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4:56 gears |
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Mytcar34 
AMC Apprentice 
Joined: Jul/02/2012 Location: Texas Status: Offline Points: 233 |
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 Posted: Jun/29/2014 at 12:53pm |
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sounds like you have a rear ratio around 3.90 to 4.10 but I could be wrong.
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Mytcar
68 AMX 34 Ford 2004 Mustang Funny Car |
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matty 401
AMC Addicted 
Joined: Jul/06/2007 Location: Iowa Status: Offline Points: 1727 |
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Posted: Jun/29/2014 at 10:48pm |
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if you are talking about me nope 4.56 could be off a little on the speedo part
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72 matador 401 the beast
79 concord 2 door 72 matador 304 grasshopper 68 Rogue 406 93 Cherokee 4.0 5 speed |
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WesternRed
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Joined: Aug/03/2010 Location: Australia Status: Offline Points: 5796 |
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Posted: Jun/30/2014 at 7:03am |
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The 29" tyres would be helping to make the 4.56 gears a bit more streetable.
I have 4.44 gears in one of my cars and with a 25" tyre I'm flat out, i.e. pushing 6000 RPM, at around 100 mph in top gear.
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Mytcar34
AMC Apprentice
Joined: Jul/02/2012 Location: Texas Status: Offline Points: 233 |
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Posted: Jul/01/2014 at 6:52pm |
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Matty 401 I ran the rpm calculator looks like you are dead on with the 4.56 gears.
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Mytcar
68 AMX 34 Ford 2004 Mustang Funny Car |
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amcglass
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Joined: Dec/11/2011 Location: NW Ohio Status: Offline Points: 2588 |
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Posted: Jul/01/2014 at 8:46pm |
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agree with MYTCAR looks correct
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Javmanpres
BBG Mark Donohue 401 74 Jav/AMX 71 Matador 2dr sedan delivery wagon 1902 Rambler Runabout 70 T/A Javelin |
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budryzer
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Joined: Mar/15/2012 Location: Toms River, NJ Status: Offline Points: 758 |
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Posted: Jul/02/2014 at 12:02pm |
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Sorry, I've been busy....
27" tires and 1/8 mile runs. |
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1968AMX Stroked 369
"UNCLE SAM" tribute 04 H2 04 BMW 325 A/W 95 Ultralight Hobbycopter 85 CR500 x 2 and 13 other open Class Bikes 77 Hercules Chinook Flt Lead Prev 1970AMX390/4spSonicw/mask&3Gremm's |
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AMX1972
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Joined: Oct/11/2008 Location: Massena Iowa Status: Offline Points: 161 |
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Posted: Aug/21/2014 at 10:55pm |
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I know I'm late with this, but I'd work on the trans a little bit. What are you running for an engine and what is your shift point? With 29.5" tires, I ran a 4.88 gear with a 5000 stall converter and it went a heck of a lot more than 20 mph before I needed to shift to 2nd gear. My shift point is at about 6800 though, I'm running a 727 with a JW transbrake valve body.
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1972 Javelin AMX T/A Red 360/4 speed
1968 AMX "The Pied Piper" "Cam Only" 390/727 1/8th mile bracket racer on E-85. 10.92@121.9 mph. |
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nitrousamcrambler
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Joined: Sep/28/2014 Location: South Chicago Status: Offline Points: 49 |
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Posted: Sep/28/2014 at 2:00pm |
agreed if possible trying to change gear ratio is trans will help out best, My combo is a 31.5 tall taller, with a 5500 coverter and 5.14 ring gear, and i leave hard, My gear is a 2.48 first gear, trans th400 with trans break, |
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flboatman1
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Joined: Apr/01/2014 Location: SPRING HILL FL. Status: Offline Points: 52 |
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Posted: Oct/14/2014 at 12:09am |
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what are you trying to improve on et. mph, both or what. the 456 gear should be good. are running on gas or alc,
Edited by flboatman1 - Oct/24/2014 at 3:14pm |
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AMX1972 wrote: