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New best 60' with my 8 3/4
#1643475
07/07/14 06:21 PM
07/07/14 06:21 PM
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Joined: Mar 2009
Posts: 1,058
bigfork mn
dragram440
OP
super stock
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OP
super stock
Joined: Mar 2009
Posts: 1,058
bigfork mn
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I went racing all last weekend and just cant get over how good the 60' times are for the setup. It ran 1.47 for the best and seems to just be working. The car has the stock type springs and used Rancho shocks that I just bought off of here and cheep monroe shocks up front, Pinion snubber. I leave off of a idle with the foot brake. The 8 3/4 has around 120 passes on it so I think I will open it up and check it out just to make sure everything is still good. I was also thinking maybe I should put the Mark Williams cap on it. Think the cap is worth it? I was maybe thinking of trying to add some more power.
67' charger 499 RB
10.57 at 127
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Re: New best 60' with my 8 3/4
[Re: dragram440]
#1643476
07/07/14 06:32 PM
07/07/14 06:32 PM
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Joined: Jan 2003
Posts: 8,028
Tulsa OK
Bad340fish
master
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master
Joined: Jan 2003
Posts: 8,028
Tulsa OK
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I am sure you will find that everything looks fine up until it doesn't.
68 Barracuda Formula S 340
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Re: New best 60' with my 8 3/4
[Re: dragram440]
#1643477
07/07/14 06:46 PM
07/07/14 06:46 PM
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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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The cap does help... but the pinion flex is what will kill it... on a heavy car you have greater friction on the tire and that causes more flex.. I've been running my alum center for about 9 years now(racing, not the time I've let the car sit).. it has some nice stuff in it but my car is light and its less apt to break this .. I had 600+ passes on my stock 8 3/4 with just a back brace till it spit the caps off(the caps went first but still due to flex on the pinion) 
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Re: New best 60' with my 8 3/4
[Re: dragram440]
#1643481
07/07/14 07:23 PM
07/07/14 07:23 PM
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Joined: Oct 2003
Posts: 11,684
W. Kentucky
justinp61
I Live Here
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I Live Here
Joined: Oct 2003
Posts: 11,684
W. Kentucky
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Quote:
Bullet proof? I would like to know what is bulletproof? Anyone on here ever break a dana 60 or a 9"? They all break at some point! 
Noooooooooooo..........9" rears never break.  BTW I went 1.38 one time with my 8 3/4.
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Re: New best 60' with my 8 3/4
[Re: Thumperdart]
#1643483
07/07/14 07:59 PM
07/07/14 07:59 PM
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Joined: Aug 2008
Posts: 4,071
Mo.
racerx
master
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master
Joined: Aug 2008
Posts: 4,071
Mo.
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Quote:
Quote:
Quote:
Bullet proof? I would like to know what is bulletproof? Anyone on here ever break a dana 60 or a 9"? They all break at some point!
Noooooooooooo..........9" rears never break. BTW I went 1.38 one time with my 8 3/4.
Gotcha beat.............went two 1.36`s and 6.22`s back to back but I don`t race much......... 
1 more I went 1.28's on my 8 3/4
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Re: New best 60' with my 8 3/4
[Re: Thumperdart]
#1643485
07/08/14 05:40 AM
07/08/14 05:40 AM
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Joined: Feb 2005
Posts: 5,221
Branson, Mo.
joedust451
super gas
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super gas
Joined: Feb 2005
Posts: 5,221
Branson, Mo.
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I made at least 250 1.50-1.56 with stock axles at 3100 lbs. in my 8.3/4. Just last year i drove my 78 cutlass to the track a few times & pulled off 1.72-1.73 60fts. with a worn out 7.5" rearend on big MT DRs. , It howled all the way there & back home, 110 mile round trip, the car weighs about 3400 lbs.
Last edited by joedust451; 07/08/14 05:42 AM.
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Re: New best 60' with my 8 3/4
[Re: Thumperdart]
#1643486
07/08/14 07:49 AM
07/08/14 07:49 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:
Quote:
Quote:
Quote:
Quote:
Bullet proof? I would like to know what is bulletproof? Anyone on here ever break a dana 60 or a 9"? They all break at some point!
Noooooooooooo..........9" rears never break. BTW I went 1.38 one time with my 8 3/4.
Gotcha beat.............went two 1.36`s and 6.22`s back to back but I don`t race much.........
1 more I went 1.28's on my 8 3/4
So much for that.............
I have a bunch of 1.19s on my 8 3/4.. I had a ton of
1.24s - 1.25s on the stock 8 3/4 with just a back brace
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Re: New best 60' with my 8 3/4
[Re: dragram440]
#1643491
07/08/14 06:07 PM
07/08/14 06:07 PM
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Joined: Jan 2003
Posts: 6,591
Canton, Ohio
Sport440
master
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master
Joined: Jan 2003
Posts: 6,591
Canton, Ohio
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I dont know what your car weighs, but Im sure its no liteweight. At best 3200 or so?? With your ET and 493, I think I would skip on the expense of the MW cap and the Machining that goes along with that and step up to a better rear axle. Apply the finances in a different direction IMO, Especially if your going to be adding some power to a already strong combo. 
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Re: New best 60' with my 8 3/4
[Re: Thumperdart]
#1643494
07/08/14 06:28 PM
07/08/14 06:28 PM
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Joined: Mar 2009
Posts: 1,058
bigfork mn
dragram440
OP
super stock
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OP
super stock
Joined: Mar 2009
Posts: 1,058
bigfork mn
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My car certainly does not fly. I finally won my first round in eliminations last weekend, only took 3 1/2 years. I do have 35 spline axles, spool, back brace, and with 3.91 gears I get a good contact patch from the ring to the pinion. I do have a 742 carrier. Are there any benifits from carrier to carrier?
67' charger 499 RB
10.57 at 127
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