Re: 3.55 to 3.91 or 4.10
[Re: stumpy]
#170072
12/18/08 04:34 PM
12/18/08 04:34 PM
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Joined: Nov 2004
Posts: 7,647
Houston Texas
PAINT IT BLACK
Got a CHIP on my shoulder
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Got a CHIP on my shoulder
Joined: Nov 2004
Posts: 7,647
Houston Texas
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Wow. What a cool site. Thank you. I have thought long and hard about whether or not to go with a Passon OD unit in my Cuda, as well as the Bee, but that site helped me decide that since the Cuda has a 3.91 and all I really save is about 700 RPM at 80 mph (significant, yes, but worth it?), I think I'll just leave it as is. With the Bee, I have to buy new gears anyway, so I'll still go with the OD unit for that one since it'll be nice to have a taller gear in it. If I run a 4.56 in the Bee with the Passon gear set, I'll have a final drive at 80 mph at just about where the Cuda is now - 3,700 RPMs. VERY helpful and cool site! 
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Re: 3.55 to 3.91 or 4.10
[Re: coronetkid]
#170078
12/18/08 06:01 PM
12/18/08 06:01 PM
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Joined: Mar 2005
Posts: 3,141
Central NC
gch
master
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master
Joined: Mar 2005
Posts: 3,141
Central NC
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Quote:
383 906 heads 850 double pump carb performer rpm intake 3500 stall cam not 100% sure would have to dig out paperwork
It depends on your shift rpm.I think 3.91's are fine for mostly street.4.10's will e.t. better if you can hook but are no fun on the street. 
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Re: 3.55 to 3.91 or 4.10
[Re: gch]
#170079
12/18/08 08:01 PM
12/18/08 08:01 PM
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Joined: Oct 2003
Posts: 3,698
NE Oklahoma
Von
master
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master
Joined: Oct 2003
Posts: 3,698
NE Oklahoma
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Quote:
[I think 3.91's are fine for mostly street.4.10's will e.t. better if you can hook but are no fun on the street.
Not much RPM difference between 3.91s and 4.10s.
If 4.10s are no fun, then 3.91s shouldnt be either. 
I run 4.30s with a 28 inch tall tire and it doesnt bother me at all.
72 RR, Pump gas 440, 452s, 3800 lbs, Corked, ET Radials,. 11.33@117.72.
Same car, bone stock 346s, 9.5 comp, baby solid. 12.24@110.
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Re: 3.55 to 3.91 or 4.10
[Re: PAINT IT BLACK]
#170080
12/18/08 08:04 PM
12/18/08 08:04 PM
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Joined: Jan 2003
Posts: 3,616
Riverside, Ca
G_bob
master
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master
Joined: Jan 2003
Posts: 3,616
Riverside, Ca
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Quote:
Wow. What a cool site. Thank you.
I have thought long and hard about whether or not to go with a Passon OD unit in my Cuda, as well as the Bee, but that site helped me decide that since the Cuda has a 3.91 and all I really save is about 700 RPM at 80 mph (significant, yes, but worth it?), I think I'll just leave it as is. With the Bee, I have to buy new gears anyway, so I'll still go with the OD unit for that one since it'll be nice to have a taller gear in it. If I run a 4.56 in the Bee with the Passon gear set, I'll have a final drive at 80 mph at just about where the Cuda is now - 3,700 RPMs.
VERY helpful and cool site!
I've got 3.91's in the challenger with a 28" tall tire. I put a gearvendors unit on it and it is night and day difference running down the freeway. Well worth it for me.
My
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Re: 3.55 to 3.91 or 4.10
[Re: 1_WILD_RT]
#170081
12/18/08 08:29 PM
12/18/08 08:29 PM
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Joined: Feb 2005
Posts: 4,313
Prospect, PA
BSB67
master
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master
Joined: Feb 2005
Posts: 4,313
Prospect, PA
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Quote:
The limiting factor is gonna be traction...4.10 is a fun gear but you'll need to feather it out of the hole or you'll just blow the tires off...
 If you are traction limited on the launch now, you will not see much difference. What is your 60', et and mph?
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Re: 3.55 to 3.91 or 4.10
[Re: RapidRobert]
#170086
12/19/08 08:38 AM
12/19/08 08:38 AM
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Anonymous
Unregistered
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Anonymous
Unregistered
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Quote:
Quote:
looking for better 1/4 mile time
4.10
3.91's are ok but if you want a stop light burner, go lower!! i have 4.30's and love them!! i'll drive on freeways but limit my speed to 65 mph. that puts me at 3500 or so
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