Re: Weighing Car?
[Re: ahy]
#1242792
06/01/12 03:23 AM
06/01/12 03:23 AM
|
Joined: Jan 2003
Posts: 27,466
So Cal
autoxcuda
Too Many Posts
|
Too Many Posts
Joined: Jan 2003
Posts: 27,466
So Cal
|
this was done on Hotchkis' digital scales without driver before Hotchkis TVS and 1.12" T-bars were added (from .99" T-bars) . Just a baseline and for ride height measurement changes. Car at this measurement compared to what I have now: Before (pics below) / Now- Cast iron head/Edelbrock aluminum heads
- Cast iron 4bbl intake/MP M1 intake
- Cast iron 340 HP exhaust manifolds/TTI 1 3/4" step headers
- Cast iron water pump/aluminum water pump
- OE type alternator/Denso 102mm mini alternator
- OE type brass radiator/4 core aluminum Champion radiator
- Two OE Hi-Lo horn/One plastic aftermarket horn
- No trans cooler/HD 11"x5.5" trans cooler
- Modified stock type suspenion with .99" T-bar/Full Hotchkis TVS with 1.12" T-bars
Last edited by autoxcuda; 06/01/12 03:35 AM.
|
|
|
Re: Weighing Car?
[Re: autoxcuda]
#1242793
06/01/12 05:34 AM
06/01/12 05:34 AM
|
Joined: Jan 2005
Posts: 4,862
the frozen wastes...
Pale_Roader
Swears too much
|
Swears too much
Joined: Jan 2005
Posts: 4,862
the frozen wastes...
|
Curious...
I've always had my cars weighed at the local dump. You drive in, weigh the car, dump your crap, drive out, weigh again and they calculate the difference and charge you. Mine let me just drive in, weigh the car and leave, and from my own experience, they are pretty accurate. Same type as you find at the track.
I was wondering, now that i'm aware ov my awful weight bias and trying to fix it, would just driving the front wheels onto the scale, getting a reading, then backing the rear wheels (in the same place) and getting a reading work for accurately measuring bias? I'm sure if there was no traffic my scales would let me do that. If i were to get as much ov the car onto the scale (wheels closest to the middle) as possible... then repeat on the rear, would that be worth anything? Perhaps not to accurately add up to a whole, but maybe just to ballpark my bias? I'm pretty sure my scale wouldn't even charge me to do that.... i'd just get the usual funny looks...
|
|
|
Re: Weighing Car?
[Re: astjp2]
#1242796
06/02/12 08:33 AM
06/02/12 08:33 AM
|
Joined: Feb 2010
Posts: 1,645
Phila. Pa.
Mattax
top fuel
|
top fuel
Joined: Feb 2010
Posts: 1,645
Phila. Pa.
|
Yes and no.
If this is a competition car, even part time, you will be constantly improving and tuning it. Corner weights are very useful. For someone simply upgrading to a sporty suspension for general use, probably not. Simply copy an established package, and unless that is not satisfactory, weights are interesting to share but not going to be needed.
When I first bought the car, I did not weigh it. Frankly, although I wanted to, in retrospect it wouldn't have been that helpful. It was a tired /6 car being switched to v-8; springs, shocks, rear axle all were being swapped. So there was no baseline to work from. I did use the Brookland Book's magazine reprints to get an idea of what the stock v-8 and notchbacks balanced at.
That said, after it was together, I scaled the car whenever opportunity arose. At the dragstrip at first (total weight). Later at shops that had scales, and that's where I could do front-back.
Now when is most useful? First when deciding on changes. Besides weighing the car, you can use the scales to check leaf spring rate. Weigh the car as it will be used. Load up the driver's area with weight if you can't be sitting in it. Set the ride hieght where you want it. Some people will adjust the t- bars to equalize the corner weights, others may prioritize equalizing right-left ride heights. Whichever, make sure the sway bars are not pre-loaded (unless you want that for some reason).
|
|
|
Re: Weighing Car?
[Re: Pale_Roader]
#1242797
06/03/12 11:10 AM
06/03/12 11:10 AM
|
Joined: Jan 2003
Posts: 5,388
Pikes Peak Country
TC@HP2
master
|
master
Joined: Jan 2003
Posts: 5,388
Pikes Peak Country
|
Quote:
I was wondering, now that i'm aware ov my awful weight bias and trying to fix it, would just driving the front wheels onto the scale, getting a reading, then backing the rear wheels (in the same place) and getting a reading work for accurately measuring bias? I'm sure if there was no traffic my scales would let me do that. If i were to get as much ov the car onto the scale (wheels closest to the middle) as possible... then repeat on the rear, would that be worth anything? Perhaps not to accurately add up to a whole, but maybe just to ballpark my bias? I'm pretty sure my scale wouldn't even charge me to do that.... i'd just get the usual funny looks...
That's what I do most the time. Its a decent start and better than nothing.
|
|
|
Re: Weighing Car?
[Re: TC@HP2]
#1242798
06/04/12 08:23 AM
06/04/12 08:23 AM
|
Joined: Jan 2005
Posts: 4,862
the frozen wastes...
Pale_Roader
Swears too much
|
Swears too much
Joined: Jan 2005
Posts: 4,862
the frozen wastes...
|
Quote:
Quote:
I was wondering, now that i'm aware ov my awful weight bias and trying to fix it, would just driving the front wheels onto the scale, getting a reading, then backing the rear wheels (in the same place) and getting a reading work for accurately measuring bias? I'm sure if there was no traffic my scales would let me do that. If i were to get as much ov the car onto the scale (wheels closest to the middle) as possible... then repeat on the rear, would that be worth anything? Perhaps not to accurately add up to a whole, but maybe just to ballpark my bias? I'm pretty sure my scale wouldn't even charge me to do that.... i'd just get the usual funny looks...
That's what I do most the time. Its a decent start and better than nothing.
Thats about all i can ask for... I can get a good deal on having the car scaled (as i just did), but for this gutter-budget i think that will be about the last time. Ballparkin' it can go a long way...
|
|
|
|
|
