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Re: Gear Ratios for 1/4 mile small blocks
[Re: hemiparts]
#1020193
06/25/11 04:44 PM
06/25/11 04:44 PM
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Joined: Feb 2009
Posts: 1,532
off the grid
340B5
pro stock
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pro stock
Joined: Feb 2009
Posts: 1,532
off the grid
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I went from 4.56 to 4.88 in my Duster and there wasn't a whole lot of difference except 60' got a little more consistant, and it was easier to miss the 1-2 shift  . This is w/2.74 low(904) Of course the whole combo has to be considered. Mine was 254@.050 ported j's , strip dominator intake.
Yeah, it's got a smallblock.
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Re: Gear Ratios for 1/4 mile small blocks
[Re: stevet340]
#1020197
06/25/11 10:48 PM
06/25/11 10:48 PM
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Joined: Jan 2007
Posts: 437
south central pa
bdaz smblk
mopar
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mopar
Joined: Jan 2007
Posts: 437
south central pa
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Maybe I should rev my car harder looking at what gears u guy's run.I have a 440 cube with 7,500 conv and 4.86 gear with a 29.5x10.5 tire.
3120lb, small block, 10.5" tire, NA, through exhaust, full int, WITH 83/4 REAR, 9.0 at 150mph
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Re: Gear Ratios for 1/4 mile small blocks
[Re: bdaz smblk]
#1020198
06/25/11 10:53 PM
06/25/11 10:53 PM
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Joined: Nov 2009
Posts: 2,177
ill
dennismopar73
top fuel
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top fuel
Joined: Nov 2009
Posts: 2,177
ill
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Quote:
Maybe I should rev my car harder looking at what gears u guy's run.I have a 440 cube with 7,500 conv and 4.86 gear with a 29.5x10.5 tire.
 
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Re: Gear Ratios for 1/4 mile small blocks
[Re: Leon441]
#1020201
06/26/11 08:27 AM
06/26/11 08:27 AM
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Joined: Dec 2009
Posts: 20,640
in a cattle trailer down by th...
Guitar Jones
Paddle faster! I hear banjo music!
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Paddle faster! I hear banjo music!
Joined: Dec 2009
Posts: 20,640
in a cattle trailer down by th...
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I run a 4.86 with a 32" tall tire, shift at 7200 go through the lights about the same. When I had the 340 I used 5.13's with a 29.5 tire, shifted at 8000, whent through the lights about 8000, but I had W5's and a bigger cam.
"Follow me the wise man said, but he walked behind"
'92 D250 Club Cab CTD, 47RH conversion, pump tweaks, injectors, rear disc and hydroboost conversion.
'74 W200 Crew Cab 360, NV4500, D44, D60 and NP205 divorced transfer case. Rear disc and hydroboost conversion.
2019 1500 Long Horn Crew Cab 4WD, 5.7 Hemi.
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Re: Gear Ratios for 1/4 mile small blocks
[Re: hemiparts]
#1020203
06/26/11 11:42 AM
06/26/11 11:42 AM
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Joined: Jun 2003
Posts: 52,972
Romeo MI
MR_P_BODY
Master
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Master
Joined: Jun 2003
Posts: 52,972
Romeo MI
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Quote:
We are getting the Duster motor back together and ready for the Div2 race in August, what gear ratio are ya'll running in a small block with a 29.5 in tall tire. We have been running a 4.88, but have given some thought to backing it down some to lower the trap rpm. We are using a 5500 stall converter with a stock gear 727 and a .590 lift 312/312 duration cam in a stock stroke 343 cid engine. We apperciate all ya'lls help as always 
Chris
Is that a roller cam and whats the total weight
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Re: Gear Ratios for 1/4 mile small blocks
[Re: hemiparts]
#1020204
06/26/11 12:15 PM
06/26/11 12:15 PM
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Joined: Oct 2003
Posts: 7,506
Az
Crizila
master
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master
Joined: Oct 2003
Posts: 7,506
Az
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IMO 4.56 with that tire diameter would be ideal.
Fastest 300
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Re: Gear Ratios for 1/4 mile small blocks
[Re: MR_P_BODY]
#1020205
06/26/11 07:09 PM
06/26/11 07:09 PM
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Joined: Oct 2007
Posts: 1,031
Raleigh N.C
hemiparts
OP
"Missile Pilot"
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OP
"Missile Pilot"
Joined: Oct 2007
Posts: 1,031
Raleigh N.C
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Quote:
Quote:
We are getting the Duster motor back together and ready for the Div2 race in August, what gear ratio are ya'll running in a small block with a 29.5 in tall tire. We have been running a 4.88, but have given some thought to backing it down some to lower the trap rpm. We are using a 5500 stall converter with a stock gear 727 and a .590 lift 312/312 duration cam in a stock stroke 343 cid engine. We apperciate all ya'lls help as always
Chris
Is that a roller cam and whats the total weight
solid lift cam 3210 lbs total including driver.
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I run 5.86 gears in my 340, spin it up... 
