Harmonic Dampers
#16
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What about the .1Rs with the single mass flywheels.
#17
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Thanks guys for all the info. Keep it coming…
#18
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Do these things or have these things been proven to actually fix the cause of the cam bolt problem or was this simply speculation? Shop had a car with one on it that had cam bolts backed out... fwiw.
They've been replacing the actuators and/or bolts with a higher yield spec and loctite have had zero issues reoccurring.
They've been replacing the actuators and/or bolts with a higher yield spec and loctite have had zero issues reoccurring.
TLDR: I don't think the damper is a cure all for the cam bolts, but I think it's still a reasonable upgrade for these cars.
Last edited by Auto_Werks 3.6; 03-03-2023 at 06:00 PM.
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sirringo (03-03-2023)
#19
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Paging John; you just welded the bolts on my car, right? Can't back out that way.
#20
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Robocop305 (03-06-2023)
#21
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I’ve seen a few cars where the description of the fix said the bolts were safety wired. I’m assuming that would require different bolts to allow for a drilled head to run the wire through. I can try and dig through my notes to see where it was done.
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jonwb (03-06-2023)
#22
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Hi all - reading up on the usage of aftermarket harmonic dampers as a potential prevention for cam bolts backing out on 7.2s with LWFWs. Is this piece from Dundon the only one available for our cars? $2.5k shipped is an utterly insane price for a balancer!
https://www.dundonmotorsports.com/pr...armonic-damper
https://www.dundonmotorsports.com/pr...armonic-damper
Partnr is: 996 102 115 93
But not available at the moment.
The 2.5k$ price tag is even more ridiculous when you compare to the usual ATI prices for other cars.
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Robocop305 (03-06-2023)
#23
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The Sharkwerks fix is proprietary. Alex understandably won't divulge the info. I bought the Dundon ATI unit 2-3 years ago. Think it was $1000 at the time?? Prices have obviously gone up along with the value of the cars.
#24
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Dundon stuff is expensive, I'm not saying you're wrong. When I bought my damper I thought it seemed expensive, so I contacted ATI and priced out having their custom department make one for the GT3. At the time the savings of buying direct from ATI was small enough that it made zero sense to be out on my own doing a design when the Dundon part existed on the shelf. I believe it was also goign to take months to have a part in hand. Anyone can buy dampers from ATI at any time... there are probably at least several reasons why Dundon is able to keep selling theirs.
#25
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There isn't magic here. I'm sure what Sharkwerks does works. They aren't the only ones that figured this out. You need to secure, modify, or change the holding properties so the bolts don't back out. If people are worried about this they need to work with a shop that builds enough of these engines that they know what they are doing and how to address it. FWIW, I don't think sharkwerks, and I know BBI don't use the dampers.
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#26
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No issues with my .1 with a LWFW. 30k miles plus.
#27
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can anyone enlighten me on why the 4.0 clutch and LWFW plus the ATI damper is a better package than replacing with stock 3.6/3.8 components? I get the LWFW benefits of quicker revving but doesn't the heavier ATI damper kind of eliminate the benefit? It seems like the 4.0/LWFW combo + ATI damper cost 2x if not closer to 3x as much as the stock 3.6/3.8 parts, and you can still vibrate your cam bolts loose. If one was to get the cam bolts secured also, well, that would be thousands more. Would love to hear the cost /benefit rationale for this "upgrade" from those that are smarter than I am.
#28
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can anyone enlighten me on why the 4.0 clutch and LWFW plus the ATI damper is a better package than replacing with stock 3.6/3.8 components? I get the LWFW benefits of quicker revving but doesn't the heavier ATI damper kind of eliminate the benefit? It seems like the 4.0/LWFW combo + ATI damper cost 2x if not closer to 3x as much as the stock 3.6/3.8 parts, and you can still vibrate your cam bolts loose. If one was to get the cam bolts secured also, well, that would be thousands more. Would love to hear the cost /benefit rationale for this "upgrade" from those that are smarter than I am.
#29
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So, for those inclined to add a damper as a preventative measure - If you're of the view that we're not sure whether any of these fixes does in fact fix the issue, will you still visually inspect with some regularity? And if so, why not just bolster up with better hardware and call it a day ? Not slighting any approach; genuinely asking because I'm still considering what to do myself.
#30
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So, for those inclined to add a damper as a preventative measure - If you're of the view that we're not sure whether any of these fixes does in fact fix the issue, will you still visually inspect with some regularity? And if so, why not just bolster up with better hardware and call it a day ? Not slighting any approach; genuinely asking because I'm still considering what to do myself.
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Robocop305 (01-21-2024)