Paul C
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Posts posted by Paul C
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in todays sizes about a 225/78/R15 1st number is the width of the tire in mm. The 2nd number is the tire's profile presented in a percentage of the width, and the 15 is the rim size. R is for radial, which is the sidewall construction.
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On 6/29/2020 at 6:37 AM, MCfan said:
Ron,
GM selected and installed one of ten possible front coils and one of 3 possible rear coils in each individual first gen Monte based on the total weight of that vehicle including all options. It had nothing to do with whether that car had a "small block" or "big block" engine as is commonly thought. You can find the "Free Height" listed for each possible spring in the table below (shown in the second column from the right).
If you have a Build Sheet for your car, check Box 13 for the front spring Assembly Code that was selected for your particular car. If you have a reasonably optioned 454 car, the code will likely be GQ which has a free height of 18.13 inches. While the part number is also shown in that table for each spring, I don't believe it is stamped on the spring (unlike Moog springs which do have a stamped PN).
You can also use a micrometer or digital caliper to measure the diameter of the coil wire (clean it first) and compare that to the spec given in the table. The overall free height may change over years of use but the coil wire diameter won't. Good luck.
DTret: Great information. I'm working on a frame off and converting to coilover suspension. I was trying to get a starting point for the spring rates, but here they are. Would you have the information on the shock travel?? Thanks / Paul
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On 9/19/2020 at 8:03 PM, Lou said:
Good idea with the cinder blocks and 4x4's. I did the same with my last Chevelle.
Did you modify the "A" chassis?? I'm looking at A-Arms and spindle on the front with coilovers and coilovers on a 4 link rear
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When you apply the power, the pinion wants to roll up, because of the torque being applied to the rear tires. My guess is that your wheel hop is a result of the upper control arms having worn bushings. There is a thing called anti squat. As the control arms go thru their arcs, when the upper & lower control are not the same length, the pinion angle will change. This can be controlled by several ways, frame height or the angle of the control arms when the car is in a neutral condition. Some one wrote that adding air to their air shock contributed to the wheel hop. That's because the air shocks raised the neutral frame height, which changed the pinion angle through the unequal lengths of the control arms, which changed the anti squat, which contributed to the wheel hop. Hope this helps
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Thank you guys for all the replies. I have built race cars since I was a kid, I have an engineering background, and started welding when I was 12. . My 1st totaled rebuild was a 1970 MC in 1972 I was 17 at the time. Turned out great, really enjoyed that car (several trophies from the local strip). Update: I'm building a rotisserie before I seperate the body & frame. I hope to have it finished in a week or so. I bought the tires I want for the rear, Michelin 315/35/20, a little over 12" wide tires. My plan is to take the frame, have it blasted, then build a jig for all the mounting points. At that time, I will cut off the rear section, fabricate the tubs, then a new rear frame section, with a 4 link suspension and coil over springs. I haven't decided on the rear, either a 12 bolt or a 9" Ford. Using a 9" Ford would allow me to pickup a pumpkins from the NASCAR guys for a few hundred $$. Then I'll go to work on the front suspension. I'm watching Copart for the donor Escalade, but if anyone knows about a totaled 2006 or up Escalade for sale, drop me a line. My email is pecarman@yahoo.com I'll take some photos and post them when I get a chance. I hope to have a clean, sleek, sleeper when I finish. Also I could figure how to reply to each response, any help would be appreciated. Thanks
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I'm a new member and just bought a 1971 MC. The previous owner stripped the car down and then gave up. I have all the parts (I think) except the engine & tranny & front fenders and inner pans. I plan a frame off rebuild and I want to tub it. I plan to fab a rear frame section to allow the for the larger tubs. Has anyone ever done this?? My plan is to buy a totaled 2006 or up Cadillac Escalade for a donor car, use the 6.2 engine & tranny. Any thoughts
4 wheel disc brake line plumbing
in Brakes and Suspension Tech
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Montebob 70, how did the conversion work out?? What size rotors did you use front vs rear? I'm getting ready to do the same.