Need more traction,
you need more weight on the wheels.
So add sandbags to the rear.......
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| Performance update; Bill D.'s '64 Valiant https://slantsix.org/forum/viewtopic.php?t=58352 |
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| Author: | billdedman [ Thu Sep 17, 2015 9:51 pm ] |
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Quote: Bill,
What's the ride height at the front and rear of the rocker panels? Is there any video from outside the car with it going down the track? I ask as my initial guess is that the back of the car is too high. I appreciate all the good advice! Someone asked about tire pressure: I tried 16 pounds, first, in these bias-ply slicks, and then, 12 pounds. It seemed tp bite a little better with the 12... Maybe that needs to be 10... We'll see. |
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| Author: | billdedman [ Thu Sep 17, 2015 9:58 pm ] |
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No video, YET, but one is coming soon. I bought a new Sony CX-230 video camera, and will start using it, when I figure out some of its vagaries..... like, how to turn it off... |
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| Author: | emsvitil [ Fri Sep 18, 2015 1:22 am ] |
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Need more traction, you need more weight on the wheels. So add sandbags to the rear.......
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| Author: | billdedman [ Fri Sep 18, 2015 4:14 am ] |
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I have considered adding weight, but have, SO FAR decided that the "100-pounds equals one car-length" addage would defeat my current "methodology," but, I think it may be worth a try. Sure beats spending another grand for (wider) wheels and tires.... lol! Thanks fpr the suggestion! Bill. scratching his head, in a suburb of Little Rock... |
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| Author: | Charrlie_S [ Fri Sep 18, 2015 5:07 am ] |
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Quote: I have considered adding weight, but have, SO FAR decided that the "100-pounds equals one car-length" addage would defeat my current "methodology," but, I think it may be worth a try...
Put the passenger in the trunk. 
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| Author: | billdedman [ Fri Sep 18, 2015 6:55 am ] |
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Charrlie, That would be ME... and I weigh 200 pounds; there go two car-lengths... 
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| Author: | madmax/6 [ Fri Sep 18, 2015 8:58 am ] |
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10 lbs works best for my car but it is ALOT lighter.Mark |
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| Author: | mopars biggest fan [ Mon Sep 21, 2015 2:04 am ] |
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Bill u need a duster!!!!!!! 
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| Author: | billdedman [ Mon Sep 21, 2015 5:40 am ] |
| Post subject: | Chassis weights... |
Tommy, A Duster has more room for bigger slicks, that's for sure, BUT, my '64 Valiant only weighs 2,680 pounds, with a roll-bar AND sub-frame connectors... A Duster would be several-hundred pounds heavier, I think... I believe that I am lucky to have the genertion II A-Body.... I'll take the weight-saving over the bigger wheel-wells, any day... 100 pounds equals 1 car-length, or, so they say...  Bill |
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| Author: | Junior [ Mon Sep 21, 2015 5:49 pm ] |
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100lbs may equal a car length but letting off the gas even momentarily is about the same. if you can get it to hook then you can always turn up the boost to make up the difference. |
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| Author: | kesteb [ Mon Sep 21, 2015 8:33 pm ] |
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I suspect that you need to adjust the caltracs properly. How are they adjusted now? |
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| Author: | billdedman [ Mon Sep 21, 2015 9:20 pm ] |
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The driver has lots of experience with CalTracs, so I am letting him take care of which hole to put the bolt for the traction bar, in and how much (if, any,) pre-load to dial-in. His car that he ran for 17 years was an A/SA NHRA Stocker that pulled the front wheels about 3 feet high on every launch, and had 1.31-second 60-foot times, so, I let him turn the wrenches on the suspension... I am (obvioiusly) no good with that stuff.... |
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| Author: | billdedman [ Mon Sep 21, 2015 9:43 pm ] |
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Quote: 100lbs may equal a car length but letting off the gas even momentarily is about the same. if you can get it to hook then you can always turn up the boost to make up the difference.
I probably cried "wolf" too early with this problem; the car only had three full-throttle passes on it when I wrote about the situation, so I am going to wait until I have more experience with the phenomenon, before I do snything substantial with it, like adding weight, or putting wider wheels on it. Just about 15 minutes before the run that got really squirrelly, a car in the lane I ran in, hit the guardrail, so it may have been the track, I dunno...I'm just thankful the O-rings seem to be holding... I run copper O-Rings (the ones that came with the Isky rental/kit,) as "centered" as I could make them, on top of the FelPro head gasket "metal fire-rings", with 220,000 psi ARP studs at 90 pounds-feet of torque, applied in 5-pound increments after 50 pounds-feet. C ylinder compression, after the trip home, was 165 on 3 cylinders, 170 on one and 175 on the other two.
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| Author: | mopars biggest fan [ Wed Sep 23, 2015 12:39 pm ] |
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Screw the cow bars go get a pinion snuber and super stock springs if that don't work 2 100 lb bags of sand over the ass |
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| Author: | billdedman [ Thu Sep 24, 2015 1:01 am ] |
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I'm about to insall a line-loc and a brake-line pressure gauge; then, an exhaust back-pressure gauge abd a trasmission pressure gauge, so, I am going to be plenty busy in the next dew weeks ( I work S-L-O-W...) Maybe, by the time I get all that done, the strip might be a little better... I can hope.... LOL! Bill, in Conway, Arkansas |
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