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 22Likes
03-09-2016, 12:00 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
CSX3170 at Scottsdale Goodguys
We took 3170 to Scottsdale for the first event of the year to see how my winter changes worked out. I changed the rear end ratio to a 4.27, redid the front caliper mounts to better fit my floating brake rotors, upped the rear spring rate to 750 lb/", rebuilt the power steering rack and slightly changed the alignment for the event. We are trying to get a handle on what the best set up is for the Shoot Out next November. The car worked perfectly even though it was on some very worn tires from last year that were so bad we finally had to replace them Saturday at noon. The car was turning 8200 at the finish line so gearing is perfect for the tight little Goodguys courses. I modified the throttle body by disconnecting the secondaries because it would blow the tires off as soon as they started to open. The car is much easier to drive now and actually faster on the tiny Goodguys course because Scott can precisely modulate the throttle.
We are trying to run the Goodguys event in Pleasanton on the 19th and 20th of March but I am having eye surgery on this Thursday so have to see how that works out. The car was in first place from the first run to the last and pretty much dominated the field so we are happy. I just got new Bridgestone RE71 R and Rival S tires so the car should be a second faster next time out. We are very happy with the handling now, both power down and turn in are excellent. We are going to try Bridgestone RE71-R 285x30x18's in April to see if we can get more front end grip and reduce our rake angle. I will post the video of a run or two as soon as it is up on YouTube.
[ame]https://m.youtube.com/watch?v=5_9FteQ3nuA&feature=youtu.be[/ame]
Last edited by Cobra #3170; 03-09-2016 at 12:11 PM..
Reason: Add Video
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03-09-2016, 12:31 PM
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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: 19,022
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Not Ranked
Sweet....  |
03-09-2016, 12:49 PM
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CC Member
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Join Date: Oct 2008
Location: Lions Bay,
BC
Cobra Make, Engine: CAN-AM cobra, 460 SVO
Posts: 326
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Not Ranked
christ, I dont think mine would even make some of those turns without using the parking brake!
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Mark
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03-09-2016, 02:00 PM
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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
On another thread on this forum, a guy was asking if two four barrel carbs were better than one. It appears that a two barrel carb is plenty under some circumstances. ... I really enjoyed watching the run.
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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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03-09-2016, 02:08 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: 5,590
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Not Ranked
I love seeing that car run!
Are all the Goodguys' courses identical layout?
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Cheers,
Tony
CSX4005LA
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03-09-2016, 03:29 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
Scottsdale
Quote:
Originally Posted by twobjshelbys
I love seeing that car run!
Are all the Goodguys' courses identical layout?
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Thanks Tony,
Each course is different but the ones in Scottsdale are very similar and that is the one that counts so we have set up the car around Scottsdale trying to finally win the big one. They have an insurance mandate to keep speeds down
so courses are slower than SCCA course's. Throttle body can flow about 825 cfm so we are probably about 700 - 750 crank HP. We are pulling 1.31 G cornering loads on last years tires so our set up this year is good. I should have an in car video in a day or so. I am really happy with the floating brake rotors we finally got rid of pad knockback. |
03-09-2016, 04:03 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: 5,590
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Not Ranked
When I lived in Colorado I always went to the Good Guys up in Loveland and they had their course set up. Since you seem to be going to a lot of these I wondered if they were uniform so that tuning for one would work for the others. Didn't you drop in on that one last year or the year before? It used to be in June but now Sept.
__________________
Cheers,
Tony
CSX4005LA
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03-09-2016, 05:53 PM
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CC Member
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Join Date: Nov 2015
Cobra Make, Engine:
Posts: 31
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Not Ranked
I got to talk to Scott about 3170 after a run and man, is he one enthusiastic driver! Thanks for taking time out of your busy race day to talk to a fan.
I took these during a morning practice session on Saturday, probably the run before the tires got replaced.
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03-09-2016, 06:38 PM
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Registered User
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Join Date: Nov 2015
Cobra Make, Engine:
Posts: 4
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Not Ranked
I watched you run on Saturday ... Awesome!
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03-09-2016, 06:52 PM
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CC Member
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Join Date: Aug 2013
Location: Haslet,
TX
Cobra Make, Engine: BDR #888, Keith Craft 408
Posts: 344
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Not Ranked
You guys sure kicked my butt.......
Again, I truly appreciate all the help you two send my way.....
Kevin.....
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03-09-2016, 06:59 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
Grey 65
Quote:
Originally Posted by Grey 65
You guys sure kicked my butt.......
Again, I truly appreciate all the help you two send my way.....
Kevin.....
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Cobra guys need to stick together there are a ton of chevys out to get us, glad
we could help make your car more driveable. |
03-09-2016, 07:21 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
Courses
Quote:
Originally Posted by twobjshelbys
When I lived in Colorado I always went to the Good Guys up in Loveland and they had their course set up. Since you seem to be going to a lot of these I wondered if they were uniform so that tuning for one would work for the others. Didn't you drop in on that one last year or the year before? It used to be in June but now Sept.
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Yes, we did stop in Colorado on the way home from the National championships in Nebraska last year. Scott had to be at work Monday so we made some runs and left Friday at noon. Scott's time from Friday was never beat but because we could not be there Sunday the award was given to another car that ran Sunday.
Surfaces vary and some courses are much faster but we are trying to optimize the car for Scottsdale so the springs, ride heights, shocks and bars are tuned around that venue. Our set up would allow a second gear start on a normal autox and still have 80+ mph capability so the rear gear change did not hurt us.
We never made one run last weekend without changing something on the set up to gather data for next time. We always tune the chassis for the conditions and have gained as much as 2 seconds doing that.
We were talking to Robby Unser Saturday and he said it was the most difficult driving he had done because you cannot make a mistake and win. |
03-09-2016, 09:01 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
Here is the in car video, sounds a little like a sprinter on dirt.
[ame]https://m.youtube.com/watch?v=tG7luvayPJs[/ame]
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03-10-2016, 04:35 AM
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CC Member
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Join Date: Nov 1999
Location: Brisbane, Australia,
Q
Cobra Make, Engine: Contemporary CCX3117 427FE
Posts: 4,381
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Not Ranked
Wow
Wow
Wow!
I could listen to the audio of that first video all day long. Great photos too, AZ.
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Craig
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11-20-2016, 11:51 AM
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CC Member
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Join Date: Jun 2000
Location: Cape Town, South Africa/Mainz, Germany,
Posts: 1,601
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Not Ranked
Awesome! Please post more.
Now I also understand your steering ratio and the need for power steering!
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If I don't respond anymore, that's because I can't log in
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11-20-2016, 09:51 PM
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CC Member
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Join Date: Oct 2006
Cobra Make, Engine: Former owner of Long Live the Bow tie Contemporary #102 427 Chevy .30 over Merlin heads 11to1, TBI injection
Posts: 749
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Not Ranked
Small and Tight course, you could probably go around it faster in a Go Kart with a 10 hp Honda engine.
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11-21-2016, 07:17 AM
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Stolen Avitar
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Join Date: Oct 2004
Location: Brunswick,
GA
Cobra Make, Engine: BDR 1311 428PI
Posts: 3,044
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Not Ranked
Beautiful sound and from that perspective also looks like it behaves extraordinarily well for a Cobra. Bravo!
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11-21-2016, 08:23 PM
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CC Member
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Join Date: Sep 2002
Location: Phoenix,
AZ
Cobra Make, Engine: FFR: 302 w/aluminum heads, Edlebrock injection. Street car trim, no scoop, side pipes or rollbar.
Posts: 1,869
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Not Ranked
I know the driver knows what he's doing but all those concrete barriers give me the willies!
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"Cobra-Cobra-bo-bobra, banana-fanna-fo-fobra, fe-fi-mo-mobra...Cobra!"
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11-22-2016, 10:14 AM
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CC Member
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Join Date: Oct 2016
Location: Pleasanton,
CA
Cobra Make, Engine: ERA 824 with 470 FE BBM street 427
Posts: 550
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Not Ranked
Old, but great, thread! Will come back to visit this when I have audio!
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11-22-2016, 08:50 PM
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CC Member
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Join Date: Oct 2016
Location: Pleasanton,
CA
Cobra Make, Engine: ERA 824 with 470 FE BBM street 427
Posts: 550
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Not Ranked
Ok, so I have audio. WOW! That looks like a blast!
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