TonyG > New Race Car Build Thread
09-14-2012, 06:13 AM
#92
Rennlist Member
While Orca is legendary, this will be better. Orca shows it's age. Especially in the Aero and cockpit depts. Subscribed!
09-14-2012, 06:40 AM
#93
Nordschleife Master
Very cool. I dig the floor. Must be extremely light with cockpit/rear end design.
As usual there is several ways to skin a cat and in this case I can really not understand why you want to lower the trans. First off the drive shaft angles are screwed up already on a lowered 951 so to correct that the trans should be raised.
Secondly, aerodynamics and getting the total weight of the car lower to the ground should be a priority.
Lowering the trans will restrict how much you can lower the car in total. By raising the trans you can also make sure the exhaust does not protrude underneath the car. This means you can 1) lower the car more and get a greater mass further to the ground compared to a higher car with a lower trans.
2) Greatly increased effectivness of aerodynamics since you now can do a full flat floor very close to the ground.
3) You can also route the exhaust above the rear suspension with a raised trans
4) You can encapsulate the gearbox and do a flat flor and diffusor at the rear.
As usual there is several ways to skin a cat and in this case I can really not understand why you want to lower the trans. First off the drive shaft angles are screwed up already on a lowered 951 so to correct that the trans should be raised.
Secondly, aerodynamics and getting the total weight of the car lower to the ground should be a priority.
Lowering the trans will restrict how much you can lower the car in total. By raising the trans you can also make sure the exhaust does not protrude underneath the car. This means you can 1) lower the car more and get a greater mass further to the ground compared to a higher car with a lower trans.
2) Greatly increased effectivness of aerodynamics since you now can do a full flat floor very close to the ground.
3) You can also route the exhaust above the rear suspension with a raised trans
4) You can encapsulate the gearbox and do a flat flor and diffusor at the rear.
09-14-2012, 08:55 AM
#94
Rennlist Member
^This.
09-14-2012, 08:58 AM
#95
Three Wheelin'
If possible, I would appreciate it if you could show some detail on how the fenders attach. I am also interested i how you approach the aero question. After Nasa Nat's we are making plans for Miller and the coming season that include a wide body and a flat bottom.
Your car is going to be great.
Assuming you are looking at ST1 in NASA?
Anyone with any information on advanced aero for these cars please contact me. I am watching closely for any ideas.
Your car is going to be great.
Assuming you are looking at ST1 in NASA?
Anyone with any information on advanced aero for these cars please contact me. I am watching closely for any ideas.
09-14-2012, 11:21 AM
#96
Rennlist Junkie Forever
Thread Starter
First off the drive shaft angles are screwed up already on a lowered 951 so to correct that the trans should be raised.
Any axle problems I've had had zero to do with the angle of the shaft.
Secondly, aerodynamics and getting the total weight of the car lower to the ground should be a priority.
Lowering the trans will restrict how much you can lower the car in total. By raising the trans you can also make sure the exhaust does not protrude underneath the car. This means you can 1) lower the car more and get a greater mass further to the ground compared to a higher car with a lower trans.
2) Greatly increased effectivness of aerodynamics since you now can do a full flat floor very close to the ground.
3) You can also route the exhaust above the rear suspension with a raised trans
4) You can encapsulate the gearbox and do a flat flor and diffusor at the rear.
Lowering the trans will restrict how much you can lower the car in total. By raising the trans you can also make sure the exhaust does not protrude underneath the car. This means you can 1) lower the car more and get a greater mass further to the ground compared to a higher car with a lower trans.
2) Greatly increased effectivness of aerodynamics since you now can do a full flat floor very close to the ground.
3) You can also route the exhaust above the rear suspension with a raised trans
4) You can encapsulate the gearbox and do a flat flor and diffusor at the rear.
The car is going to be flat bottomed. And as you can see, the pan already has been done. We have a diffuser which is going to be integrated into the rear body work and run up to the pan. The front will be flat bottomed as well with the dual oil coolers being ducted out through the front brakes and the radiator ducted out through the hood louvers.
TonyG
09-14-2012, 11:33 AM
#97
Nordschleife Master
Sounds good. I just have a hard time seeing how you can lower the trans, fit a 3+" exhaust and still have a flat bottom without cutting the floor pan or make a side exhaust. But if you can do it that's great.
Not sure the engine, transaxle and transmission is the majority of the sprung weight though.
Not sure the engine, transaxle and transmission is the majority of the sprung weight though.
09-14-2012, 12:54 PM
#98
Rainman
Rennlist Member
Rennlist Member
Would there be any sense in chopping the roof off and replacing the whole thing with FG, relying on the cage for roll-protection? That's a fair bit of weight as high as it gets...
Btw, those rear wheel covers look pretty BA.
09-14-2012, 01:18 PM
#99
Rennlist Junkie Forever
Thread Starter
Motor (LS or 951) ~450lbs assembled, Trans ~140lbs, stock torque tube 60lbs...~650lbs in a car that weighs ~2100...
Would there be any sense in chopping the roof off and replacing the whole thing with FG, relying on the cage for roll-protection? That's a fair bit of weight as high as it gets...
Btw, those rear wheel covers look pretty BA.
Would there be any sense in chopping the roof off and replacing the whole thing with FG, relying on the cage for roll-protection? That's a fair bit of weight as high as it gets...
Btw, those rear wheel covers look pretty BA.
2100lbs total weight.
Wheels/suspension/brakes/1/2 of shocks/etc... = 450lbs approx.
.....
1650 total sprung weight
650lbs drive train
650/1650= 39.3%
The drive train = about 39% of the sprung weight.
So... I'm lowering 39% of the car's sprung weight by 1/2". That has a substantial affect on the car's center of gravity.
As far as roof goes.... There is no roof. It's just a skin that probably weights less than 5lbs.
TonyG
Last edited by TonyG; 09-14-2012 at 01:43 PM.
09-14-2012, 11:01 PM
#102
Rennlist Junkie Forever
Thread Starter
More updates... for today
The wheel tubs are done.
The fuel cell fire wall is done.
The new door fastener/clip is done.
Monday:
Finish the dual Fluidyne oil cooler mounting/ducting
TonyG
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.
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The wheel tubs are done.
The fuel cell fire wall is done.
The new door fastener/clip is done.
Monday:
Finish the dual Fluidyne oil cooler mounting/ducting
TonyG
.
.
.
09-15-2012, 12:04 AM
#104
Rennlist Member
Are you going to mount them either side at the front of the Orca-like bumper panel? Nice work on the wheel tubbing.
09-15-2012, 12:39 AM
#105
Rennlist Junkie Forever
Thread Starter