New to me GT2 Complete Build and rescue of a Garage Queen.
#121
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Can you two help me a little on suspension:
6gt2 with JRZ RS pro, 2.5frt/2.0r with 8 degree caster, with Cup/monoball suspension, 275/335 on CCWs driven through Motorsport diff. Currently TPC sway bars are set soft, but might want to increase them in accordance to other changes. Current aero is 4" splitter @2" off ground and large Getty wing.
What I am unhappy with is the spring rate/setup. The previous owner for some reason (maybe to make better on street) reduced spring rates to 400/600 with unknown but very soft secondary springs. I know the car was initially ran with 600/800's. Can you two give me subjective feedback on your spring changes and what you did or did not like? Currently the car is too soft for my style as I'm used to stiff TB's and lighter cars.
I totally am in agreement with the inferior internal components. Our rods have the same short comings of the 993's. Not as if we didn't know these had problems 15 years ago. I'm replacing the more robust rods on my 3.3 and my GT2 is putting down 550 rwhp on these questionable rods!
6gt2 with JRZ RS pro, 2.5frt/2.0r with 8 degree caster, with Cup/monoball suspension, 275/335 on CCWs driven through Motorsport diff. Currently TPC sway bars are set soft, but might want to increase them in accordance to other changes. Current aero is 4" splitter @2" off ground and large Getty wing.
What I am unhappy with is the spring rate/setup. The previous owner for some reason (maybe to make better on street) reduced spring rates to 400/600 with unknown but very soft secondary springs. I know the car was initially ran with 600/800's. Can you two give me subjective feedback on your spring changes and what you did or did not like? Currently the car is too soft for my style as I'm used to stiff TB's and lighter cars.
I totally am in agreement with the inferior internal components. Our rods have the same short comings of the 993's. Not as if we didn't know these had problems 15 years ago. I'm replacing the more robust rods on my 3.3 and my GT2 is putting down 550 rwhp on these questionable rods!
http://www.youtube.com/watch?v=ATd0q...ature=youtu.be
Last edited by powdrhound; 10-22-2013 at 01:37 AM.
#122
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Can you two help me a little on suspension:
6gt2 with JRZ RS pro, 2.5frt/2.0r with 8 degree caster, with Cup/monoball suspension, 275/335 on CCWs driven through Motorsport diff. Currently TPC sway bars are set soft, but might want to increase them in accordance to other changes. Current aero is 4" splitter @2" off ground and large Getty wing.
What I am unhappy with is the spring rate/setup. The previous owner for some reason (maybe to make better on street) reduced spring rates to 400/600 with unknown but very soft secondary springs. I know the car was initially ran with 600/800's. Can you two give me subjective feedback on your spring changes and what you did or did not like? Currently the car is too soft for my style as I'm used to stiff TB's and lighter cars.
I totally am in agreement with the inferior internal components. Our rods have the same short comings of the 993's. Not as if we didn't know these had problems 15 years ago. I'm replacing the more robust rods on my 3.3 and my GT2 is putting down 550 rwhp on these questionable rods!
6gt2 with JRZ RS pro, 2.5frt/2.0r with 8 degree caster, with Cup/monoball suspension, 275/335 on CCWs driven through Motorsport diff. Currently TPC sway bars are set soft, but might want to increase them in accordance to other changes. Current aero is 4" splitter @2" off ground and large Getty wing.
What I am unhappy with is the spring rate/setup. The previous owner for some reason (maybe to make better on street) reduced spring rates to 400/600 with unknown but very soft secondary springs. I know the car was initially ran with 600/800's. Can you two give me subjective feedback on your spring changes and what you did or did not like? Currently the car is too soft for my style as I'm used to stiff TB's and lighter cars.
I totally am in agreement with the inferior internal components. Our rods have the same short comings of the 993's. Not as if we didn't know these had problems 15 years ago. I'm replacing the more robust rods on my 3.3 and my GT2 is putting down 550 rwhp on these questionable rods!
Luke
Sounds like a good setup on your cR would love some photos. As for your questions.
As we all know spring rate is a function of track design on a super smooth track like COTA or NOLA we would change out our springs for 1000/1200 and reset the sway to 1 notch and run a little lower not he tire presure.
However most of our time is spent on rougher tracks so we did a fair amount of setup changes from track to track. However a happy medium seems to have occurred when AJ and his crew dropped the springs from 600/800 to 500/800 a larger than normal differential however it resolved the bump issues. We also installed a bump steer kit from GMG did wonders on the curve we are looking at less than 17/1000 over 1.5 inch bump travel in the front and less in the rear. Being this tight we were able to maintain a tight camber curve even with the Porsche designed lack of an upper control arm in the front.
Reducing the front springs brought on some issues with power on oversteer so we lowered the rear ride height by almost 1/4 inch and increased rear toe from .10 to .12 and added some length to the rear lower control arms from RSS bringing everything into balance.
So I would agree your existing springs might be to soft and the smoother the track the more you can bump them up however if you want a car that can be driven on virtually every track with great results not optimum but great you might look into our setup.
Please post some photos and let me know if this answers your questions. I like a stiff ride with fast set and this car has it as configured.
#123
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Thanks for responses. Almost everyone I run with here are either mod'd 7gt3/rs or stockish 7tt's so I really appreciate the feedback. I even got feedback once just plopping into the race seat, "wow your car moves alot dropping in". My air cars aren't anything incredible but at 2200lbs I run 22/28's for street and the GT2 certainly seems softer even with the 18's. Fact (sadly), my GT2 rotates and sets slower then my Mustang AIX does on the NT01's.
I will get some photos posted soon, but as a "builder" I must admit that outside of maintenance I'm not responsible for this build. I've ventured over from PP to spend more time in this specific forum in regards to the GT2. So with winter coming it might be slow, but will start a thread.
Its driving nuts enough to consider a different car for track use, BUT I LOVE the GT2
How is the engine coming along?
I will get some photos posted soon, but as a "builder" I must admit that outside of maintenance I'm not responsible for this build. I've ventured over from PP to spend more time in this specific forum in regards to the GT2. So with winter coming it might be slow, but will start a thread.
Its driving nuts enough to consider a different car for track use, BUT I LOVE the GT2
How is the engine coming along?
#124
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Thanks for responses. Almost everyone I run with here are either mod'd 7gt3/rs or stockish 7tt's so I really appreciate the feedback. I even got feedback once just plopping into the race seat, "wow your car moves alot dropping in". My air cars aren't anything incredible but at 2200lbs I run 22/28's for street and the GT2 certainly seems softer even with the 18's. Fact (sadly), my GT2 rotates and sets slower then my Mustang AIX does on the NT01's.
I will get some photos posted soon, but as a "builder" I must admit that outside of maintenance I'm not responsible for this build. I've ventured over from PP to spend more time in this specific forum in regards to the GT2. So with winter coming it might be slow, but will start a thread.
Its driving nuts enough to consider a different car for track use, BUT I LOVE the GT2
How is the engine coming along?
I will get some photos posted soon, but as a "builder" I must admit that outside of maintenance I'm not responsible for this build. I've ventured over from PP to spend more time in this specific forum in regards to the GT2. So with winter coming it might be slow, but will start a thread.
Its driving nuts enough to consider a different car for track use, BUT I LOVE the GT2
How is the engine coming along?
As for the engine we are down to the open case and parts are ordered. Hope to get started with assembly late November when all parts have arrived. Giving some thought to going with the Mahle 3.8 or 4.0 buckets still. Any experience out there on these.
#125
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Good Afternoon my Friends
Its been a while since I had time to post here and we have made a lot of progress on the motor. This is posted to help catch folks up on the issues.
After tear down has been completed and we discovered that the entire chain of events was caused by a defective or defectively installed left side timing chain gear. This low stress gear should never have failed and is something that we did not have access to unless a complete tear down was done and of course at less than 20,000 street miles I did not think of doing that.
This timing gear is in a majority of our cars and in speaking to several shops no one has come across this particular failure. if you look at the break you will note the discoloration which is either due to the heat of being flexed for many miles or perhaps the factory used heat to do the initial install. Since this is unlikely as the factory and even after market shops use a press to install these we are left with the conclusion that as the miles passed this piece flexed constantly on each revolution and eventually failed.
![](https://rennlist.com/forums/members/vonschmidt-albums-new-to-me-gt2-saving-a-garage-queen-picture23605-timing-break-3.jpg)
A closer view shows the material actually seems to have an abundance of carbon on it in what should have been solid metal again suggesting that this was a long term latent defect.
Unfortunately no mater what the cause the effects of this breaking were spectacular. As the gear gave way it allowed the chain to slip from its normal position and swing around for a few rotations bashing everything in reach before falling to the bottom of the housing This in turn caused a chain reaction resulting in an intermediate shaft failure, bent valves, damaged pistons and heads.
The process of the rebuild is already underway and I will try and post some photos of the work already done and that which is ahead so those that are interested can see.
Bottom line we hope to have the new improved motor on line by Mid February and then see what the improvement in my skills as a drive from the Spec Boxster translate to with all this power.
![](https://rennlist.com/forums/members/vonschmidt-albums-new-to-me-gt2-saving-a-garage-queen-picture23603-timing-break-1.jpg)
Its been a while since I had time to post here and we have made a lot of progress on the motor. This is posted to help catch folks up on the issues.
After tear down has been completed and we discovered that the entire chain of events was caused by a defective or defectively installed left side timing chain gear. This low stress gear should never have failed and is something that we did not have access to unless a complete tear down was done and of course at less than 20,000 street miles I did not think of doing that.
![](https://rennlist.com/forums/members/vonschmidt-albums-new-to-me-gt2-saving-a-garage-queen-picture23604-timing-break-2.jpg)
This timing gear is in a majority of our cars and in speaking to several shops no one has come across this particular failure. if you look at the break you will note the discoloration which is either due to the heat of being flexed for many miles or perhaps the factory used heat to do the initial install. Since this is unlikely as the factory and even after market shops use a press to install these we are left with the conclusion that as the miles passed this piece flexed constantly on each revolution and eventually failed.
![](https://rennlist.com/forums/members/vonschmidt-albums-new-to-me-gt2-saving-a-garage-queen-picture23605-timing-break-3.jpg)
A closer view shows the material actually seems to have an abundance of carbon on it in what should have been solid metal again suggesting that this was a long term latent defect.
Unfortunately no mater what the cause the effects of this breaking were spectacular. As the gear gave way it allowed the chain to slip from its normal position and swing around for a few rotations bashing everything in reach before falling to the bottom of the housing This in turn caused a chain reaction resulting in an intermediate shaft failure, bent valves, damaged pistons and heads.
The process of the rebuild is already underway and I will try and post some photos of the work already done and that which is ahead so those that are interested can see.
Bottom line we hope to have the new improved motor on line by Mid February and then see what the improvement in my skills as a drive from the Spec Boxster translate to with all this power.
![](https://rennlist.com/forums/members/vonschmidt-albums-new-to-me-gt2-saving-a-garage-queen-picture23603-timing-break-1.jpg)
![](https://rennlist.com/forums/members/vonschmidt-albums-new-to-me-gt2-saving-a-garage-queen-picture23606-timing-break-4.jpg)
Last edited by Vonschmidt; 11-25-2013 at 05:53 PM. Reason: Add Photo
#126
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Definitely one of the most interesting threads on a spiritual successor to my car. Nice.
My 930 engine issues/rebuild - several years back: https://rennlist.com/forums/911-turb...-pictures.html
My 930 engine issues/rebuild - several years back: https://rennlist.com/forums/911-turb...-pictures.html
#127
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Got an offer from a fellow RL member that I track with to drop the parts off and he will ask his metallurgy folks to take a look at this failure. What a great forum that's exactly what I'm looking for.
Don't have any illusions that even if defective there will be much recourse the car is way outside Warntee however it might help porsche look at this part and insure future runs address any issues discovered to insure that others don't suffer the same fate.
Thanks Tor see you next week.
Don't have any illusions that even if defective there will be much recourse the car is way outside Warntee however it might help porsche look at this part and insure future runs address any issues discovered to insure that others don't suffer the same fate.
Thanks Tor see you next week.
#128
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Unfortunately, I'm pretty sure Porsche could care less, a fact solidly proven by their response to the coolant pipe fiasco.
#129
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Of course its kind of like my F-450 with 63,000 miles completely blowing up internally and ford basically telling me its my fault., we have been waiting four weeks for the tear down and review, And then a week later I had my Escalade fail and the Caddilac dealer gave me a Escalade to drive and had the cracked piston replaced in less than 7 days. No cost, no hassle.
Last edited by Vonschmidt; 11-28-2013 at 06:58 PM.
#130
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My husband and I are looking for a GT2 he has driven for years and has a 2010 cup. I have an Audi but we have always wanted one of these.
Sounds like yours is too highly modified to drive on the street so we would not go that far but just the raw power is a real turn on.
If you have a GT2 and a Spec Boxster how do you chose which to drive at a track event and what is your daily driver.
Sounds like yours is too highly modified to drive on the street so we would not go that far but just the raw power is a real turn on.
If you have a GT2 and a Spec Boxster how do you chose which to drive at a track event and what is your daily driver.
#131
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^boxster spec for racing GT2 for DE
if u want 997GT2, i have one for sale.
if u want 997GT2, i have one for sale.
#132
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Ran into a snag with the build and am looking for a new part that porsche does not seem to have in the country now and estimated arrival time in US is Jan 14th.
We need the right side Guide rail PNA 996 105 166 70
Does anyone have one they would be willing to sell me.
We need the right side Guide rail PNA 996 105 166 70
Does anyone have one they would be willing to sell me.
#133
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[QUOTE=Texgirl;10987228]My husband and I are looking for a GT2 he has driven for years and has a 2010 cup. I have an Audi but we have always wanted one of these.
Sounds like yours is too highly modified to drive on the street so we would not go that far but just the raw power is a real turn on.
If you have a GT2 and a Spec Boxster how do you chose which to drive at a track event and what is your daily driver.[/
The last question first. The GT2 is a DE car you would need to install a cage and look for a class. With all the CF that's just a crime. If you were to buy one most of the changes we have made coud be implemented and retain its street driving, primarily just putting some rubber back in the suspension and a stree alignment.
The Spec Boxster is a great class for racing and if you guys have any interest I'll be at TWS in College station tthis weekend with the SPB. You can come by and see for yourself the fun this little car can provide.
As a spec class all the cars running have to be the same so it really comes down to driver ability, some luck, and race craft. Doubt your cup car driver would be interested but perhaps we can entice you to join our ranks. As for the cup car driver the SPB is a great learning tool it really keeps you on your toes in corners as you have no HP to make up for mistakes. Makes you a better high HP car driver by far.
Sounds like yours is too highly modified to drive on the street so we would not go that far but just the raw power is a real turn on.
If you have a GT2 and a Spec Boxster how do you chose which to drive at a track event and what is your daily driver.[/
The last question first. The GT2 is a DE car you would need to install a cage and look for a class. With all the CF that's just a crime. If you were to buy one most of the changes we have made coud be implemented and retain its street driving, primarily just putting some rubber back in the suspension and a stree alignment.
The Spec Boxster is a great class for racing and if you guys have any interest I'll be at TWS in College station tthis weekend with the SPB. You can come by and see for yourself the fun this little car can provide.
As a spec class all the cars running have to be the same so it really comes down to driver ability, some luck, and race craft. Doubt your cup car driver would be interested but perhaps we can entice you to join our ranks. As for the cup car driver the SPB is a great learning tool it really keeps you on your toes in corners as you have no HP to make up for mistakes. Makes you a better high HP car driver by far.
#135
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The motor is going back together great. I have not posted photos for a while just trying to find an good online storage media that I can link to any thoughts.
As for the car we will be loading the car and taking it down to Houston where they should be able to start putting the final parts back on and reinstall the motor itself. I'll try and post a few photos tommorow.
As for the car we will be loading the car and taking it down to Houston where they should be able to start putting the final parts back on and reinstall the motor itself. I'll try and post a few photos tommorow.