10-27-2011, 01:25 PM | #826 |
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Re: Make it handle
Ackattack glad you made it through all this. Yes, some caster will help. You really should go out and try the autocross at a Goodguys event, it's a bunch of fun. As far as the 'driver mod' I agree 100%. But, I'm not the guy for that thread. I have a tough enough time getting around the coarse myself. It would be nice to get Mary Pozzi or Mike Meyer to chip in, but honestly, there not into trucks to much. Here's a laugh. In Columbus, I was watching one of the vendors run, in a car that I considered to be a 'bad choice' for autocross or short coarse competition. He loves the car, but I thought, still not a great choice. Then, I walked back to our pit area and realized that I built a TRUCK. What a bonehead! Lesson learned. Build whatever turns you on and have some fun.
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10-27-2011, 06:20 PM | #827 |
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Re: Make it handle
Hey rob I was wondering if you will do alignments in your shop?
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10-28-2011, 12:41 PM | #828 |
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Re: Make it handle
I was just looking at ridetech's website and in their complete suspension package: http://www.ridetech.com/store/suspen...0-level-3.html
they include tall spindles. Then, when you click on the "included" tab, it shows standard spindles. I didn't see any more on thier website on the tall spindles for our trucks, but would be interested in learning more. |
10-28-2011, 01:20 PM | #829 |
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Re: Make it handle
Sure, by appt. We are open sat from 9am to 2pm, that seams to be most convient for alignments.
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10-28-2011, 01:24 PM | #830 | |
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Re: Make it handle
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10-28-2011, 01:38 PM | #831 | |
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Re: Make it handle
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10-28-2011, 04:23 PM | #832 |
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Re: Make it handle
Hey rob I just finished the article street trucks did on you very nicey done.. I have a question about a watts link set up.. Does it matter how long the arm is for the center pivot? I know it should be centered on the rear end but how long(or tall) per say should that center bar be? I hope I explained that right...
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10-29-2011, 11:44 PM | #833 |
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Re: Make it handle
Man, It only took me a week and a half to read this thread.
Just a thought I've had while reading all this. I think all of Robs recomendations are awesome and maybe a bit modest. I can really appreciate a humble guy, no **** talkin, just go out and prove it on the track. I've been looking for the right rear suspension for my truck for the last few weeks when a friend pointed me to this thread. I ordered a fatbar kit from Rob last week and think he is the type of guy I want to support. He is supporting all of the forum members with all his insider info!!! Awesome work Rob!!! Now, I do have another question that I havent seen any talk about. Sorry to derail from the suspension geometry but i'm wondering about rearend differentials. I've read that an eaton posi unit possibly breaking loose on exit and that a truetrack is more suited to accelerating out of the corners. Anyone care to give their opinions on this? Rob, do you mind sharing what your trucks have? Thanks |
10-30-2011, 12:52 AM | #834 | |
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Re: Make it handle
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10-30-2011, 03:18 AM | #835 |
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Re: Make it handle
Exactly his point..... these are trucks!
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10-30-2011, 06:18 AM | #836 |
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Re: Make it handle
Horsepower TV did a program on ProTouring/Autocrossing. The event was at Nashville Speedway. While all of the action shots were various cars, several times they showed a really nice dark green '67 C10 that was on the ground. I guess autocross is getting more popular.
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10-31-2011, 11:42 AM | #837 | |
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Re: Make it handle
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10-31-2011, 11:53 AM | #838 | |
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Re: Make it handle
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10-31-2011, 11:58 AM | #839 | |
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Re: Make it handle
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10-31-2011, 12:00 PM | #840 |
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Re: Make it handle
The rumor is that the coverage of the RTMC (Run to music City) was a test to find out the interest level. There may be coverage next year of a 9 event series. We'll have to wait and see.
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10-31-2011, 12:56 PM | #841 |
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Re: Make it handle
Is this silimar to the RTTx events (Run To The Coast, Hills, etc...)? I went to a RTTH event a couple of years ago & really enjoyed it.
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10-31-2011, 03:19 PM | #842 |
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Re: Make it handle
yes. same thing. We went to RTTC, run to the coast.It was a great event. Autocross, speed/stop, and 2.2mi. roadcoarse. It was cool to see some cars excell in one event over another, and the few cars that could do it all.
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10-31-2011, 07:03 PM | #843 |
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Re: Make it handle
Very clear thanks agian..
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10-31-2011, 10:06 PM | #844 |
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Re: Make it handle
Rob asked me to post some pointers about rear thrust angle, toe and camber in my alignment thread. While walking mindlessly with the kids Trick or Treating tonight I thought it may be proper to cut and paste it to his thread too...
Per Rob's request: I'll try to make this simple. Thrust angle is the relationship between the rear axle and the centerline of the chassis. As I had stated before, Thrust should be zero. If the centerline of the axle is 90* to the centerline of the chassis it will be zero. Just like the front toe, toe out is negative and toe in is positive. If the thrust angle points to the left of the chassis centerline the thrust angle is negative, to the right, positive. This angle is the average of the two rear toe angles which is not to be confused with total toe which is, well, the sum of the two toe angles. If the thrust angle is negative the truck will want to rear steer to the left causing the truck to want to go right. You would have to add constant left hand input causing the "dog tracking" look. Of course, the opposite would be true if the thrust angle were positive. Camber can have an effect on tracking too. No matter wether its front or rear. Lets stick with rear camber. A vehicle will tend to steer toward the more vertical or positive cambered tire. Lets try a small quiz...if my left rear camber is 0* and my right rear is negative .75* which way would the rear of the car wanna steer?.... .... .... If you said left then you are correct. It would want to rear steer left and you would have to steer left to cancel it out. Both camber angles must closely match so as to not cause a "pull" or "drift". Caster has NO affect on the rear axle...unless, in the off chance, you have a four wheel steer car. If that was the case it would closely follow the rules of front caster. Although I won't go into 4W steer it did remind me of a good point. Rear angles have a greater effect on how a vehicle tracks. Anyone who has driven a forklift knows they can be very twitchy.
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11-01-2011, 10:51 AM | #845 |
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Re: Make it handle
Noted about the miss info on the web site.... thanks for busting my balls Rob..
Another note on locking diffs; I have run a bunch of different brands of lockers on the streets and I can tell you for street driving and getting the best perfornace diff you can... the detroit Tru-Trac is the stuff. If you dont do a tru trac then use the Eaton Pro Posi. |
11-02-2011, 04:51 PM | #846 |
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Re: Make it handle
Here are a few shots of my project.
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11-04-2011, 12:07 AM | #847 |
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Re: Make it handle
This thread should be required reading for anyone that is wrenching on their truck, period. I have 2 questions, first on the spindles. Does he position of the the pin on the spindle change the effects of the caster? Not saying it changes caster, but will a dropped spindle and a stock spindle feel the same at an equal caster setting?
Second, rear track bars have been discussed, and where the front mount should be located in the vertical. What about moving the mounts outboard or inboard? Seems like wider would be more stable.
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11-04-2011, 12:19 PM | #848 |
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Re: Make it handle
One more question regarding rear sway bars, why not mount it through the frame rail? I've seen it done for off road and monster truck designs. Just have to use the kind with removable arms and weld in mounts in the frame rail.
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If no one knows what you're doing, they can't tell you you're doing it wrong HG's Dream Car Build - Shelby Cobra Kit Build your own adjustable track bar 71 Long Fleet C/10 72 Jimmy 4x4 (Junkyard Jimmy) HG's Plow Truck '78 K35 Dually Bigass Farm Truck HG's thread of miscellaneous stuff |
11-04-2011, 12:51 PM | #849 |
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Re: Make it handle
HGS notes
Go here and look at the 2nd post down. http://67-72chevytrucks.com/vboard/s...=412449&page=4 |
11-04-2011, 06:24 PM | #850 |
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Re: Make it handle
I'm really interested in the low-buck caster mod to the lower control arm that was referenced earlier in this thread. Did it ever work?
I am a big believer in caster, and I am ready to do the spindle swap on my '64 (already swapped it over to a '79 suspension). I would really be interested in doing this mod while I've got it apart.
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