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 5Likes
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2
Post By Cobra #3170
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3
Post By Cobra #3170
01-09-2016, 10:24 PM
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CC Member
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Join Date: Apr 2007
Cobra Make, Engine:
Posts: 1,009
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Not Ranked
Cobra Picture
My co-driver ( Scott Fraser) just sent me this photo of me driving my car at this years solo II National Championships. It is my all time favorite photo because it shows the car at maximum cornering load, note all green indicator lights are on,
1/2 throttle (4 of 8 lights) and brakes applied. The photo as posted is a little blurry but you can see the right hand wheels are almost in the air. This truly shows how hard this car can be pushed on street tires. Look closely at the left rear tire and you can see the distortion at the rim. I hope the picture shows larger than a thumbnail (I have never mastered the art of posting pictures)
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01-09-2016, 10:40 PM
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CC Member
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Join Date: Jan 2009
Location: Las Vegas,
NV
Cobra Make, Engine: Shelby CSX4005LA, Roush 427IR
Posts: 5,629
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Not Ranked
Amazing!
__________________
Cheers,
Tony
CSX4005LA
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01-09-2016, 11:03 PM
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CC Member
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Join Date: Aug 2013
Location: Chandler,
AZ
Cobra Make, Engine: FFR 289 FIA 347 Stroker
Posts: 444
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Not Ranked
That is a great photo, what tires are you running? Air pressure?
Thanks
__________________
Dave from Chandler.
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01-10-2016, 12:14 AM
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CC Member
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Join Date: Oct 2007
Location: Cape Town,
WC
Cobra Make, Engine: Shamrock
Posts: 428
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Not Ranked
Wow - thanks for posting it - gives us something to aspire to.
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01-10-2016, 03:08 AM
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Senior Club Cobra Member
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Join Date: Dec 2001
Location: Shasta Lake,
CA
Cobra Make, Engine:
Posts: 26,615
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Not Ranked
That is a great picture and really shows how well you have the car set up for that track. I will try to make it larger for you. Thanks for posting it.
Ron
Last edited by Ron61; 01-10-2016 at 07:15 AM..
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01-10-2016, 05:35 AM
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CC Member
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Join Date: Feb 2002
Location: Dadeville,
AL
Cobra Make, Engine: Sold my EM.
Posts: 2,459
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Not Ranked
Too cool. It reminds me of when I'd see fog coming from the wings of my jet telling me I was getting about all there was from it and the air.
__________________
Tommy
Cheetah tribute completed 2021 (TommysCars.Weebly.com)
Previously owned EM Cobra
"Never attribute to malice that which is adequately explained by stupidity." - Hanlon's Razor
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01-10-2016, 07:04 AM
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CC Member
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Join Date: Dec 2010
Location: Tempe,AZ-High Point,NC,
AZ
Cobra Make, Engine: Kirkham #684, 482FE, Mike Mccluskey build
Posts: 2,520
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Not Ranked
Try that with BFG radial T/A, lol, which most on here use... 
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PRIDEnJOY
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01-10-2016, 07:15 AM
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Senior Club Cobra Member
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Join Date: May 2001
Location: Florence,
AL
Cobra Make, Engine: RCR GT 40 & 1966 Fairlane 390 5 speed
Posts: 4,511
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Not Ranked
OK Tommy explain "my jet"
Dwight
__________________
''Life's tough.....it's even tougher if you're stupid.'' ~ John Wayne
"Happiness Is A Belt-Fed Weapon"
life's goal should be; "to be smarter than inanimate objects"
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01-10-2016, 09:45 AM
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CC Member
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Join Date: Feb 2002
Location: Dadeville,
AL
Cobra Make, Engine: Sold my EM.
Posts: 2,459
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Not Ranked
Dwight,
I sent you a PM.
__________________
Tommy
Cheetah tribute completed 2021 (TommysCars.Weebly.com)
Previously owned EM Cobra
"Never attribute to malice that which is adequately explained by stupidity." - Hanlon's Razor
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01-10-2016, 10:21 AM
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CC Member
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Join Date: Apr 2007
Cobra Make, Engine:
Posts: 1,009
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Not Ranked
Sizing Picture
Quote:
Originally Posted by Ron61
That is a great picture and really shows how well you have the car set up for that track. I will try to make it larger for you. Thanks for posting it.
Ron |
Thank You Ron!
Thanks to everybody for your compliments, tires are 335x30x18 Rival S rears at 22 psi and fronts are 275x35x18 Bridgestone RE71-R at 28 psi. I am putting extended nose's on the front shocks to increase droop be 1" so the front and rear contact will be closer to equal after seeing this picture.
Last edited by Cobra #3170; 01-10-2016 at 10:23 AM..
Reason: corrected tire size
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01-10-2016, 11:17 AM
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Senior Club Cobra Member
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Join Date: Mar 2005
Location: Manchester,
NH
Cobra Make, Engine: AK1085 (302 Street), HTM111 (427 Comp), CSX2375R (289 Comp) and COB5999 (427 S/C)
Posts: 19,111
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Not Ranked
Love action shots. Especially vintage cars taking it to newer cars.
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01-10-2016, 11:20 AM
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CC Member
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Join Date: Feb 2007
Location: Colorado Springs,
CO
Cobra Make, Engine: Backdraft, supercharged Coyote
Posts: 2,453
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Not Ranked
right side tires are off the ground, and are doing nothing except hanging there. Looks like you need more spring.
__________________
.boB "Iron Man"
NASA Rocky Mountain TTU #42
www.RacingtheExocet.com
BDR #1642 - Supercharged Coyote, 6 speed Auto
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01-10-2016, 11:22 AM
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CC Member
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Join Date: Dec 2003
Location: Gurnee,
IL
Cobra Make, Engine: Kirkham #259
Posts: 1,396
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Not Ranked
Bruce
Tires in the air have no traction........your tires appear to have good adhesion so getting them on the ground will mean faster times..... 
__________________
Morris
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01-10-2016, 11:52 AM
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CC Member
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Join Date: Apr 2007
Cobra Make, Engine:
Posts: 1,009
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Not Ranked
Weight Transfer
Quote:
Originally Posted by bobcowan
right side tires are off the ground, and are doing nothing except hanging there. Looks like you need more spring.
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Weight transfer is related to CG height and track width only more spring will not help other than to overload the outside tires contact patch a little sooner.
This is not only based on the physics of suspension dynamics but on trial and error too. Maximum cornering G's were achieved with these street tires at the current spring rates. I have spring sets from 300 lb/" to 1200 lb/" in 50 lb/" increments and in some cases 25 lb/" increments. Believe me, we have tested lots of combinations of sway bar and spring rates and found that the laws of physics have not been repealed. Some contact is better than no contact so increasing droop will help but reducing roll will not reduce weight transfer other than a very small amount related to cg height change. a 25 pound per inch front spring increase cost about .5 seconds during our last test. The Cobra is cursed with a short wheel base and narrow track width, neither are good for cornering stability. |
01-10-2016, 05:54 PM
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Senior Club Cobra Member
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Join Date: Sep 2000
Location: Holderness, NH, US of A,
NH
Cobra Make, Engine: CSX 4772 old iron FE
Posts: 5,499
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Not Ranked
Brilliant shot Bruce. Congrats on the results of your perseverance and dedication to the ultimate set up.
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01-11-2016, 07:29 AM
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CC Member
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Join Date: Feb 2000
Location: St. Lucia, West Indies,
WI
Cobra Make, Engine: Unique 427SC 383 stroker
Posts: 3,786
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Not Ranked
Absolutely incredible stuff, Bruce! Keep on pushing it and keep the pics and updates coming. Thanks for sharing.
__________________
Tropical Buzz
Grant me the serenity to accept the things I cannot change, the strength to change the things I can, and the wisdom to know the difference. -(wasn't me)
BEWARE OF THE DOGma!! Dogmatism bites...
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