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PostPosted: Tue Apr 25, 2017 8:58 pm 
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Location: Canton GA
xcidmigs wrote:
Bill,
Are you saying the later style sub frame bushing is different on the PPV? I tried to use the BMR sub frame inserts on my 2011 and found out that the OEM PPV ones I have are not what is used in the camaro/G8 chassis at all, those have big empty spaces in them which the BMR insert cleverly goes into to tighten things up. The PPV ones have no such empty space so maybe that's what you refer to? Sounds like there would be little to improve short of having worn ones replaced with new or a complete poly replacement which I don't think most would be interested in.


To clarify, what model year is your PPV?

The OE cradle bushing PN's are different between WM (2011-2013) and WN (2014-2017)....and what I'm going to determine is whether the later part will backfit to the "early" cars. I like and typically prefer OE solutions, unless there are provable improvements using something else. Not knocking any aftermarket supplier, BMR included--I've got some of their parts sitting on the shelf and how this works out may determine whether I use them.

xcidmigs wrote:
cal30_sniper wrote:
Whats the advantage to the 1LE control arms? Was the swap so you could run wider rims, or do they have some kind of improved suspension geometry?


They have a different stiffer rubber bushing and also have a 2nd attachment point for the newer style rear anti roll bar but still also has the original style so you can reuse if you wish since the newer bar is much wider and interferes with the OEM PPV rear brake caliper. Oddly GM sells them new as a "kit" which comes with both and is way cheaper than buying a new single OEM one.


I'm not sure what actual impact the bushing plays, but won't deny it's different from the sedan bushing, which is a service part, unlike on the Camaro arms. The arm kit wasn't about that bushing, rather it was about the bar mounting method for a 1LE conversion for an early (2010-2011) Camaro--they're the standard production control arm for all 2012-2015 Camaros, AFAIK, and are actually pretty inexpensive individually, but the kit with 2 arms is still best--especially compared to sedan rear control arms, which are much more costly.

That the control arms happen to fit the sedan chassis is almost an accident....the ONE thing yet to determine (Maurice is working on this) is to determine whether my eyeballs did not deceive me when I stated that the position of the lower shock mounting bolt holes is slightly higher on the Camaro arms (ie. raising the rear of the car slightly)--which CAN be an issue for a car that's already higher than many of us prefer it to be. If I wasn't so cheap, I would buy the 2015-2017 SS sedan rear lower control arms and not worry about it, but, as noted, the inner bushing is NOT like the setup used on the Camaro kit arms., if that matters.

Interesting book you linked.

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PostPosted: Sat Jun 24, 2017 7:14 pm 
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Joined: Mon May 01, 2017 12:47 am
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Location: Appleton, WI
Bill,
After reading all seven pages I believe that all I need to lower my 2012 PPV is a set of 2014 SS springs on my current struts set to stock 2012 alignment specs. Is this correct? Just making sure prior to ordering parts.

Thanks,
Jim

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Jim Chesnutt
1968 Camaro -my first car.
1995 Purple Pearl B4U Caprice
1995 Black/White 9C1 Caprice--NADACOP
1995 Purple Pearl L99 Caprice
2012 Alto Gray Metallic 9C1 Caprice--The HoDag-Solo axle back exhaust, improved racing OTR CAI intake.


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PostPosted: Sun Jun 25, 2017 12:23 pm 
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Location: Canton GA
I think any of the SS springs, 2014-2017 will work.

(2014 front)
http://www.gmpartsdirect.com/chevrolet/ ... oil-spring

(2015-2017 front) with MRC shocks, but they WILL fit
http://www.gmpartsdirect.com/chevrolet/ ... oil-spring

(2014 rear) NOTE: with 2014 rear sway bar configuration
http://www.gmpartsdirect.com/chevrolet/ ... oil-spring

(2015-2017 rear) NOTE: with 2015-2017 rear sway bar configuration and MRC shocks--again, they WILL fit
http://www.gmpartsdirect.com/chevrolet/ ... tion=right

There could be some "consumables"....considering the age & mileage of the car, going to the effort of changing the springs raises the question of whether any rubber parts (spring insulators) should be renewed, and there is the very real question of the condition of the front strut upper mount & bearing. Since the car is 5 model years "old", regardless of mileage, you would do well to consider replacing theses parts, as they are known to give up fairly quickly. The strut assemblies will be apart, and this would be a good time to replace them. I would even think about renewing the struts themselves, whether there may be aftermarket options for them, I've not really considered. Koni has struts, I believe, for example.

SS struts (2014) cannot be used on WM (2011-2013) PPV due to the difference in front knuckle clevis mount width. They MIGHT work with a spacer in the clevis to make up the width difference. There may be other differences I'm not aware of that would prevent their use, but I'm only saying this as a caution--they could be fine with the spacer mentioned, but I have not confirmed anything. 2015-2017 SS struts/shocks are an issue since they are MRC components, and would require integration of that entire system to work--not even possible to consider unless you've got an HSV pocketbook and could get the parts.

http://www.gmpartsdirect.com/chevrolet/ ... ommended=1

http://www.gmpartsdirect.com/chevrolet/ ... ommended=1

http://www.gmpartsdirect.com/chevrolet/ ... ommended=1

http://www.gmpartsdirect.com/chevrolet/ ... -insulator

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PostPosted: Sun Jun 25, 2017 4:21 pm 
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Joined: Mon May 01, 2017 12:47 am
Posts: 54
Location: Appleton, WI
Thanks Bill. I'll have to re-evaluate my parts list.

BTW-Still having a blast with the suspension you spec'd for NADACOP.

Jim

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Jim Chesnutt
1968 Camaro -my first car.
1995 Purple Pearl B4U Caprice
1995 Black/White 9C1 Caprice--NADACOP
1995 Purple Pearl L99 Caprice
2012 Alto Gray Metallic 9C1 Caprice--The HoDag-Solo axle back exhaust, improved racing OTR CAI intake.


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PostPosted: Mon Aug 28, 2017 2:23 am 
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Joined: Tue Mar 19, 2013 11:30 pm
Posts: 1335
Location: Canton GA
While there are multiple threads and posts that touch on this, I just wanted to add to others' observation about how much more pleasant the PPV is to drive with the changeover to SS springs and 2nd design (front) struts....the difference is remarkable.

I'm running a 19" wheel with 255/40 tires and 35-36 PSI all around. The car was not nearly as comfortable with the stock PPV springs, no matter what pressure I ran--sometimes it was as low as 32 PSI cold.

I did take measurements, and found the front was about 11/16" lower. The rear was affected by the modified rear lower control arms I made (from the 1LE arm kit), and the rear dropped by (I think) 1-5/16", which, in relation to the front, was too much. I reversed the oval-shaped "slugs" to raise the rear, and the final product is acceptable to me--I lost the reference measurement, so I can't give you a final number. I can take some pictures and post them--sort of waiting to see if any settling occurs.

I do still need to install the late (2015 & newer) rear sway bar, which is why I used the 1LE rear lower arms in the first place. It requires a modification to add new/stronger mounts for the cradle clamps for the sway bar.
viewtopic.php?f=18&t=1487&sid=bf454971c97a89f3f8c830052b7bac7c#p12971

I will start a new thread to document this, and I'll provide photos and as much info as possible for anyone who decides to do this mod.


Attachments:
File comment: before rear shock/spring installed
modified rear lower control arm for height adjustment.JPG
modified rear lower control arm for height adjustment.JPG [ 50.91 KiB | Viewed 476 times ]
File comment: undercar view showing both modified lower control arms
rear looking forward - lower arm mod.JPG
rear looking forward - lower arm mod.JPG [ 34.94 KiB | Viewed 476 times ]
File comment: originally the oval slugs were in the low position--car was too low, so the slugs were flipped to the position shown here, which raised the rear--still lower than with PPV springs
lower arm mod - raised.JPG
lower arm mod - raised.JPG [ 31.09 KiB | Viewed 476 times ]

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