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01-11-2019, 12:24 PM
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CC Member
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Join Date: Feb 2018
Location: Lodi,
CA
Cobra Make, Engine: 427 manowar forged crank roller rockers . BIG CAM.
Posts: 785
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Not Ranked
Backdraft tires
I was hoping to get some input on tires for my car for summer time use. I am currently running nittos nto5 on the car it has 335 on the back 17" rims . I still am a newbie butt I noticed the car wants to grab everything! BY this I mean you know how semi trucks leave low spots on asphalt my car wants to jump from side to side grabbing traction. Please share your thoughts on tires and sizes for front and rear. keep in mind however I want performance tires.
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01-11-2019, 09:09 PM
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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: 2,448
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Not Ranked
Tires are not the problem. First thing to check would be air pressure; 24-26psi would be a good starting point.
Also check your alignment specs, front and rear.
If those check out, start looking for something loose, or broken.
__________________
.boB "Iron Man"
NASA Rocky Mountain TTU #42
www.RacingtheExocet.com
BDR #1642 - Supercharged Coyote, 6 speed Auto
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01-11-2019, 11:11 PM
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CC Member
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Join Date: Feb 2018
Location: Lodi,
CA
Cobra Make, Engine: 427 manowar forged crank roller rockers . BIG CAM.
Posts: 785
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Not Ranked
tracks straight on smooth road could use higher quality shocks might that be the problem?
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01-12-2019, 03:54 AM
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Senior Club Cobra Member
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Join Date: May 2007
Location: Mesa,
AZ
Cobra Make, Engine: Contemporary Classic, 428 FE CCX 3069
Posts: 7,506
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Not Ranked
What rearend are you running? How is it set up?
__________________
Dan in Arizona
CCX3209
"It's a great car and I love it, but it doesn't do 'SLOW' very well."
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01-12-2019, 08:01 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: 2,448
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Not Ranked
Quote:
Originally Posted by hauss
tracks straight on smooth road could use higher quality shocks might that be the problem?
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Possibly. If they're blown out and leaking, replace them. Otherwise, look at the set up first.
__________________
.boB "Iron Man"
NASA Rocky Mountain TTU #42
www.RacingtheExocet.com
BDR #1642 - Supercharged Coyote, 6 speed Auto
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01-12-2019, 05:04 PM
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CC Member
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Join Date: Feb 2018
Location: Lodi,
CA
Cobra Make, Engine: 427 manowar forged crank roller rockers . BIG CAM.
Posts: 785
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Not Ranked
Quote:
Originally Posted by Danr55
What rearend are you running? How is it set up?
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It has the bmw e36 with 1/8 longer bolts locktighted to flange on dif side (No more backing out problems ). yes it is a lsd. Also I would love to hear about tire sizes and brands others are installing on their cars. |
01-12-2019, 05:21 PM
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CC Member
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Join Date: Feb 2018
Location: Lodi,
CA
Cobra Make, Engine: 427 manowar forged crank roller rockers . BIG CAM.
Posts: 785
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Not Ranked
Quote:
Originally Posted by bobcowan
Tires are not the problem. First thing to check would be air pressure; 24-26psi would be a good starting point.
Also check your alignment specs, front and rear.
If those check out, start looking for something loose, or broken.
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First I would like to say I took a look at your car and I love it! I talked to some vintage racers and they said their car act up at low speeds too, is this normal? with sticky tires ? also 335 35 17 on rear and 255 40 17 on front. everything is tight and in proper working order the only thing is it has not been in the alignment shop but at speed the problems go away other than a little steering wheel flutter in corners handles like a dream. |
01-12-2019, 05:33 PM
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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: 2,448
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Not Ranked
Thanx.  I'm still learning how to drive this beast. Very different than the previous car.
If it hasn't been to the alignment shop, do that. To get the most out of the engine, you have to spend some time tuning it. To get the most out of the chassis, you have to spend some time tuning that as well.
__________________
.boB "Iron Man"
NASA Rocky Mountain TTU #42
www.RacingtheExocet.com
BDR #1642 - Supercharged Coyote, 6 speed Auto
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01-13-2019, 08:51 PM
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CC Member
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Join Date: Feb 2018
Location: Lodi,
CA
Cobra Make, Engine: 427 manowar forged crank roller rockers . BIG CAM.
Posts: 785
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Not Ranked
will do thank you.I spent a little time jetting the quickfuel carb was way to rich cleaned up the bottom and mid but lost a little on top.spark plugs are now tan may fatten up just a tad on the mains and see what happens
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01-14-2019, 12:24 AM
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CC Member
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Join Date: May 2008
Location: Brisbane,
QLD
Cobra Make, Engine:
Posts: 2,797
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Not Ranked
Quote:
Originally Posted by hauss
will do thank you.I spent a little time jetting the quickfuel carb was way to rich cleaned up the bottom and mid but lost a little on top.spark plugs are now tan may fatten up just a tad on the mains and see what happens
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If you happy with the bottom and middle, increase the fueling under load with the PVCRs, but I would decrease the high speed air bleeds about .004 as a first step.
Gary |
01-14-2019, 05:21 PM
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CC Member
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Join Date: Feb 2018
Location: Lodi,
CA
Cobra Make, Engine: 427 manowar forged crank roller rockers . BIG CAM.
Posts: 785
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Not Ranked
Not sure what you mean wont that decrease the top end are you saying do this after I jet up the secondarys?
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01-14-2019, 05:25 PM
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CC Member
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Join Date: Feb 2018
Location: Lodi,
CA
Cobra Make, Engine: 427 manowar forged crank roller rockers . BIG CAM.
Posts: 785
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Not Ranked
one more thing I switch from a 6.0 to 4.5 I have 0 vaccum big cam at idle
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01-16-2019, 05:35 PM
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CC Member
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Join Date: May 2008
Location: Brisbane,
QLD
Cobra Make, Engine:
Posts: 2,797
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Decreasing the high speed air bleeds has the same effect as increasing the main jet size, but affects the top end more.
So if you happy with bottom end, play with the air bleed size for top end.
Decrease bleed size for less air, richer
Increase for more air, leaner.
Gary
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01-16-2019, 07:03 PM
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CC Member
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Join Date: Feb 2018
Location: Lodi,
CA
Cobra Make, Engine: 427 manowar forged crank roller rockers . BIG CAM.
Posts: 785
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Not Ranked
Quote:
Originally Posted by Gaz64
Decreasing the high speed air bleeds has the same effect as increasing the main jet size, but affects the top end more.
So if you happy with bottom end, play with the air bleed size for top end.
Decrease bleed size for less air, richer
Increase for more air, leaner.
Gary
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THANK YOU . I still am new to this so your info is very helpful .I will try your recommendations and let you know how well they worked. It is raining here so it may take a little while. |
01-21-2019, 12:04 PM
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CC Member
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Join Date: Feb 2018
Location: Lodi,
CA
Cobra Make, Engine: 427 manowar forged crank roller rockers . BIG CAM.
Posts: 785
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Not Ranked
Quote:
Originally Posted by Gaz64
Decreasing the high speed air bleeds has the same effect as increasing the main jet size, but affects the top end more.
So if you happy with bottom end, play with the air bleed size for top end.
Decrease bleed size for less air, richer
Increase for more air, leaner.
Gary
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Just wanted you to know I have been pm. ing you but dosent seem to be getting threw not sure why.Have lots of pics of carb for you will send with email if you would like pm me with email. Thanks again for all your help. |
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