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 12Likes
07-30-2012, 09:06 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
Richard
BTW.....these are GT-2 cars running in GT-1 Class......age and technology.
__________________
Morris
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08-07-2012, 02:48 PM
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CC Member
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Join Date: Jan 2011
Location: bishops stortford,
NA
Cobra Make, Engine: Chevy LS3 supercharged
Posts: 86
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Not Ranked
Quote:
Originally Posted by Jac Mac
If you could mount the rack in the position indicated by the 'yellow' rack outline with the tie rod ends above the steering arms you would get the necessary ackerman effect plus gain a bit of clearance from brake rotors to tie rod ends.
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with camber compensaition the rack has to stay in line with the bottom ball joint and and a arm iner bushes this way there is zero bump steer if you move it up you get problems as the top a arms move in and out on the rocker to adjust camber you will get bump steer |
08-07-2012, 03:08 PM
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CC Member
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Join Date: Jan 2011
Location: bishops stortford,
NA
Cobra Make, Engine: Chevy LS3 supercharged
Posts: 86
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Not Ranked
Quote:
Originally Posted by Richard Hudgins
Morris,
Gary..... Nice looking piece you have designed there. I will be interested to see how you like it when you start testing.
Beautiful sheet metal work as well. Congrats...
Interesting brake calipers. I guess one can never have enough pistons but I do wonder the reason for 5? Are they trying for high beam stiffness or are the pistons of various sizes to give even pad clamping? |
Hi Richard we hav been building cars with this sytem for ten years now and have it well sorted now hears some pics of a lotus 7 replica we have built a few hundred of them,
the pistons in the calipers are various sizes and thers ten in the fronts,
thanks Gary |
08-07-2012, 03:21 PM
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CC Member
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Join Date: Jan 2011
Location: bishops stortford,
NA
Cobra Make, Engine: Chevy LS3 supercharged
Posts: 86
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Not Ranked
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08-07-2012, 04:25 PM
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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
Gary
Your comment on the rack having to be in line with the lower control arm to have zero bump steer is not correct......
There's a line between the inner upper pivot (upper control arm) and lower pivot (or lower control arm) that you can have the end of the steering rack mounted on....
And as you guy's get up into larger GT-1 type of cars....you will start to under stand how we have been able to get larger cars to handle on race tracks....and the lower control arms are mounted under the chassis so low that you can't get a steering rack down to that level.
Ackerman works better on Sedan type of cars then on formula cars....
Just trying to give you some of the experience that took us many years to acquire.
Morris
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Morris
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08-07-2012, 09:27 PM
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Senior Club Cobra Member
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Join Date: Jun 1999
Location: Fallbrook, CA USA,
CA
Cobra Make, Engine: Porsche 928 S4
Posts: 739
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Not Ranked
Quote:
Originally Posted by garyjettrike
hears a bit of film of one of our cars at bedford autodrome
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Sweet....................!!!!!!
I think I would enjoy one of those.......  |
08-08-2012, 03:58 AM
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CC Member
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Join Date: Jan 2011
Location: bishops stortford,
NA
Cobra Make, Engine: Chevy LS3 supercharged
Posts: 86
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Not Ranked
Quote:
Originally Posted by Morris
Gary
Your comment on the rack having to be in line with the lower control arm to have zero bump steer is not correct......
There's a line between the inner upper pivot (upper control arm) and lower pivot (or lower control arm) that you can have the end of the steering rack mounted on....
And as you guy's get up into larger GT-1 type of cars....you will start to under stand how we have been able to get larger cars to handle on race tracks....and the lower control arms are mounted under the chassis so low that you can't get a steering rack down to that level.
Ackerman works better on Sedan type of cars then on formula cars....
Just trying to give you some of the experience that took us many years to acquire.
Morris
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Morris, I agree with everything you are saying as long as you are talking about a conventional double A arm system. With the camber compensation system the top A arms are constantly moving in and out to adjust camber and the nearer you are to the top arm the more steering deflection you will get as the arms move.
This web sit explains how camber compensation works.
The Camber Compensation & Anti-Roll (CC&AR) Suspension System
Regards Gary
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08-08-2012, 08:16 AM
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CC Member
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Join Date: Dec 2004
Location: Kansas City,
KS
Cobra Make, Engine: jbl
Posts: 2,291
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Not Ranked
Quote:
Originally Posted by Richard Hudgins
Sweet....................!!!!!!
I think I would enjoy one of those.......
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Richard would drive anything that sounds like a f1 car  |
08-09-2012, 08:24 AM
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CC Member
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Join Date: Jan 2011
Location: bishops stortford,
NA
Cobra Make, Engine: Chevy LS3 supercharged
Posts: 86
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Not Ranked
hears some pics of anotherone of our camber compensaition cars that has been racing for a few years it wins regularly even though the othe cars in its class are lighter and run down force ,
it runs a LS3 580 HP and has no truble geting the power down thanks to the camber compensaition,
the other car is my bell jetranger turbine powerd car with the same chassis
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09-02-2012, 09:58 AM
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CC Member
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Join Date: Jan 2011
Location: bishops stortford,
NA
Cobra Make, Engine: Chevy LS3 supercharged
Posts: 86
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Not Ranked
our man Duncan Cowper takes another 2 seconds off the lap record at bedford in one of our camber compensaition cars beating the Graham Hathaway Juno
http://www.youtube.com/watch?v=eJxAo...Uy-w_Oapsbpe6Q
Last edited by garyjettrike; 09-02-2012 at 10:10 AM..
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09-08-2012, 06:27 PM
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CC Member
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Join Date: Jan 2011
Location: bishops stortford,
NA
Cobra Make, Engine: Chevy LS3 supercharged
Posts: 86
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Not Ranked
been busy in the workshop body hood and doors fitted and in the engine bay we done air the filter and header tanks for engine and intercooler, the air fillter will suck cool air from the side of the radiator.
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09-10-2012, 12:54 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
thats gonna be a BEAST! Cant wait to see some video of it running.
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Mark
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10-09-2012, 06:54 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
any updates?
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Mark
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10-13-2012, 07:33 AM
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CC Member
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Join Date: Jan 2011
Location: bishops stortford,
NA
Cobra Make, Engine: Chevy LS3 supercharged
Posts: 86
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Not Ranked
Quote:
Originally Posted by xlr8tr
any updates?
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Hi Mark plumbing in the engine was a biger job than i expected another header tank for the inter cooler and ducting in the air filter to pull cold air from the side of the radiator,
we have also made some new side mirror mounts and side vents, its getting there now.
Gary. |
10-13-2012, 08:06 AM
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CC Member
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Join Date: Dec 2004
Location: Kansas City,
KS
Cobra Make, Engine: jbl
Posts: 2,291
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Not Ranked
very nice work. i find the side mirrors useless with all the vibration and limited view going down the road unless a convex mirror is used, looks real nice though. same with the rear view, i switched to a boat mirror from cabelas and makes a world of difference. for the side you can get the round stick-on if you decide to try it.
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10-18-2012, 06:19 PM
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CC Member
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Join Date: Jan 2011
Location: bishops stortford,
NA
Cobra Make, Engine: Chevy LS3 supercharged
Posts: 86
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Not Ranked
just found a bit of film on utube of me scaring the crap out of a tv presenter from Stripper cars for cash, go strait to 34.50
strippers cars for cash - YouTube |
10-30-2012, 03:05 PM
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CC Member
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Join Date: Jan 2011
Location: bishops stortford,
NA
Cobra Make, Engine: Chevy LS3 supercharged
Posts: 86
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Not Ranked
Moor progress, we went for a different shape bonet scoop just to make the car recognisable as the XCS Cobra,
finished the fuel tank and boot area and sunken twin filler caps,but now we want to re make the roll over bars in bigger dia tube
done all the engine plumbing fuel water and intercooler in front of the radiator and doing the wireing now there is loads of it
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10-30-2012, 11:05 PM
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CC Member
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Join Date: Apr 2004
Location: Scotts Valley,
CA
Cobra Make, Engine: ERA 289 FIA #2108
Posts: 1,882
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Not Ranked
Quote:
Originally Posted by garyjettrike
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Great video. He's right, you know: That thing is a monster!
DD
__________________
Dangerous Doug
"You're kidding, right?"
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11-12-2012, 01:46 PM
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CC Member
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Join Date: Jan 2011
Location: bishops stortford,
NA
Cobra Make, Engine: Chevy LS3 supercharged
Posts: 86
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Not Ranked
just tacked the new 2"dia roll bars together and the large filler caps have arrived
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11-13-2012, 04:55 AM
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CC Member
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Join Date: Mar 2006
Cobra Make, Engine:
Posts: 231
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Not Ranked
Great job,
but outside hinges for the boot lid??
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