NewOrleansLT1

This is some good info thought I'd share http://www.camaro-transam.com/foro/s...ad.php?t=16871

96capricemgr

iTrader: (1)

You know a well respected member here that I met at the track once, told me he didn't believe weight was really all that big a deal. Probably felt that way because his 600+lbs lighter car was slower in the quarter though.

NewOrleansLT1

Lmao wow. Maybe his setup isn't correct...

fex77k

iTrader: (2)

Weight is everything. 100 percent reliable. The only thing that sucks is the price for the strut/spindle setups and the light wieght brake packages. My motor is nothing special, just a mild 396 I daily drove in a convertible. In my drag car it runs 9.6@136 my mph is low compared to the heavier cars, but I'm not pushing my motor much.

mdacton

iTrader: (3)

depends on where its located as well......

if you have a 3200# car at 60/40 and a 2700 lb car at 46/54


These things can get very complex and many rules are not set in stone, lots of variables.

Puck

iTrader: (17)

If a car is heavier then mine, the weight doesn't matter and they should run me anyway. If its lighter, then its a huge deal and I get the hit .

Drag racing 101!

fex77k

iTrader: (2)

I'll give anyone the hit, won't matter in the 1/8.

quik95lt1

iTrader: (7)

hopefully next year ill be near the actual weight limit for my class was 3275 this year hoping to be at 3175 next year running alot faster


also......not to try to be a dick but the math in that thread does not work correctly.......the weight/hp thing is not linear math due to the weight variable changing.......ie at 3000lbs and 300hp theory in that thread says 10lbs is worth 1hp........well ok pull out 100lbs now your at 2900 and 300hp.......now 1hp is worth 9.6lbs....follow me?

GIZMO

iTrader: (8)

Add the fact that you are trying to push all that weight through the air.......

BIGCAT7274

losing weight definitely helps. but it does affect cars differently based on the combination.

TwoFast4Lv

iTrader: (8)

It make a difference for sure. As long as you can control your traction that is

TwoFast4Lv

iTrader: (8)

you are right in there on MPH

96capricemgr

iTrader: (1)

and air is another thing that has a non-linear effect, the faster a car is the more it needs aerodynamic attention.

Meen95z

iTrader: (26)

I always heard 100lbs is a tenth or car length. Dont know if thats true, ill find out soon.

GIZMO

iTrader: (8)

Or more HP........

fex77k

iTrader: (2)

My car has ran 8.2 on a BBC, but since it still has stock body lines I won't run the 1/4 on BBC. After 160 it gets a bit out of shape.

quik95lt1

iTrader: (7)

i got more mph than that but i cant run that fast lol

ehhh......it is when they are running slower down in that 12-14 sec range, the faster you go the less that works....100lbs out of my car is worth about .07 now from what i gander

fex77k

iTrader: (2)

Definately.

The faster your times the more this fall off.

flame

iTrader: (13)

Any rotating weight is worth a lot more than non

96capricemgr

iTrader: (1)

and then within rotating weight the further that weight is from center or the faster it spins matters.
IMO this is where a nice bit of the gains from a good 9.5" converter comes from, they are a lot lighter than a stocker and the weight a lot further from center than something like a driveshaft AND they are spinning faster than the crank at least until locked up in third.

Without going and weighing them let's say a 9.5" converter is 10lbs lighter(I believe this a lowball number) that 10 lbs was also 5"-6" from crank centerline and had to accelerate with the engine in every gear. Think about the amount of energy used to take that 10lbs to go from 2000 to 7000 in a couple seconds or whatever you spend in first gear and then 5000-7000 in each of 2nd and third.