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04-21-2009, 10:28 AM
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#26
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Join Date: May 2006
Location: Midland Park, NJ
Posts: 1,389
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no force, no flex
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04-21-2009, 02:47 PM
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#27
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Mongo the Meet Coordinator
Join Date: May 2008
Posts: 16,900
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The only way there is no force is if the car is floating in no gravity. Even sitting still there is still a force on the rear end.
How can there be no force? That makes no sense.
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Quote:
Originally Posted by KirkEvil
repo bigals turd gen and part it out to a loving home
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04-21-2009, 03:27 PM
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#28
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Join Date: May 2006
Location: Midland Park, NJ
Posts: 1,389
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rotational force is applied to axles thru the carrier. That doesnt push the carrier back, it just rotates the axles.
The force of the tires pushing the car forward is exerted on the axle bearings which are in line with the lower control arms. If the axle bearings are in line with the lower control arms that is the point of fulcrum. As indicated in that link. by "X" as zero there is no thrust pushing the carrier back.
Think of the LCA location in relitivity to the axle bearing as the piviot point of a see-saw. If the LCA is exactly 1/2 the distance between the carrier and the axle bearing an even load would be dispursed between the axle bearing thrusting forward and the carrier going backwards. If you were 300lbs sitting on one side of the see-saw and someone was only 100 lbs sitting on the other side, that person would always be in the air because 300 lbs is evenly exerted on the other side of the fulcrom point because its directly in the middle. Now picture a see-saw with the fulcrom point directly under the 300 lbs person, there would be no way you could get that 100lbs person in the air, all the force exerted by the 300 person would be directly upon the fulcrom point thus not exerting any force at the other end of the sea saw there would be no way you could get a 30 lbs person in the air.
The location of the LCA's determins which entities force is applied to and what percentage.
Last edited by alamantia; 04-21-2009 at 03:29 PM.
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04-21-2009, 03:34 PM
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#29
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Mongo the Meet Coordinator
Join Date: May 2008
Posts: 16,900
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Well I am just saying that assuming the LCA mount and bearing are close proximity to each other, together they will be the fulcrum and the entire axle tube will flex from the force from the tire. So the axle tube/axle will have an opposite force against the carrier in the center. And even if you discredit that force, the rotational force will distort the axles to an extent too.
Edit: I am not arguing with you, just fyi. I am curious about this.
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Quote:
Originally Posted by KirkEvil
repo bigals turd gen and part it out to a loving home
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Last edited by LTb1ow; 04-21-2009 at 03:40 PM.
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04-25-2009, 02:29 PM
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#30
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Join Date: Aug 2005
Location: Lakewood
Posts: 452
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The axles would bend/snap before being able to push the differential away from the pinion gear like that. I am sure there is some movement but its the stress of the teeth intersecting on such a small surface with more pressure than they where meant to take that kills them. I went threw two 7.5's before I decided to switch to a custom 8.5 but there are alot of ways to make it stronger but it will eventually give way, the ring gear is just too small for the power these cars made stock let alone when you start modding.
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04-25-2009, 09:11 PM
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#31
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Join Date: Jun 2008
Location: Piscataway
Posts: 189
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Quote:
Originally Posted by alamantia
rotational force is applied to axles thru the carrier. That doesnt push the carrier back, it just rotates the axles.
The force of the tires pushing the car forward is exerted on the axle bearings which are in line with the lower control arms. If the axle bearings are in line with the lower control arms that is the point of fulcrum. As indicated in that link. by "X" as zero there is no thrust pushing the carrier back.
Think of the LCA location in relitivity to the axle bearing as the piviot point of a see-saw. If the LCA is exactly 1/2 the distance between the carrier and the axle bearing an even load would be dispursed between the axle bearing thrusting forward and the carrier going backwards. If you were 300lbs sitting on one side of the see-saw and someone was only 100 lbs sitting on the other side, that person would always be in the air because 300 lbs is evenly exerted on the other side of the fulcrom point because its directly in the middle. Now picture a see-saw with the fulcrom point directly under the 300 lbs person, there would be no way you could get that 100lbs person in the air, all the force exerted by the 300 person would be directly upon the fulcrom point thus not exerting any force at the other end of the sea saw there would be no way you could get a 30 lbs person in the air.
The location of the LCA's determins which entities force is applied to and what percentage.
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I agree with this completely it makes sense physics wise, so what would be the easiest thing to do to reinforce my 10 bolt, i only wanna go to the track a few times so im not gonna be putting an extensive amount of force on it this summer.
__________________
"Don't Think, Just Replace Opti"
1996 Firebird Formula M6 Black/Ebony
K&N CAI, Flowmaster Catback Exhaust, MGW Short Shifter, DMH cutout, UMI STB and SFC's, LS1 Front Brakes, Tune by Madtuner
1995 Cherokee Sport 4.0L - Stock...for now
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07-22-2009, 07:30 PM
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#32
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Join Date: Nov 2007
Location: Kutztown,PA
Posts: 74
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15 inch wheel 30x9 good luck
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07-24-2009, 01:49 AM
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#33
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10 Second Club; Has fan club
Join Date: Dec 2005
Location: Delmont nj
Posts: 4,369
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Quote:
Originally Posted by ShowNoPromise
You could also look into the TA covers for the diff. Should help a bit.
But IMO its a waste of money, its going to break, so save money for a 12 bolt etc instead of wasting money on something bound to fail.
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have you ever used a TA cover?
ive used the t/a cover on my 10bolts and it makes them last pretty darn long.
ive broken one 10 bolt rear on street tires when it didnt have a TA cover, the other time i broke teeth off of the ring and pinion. ive had TA covers on 3 different rears, one i wound up selling to a friend and it still worked fine. one on the t/a which had many passes on slicks and drag radials, dumping the clutch at 6k and now the cover is on my camaro's 10bolt and ive had about 10 passes on drag radials so far, the majority being 5k-6k clutch dumps
to the OP- go on LS1tech and get yourself a TA cover for 100bucks and go have some fun.
http://www.youtube.com/watch?v=0mM66dfTeX8 6k launch on DRs in the z28
http://videos.streetfire.net/video/9...-NJ_195982.htm 5-6k clutch dumps on slicks in the t/a. i had more passes than that, just not on video
__________________
01' Z06 62k miles. Vararam, Longtubes, off road xpipe, tuned by me. Times TBA
2001 Corvette, Bolt ons , tuned 10.75@124.56 mph 1.38 60' Sold
1997 Saturn Sc1 5spd DOHC swapped
Bolt ons, decked head, stock intake cam on exhaust side, lotsa weight redux
13.22@102.32 mph 1.93 60'
12's on moda? One day
Last edited by 98tadriver; 07-24-2009 at 01:59 AM.
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07-24-2009, 12:47 PM
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#34
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Join Date: Jun 2008
Location: Piscataway
Posts: 189
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thanx ron im gonna definately look into that now
__________________
"Don't Think, Just Replace Opti"
1996 Firebird Formula M6 Black/Ebony
K&N CAI, Flowmaster Catback Exhaust, MGW Short Shifter, DMH cutout, UMI STB and SFC's, LS1 Front Brakes, Tune by Madtuner
1995 Cherokee Sport 4.0L - Stock...for now
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07-24-2009, 04:50 PM
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#35
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11 Second Club / I <3 LT1s
Join Date: May 2008
Location: Troy, Mi
Posts: 2,642
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Quote:
Originally Posted by vipergtx500
thanx ron im gonna definately look into that now
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I wouldn't go to the track without one. I didn't have one on my rear and once I broke it, it only took 5 more passes after it was put back together for it to break again.
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Vinnie -
00 SS A4- LQ9/LS3/Stalled/3.42s 1.48/11.10/121 mph<-6spd swap in progress.
13 Silverado Z71- Sold 11/16
99 Z28 M6- -H/C/9in - sold 1/13
99 Silverado Z71- The DD - Sold 7/13
03 CBR 600RR - Sold 8/13
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07-24-2009, 05:00 PM
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#36
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Meet Coordinator
Join Date: Jan 2008
Location: brick/pt. pleasant beach
Posts: 19,341
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Quote:
Originally Posted by 98tadriver
have you ever used a TA cover?
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he does have one, yes.
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07-24-2009, 06:39 PM
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#37
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Mongo the Meet Coordinator
Join Date: May 2008
Posts: 16,900
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I haz what?
huh
__________________
Quote:
Originally Posted by KirkEvil
repo bigals turd gen and part it out to a loving home
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07-25-2009, 03:09 AM
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#38
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10 Second Club; Has fan club
Join Date: Dec 2005
Location: Delmont nj
Posts: 4,369
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u haz a 14 second H/C LT1 lolz
6spd f bodies ftmfw
__________________
01' Z06 62k miles. Vararam, Longtubes, off road xpipe, tuned by me. Times TBA
2001 Corvette, Bolt ons , tuned 10.75@124.56 mph 1.38 60' Sold
1997 Saturn Sc1 5spd DOHC swapped
Bolt ons, decked head, stock intake cam on exhaust side, lotsa weight redux
13.22@102.32 mph 1.93 60'
12's on moda? One day
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07-28-2009, 01:15 PM
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#39
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Join Date: Dec 2004
Location: Browns Mills NJ/ Rotondo West FL
Posts: 3,054
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I had a buddy that didnt drag race much and blew 3 rears out of his 99ss...luckily he was still under warranty. W/ these rears you take the chance w/ drag racing regardless of the tires...Id probably run a nitto if you want the least amount of stress on the rear.
__________________
AI HCR 241's , Lunati 223/236 .615/.626 114+2 , Full Exhaust , Ported Fast 92 , Ported LS2 TB , Veraram , 85mm MAF , Circle D 4000 , 3.42's , GTP 36# , CSP Dyno tune. More on the way
420 HP/367 TQ on a Unlocked Converter & still climbing.
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08-01-2009, 08:50 AM
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#40
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Join Date: Mar 2009
Location: S. Orange
Posts: 140
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Quote:
Originally Posted by ShowNoPromise
Run stock 2.73s and ****** tires, problem solved.
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HA! I've got a bracket motor in my car with a manual th400 and i can attest that you can't break a stock rear with 2.7* even with DR's .......believe me i've tried!
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08-01-2009, 10:47 AM
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#41
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10 Second Club; Has fan club
Join Date: Dec 2005
Location: Delmont nj
Posts: 4,369
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i actually broke a 2.73 rear in my near stock 3rd gen back in the day. it mightve been the original rear in it though. if thats the case, it had 200,000 miles on it
__________________
01' Z06 62k miles. Vararam, Longtubes, off road xpipe, tuned by me. Times TBA
2001 Corvette, Bolt ons , tuned 10.75@124.56 mph 1.38 60' Sold
1997 Saturn Sc1 5spd DOHC swapped
Bolt ons, decked head, stock intake cam on exhaust side, lotsa weight redux
13.22@102.32 mph 1.93 60'
12's on moda? One day
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