Rear end question..
Thread Starter
Team Owner
Joined: Jul 2001
Posts: 182,997
Likes: 88
From: Lakeland, FL
Cruise-In IV-V-VI-VII-VIII Veteran
St. Jude Donor '03, '06, '17
Rear end question..
When running on a good track - my 60' times are anywhere from 1.676 to 1.75's... So far I haven't had any issues with my rear end but I'm really concerned that it's going to break if I continue running that kind of 60' times... I wonder how much more my stock rear end will be able to take. Is there any cheaper way to upgrade the rear end to be able to handle consistently that kind of abuse or am I worrying too much and the stock rear should be able to handle all that power. I'm really happy with the output of my engine and don't really want to increase it's output because of concerns that the rear end won't be able to handle it (inclusing bearings and spindles etc...) Are there any cheaper alternatives to upgrade the rear end? For now - I'm not thinking in putting a Ford 9 inch into the car....
Any suggestions?
Thanks in advance!
:cheers:
Olivier
[Modified by GrandSportC3, 11:26 AM 11/21/2002]
[Modified by GrandSportC3, 11:28 AM 11/21/2002]
Any suggestions?
Thanks in advance!
:cheers:
Olivier
[Modified by GrandSportC3, 11:26 AM 11/21/2002]
[Modified by GrandSportC3, 11:28 AM 11/21/2002]
Thread Starter
Team Owner
Joined: Jul 2001
Posts: 182,997
Likes: 88
From: Lakeland, FL
Cruise-In IV-V-VI-VII-VIII Veteran
St. Jude Donor '03, '06, '17
Re: Rear end question.. (shoptek)
I consider myself a rearend expert, but truth be told, I'm more of a chest man :lol:
Sorry olivier......I couldn't let it pass!!!! :cheers:
Sorry olivier......I couldn't let it pass!!!! :cheers:
Le Mans Master
Joined: Dec 2000
Posts: 5,245
Likes: 25
From: Blue Ridge Georgia
Re: Rear end question.. (GrandSportC3)
GrandSport, do you reminder the video that was on the forum about 6 months ago that showed one of the guys at the line and his back tires both going a different direction. ( away from the car at a high rate of speed)
Thread Starter
Team Owner
Joined: Jul 2001
Posts: 182,997
Likes: 88
From: Lakeland, FL
Cruise-In IV-V-VI-VII-VIII Veteran
St. Jude Donor '03, '06, '17
Re: Rear end question.. (Paul 75 L82)
GrandSport, do you reminder the video that was on the forum about 6 months ago that showed one of the guys at the line and his back tires both going a different direction. ( away from the car at a high rate of speed)
:cheers:
Olivier
Race Director
Joined: Jul 2002
Posts: 13,858
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From: A 12/8 man in a 4/4 world
Re: Rear end question.. (shoptek)
I consider myself a rearend expert, but truth be told, I'm more of a chest man :lol:
Sorry olivier......I couldn't let it pass!!!! :cheers:
Sorry olivier......I couldn't let it pass!!!! :cheers:
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Safety Car
Joined: Oct 2000
Posts: 4,080
Likes: 565
From: Allen TX
Re: Rear end question.. (GrandSportC3)
Are you concerned about the carrier, the half-shafts or both?
I have to be honest...I am downright _shocked_ at the wimpy driveshaft in this '69 BB I'm picking up. I mean it is tiny (diameter, I'm talking about). Looks like a bomb waiting to go off, IMHO.
Someone out there has to make some upgraded half-shafts for these cars. They do for the C5s.
I have to be honest...I am downright _shocked_ at the wimpy driveshaft in this '69 BB I'm picking up. I mean it is tiny (diameter, I'm talking about). Looks like a bomb waiting to go off, IMHO.
Someone out there has to make some upgraded half-shafts for these cars. They do for the C5s.
Team Owner
Joined: May 2001
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From: Exiled to Richmond, VA - Finally sold my house in Murfreesboro, TN ?? Corner of "Bumf*&k and 'You've got a purdy mouth'."
CI 6-7-8 Veteran
CI-VIII Burnout Champ
St. Jude Donor '06-'10, '13
Re: Rear end question.. (WA 2 FST)
Someone out there has to make some upgraded half-shafts for these cars. They do for the C5s.
Thread Starter
Team Owner
Joined: Jul 2001
Posts: 182,997
Likes: 88
From: Lakeland, FL
Cruise-In IV-V-VI-VII-VIII Veteran
St. Jude Donor '03, '06, '17
Re: Rear end question.. (WA 2 FST)
Are you concerned about the carrier, the half-shafts or both?
I have to be honest...I am downright _shocked_ at the wimpy driveshaft in this '69 BB I'm picking up. I mean it is tiny (diameter, I'm talking about). Looks like a bomb waiting to go off, IMHO.
Someone out there has to make some upgraded half-shafts for these cars. They do for the C5s.
I have to be honest...I am downright _shocked_ at the wimpy driveshaft in this '69 BB I'm picking up. I mean it is tiny (diameter, I'm talking about). Looks like a bomb waiting to go off, IMHO.
Someone out there has to make some upgraded half-shafts for these cars. They do for the C5s.
:cheers:
Olivier
Thread Starter
Team Owner
Joined: Jul 2001
Posts: 182,997
Likes: 88
From: Lakeland, FL
Cruise-In IV-V-VI-VII-VIII Veteran
St. Jude Donor '03, '06, '17
Re: Rear end question.. (BSeery)
Someone out there has to make some upgraded half-shafts for these cars. They do for the C5s.
That's because most of the C5's 1/2 shafts can't handel the stock HP in that car. Good traction one day and your 1/2 shafts or rear end housing can go :seeya .
:cheers:
Olivier
Safety Car
Joined: Dec 1999
Posts: 4,148
Likes: 5
From: Roxbury NJ
Re: Rear end question.. (WA 2 FST)
Wes, upgraded halfshafts and driveshafts are available from a bunch of places. Inland Empire, Dennys Driveshaft, Tom's. The stock driveshaft is definitely small, but everyone seems to break the posi, u-joints, and/or inner/outer yokes first. I've never heard of a driveshaft failure (except for the u-joint), but everyone with a stronger than stock rear usually upgrades the driveshaft at the same time. The main problem with our axles is the cost to significantly upgrade. It's a pretty strong stock rear, but to upgrade the strength of the entire assemly is a $4k proposition.
Olivier, I doubt anyone will tell you a stock rear and 1.6 60' times are a good match ;) Eveyone is scared of your post... :lol: If it were reliable, we wouldn't need Tom's 30 spline setup.
Olivier, I doubt anyone will tell you a stock rear and 1.6 60' times are a good match ;) Eveyone is scared of your post... :lol: If it were reliable, we wouldn't need Tom's 30 spline setup.
Le Mans Master
Joined: Apr 2000
Posts: 7,562
Likes: 9
From: B'Ville NY
Cruise-In III Veteran
St. Jude Donor '05
Re: Rear end question.. (Flareside)
Olivier I would get Dragvettes half-shaft safety loops just for bcheap insurance against the probability that something does break ;) .
I usually end up upgrading things as I break them :sad: .
[Modified by SmokedTires, 8:37 AM 11/22/2002]
I usually end up upgrading things as I break them :sad: .
[Modified by SmokedTires, 8:37 AM 11/22/2002]
Race Director
Joined: Mar 1999
Posts: 10,258
Likes: 1
From: Calif.
Re: Rear end question.. (GrandSportC3)
When running on a good track - my 60' times are anywhere from 1.676 to 1.75's...
Thread Starter
Team Owner
Joined: Jul 2001
Posts: 182,997
Likes: 88
From: Lakeland, FL
Cruise-In IV-V-VI-VII-VIII Veteran
St. Jude Donor '03, '06, '17
Re: Rear end question.. (Flareside)
Wes, upgraded halfshafts and driveshafts are available from a bunch of places. Inland Empire, Dennys Driveshaft, Tom's. The stock driveshaft is definitely small, but everyone seems to break the posi, u-joints, and/or inner/outer yokes first. I've never heard of a driveshaft failure (except for the u-joint), but everyone with a stronger than stock rear usually upgrades the driveshaft at the same time. The main problem with our axles is the cost to significantly upgrade. It's a pretty strong stock rear, but to upgrade the strength of the entire assemly is a $4k proposition.
Olivier, I doubt anyone will tell you a stock rear and 1.6 60' times are a good match ;) Eveyone is scared of your post... :lol: If it were reliable, we wouldn't need Tom's 30 spline setup.
Olivier, I doubt anyone will tell you a stock rear and 1.6 60' times are a good match ;) Eveyone is scared of your post... :lol: If it were reliable, we wouldn't need Tom's 30 spline setup.
:cheers:
Olivier
Thread Starter
Team Owner
Joined: Jul 2001
Posts: 182,997
Likes: 88
From: Lakeland, FL
Cruise-In IV-V-VI-VII-VIII Veteran
St. Jude Donor '03, '06, '17
Re: Rear end question.. (The Dude)
When running on a good track - my 60' times are anywhere from 1.676 to 1.75's...
I get those same kind of 60' times when it's running. And I'm pretty concerned about breakiing stuff--yokes, u-joints, diff., etc.--because I've still got 3.08 gears in the rear. That's gotta be putting hellacious stress on things in the driveline--kind of like taking a 10-speed bike, putting it in 10th gear and tring to start from a dead stop as quickly as you can. I really need 3.70s or 3.90s to relieve some of the stress.
I get those same kind of 60' times when it's running. And I'm pretty concerned about breakiing stuff--yokes, u-joints, diff., etc.--because I've still got 3.08 gears in the rear. That's gotta be putting hellacious stress on things in the driveline--kind of like taking a 10-speed bike, putting it in 10th gear and tring to start from a dead stop as quickly as you can. I really need 3.70s or 3.90s to relieve some of the stress.
I was actually concerned about my gearing being too short... (3.27 first gear with 3.55 rear) but I'm really happy with my setup after racing it a couple of times...
:cheers:
Olivier
Team Owner
Joined: Feb 1999
Posts: 34,455
Likes: 665
From: Republic of Texas
Re: Rear end question.. (GrandSportC3)
Believe it or not, our rear ends are tougher than you think. The weakest link is the IRS set up, but the 12 bolt "chunk" is pretty brute. My father told me when he raced his '69 427 (4spd and 4.11) gears from '69-'72 he never tore his rear end. He and his buddy (also with a '69) were at the track every weekend. There is a local guy at the track (The Louisiana Crew can vouch for this) with his '69 383 that runs 9.5's. He LAUNCHES on Nitrous, pulls the front end a couple feet off the ground. He told me he has the HD U-joints and HD rear end cover and the rest is stock. I didn't buy it so I asked my friend who is his best friend and he said the same thing.
Take it for what it's worth. :cheers:
Take it for what it's worth. :cheers:
Thread Starter
Team Owner
Joined: Jul 2001
Posts: 182,997
Likes: 88
From: Lakeland, FL
Cruise-In IV-V-VI-VII-VIII Veteran
St. Jude Donor '03, '06, '17
Re: Rear end question.. (Corey 68)
Corey,
I hope that you are right... I should find out by myself....
:cheers:
Olivier
I hope that you are right... I should find out by myself....
:cheers:
Olivier
Race Director
Joined: Sep 2002
Posts: 10,362
Likes: 5
From: San Diego - Deep Within The State of CONFUSION!
Re: Rear end question.. (GrandSportC3)
Man, I'm HOPING they are "stronger than we think!"
After putting the 383 together and upgrading every OTHER thing on the car, that rear end better last! :smash:
After putting the 383 together and upgrading every OTHER thing on the car, that rear end better last! :smash: