Tracking a 996
#16
Nordschleife Master
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My understanding is that a stock suspension is too "compliant" for slicks (or even r-compound DOT tires). What happens, because of the higher grip, the car exhibits more body roll, thus changing the alignment (specifically camber) more while the car is cornering. Because of this, you'll get fewer runs out of r-compound tires (because you'll cord the outside edge) than with an upgraded suspension. Throwing out $1,500 tires rapidly gets real old, real fast.
#17
Drifting
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Bingo part two! Just take a look at the mistakes that the VW Cup made going with sticky tires and stock sets ups. These kids hammer into slow corners all sideways and the cars just hop like rabbits (no pun) through the slow corners as the stock set up just gives up, tucks under and, boing, boing, boing we go. Stupid. All a marketing dept idea instead of common sense from the racing dept at VOA. The same thing happens with half way measures and 996's. Because slicks are cheaper then a full blown racing set up ($10K and up), people try the slicks and wonder why they get uneven heating and rip the crap out of the tires after one day.
#18
Nordschleife Master
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I've been heavily racing my 3.4 996 for a year now in 2 series with somewhere in the vicinity of 80 hours of race time. No issues to date. I've installed the X51 oil pan, a 3rd radiator, and occasionally I even change the oil though it's usually 4 weekend in between (Mobil 1, 15-50)....
Synchros, on the other hand, have been an issue for me. Maybe it's because I came from a cup car and shift hard, but I'm about to replace 2nd and 3rd for the second time......
#19
Nordschleife Master
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JR...makes a good point. The gearbox in the 996 is not built to withstand the abuse of hard tracking (i.e., racing). It is treated as a consumable.
#22
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-td
#23
Burning Brakes
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The track car that I have for sale now had engine oil pressure issues before I owned it..Enough to scatter an engine.
What makes the biggest differences to these engines is G forces, once real suspensions and sticky tires are added oil pressure issues begin. After I enhanced the oil system, included the accu-sump kit and went full external with oil filtration and -12 hoses.
We see the exact same characteristics time and time again with track cars and failed engines from oil starvation. I have determined that engine oil temperatures are elevated to a point that proves to be a catalyst for making the issues worse... Its not uncommon for a tracked M96 engine to see an oil temp of 260F, if that engine uses a generic oil then the engine will probably be compromised. I found that the choice of oil made a huge difference, especially on the track.
It takes the right preparation to make a 996 a dedicated track car, once the proper issues are addressed they can be just as reliable as JR mentions above.
What makes the biggest differences to these engines is G forces, once real suspensions and sticky tires are added oil pressure issues begin. After I enhanced the oil system, included the accu-sump kit and went full external with oil filtration and -12 hoses.
We see the exact same characteristics time and time again with track cars and failed engines from oil starvation. I have determined that engine oil temperatures are elevated to a point that proves to be a catalyst for making the issues worse... Its not uncommon for a tracked M96 engine to see an oil temp of 260F, if that engine uses a generic oil then the engine will probably be compromised. I found that the choice of oil made a huge difference, especially on the track.
It takes the right preparation to make a 996 a dedicated track car, once the proper issues are addressed they can be just as reliable as JR mentions above.
Last edited by Jake Raby; 01-11-2015 at 11:56 PM.
#28
Rennlist Member
#29
Burning Brakes