Need some help with the Bonneville Daytona
#2778773
05/27/20 03:43 PM
05/27/20 03:43 PM
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Joined: Oct 2009
Posts: 248 near St Petersburg, FL
Lifsgrt
OP
enthusiast
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OP
enthusiast
Joined: Oct 2009
Posts: 248
near St Petersburg, FL
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Hey, looking for a numerically lower than 2.76 8 3/4 gearset. I was told MOPAR made something in the 2.40 range at some point. Anybody have a line on a set? I have a 9" with 2.47s, but would sure like to keep it MOPAR. I'm planning to be at Speed Week in August to break the Classic Production A engine Record. Thanks
B3 1969 Charger R/T SE, 440/727 with 3:91s running 11.07@120
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Re: Need some help with the Bonneville Daytona
[Re: MR_P_BODY]
#2778866
05/27/20 07:43 PM
05/27/20 07:43 PM
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Joined: Oct 2009
Posts: 248 near St Petersburg, FL
Lifsgrt
OP
enthusiast
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OP
enthusiast
Joined: Oct 2009
Posts: 248
near St Petersburg, FL
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$2800...I'm running out of $1000 bills for this project!
B3 1969 Charger R/T SE, 440/727 with 3:91s running 11.07@120
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Re: Need some help with the Bonneville Daytona
[Re: Lifsgrt]
#2778867
05/27/20 07:44 PM
05/27/20 07:44 PM
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Joined: Oct 2009
Posts: 248 near St Petersburg, FL
Lifsgrt
OP
enthusiast
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OP
enthusiast
Joined: Oct 2009
Posts: 248
near St Petersburg, FL
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Dr Diff (Cass) says there were some in the 2.40 range way back.
B3 1969 Charger R/T SE, 440/727 with 3:91s running 11.07@120
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Re: Need some help with the Bonneville Daytona
[Re: Lifsgrt]
#2778998
05/28/20 09:07 AM
05/28/20 09:07 AM
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Joined: Oct 2007
Posts: 4,206 New York
polyspheric
master
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master
Joined: Oct 2007
Posts: 4,206
New York
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... and shorten the driveshaft
Boffin Emeritus
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Re: Need some help with the Bonneville Daytona
[Re: polyspheric]
#2779034
05/28/20 11:43 AM
05/28/20 11:43 AM
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Joined: Oct 2009
Posts: 248 near St Petersburg, FL
Lifsgrt
OP
enthusiast
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OP
enthusiast
Joined: Oct 2009
Posts: 248
near St Petersburg, FL
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Thanks guys. If it wasn't at least a solid 8 3/4 I wouldn't risk it at 950hp. Probably have to roll with the 9".
B3 1969 Charger R/T SE, 440/727 with 3:91s running 11.07@120
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Re: Need some help with the Bonneville Daytona
[Re: Lifsgrt]
#2779325
05/29/20 02:12 AM
05/29/20 02:12 AM
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Joined: Aug 2003
Posts: 43,163 Bend,OR USA
Cab_Burge
I Win
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I Win
Joined: Aug 2003
Posts: 43,163
Bend,OR USA
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I have a 1940 Ford Tudor street rod I'm swapping the 8 inch Ford rear end out and putting in a 9 inch rear end out of a 1976/1979 Lincoln Versiale (SP)) that has 2.46 ratio maybe (by checking the ratio turning the pinion shaft until the ring gear makes one full revolution), I haven't taken them apart and counted the ring and pinion gear teeth to get the exact final ratio yet. I ended up with two third members that have the same ratio, one is a posi, and I don't think I want to use either one. I'm thinking a 3.4? something ratio with 28 inch tall tires with a AOD tranny. Both center sections have 28 spline axles If you decided to do the Ford thing your welcome to the non posi third member for the shipping costs
Last edited by Cab_Burge; 05/29/20 02:14 AM.
Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
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Re: Need some help with the Bonneville Daytona
[Re: Pacnorthcuda]
#2779899
05/30/20 10:43 PM
05/30/20 10:43 PM
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Joined: Oct 2009
Posts: 248 near St Petersburg, FL
Lifsgrt
OP
enthusiast
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OP
enthusiast
Joined: Oct 2009
Posts: 248
near St Petersburg, FL
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Current record for Classic Production A-engine class (440-500"ish) is 237.7mph, so not to be greedy, I'll settle for 238mph. My 9" with 2.47 gears should put me there at 7200rpm with 28" tires, assuming minimal tire slippage. Faster is better, bur a two pass average on two consecutive days in the same mile of 237.8mph will do it.
B3 1969 Charger R/T SE, 440/727 with 3:91s running 11.07@120
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Re: Need some help with the Bonneville Daytona
[Re: Cab_Burge]
#2779901
05/30/20 10:46 PM
05/30/20 10:46 PM
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Joined: Oct 2009
Posts: 248 near St Petersburg, FL
Lifsgrt
OP
enthusiast
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OP
enthusiast
Joined: Oct 2009
Posts: 248
near St Petersburg, FL
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Thanks Cab, you'll need to come down if I can make it to Speed Week!
B3 1969 Charger R/T SE, 440/727 with 3:91s running 11.07@120
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Re: Need some help with the Bonneville Daytona
[Re: Lifsgrt]
#2780048
05/31/20 12:32 PM
05/31/20 12:32 PM
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Joined: Aug 2003
Posts: 43,163 Bend,OR USA
Cab_Burge
I Win
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I Win
Joined: Aug 2003
Posts: 43,163
Bend,OR USA
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Last edited by Cab_Burge; 05/31/20 12:33 PM.
Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
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