Weight distribution on 10.5 tire cars
Moderators: David Lemmond, Dave Morgan
- John_Heard
- Site Admin
- Posts: 5734
- Joined: Thu May 12, 2005 11:20 am
- Location: Resume Speed, Kansas
- Contact:
Weight distribution on 10.5 tire cars
What's an ideal weight distribution, front/rear, cross, etc. on a 10.5 tire at 3450 lbs? What would be considered to be excessive rear weight? 51-52%?? How hard should you work to get rid of the left side weight the driver adds to the car?
- John_Heard
- Site Admin
- Posts: 5734
- Joined: Thu May 12, 2005 11:20 am
- Location: Resume Speed, Kansas
- Contact:
I talked to Dave and a few other guys on the phone a week or two ago and everyone was pretty much in agreement that you want to try and get the weight about as even as you can left to right, within reason. On my car it has to run @3450. Once I get some more time to work on it I'll now how much ballast I'll have to add back in.
In the races we run you would be a Big Block with power adder at 3450 lbs. Where do you race at?
My wife and I run in the VFN shootout at Wabash Valley (IN) and the OSCA (IN, KY, OH) in Fun Street and Mild Street. We could run at 3250 lbs. but still have a couple hundred to loose yet.
My wife and I run in the VFN shootout at Wabash Valley (IN) and the OSCA (IN, KY, OH) in Fun Street and Mild Street. We could run at 3250 lbs. but still have a couple hundred to loose yet.
Mark Nishwitz
Sin City Performance
ASE Master Tech.
Sin City Performance
ASE Master Tech.
- John_Heard
- Site Admin
- Posts: 5734
- Joined: Thu May 12, 2005 11:20 am
- Location: Resume Speed, Kansas
- Contact:
When I finally get the car going again it'll be racing with MAKO which runs at two tracks, Tulsa Oklahoma and Asbury Missouri in the Real Street class, which is also a 3450lb (BB/power adder) class. MAKO just got started this year really, the guys are already running sub 8.50's in Real Street. If you race VFN then you know my friend Mike Stark, Mike did the heads for my car.
- jones_performance
- Posts: 184
- Joined: Thu Jun 30, 2005 3:38 pm
- Location: upland, ca
- John_Heard
- Site Admin
- Posts: 5734
- Joined: Thu May 12, 2005 11:20 am
- Location: Resume Speed, Kansas
- Contact:
- jones_performance
- Posts: 184
- Joined: Thu Jun 30, 2005 3:38 pm
- Location: upland, ca
we made it ourselves, its based off a caltrac bar. we changed mounting points to change the instant center of the car, the leaf springs are fiberglass springs off an astro van we had to modify them pretty good to make em work. all materials are lightweight also, most of it is made out of aluminum and some chromoly with titanium bolts. we added a ton of weight to the car also to get it to trnasfer and hook, rear bumper alone was 150lbs.scperf wrote:Yeah, I know Mike. I'm going to have him warm up our Cleveland heads.
Sweet launch! Is that a ladder bar or cal track car?
Kevin
reweighed
Got back from the alignment shop today after rearranging things a bit
Weight is now 2733#
car balance
LR/RF 49.8
RR/LF 50.2
FRONT 51.9
REAR 48.1
LEFT 51.9
RIGHT 48.1
I feel better about this, now all i need is bring the left/right split closer
the alignment was not quite so good but hopefully Daves tubular A arms will help out
FL FR
CAMBER-2.3* -1.56*
CASTER 0.15* 0.17*
TOE 0.06" 0.06"
FRONT CROSS CAMBER-0.57*
CROSS CASTER 0.02*
TOTAL TOE 0.12
RL RR
CAMBER 0.03 -0.17
TOE -0.18 0.12
REAR CROSS CAMBER 0.20*
TOTAL TOE -0.06
THRUST ANGLE -0.29*
Weight is now 2733#
car balance
LR/RF 49.8
RR/LF 50.2
FRONT 51.9
REAR 48.1
LEFT 51.9
RIGHT 48.1
I feel better about this, now all i need is bring the left/right split closer
the alignment was not quite so good but hopefully Daves tubular A arms will help out
FL FR
CAMBER-2.3* -1.56*
CASTER 0.15* 0.17*
TOE 0.06" 0.06"
FRONT CROSS CAMBER-0.57*
CROSS CASTER 0.02*
TOTAL TOE 0.12
RL RR
CAMBER 0.03 -0.17
TOE -0.18 0.12
REAR CROSS CAMBER 0.20*
TOTAL TOE -0.06
THRUST ANGLE -0.29*
- John_Heard
- Site Admin
- Posts: 5734
- Joined: Thu May 12, 2005 11:20 am
- Location: Resume Speed, Kansas
- Contact:
chassis
we like 52% or more on the rear..left side/ right side helps the anti sway bar work better if equal..watch the front suspension for true equal ride heights..unequal distance induce torque roll and can upset what the rear bar is doing for you..of course longitudinal strength can't be overstressed in high hp applicatiuons..start with everything equal..if the car comes up with left tire higher you can cheat and drop that side a little to keep car flat at launch..or use shocks to slow rise up..hope i'm making sense to you..that flatter you keep the car, the faster it will go, and a lot straighter..
Who is online
Users browsing this forum: Bing [Bot] and 26 guests