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: 4,213 New York
polyspheric
master
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master
Joined: Oct 2007
Posts: 4,213
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: 43,315 Bend,OR USA
Cab_Burge
I Win
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I Win
Joined: Aug 2003
Posts: 43,315
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 ![up up](/ubbthreads/images/graemlins/custom/thumbs_up.gif)
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: 43,315 Bend,OR USA
Cab_Burge
I Win
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I Win
Joined: Aug 2003
Posts: 43,315
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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