Welds Wheels really improve Et?

J

justinschmidt1

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Oct 27, 2007

#1

• Oct 27, 2007

• #1

I know welds are supposed to be light.. Lets just say my stock wheels are 45 pounds with tires...Im not really sure how much lighter welds....but how about we say 30 for the front and 35 for the rear. Total savings of 50 pounds.

Would I really drop 1/2 a second of my et?

 

Winters98GT

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Oct 27, 2007

#2

• Oct 27, 2007

• #2

its not body weight..... its rotational weight. The savings is bigger than just losing 50 pounds of body weight.

As far as half a second....... I think you have your numbers mixed up. A general rule of thumb is that for every hundred pounds you lose, you will improve your ET by .1, or one tenth, not a whole second.

 

N

Nuge

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Oct 27, 2007

#3

• Oct 27, 2007

• #3

I had always heard that

100#'s sprung weight = 10#'s unsprung weight = 1 tenth of a second.


Never proved but it but I've heard it multiple times from multiple people. Maybe that just makes it a popular old wives tale.

 

Green&GoldGT

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Oct 27, 2007

#4

• Oct 27, 2007

• #4

10 pounds of rotational weight is a tenth. But thats a general rule because you're not going to lose that much et with the same weight in a faster car. Lighter wheels will let your car accelerate faster and help with weight transfer on launch, but theres more gain when you have drag suspension.

 

2

2002BLGT

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Dec 18, 2003

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Oct 27, 2007

#5

• Oct 27, 2007

• #5

justinschmidt1 said:

I know welds are supposed to be light.. Lets just say my stock wheels are 45 pounds with tires...Im not really sure how much lighter welds....but how about we say 30 for the front and 35 for the rear. Total savings of 50 pounds.

Would I really drop 1/2 a second of my et?

Click to expand...

probably 1-2 tenths .....ET streets compared to drag radials will get you another tenth or 2

 

twogts4us

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Oct 28, 2007

#6

• Oct 28, 2007

• #6

Nuge said:

I had always heard that

100#'s sprung weight = 10#'s unsprung weight = 1 tenth of a second.


Never proved but it but I've heard it multiple times from multiple people. Maybe that just makes it a popular old wives tale.

Click to expand...

No, not a wive's tale (or internet myth) - I've heard the same as well - not the golden rule per si, but it's a good estimate.

 

O

o0akoni0o

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Oct 28, 2007

#7

• Oct 28, 2007

• #7

welds with the right tires and a good drag suspension setup will definitely knock off a couple tenths.

 

J

justinschmidt1

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Nov 22, 2007

#8

• Nov 22, 2007

• #8

If I swapped all 4 rims/tires for welds I would drop over 40 pounds of rotational mass....so if 10lbs=.1 with rotational why wouldnt I drop .4 if I drop 40 lbs rotational mass?

 

Tim2002GT

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Nov 22, 2007

#9

• Nov 22, 2007

• #9

justinschmidt1 said:

If I swapped all 4 rims/tires for welds I would drop over 40 pounds of rotational mass....so if 10lbs=.1 with rotational why wouldnt I drop .4 if I drop 40 lbs rotational mass?

Click to expand...

There are alot of factors that effect ET's. With the lighter rotational weight, more tire spin could occur. I think 2 to 3 tenths would be a nice gain with the weight loss.

 

J

justinschmidt1

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Nov 22, 2007

#10

• Nov 22, 2007

• #10

Tim2002GT said:

There are alot of factors that effect ET's. With the lighter rotational weight, more tire spin could occur. I think 2 to 3 tenths would be a nice gain with the weight loss.

Click to expand...

I dont think id spin slicks with my auto and stock stall

 

d98gt

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#11

• Nov 22, 2007

• #11

It's hard enough to spin regular tires in an auto npi

 

J

justinschmidt1

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Nov 22, 2007

#12

• Nov 22, 2007

• #12

d98gt said:

It's hard enough to spin regular tires in an auto npi

Click to expand...

haha..youd think...lower your car with sportlines add gears and a bunch of bolt ons and youll think differantly...

Seriously..I cant get any traction now.

 

d98gt

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#13

• Nov 22, 2007

• #13

I lack the lowering springs, though I wouldn't consider those bolt ons out of hand or anything.

Our cars have similar mods to say the least

I'm also somewhat looking at some welds to run and have found quite a bit locally. I've realized that it's not going to be all that cheap, especially once I purchase the tires for them aswell.

 

'13_ImpactBlue_GT

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Nov 23, 2007

#14

• Nov 23, 2007

• #14

justinschmidt1 said:

haha..youd think...lower your car with sportlines add gears and a bunch of bolt ons and youll think differantly...

Seriously..I cant get any traction now.

Click to expand...

What gears are you running now?

 

d98gt

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Nov 24, 2007

#15

• Nov 24, 2007

• #15

According to the sig, 3.73s

 

J

justinschmidt1

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Nov 24, 2007

#16

• Nov 24, 2007

• #16

yea, im running 3.73s. I ran my car last night and I couldnt hook at all...I guess ive got a lot of factors working against me though.. Car is pretty much slammed in the front, no weight in the rear, street tires, 40 degrees out.

I ran 14.1 @ 102 ....with a 2.25 60

But by the normal rule of thumb where .1 in 60 foot =.2 off et my car could have ran a 13.6 at 102 with a 2.0 60

Not bad for a npi auto with some bolt ons

I pretty much rolled off the line cause I was spinning all night when I got on it.


Kinda wish I went with 4.10s...but then again its my DD