficult to calculate by how much, which I've done. I'd be happy to discuss it with anyone who cares to listen to my drivel - PM me.

I'm siding with Kevin from here on out - nice job! John
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Re: weight issue

Postby fvracer27 » July 7th, 2011, 11:22 am

When I was racing Karts on year a bunch of us in the off season ran a indoor karting league karts were I believe 13hp so they were similar to our Vees all momentum very little power. I was the heaviest driver with about 55lbs heavy. When I lost everyone told me I needed to loose weight when I won then said I have more traction :-/

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Re: weight issue

Postby problemchild » July 7th, 2011, 3:12 pm

Looking back over three decades of racing FV and FF, I drove cars that were 40-50 lbs overweight on a regular basis. I never had "good years" when driving in such rides. The best years, when I won races and championships, had strong Run-offs, etc, were when I was within 10-15 lbs of minimum weight. While there are many factors that go into a competitive package, there is no doubt that being overweight is a severe handicap, and is under valued by many. For the past decade or so, the ability to be within range of minimum weight, was the single biggest factor in selecting my race car. I can buy fast parts and fix anything on the car ..... but a heavy car is just a waste of time for those that want to be fast. Show me a fast driver that is significantly over minimum weight ..... and I'll show you a really fast driver if he was on minimum weight!
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Re: weight issue

Postby lbaconll » July 7th, 2011, 4:07 pm

I agree with Greg! As a "large " driver 250+ # who has on occassion run with the West Coast "National" fast guys and ran with them well. My current car and i come in at 1100+#. Probably going to drive Me out of Vee as i have several 2nds and close calls but have yet to score a win in a regional in 16 years. I know I can drive (2 wins with Russell Formula Mazda Series), and despite a rather nasty crash in 06, I still regularily run in top 3-5 here on West Coast. No whining , just frustrating to have a class I really like, but since I am never going to be 200# I;, 6'4", Fst or F Mazda calls. That being said, watch for a COMPLETE vee package coming up soon with Mysterian M2 set up for tall, portly driver, a total of 5 National Engines 4 Ron Chuck, 1 Peak Performance, years worth of spares and all the drawings-body molds for what was Mysterian Formula Vee! :mrgreen:
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Re: weight issue

Postby lbaconll » July 7th, 2011, 4:08 pm

I agree with Greg! As a "large " driver 250+ # who has on occassion run with the West Coast "National" fast guys and ran with them well. My current car and i come in at 1100+#. Probably going to drive Me out of Vee as i have several 2nds and close calls but have yet to score a win in a regional in 16 years. I know I can drive (2 wins with Russell Formula Mazda Series), and despite a rather nasty crash in 06, I still regularily run in top 3-5 here on West Coast. No whining , just frustrating to have a class I really like, but since I am never going to be 200# I;, 6'4", Fst or F Mazda calls. That being said, watch for a COMPLETE vee package coming up soon with Mysterian M2 set up for tall, portly driver, a total of 5 National Engines 4 Ron Chuck, 1 Peak Performance, years worth of spares and all the drawings-body molds for what was Mysterian Formula Vee! :mrgreen:
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Re: weight issue

Postby SR Racing » July 7th, 2011, 6:55 pm

If you do the math on just the acceleration issue: If both are putting down 52HP to the rear wheels (typical Vee area) A 1050 lb car will out accelerate at 1100 lb car from 70 to 90 mph by about .2 sec. In HP that equates to around 2 . This of course ignores aerodynamics, gear shifts, etc. As pointed out there are more issues with cornering and braking.

No matter how you cut it though, weight is a big issue.
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