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Stuff I am working on

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  #31  
Old 01-06-2017, 06:57 PM
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Originally Posted by era2076 View Post
Thanks Kanga -

We were headed for the machinist handbook.

chr
This should help..
 
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  #32  
Old 01-07-2017, 11:53 AM
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Originally Posted by DonL View Post
This should help..
awesome - thank you

chr
 
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Old 01-08-2017, 02:18 AM
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Originally Posted by Kanga View Post
Yes they are magnesium. ............
.
I am surprised as both seem heavy considering magnesium, but the diameters, widths, and offsets are larger than I am used to. Our 17x9 Enkei RPF1 weigh 16 lb

Some interesting stuff here

http://www.m3post.com/forums/showthread.php?t=265756
 

Last edited by GT3 Chuck; 05-08-2017 at 09:50 PM.
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Old 01-08-2017, 02:20 AM
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Kanga -

The comp cars used staggered wheel diameters front to rear? I noticed the different wheels, but did not realize they were of different diameter.

Do you have knowledge as to why this was done?
Do you know the aspect ratios used for the tires?
Were the cars lowered?
If so, by lowered spring perch, raised chassis pivots, or modified uprights?

I am trying to gain insight into the suspension geometry with respect to handling at the limit? My only experience is with a MacPherson SN95 Mustang and 1/2" is all you get without worsening or $$ to correct it.

I'd like to drop mine, but not at the expense of handling at the limit.

x-chr

 

Last edited by era2076; 01-08-2017 at 02:24 AM. Reason: split for clarity of topic
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Old 01-08-2017, 02:33 AM
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From your work under specification - duh

Wheels & Tyres
Speedline Corse 10" X 18" ET45mm cast magnesium front wheels 5 x 114.3 PCD
Speedline Corse 11" X 18" ET48mm cast magnesium rear wheels 5 x 114.3 PCD
Yokohama A048 tyres 250/650 18" front, 280/650 18" rear
So what is with the 19 rear?
 
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Old 01-08-2017, 08:39 AM
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Should be 18" rear as well, my fat fingers mistyped!

The cars were lowered, different spring lengths were used. Can give you spring rates if you need them. Currently finishing off adaptive suspension for my Vantage, all controlled by a phone app. Spring rates have been determined for the setup from testing at the Ring.
 
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Old 01-08-2017, 10:18 AM
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Originally Posted by Kanga View Post
Should be 18" rear as well, my fat fingers mistyped!

The cars were lowered, different spring lengths were used. Can give you spring rates if you need them. Currently finishing off adaptive suspension for my Vantage, all controlled by a phone app. Spring rates have been determined for the setup from testing at the Ring.
Yes Please! Would love to see the spring rates. Thanks Kanga!
 
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Old 01-08-2017, 10:50 AM
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This is what the N24/GT4 cars are FIA homologated with:

Springs (Koni & Bilstein 2 way adjustable dampers)
1. R9-ED-3218 300 N/mm 1713 lb/in
2. R9-ED-3217 260 N/mm 1485 lb/in
3. R9-ED-3216 220 N/mm 1256 lb/in
4. R9-ED-3215 180 N/mm 1028 lb/in
5. R9-ED-3214 150 N/mm 857 lb/in
6. R9-ED-3213 120 N/mm 685 lb/in
7. R9-ED-3212 90 N/mm 514 lb/in
Springs (Bilstein non-adjustable dampers)*
1. ADAC-5310-AA 254 N/mm 1450 lb/in
2. 0600-250-1100 193 N/mm 1100 lb/in
3. 0600-250-1000 175 N/mm 1000 lb/in
4. ADAC-5560-AA 131 N/mm 750 lb/in
* A 250lb/in tender spring is required for front and rear Bilstein dampers (ADAC-5588-AA).

The spec for the street/track adaptive system I will be running is:
F 75N/ R 90N


The standard road setup for V8/V12 Vantages is:
4.3l V8 F 36N / R 67N

4.3l V8 Prodrive F 60N / R 96N (adjustable dampers)

4.7l V8 F 40N / R 72N

4.7l V8 SportsPack F 72N / R 80N

6.0l V12 F 72N / R 80N
 
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  #39  
Old 01-08-2017, 11:37 AM
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Originally Posted by Kanga View Post
The cars were lowered, different spring lengths were used. ...........
This is very good news and of course I am quite interested in the spring rates. Between that and their weight I should have an idea what KW tried to do.

Do you know how much they were lowered?

Do you happen to know the motion ratios for the swing arms front and rear?

Do you happen to know the ride frequency of the comp cars and or the road cars ?

x-chr
 
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Old 01-08-2017, 11:59 AM
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Setup height was 80mm above flat plane. Drop me an email and I'll send through FIA Homologation docs. Has most of the specs. Motion ratios and ride frequencies are proprietary, would have to check with engineers before releasing them.
 
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Old 01-08-2017, 01:39 PM
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Originally Posted by Kanga View Post
Motion ratios and ride frequencies are proprietary, would have to check with engineers before releasing them.
The way of the universe -

email thru 6peed?

Very much appreciated

chr
 
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  #42  
Old 01-08-2017, 01:46 PM
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Kanga - PM Sent

x-chr
 
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  #43  
Old 01-08-2017, 06:36 PM
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THANKS Kanga! PM sent as well
 
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Old 01-18-2017, 04:56 PM
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We have been working on brake ducts. We looked at several solutions and are building around using the lower grill. The design for the rotor ducts comes from RoushGTR at corner-carvers. He posted this design years ago and I always wanted to try it. It seals the back of the rotor from the chaotic air inside the back of the wheel. This provides a clean air supply such that the cooling rate is even on both sides of the rotor.

We have some difficulties coming, but so far it seems promising. We are going to trying to use fixed tubing inside the liner that attaches to the chassis and screws to the liner with a flange. Flex tubing from the liner flange to the rotor duct.

This will allow us to change pads, fluid, add flex hose, and go to the track.

I sure hope it works















 
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Old 02-06-2017, 11:58 PM
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We are on our 2nd revision of the backing plate ducting. Our first version could not be finished. Some years ago I purchased a copy of "Prepare to Win". In it is a section on forming aluminum on a wooden buck. I brought this to Genes attention last week and when I went to see him this morning I was quite surprised and pleased. He modified the backing plate and fabricated a wooden buck for the inlet. It took him some hours with a saw and a sander. We plan to hammer two shapes around it and then weld the halves together, but it may end up taking several pieces. The grill end is not close to being correct, but that should be fairly easy to correct.









 
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