GT4 - Unlocking the Power Potential!
#226
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The sprung hub setup worked well on the last 981 track car we did and I will look to back it up again with my car.
No drawbacks; my plan is to use a sprung hub clutch disc on the car to be sure we don't have any annoying chatter from the trans. Other than that, it's free power and torque.
No drawbacks; my plan is to use a sprung hub clutch disc on the car to be sure we don't have any annoying chatter from the trans. Other than that, it's free power and torque.
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#227
Three Wheelin'
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For 997 GT3, Porsche warned against switching to a lightweight single mass flywheel - something to do with harmonics backing out bolts. Lot of people did this switch and had blown engines and Porsche refused to cover it under warranty. Check these threads - https://rennlist.com/forums/997-gt2-...-flywheel.html
https://rennlist.com/forums/997-gt2-...cking-out.html
https://rennlist.com/forums/997-gt2-...-on-gt3-s.html
Any such issues on GT4?
https://rennlist.com/forums/997-gt2-...cking-out.html
https://rennlist.com/forums/997-gt2-...-on-gt3-s.html
Any such issues on GT4?
#228
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Just to reiterate, we try not to sell anything we haven't run on a race car in an endurance setting. Nothing in the GT4 architecture is foreign to our history on track. From our pulleys to our flywheels to the Guard LSDs, it's all been run well in excess of anything you have intended for it. The crank conversion will get the same abuse from my daily driving and going on track.
#229
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I figured I would just update you guys because it's been a week now; I'm waiting on bearings from Porsche that had to come out of Germany.
I walk by my motor every day with the same reaction I had when I pulled the engine off my parents' leaf blower and bolted it to a cracked go kart chassis i found. Do they make an emoji that conveys a feeling of "WTF did I just do?!"
I walk by my motor every day with the same reaction I had when I pulled the engine off my parents' leaf blower and bolted it to a cracked go kart chassis i found. Do they make an emoji that conveys a feeling of "WTF did I just do?!"
#230
Burning Brakes
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I figured I would just update you guys because it's been a week now; I'm waiting on bearings from Porsche that had to come out of Germany.
I walk by my motor every day with the same reaction I had when I pulled the engine off my parents' leaf blower and bolted it to a cracked go kart chassis i found. Do they make an emoji that conveys a feeling of "WTF did I just do?!"
I walk by my motor every day with the same reaction I had when I pulled the engine off my parents' leaf blower and bolted it to a cracked go kart chassis i found. Do they make an emoji that conveys a feeling of "WTF did I just do?!"
![Wink](https://rennlist.com/forums/images/smilies/wink.gif)
#231
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Photo attached in case anyone cares to see what happens when someone insane is let loose with knowledgeable employees and hand tools.
![](https://cimg0.ibsrv.net/gimg/rennlist.com-vbulletin/2000x1504/image_35f4727852ebb476bca3ad056f6fc0b2839359a3.jpeg)
#233
Nordschleife Master
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Beantown, I never even thought about that correlation. I had never driven a go kart at the time and when I asked what size motor goes on the back, everyone said 2.5HP. Across the garage was our leaf blower that had the 3.8L...I mean 5.0HP motor. Just as you say, the rest is history. Photo attached in case anyone cares to see what happens when someone insane is let loose with knowledgeable employees and hand tools.
#234
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#235
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#236
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Did I tell you how much I hate DFI engines again?!
#237
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Any interesting finds while disassembling the engine? I'm guessing you and DeMann are the first ones to see the insides first hand
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#238
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#239
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I know what you guys are seeing looks scary but it's not anything that should be cause for concern. They look like the top of every other DFI piston I've seen come from a motor that has been run. I haven't seen anything that is enough to spook me. If it was still 2009 I would say we were the only ones to have been inside these things but at this point a lot of people have been inside here. The 997.2 turbo motor is based on the 9A1 DFI motor so there are now several folks who have been inside these motors.
#240
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I know what you guys are seeing looks scary but it's not anything that should be cause for concern. They look like the top of every other DFI piston I've seen come from a motor that has been run. I haven't seen anything that is enough to spook me. If it was still 2009 I would say we were the only ones to have been inside these things but at this point a lot of people have been inside here. The 997.2 turbo motor is based on the 9A1 DFI motor so there are now several folks who have been inside these motors.
Thank you.