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 5Likes
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3
Post By Chilibit
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1
Post By CompClassics
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1
Post By Sledge
09-23-2018, 03:39 PM
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CC Member
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Join Date: Apr 2011
Cobra Make, Engine: SPF-427R
Posts: 56
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Not Ranked
Avon CR6ZZ what tire pressures are you running
SPF with small block.
I was a little low on pressure and went up to 35psi all around and there was a significant increase in feel and turn. Wondering what is ideal.
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09-23-2018, 03:58 PM
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CC Member
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Join Date: Jun 2006
Cobra Make, Engine: Superformance, Roush 402R, Kentucky Cobra Club
Posts: 223
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Not Ranked
18-20 unless I am on the track. I ran 26 at VIR. My tire wear is perfect. 35 is off my chart.
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09-23-2018, 05:26 PM
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CC Member
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Join Date: Apr 2011
Cobra Make, Engine: SPF-427R
Posts: 56
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Not Ranked
I was at 22. This way it drives much better
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09-23-2018, 07:29 PM
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CC Member
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Join Date: Feb 2013
Location: Carlsbad,
Ca
Cobra Make, Engine: SAI FIA, 289HP (5-bolt), 48IDA Webers
Posts: 1,244
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Not Ranked
The reason it feels better is because it is easier for the tire to roll and turn, grip is compromised though.
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09-23-2018, 08:28 PM
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CC Member
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Join Date: Oct 1999
Location: Prosper,
TX
Cobra Make, Engine: CAV GT40 #169, Ford 408 Stroker & ZF Transaxle
Posts: 2,408
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Not Ranked
On my GT40 I run 26 in the front and 23 in the rear on my AVONs.
__________________
Gary
CAV GT40
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09-23-2018, 08:49 PM
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CC Member
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Join Date: Apr 2004
Location: Long Beach,
CA
Cobra Make, Engine: BDR #168 427W 66+K miles and counting
Posts: 338
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Not Ranked
For even tire wear on my BDR, I run 23 psi front, 16 psi rear. These numbers were obtained using an infrared temperature detector to obtain temp readings across the tread width, corrected for camber settings. As opposed to my usual method, which is pulling them directly outta my a$$.
__________________
Bill
"If your work speaks for itself, don't interrupt"
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09-24-2018, 05:18 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: 26,597
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Not Ranked
I run 28 to 30 on all wheels on my Coupe. With my tires 28 seems to be the best as I get no extra wear and the tires don't overheat.
Ron
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09-24-2018, 10:41 AM
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Full Blown Member
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Join Date: Sep 2008
Cobra Make, Engine: KMP 427 S/C, Twin Paxton 511 FE
Posts: 2,594
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Not Ranked
My wife and I took out the CSX for a drive yesterday (she was driving). I had just put 26F/25R in our Avons and she noticed the car was better planted in the switchbacks.
__________________
rodneym
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09-24-2018, 12:20 PM
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CC Member
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Join Date: Jan 2018
Location: Lafayette,
IN
Cobra Make, Engine: Looking to buy
Posts: 1,295
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Not Ranked
I have 24 in my Hoosier A7s. I have not tried them yet so will check back when I do.
__________________
 Cobra loving, autocrossing Grandpa Architect.
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09-28-2018, 07:59 AM
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CC Member
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Join Date: Apr 2011
Cobra Make, Engine: SPF-427R
Posts: 56
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Not Ranked
i'm going to go down to 28 and see how it feels. thanks for the input.
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09-28-2018, 07:13 PM
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Senior Club Cobra Member
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Join Date: Jul 1999
Location: SF Bay Area,
CA
Cobra Make, Engine: SPF #1019
Posts: 1,657
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Not Ranked
19 rear / 21 front.
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09-28-2018, 07:31 PM
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CC Member
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Join Date: Apr 2016
Location: Phoenix,
AZ
Cobra Make, Engine: Ex owner of a polished Kirkham 427 S/C. Now Cobra-less and driving a mid-engine German hot rod.
Posts: 828
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Not Ranked
24 psi front and rear. Had them at 32 psi once and it was way too firm. I have 245's on the front and 295's on the back and 22-24 seems about right with a good contact patch across the cross section
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09-29-2018, 01:08 PM
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CC Member
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Join Date: Aug 2008
Location: Tahoe/Truckee,
ca
Cobra Make, Engine: Ford Racing 363/8-stack injection, SPFR0012
Posts: 260
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Not Ranked
I'v been running 30F/28R, still have enough bit to brake an axle, when the car was delivered pressures were at 38F/38R, ride was junk. By the way still have 50% tread after 4k.
Mark.
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10-09-2018, 10:39 AM
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CC Member
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Join Date: Apr 2001
Location: West Suburbs,
IL
Cobra Make, Engine: Titanium SPF, 521 CID Gessford.
Posts: 338
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Not Ranked
Avon CR6ZZ's: Currently running 25 lbs. all around, but I ran 18-20 lbs. for the previous few years. I really can't tell the difference.
Treadwear seems great on these, even with a few track days.
__________________
Join the N.R.A. -- Homeland Security begins in YOUR home.
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10-11-2018, 07:10 PM
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CC Member
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Join Date: Jan 2018
Location: Lafayette,
IN
Cobra Make, Engine: Looking to buy
Posts: 1,295
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Not Ranked
Quote:
Originally Posted by t walgamuth
I have 24 in my Hoosier A7s. I have not tried them yet so will check back when I do.
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At the autocross last sunday I worked down to about 22 all around.
__________________
Cobra loving, autocrossing Grandpa Architect.
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10-16-2018, 06:21 AM
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CC Member
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Join Date: Feb 2016
Location: North of London,
UK
Cobra Make, Engine: AC Cars Limited, 302 EFI
Posts: 204
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Not Ranked
Quote:
Originally Posted by Ron61
I run 28 to 30 on all wheels on my Coupe. With my tires 28 seems to be the best as I get no extra wear and the tires don't overheat.
Ron
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Me too, but on a Mk IV. It's what the Autokraft Handbook recommends. |
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