Re: Giving up 60 foot..
[Re: Sammy]
#2808578
08/13/20 06:30 PM
08/13/20 06:30 PM
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Joined: Aug 2003
Posts: 4,677 On the parachute mount
n20mstr
master
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master
Joined: Aug 2003
Posts: 4,677
On the parachute mount
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Went from 4.56 gears to 4 10s and picked up .3 and 4mph. 60 foot feels weak now. Gear effects the converter . At both ends of the track . Is it a 2 speed or 3 speed 1/8 or 1/4 ? Do you have a data logger Usually the converter will be tighter at the stripe with more gear , BUT a lot effects this , weight , etc
....BAD A$$ STREET CAR.....
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Re: Giving up 60 foot..
[Re: Sammy]
#2808835
08/14/20 12:32 PM
08/14/20 12:32 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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Good combo to fool people with a top end charge with the 4.10's. Sounds like it may have spent too much time out of, or rpm'ed too quickly through its power range because of the 4.56 gear. Big block? Carb tuning (squirters & pump cams) can help with 60' times.
Last edited by Locomotion; 08/14/20 12:33 PM.
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Re: Giving up 60 foot..
[Re: Sammy]
#2809077
08/15/20 12:21 AM
08/15/20 12:21 AM
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Joined: Dec 2005
Posts: 11,566 Fulton County, PA
CMcAllister
Mr. Helpful
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Mr. Helpful
Joined: Dec 2005
Posts: 11,566
Fulton County, PA
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Went from 4.56 gears to 4 10s and picked up .3 and 4mph. 60 foot feels weak now. No mention of what the 60s were or are. ET is made early. Interesting that gear change made that difference. Unless it was just spinning. 56 to a 10 and picked up 4? RPM has to be about the same with both gears.
Last edited by CMcAllister; 08/15/20 12:24 AM.
If the results don't match the theory, change the theory.
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Re: Giving up 60 foot..
[Re: CMcAllister]
#2809140
08/15/20 08:59 AM
08/15/20 08:59 AM
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Joined: Dec 2012
Posts: 1,823 Wind Gap,Pa.
Sammy
OP
top fuel
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OP
top fuel
Joined: Dec 2012
Posts: 1,823
Wind Gap,Pa.
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Went from 4.56 gears to 4 10s and picked up .3 and 4mph. 60 foot feels weak now. No mention of what the 60s were or are. ET is made early. Interesting that gear change made that difference. Unless it was just spinning. 56 to a 10 and picked up 4? RPM has to be about the same with both gears. Went from a 1.15-1.16 60 foot to a 1.18-1.19 Always dead hooked. No spin. Better ET & MPH in worse DA. So I know the car liked the gear change.
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Re: Giving up 60 foot..
[Re: Sammy]
#2809361
08/16/20 01:07 AM
08/16/20 01:07 AM
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Joined: Aug 2003
Posts: 43,176 Bend,OR USA
Cab_Burge
I Win
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I Win
Joined: Aug 2003
Posts: 43,176
Bend,OR USA
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What is your low gear ratio in the tranny? I'm wondering if you could change it to a lower ratio to get back the 60 ft. times I did something similar years ago in my old M.W. stocker, change the rear gear ratio from 4.89 to 4.56 and the low gear ratio from 2.45 to 2.77., that swap also change the second gear ratio but I don't remember by how much now The car went quicker and faster also with those changes
Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
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Re: Giving up 60 foot..
[Re: Cab_Burge]
#2809385
08/16/20 08:14 AM
08/16/20 08:14 AM
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Joined: Dec 2012
Posts: 1,823 Wind Gap,Pa.
Sammy
OP
top fuel
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OP
top fuel
Joined: Dec 2012
Posts: 1,823
Wind Gap,Pa.
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What is your low gear ratio in the tranny? I'm wondering if you could change it to a lower ratio to get back the 60 ft. times I did something similar years ago in my old M.W. stocker, change the rear gear ratio from 4.89 to 4.56 and the low gear ratio from 2.45 to 2.77., that swap also change the second gear ratio but I don't remember by how much now The car went quicker and faster also with those changes Its a Rossler turbo 400. 2.48 1st gear. This is a great idea. Thanks. Will call Rossler in the morning to get the next ratio. Unfortunately Rossler doesn't sell parts so I'll have to bring the transmission there. Or ill see if A1 sells something.
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Re: Giving up 60 foot..
[Re: Sammy]
#2809551
08/16/20 06:20 PM
08/16/20 06:20 PM
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Joined: Dec 2005
Posts: 11,566 Fulton County, PA
CMcAllister
Mr. Helpful
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Mr. Helpful
Joined: Dec 2005
Posts: 11,566
Fulton County, PA
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I'm just wondering how it lost 3 hun in 60 and gained 3 tenths overall. Would like to compare the incrementals on before and after time slips. 3 tenths and 4 MPH is a bunch for that change. Like adding 40 or 50 horsepower.
If the results don't match the theory, change the theory.
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Re: Giving up 60 foot..
[Re: CMcAllister]
#2809559
08/16/20 06:57 PM
08/16/20 06:57 PM
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Joined: Dec 2012
Posts: 1,823 Wind Gap,Pa.
Sammy
OP
top fuel
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OP
top fuel
Joined: Dec 2012
Posts: 1,823
Wind Gap,Pa.
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I'm just wondering how it lost 3 hun in 60 and gained 3 tenths overall. Would like to compare the incrementals on before and after time slips. 3 tenths and 4 MPH is urgenta bunch for that change. Like adding 40 or 50 horsepower. I'm thinking too much gear. Over revving st the stripe. Lazier than I like off the hit but after the 660, it started pulling harder. Crossed the teaps 500rpms less.
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