GT3 engine ruined by single mass lightweight flywheel
07-28-2014, 11:26 AM
#61
Keep in mind. My swap was done with OEM Porsche parts. This is why the CPO covered it. What I found out from Alex at Sharkwerks at the time of purchase, is that a lot of folks will do the LWFW but neglect to also do the RS pulley in conjunction. Maybe this is where the problem started for the original thread owner 
All I know is that Both Bramen Miami, (where I purchased)and Hennessey Atl verified the CPO. I have had the car for 4/5 years and never had the first issue. I would lay blame for the engine problem either from the installation itself or possibly using the stock pulley instead of the RS pulley/bolt kit.
All I know is that Both Bramen Miami, (where I purchased)and Hennessey Atl verified the CPO. I have had the car for 4/5 years and never had the first issue. I would lay blame for the engine problem either from the installation itself or possibly using the stock pulley instead of the RS pulley/bolt kit.
07-28-2014, 04:43 PM
#62
07-30-2014, 11:23 PM
#63
Rennlist Member
Keep in mind. My swap was done with OEM Porsche parts. This is why the CPO covered it. What I found out from Alex at Sharkwerks at the time of purchase, is that a lot of folks will do the LWFW but neglect to also do the RS pulley in conjunction. Maybe this is where the problem started for the original thread owner All I know is that Both Bramen Miami, (where I purchased)and Hennessey Atl verified the CPO. I have had the car for 4/5 years and never had the first issue. I would lay blame for the engine problem either from the installation itself or possibly using the stock pulley instead of the RS pulley/bolt kit.
All I know is that Both Bramen Miami, (where I purchased)and Hennessey Atl verified the CPO. I have had the car for 4/5 years and never had the first issue. I would lay blame for the engine problem either from the installation itself or possibly using the stock pulley instead of the RS pulley/bolt kit.
07-24-2016, 10:08 AM
#65
You guys can call BS all you want, but the RS 3.8 and RS 4.0 are the least reliable engines of all GT3 mezgers, and many of the failures are attributed to loosening fasteners. Install LWFW - risk goes up.
As long as you're ok knowing that, have fun. I put a LWFW on my 4.0.
If the engine is out, it's good practice to re-torque the cam bolts too.
As long as you're ok knowing that, have fun. I put a LWFW on my 4.0.
If the engine is out, it's good practice to re-torque the cam bolts too.
Do you sure that´s about the sinlge mass flywheel reasoned...
Is the 3.8 with dual mass flywheel much more reliable?
Same reliability as 3.6 GT3 engine?
Thanks
07-24-2016, 02:47 PM
#66
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Yes the 3.8L and 4.0L are both single mass (not dampened) flywheel and both suffer from a harmonic that can do a number of things (spit out cam bolts, flywheel bolts, break oil pump gears etc...).
Our ATI harmonic dampener helps to reduce the torsional harmonic vibrations in the crank shaft.
A couple points of confusion. We're not talking about balancing the crank shaft, we're talking about reducing the twisting oscillations (torsional harmonics).
PM or email for more info!
Our ATI harmonic dampener helps to reduce the torsional harmonic vibrations in the crank shaft.
A couple points of confusion. We're not talking about balancing the crank shaft, we're talking about reducing the twisting oscillations (torsional harmonics).
PM or email for more info!
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Dundon Motorsports
Gig Harbor, WA
253-200-4454
jamie@dundonmotorsports.com
www.dundonmotorsports.com
Facebook.com/dundonmotorsports
Instagram @dundon_motorsports
07-24-2016, 10:48 PM
#67
Around 09/10 the specification for torquing the flywheels on GT3 race cars changed to a torque angle 30 nw first then 90 degrees or so I really can't remember the exact figures, anyway it was previously 65 flbs or so when I check it with a electronic torque wrench that reads all factors the new spec was 104 lbs ft.
On a 10 X 1.25 10.9k bolt that is a lot of load but that is what Porsche does.
regards
On a 10 X 1.25 10.9k bolt that is a lot of load but that is what Porsche does.
regards
08-19-2016, 08:28 PM
#69
08-24-2016, 10:15 PM
#71
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Robocop305 (01-20-2023)
08-24-2016, 10:24 PM
#72
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7.1 GT3 doesn't suffer as severely as the 7.2 (3.6L vs 3.8L) but it's still there...
http://www.dundonmotorsports.com/996-997-harmonic-dampe
http://www.dundonmotorsports.com/996-997-harmonic-dampe
08-25-2016, 11:55 AM
#73
Rennlist Member
Can this be installed without removing the engine?
