7500 series PENSKE double adjustable nitrogen filled shocks
#1
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Out of curiosity, anyone with experience on the 7500 series PENSKE double adjustable nitrogen filled shocks, like in GMMG's Camaro ZL1 SuperCar? Comparison to Koni DAs?
This one used 8700 series...
http://www.superchevy.com/features/c...n/viewall.html
http://gmmginc.net/programs/ZL1/
This one used 8700 series...
http://www.superchevy.com/features/c...n/viewall.html
http://gmmginc.net/programs/ZL1/
![](http://performanceshock.com/images/7500_co.jpg)
Last edited by libertyforall1776; 03-11-2014 at 08:42 PM. Reason: added link
#2
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Supposed to be some really good shocks from what I've read, but Im pretty sure you have to have them custom valved, and they have no warranty as well. Not to mention they are supposed to be really expensive.
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I think you have to take a 2nd mortgage..I have heard sam talk of them before. I think you would have to be serious to buy these. I"m pretty Sam has beat cars with these and him on Konis LOL
#4
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A little more than Koni DAs at $393/ea.:
http://www.howeracing.com/p-7663-7500-series-shock.aspx
http://www.penskeshocks.com/Stock_Car-7500_Series.php
http://www.penskeshocks.com/files/75...ies_Manual.pdf
http://www.penskeshocks.com/files/PS...OM_DRAWING.pdf
Here's some details:
Penske racing shocks are the top racing shock in the country. What has made these shocks number one is the fact they are infinitely adjustable. Many professional teams have shock engineers that do nothing but build their racing shocks. A Penske shock allows you to change pistons, oil, shim stacks, and gas pressure to the point you could dial yourself clear out of the ball park. We have worked with the Penske engineer’s and racing teams at the track to develop shock valving that suite the sprint car market. We have established what many have found to be a great starting point or base line.
Single adjustable 7500 series aluminum body shock. Compression valving is 5 on the right front and a 4 on the left front. Allows for the rebound to be adjusted from a 4 to a 4-6.
Left rear rebound can be adjusted from a 3-9 on rebound with compression is a 4 and is cockpit adjustable.
http://www.howeracing.com/p-7663-7500-series-shock.aspx
http://www.penskeshocks.com/Stock_Car-7500_Series.php
http://www.penskeshocks.com/files/75...ies_Manual.pdf
http://www.penskeshocks.com/files/PS...OM_DRAWING.pdf
Here's some details:
Penske racing shocks are the top racing shock in the country. What has made these shocks number one is the fact they are infinitely adjustable. Many professional teams have shock engineers that do nothing but build their racing shocks. A Penske shock allows you to change pistons, oil, shim stacks, and gas pressure to the point you could dial yourself clear out of the ball park. We have worked with the Penske engineer’s and racing teams at the track to develop shock valving that suite the sprint car market. We have established what many have found to be a great starting point or base line.
Single adjustable 7500 series aluminum body shock. Compression valving is 5 on the right front and a 4 on the left front. Allows for the rebound to be adjusted from a 4 to a 4-6.
Left rear rebound can be adjusted from a 3-9 on rebound with compression is a 4 and is cockpit adjustable.
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Obviously they're great shocks but way overkill for most of our applications, even autocross. If you're serious about racing your car go for it, you'd also have to adapt your top shock mounting point but once you did it be much easier to remove the shock to work on.
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I've beaten cars (in the same class, for National Championships) with up to TRIPLE Adjustable Penskes with lowly old Koni Sports.
I've had to revalve a number of Penske's on Corvettes because the valving was all jacked up (Penske builds to spec of the buyer, right or wrong). Ironically there are cars out there with 8300 Penske's and basically Koni valving.![Happy](https://ls1tech.com/forums/images/smilies/LS1Tech/gr_stretch.gif)
And in yet another case... a guy I know and race with who was super competitive decided he'd buy some on his '98 1LE in place of his Koni's. He went from battling me tooth and nail to winning one National event in the next 3 years. I begged him to change shocks back--but couldn't convince him. I know he didn't forget how to drive.... The only change was to the shocks.
I've had to revalve a number of Penske's on Corvettes because the valving was all jacked up (Penske builds to spec of the buyer, right or wrong). Ironically there are cars out there with 8300 Penske's and basically Koni valving.
![Happy](https://ls1tech.com/forums/images/smilies/LS1Tech/gr_stretch.gif)
And in yet another case... a guy I know and race with who was super competitive decided he'd buy some on his '98 1LE in place of his Koni's. He went from battling me tooth and nail to winning one National event in the next 3 years. I begged him to change shocks back--but couldn't convince him. I know he didn't forget how to drive.... The only change was to the shocks.
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www.stranoparts.com --814-849-3450
Results matter. Talk is cheap. We are miles beyond the success anyone else has had with the 4th gens, and C5, C6, C7 Corvettes,
10 SCCA Solo National Championships, 2008 Driver of they Year, 2012 Driver of Eminence
13 SCCA Pro Solo Nationals Championships
2023 UMI King of the Mountain Champion
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Penske quality is never in doubt....
But they are certainly a custom order item each set tailored to a specific class,vehicle,driver etc. so unless you have a firm handle on what you are desiring from your shocks(even then it might take some trial and error) I would look at a more proven off the shelf dampener IMO.
But they are certainly a custom order item each set tailored to a specific class,vehicle,driver etc. so unless you have a firm handle on what you are desiring from your shocks(even then it might take some trial and error) I would look at a more proven off the shelf dampener IMO.
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Figured I would bump this just in case you are still interested. You keep showing the universal shock in all your links. Penske makes a bolt in 7500 for the F body. No need to make or modify the mounts. I have some in my closet going on in a couple of weeks but I am to lazy to take a pic and link it. If you are still interested I might be able to. But as said they are super spendy. I only bought them because I found an awesome deal and my buddie who is a suspension guy for a racing team is sponsored by Penske. So he is going to help me set them up, they are looking good on the shock dyno so far.
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I'm not talking about installations, talking about the complexity to find the right rebound and compression settings. I have a full coil-over setup on my front and rear already. The hardest part is getting the proper settings for rebound and compression. That's all
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#15
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Finding the right settings on my konis were really easy for me.
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JDM AMG: Yes, your right, "too jarring, or too loose." It's a hard compromise with a QA1 to have a nice drag shock and also get it to be fairly decent for the street. My explanation in the post above was more an illustration of the complexity of multiple valving/settings that you can potentially have with the Penske. I guess I should have been more direct and simply stated, "Koni's are going to be a much better choice for the money and the ease of setting up." Basically, Sam Strano has it all figured out on the Koni setup ![Grin](https://ls1tech.com/forums/images/smilies/LS1Tech/gr_grin.gif)
I'm looking into possibly switching out to the Koni's in the future to take full advantage of all my suspension work.
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I'm looking into possibly switching out to the Koni's in the future to take full advantage of all my suspension work.
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Likely depends on the shock, and how its valved. Since the QA1s you have are drag shocks they will never feel right for handling, and finding an ideal setting should be pretty hard - either too loose or too jarring stiff right?
Finding the right settings on my konis were really easy for me.
Finding the right settings on my konis were really easy for me.
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Alright, I gotcha. One thing that will be nice after I get these on today is the adjustment is in the top of the shock shaft. I will have to drill a hole in the top of the body in the shock mount but no biggie. Then use a allen wrench to reach in for adjustments. Simple as popping the hood and a quick turn.
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My Corvette has custom valved Penske 7500s
My Camaro has out of the box Koni S/A's