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Re: 904 low gear set et pick up
[Re: roadrunnerreds]
#471508
09/19/09 11:50 AM
09/19/09 11:50 AM
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Joined: Jan 2003
Posts: 8,021
Tulsa OK
Bad340fish
master
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master
Joined: Jan 2003
Posts: 8,021
Tulsa OK
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I kind of have an answer for you. I went from a low geared 904 to a 727 and it lost a tenth in the 60 and two or three in the 1/4. This was with the same converter as I just had it switched to a 727 setup. It lost that much ET on the motor and on the nitrous. Bigger nitrous pills got the ET back but the 60 never came back.
68 Barracuda Formula S 340
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Re: 904 low gear set et pick up
[Re: roadrunnerreds]
#471509
09/19/09 12:25 PM
09/19/09 12:25 PM
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Joined: Jan 2003
Posts: 5,894
Florida
Locomotion
master
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master
Joined: Jan 2003
Posts: 5,894
Florida
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The more torque and the less weight your car has, the less a low gear set will help. There are too many variables to give an accurate answer.
Last edited by Locomotion; 09/19/09 12:29 PM.
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Re: 904 low gear set et pick up
[Re: Locomotion]
#471510
09/19/09 12:42 PM
09/19/09 12:42 PM
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Joined: Mar 2003
Posts: 2,497
PA
moparacer
top fuel
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top fuel
Joined: Mar 2003
Posts: 2,497
PA
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What rear gear do you have in it Brad?
I tried a low set in my Dakota and the Duster and it was a waste of time. Switched them both back the very next week.
Your situation might be different though if your not running alot of gear and street driving it some.
67 Barracuda street/bracket car 11.27-119
68 Dart 502 BB 8.70s-152
414 cid SB Dragster 7.65-174
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Re: 904 low gear set et pick up
[Re: Bad340fish]
#471513
09/19/09 10:51 PM
09/19/09 10:51 PM
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Joined: Jun 2009
Posts: 877
ky
68roadrunner
super stock
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super stock
Joined: Jun 2009
Posts: 877
ky
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Quote:
I kind of have an answer for you. I went from a low geared 904 to a 727 and it lost a tenth in the 60 and two or three in the 1/4. This was with the same converter as I just had it switched to a 727 setup. It lost that much ET on the motor and on the nitrous. Bigger nitrous pills got the ET back but the 60 never came back.
part of it is all that extra weight slinging around in there on the 727
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Re: 904 low gear set et pick up
[Re: Dodgem]
#471516
09/20/09 06:07 PM
09/20/09 06:07 PM
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Joined: Apr 2007
Posts: 2,327
Glendale, AZ
69L78Nova
Banned. Forever.
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Banned. Forever.
Joined: Apr 2007
Posts: 2,327
Glendale, AZ
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What year did Ma make the change in the 904s? Wasnt it around 82-83?
1969 Nova
454/M21/3.31
Mild mid-11 second weekend cruiser
1994 F150 XLT Super Cab 2WD
5.0/4R70W/3.55
(Daily driver)
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Re: 904 low gear set et pick up
[Re: bill_greenwood]
#471519
09/21/09 07:52 PM
09/21/09 07:52 PM
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Joined: Jun 2008
Posts: 56
SWEET HOME ALABAMA
ITSDUSTA416
member
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member
Joined: Jun 2008
Posts: 56
SWEET HOME ALABAMA
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The low gear set changes 1st and 2nd gear ratios. stock: 2.45/1.45 low gear planetary: 2.74/1.54 It just changes 1st gear alot more. 
71 DUSTER 416 ET 6.33 @ 107 1.33 60FT
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Re: 904 low gear set et pick up
[Re: 73swinger]
#471520
09/21/09 08:59 PM
09/21/09 08:59 PM
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Joined: Mar 2008
Posts: 5,746
Ontario, Canada
Dodgem
master
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master
Joined: Mar 2008
Posts: 5,746
Ontario, Canada
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I bought mine years ago the lower first and second is noticable. first time I installed it made a bunch of other changes. Drove it street strip for yearsI ended up braking the welds on it when the rear brakes locked on. anyway had it welded and was running 3600 lb gtx 440 11.5 to 1 indy SR heads home ported ultra dyne 263/271 @ .050 with .597/.620 lift 4000 stall would run 11.0's to 10.7's one year i had trans out for freshen I put the gear set back in no other changes as only the tranny came out. then it would run 10.9's to 10.6's.
pretty much always a tenth faster than the year before of what I had come to expect and of course PB was .1 faster
I now have 4.56 gears so first is like going to 5.10 second like 4.88 and drive course is the same 4.56. you are not in second longer as it is lower geared too. fair drop into third though.
Last edited by Dodgem; 09/21/09 09:02 PM.
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Re: 904 low gear set et pick up
[Re: roadrunnerreds]
#471522
09/25/09 07:08 AM
09/25/09 07:08 AM
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Joined: Dec 2004
Posts: 1,489
St. Louis Mo.
10 o to go
"Happy Don"
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"Happy Don"
Joined: Dec 2004
Posts: 1,489
St. Louis Mo.
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This was my post on low gear
Well I got the magic slips tonite .
32 years and a new milestone
started out air wasn't that good head wind .
If you saw my past post from saturday I added low gear I picked up 60 ft 1.39 to 1.33 and best 8th mile et from 6.39 to 6.27 Benton.
GIR best 1.39 10.12 130.
GIR tonite
1.38 8.35 106.74 10.06 130.91
1.35 6.26 107.60 9.96 131.82
1.38 6.29 107.53 9.98 131.43
weather will be a factor on liscense runs now
think their will be some jet changing and timing.
new slicks will be on friday.
THANKS to Dan Smith (qwkmopardan),Gary Heilman,Mark Mareschal,Rick Woosley,Terry Lacy,
And Cheryl my wife
Looks like MMW will be a fun time.
DON
--------------------
update 2009 418" build dan smith built
8in 727 430 dana 2860 lb 3040 lb w driver
best to date9/15/09
1.33 60ft
10.12 130.new 9.96 131.82
6.26 111.
Edited by 10 o to go (Thu Sep 17 2009 07:09 AM)
Post Extras:
Last edited by 10 o to go; 09/25/09 07:10 AM.
2009 418" build dan smith built
new 9.96 131.82
6.23 108
1.30 60 foot
best to date 9/15/09
8in 727 430 dana 2860 lb 3040 lb w driver
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If your not spinning the tires now and it stays hook up with the additional starting line gear ratio it may pick up as little as .04 and as much as .18 
BTW, every car that I have ran them in 727s went faster 
. I think the .1 in the 60 was all gear ratio IMO.
.
