The panty dropper - Page 19 - Lateral-g Forums

rixtrix1 · #**181** 09-20-2016, 11:19 PM

Read through your whole thread tonight. Very nice work on the car. Since you are still running leaf springs on the rear, have you cut out the top of the front spring hanger brackets to allow you to raise the front spring eye holes to help add some anti-dive to the rear suspension? Herb Adams recommended this decades ago when he offered the firewall braces like you have now. You will need to reshim the pinion angle afterwards, but that is a minor thing compared to what you have already done. I didn't notice your having done this so far, but it made a noticeable difference in handling in my car back then( not the ones in my sig.).

**WSSix** · #**182** 09-21-2016, 08:45 AM

Thanks for the kind words, Ric. Yes, I did the Herb Adams mod. I actually did it long ago before this latest round of updates. I have no idea if it made an improvement, but I like the way the car handles currently. I've been busy in other areas of life and with working on a friend's 69 Mustang. I hope to be making updates and further advancement on this project soon.

Thank you

Gscherer78ta · #**183** 09-22-2016, 05:21 AM

Quote:

Originally Posted by rixtrix1

Read through your whole thread tonight. Very nice work on the car. Since you are still running leaf springs on the rear, have you cut out the top of the front spring hanger brackets to allow you to raise the front spring eye holes to help add some anti-dive to the rear suspension? Herb Adams recommended this decades ago when he offered the firewall braces like you have now. You will need to reshim the pinion angle afterwards, but that is a minor thing compared to what you have already done. I didn't notice your having done this so far, but it made a noticeable difference in handling in my car back then( not the ones in my sig.).

Can you provide a link for this mod, or go through a more detailed explanation?
I've not heard of this mod and what I'm picturing in my head doesn't make any sense to me.

Sorry for the high jack OP

**WSSix** · #**184** 09-22-2016, 04:45 PM

No worries, Greg. The mod is simple. You remove the front leaf spring pocket off the car or spring, then you drill a hole 3/4 inch higher, cut the top of the pocket so the spring will still fit, and then bolt everything back together. Some people, me included, also weld another width of metal over the top of the pocket to reinforce it since the top was cut out of it.

Here you go
http://www.nastyz28.com/ubb/Forum10/HTML/007242.html

NOT A TA · #**185** 09-22-2016, 06:02 PM

Like Trey I was concerned about the strength with the window in the top. I made the window a bit larger on mine than most people need because I'm running spherical front spring eye bushings which allow more tip. In pics below you can see where I added metal to the sides etc. and the 3/4" difference in the higher hole. I panel bonded mine instead of welding, don't remember any particular reason why, might have been out of gas or something. Either way works fine to reinforce the pocket.

While on the spring pocket subject, try not to use the crappy china junk U nuts the restoration places sell under the OER or other house brand names when the pockets get reinstalled. If you can find CIP brand they're much better and you can identify them by the "CIP" stamped into them.

Gscherer78ta · #**186** 09-23-2016, 05:56 AM

Ok, I have seen that mod before, perhaps from John. I feel like I've been on an island or something.... It seems like this would effect ride height slightly. What else does it do for the car?

Have you guys installed a track bar with your leaf springs? Do you have any details on the impact that made to the car handling and the installation?

**WSSix** · #**187** 09-23-2016, 06:18 AM

This is supposed to help plant the rear as you apply throttle.

I don't have track bars. i would think it would hurt articulation of the rear suspension. John may be able to explain better if he sees this.

NOT A TA · #**188** 09-23-2016, 07:28 AM

Quote:

Originally Posted by Gscherer78ta

Ok, I have seen that mod before, perhaps from John. I feel like I've been on an island or something.... It seems like this would effect ride height slightly. What else does it do for the car?

Have you guys installed a track bar with your leaf springs? Do you have any details on the impact that made to the car handling and the installation?

Rear ride height changes about 3/8". I've been told the rear geometry is changed slightly which affects the instant center and weight applied to the rear wheels under acceleration for better traction. Rear anti-squat is increased.

It's referred to as the Adams mod but I believe Herbs chassis engineer Harry Quackenboss actually came up with it in the beginning. I've been aware of the mod since the 70's but never did it to any of my cars. Several years ago I had a conversation with Harry about it as well as the spherical front spring eye bushing mod and decided to try both on my car.

Gscherer78ta · #**189** 09-23-2016, 07:46 AM

John- what did you feel different once you did those mods? Did that mod improve corner entry, exit?

I believe the track bar helps keep the axle located in the center, although, I guess can't see where it would impede the articulation. With the track bar holding the axle in the center it would seem that the back would have more precision in following the front... Just a guess on my part

NOT A TA · #**190** 09-23-2016, 08:00 AM

When I was running my car one day at Sebring I had a instructor working with me and another guy in a Yellow Maserati taking turns playing lead/follow during a HPDE session. Instructor guy (BMW) said he could watch the rear of my car shift over the rear axle at turn in. If I hit the curbing hard at an apex the inside of the outside tire would slightly rub the inside of the inner fender. He suggested adding a locator such as a Panhard bar or Watts link to reduce the movement.