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Re: Mark Williams Billet Caps for 8 3/4
[Re: B3422W5]
#1892900
08/16/15 12:03 PM
08/16/15 12:03 PM
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Joined: Jul 2004
Posts: 19,317
State of confusion
Thumperdart
I Live Here
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I Live Here
Joined: Jul 2004
Posts: 19,317
State of confusion
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Hmm? 3200# car, 9.79 @ 135.5 ... takes around 590-600rwhp to do that, 700hp seems legit to me. My ex car weighs 3220 currently. A while back the motor made 705 ish horsepower on a dyno with Best machine. That motor went 9.62@ 140 on super stock springs. That almost 5 more mph than the above. Huge difference When I had the car( little bit different combo) it went 135@ 3350. I figured it made about 640-650 REAL horsepower. 135@ 3250 ISNT 700 horsepower, it's a great elapsed time, but it isn't 700. More like probably 640-645. Again, first pass off the trailer and definitely a 9.60 based on being lean and other small issues plus a lot of you guys race in really good air back east etc. It was around 800+ ft. corrected iirc and definitely better than the normal 2000-3000+ and higher we see here on the west side. We`ll soon see how it runs w/all of my mods and at 3050 lbs................ 
72 Dart 470 n/a BB stroker street car `THUMPER`...Check me out on FB Dominic Thumper for videos and lots of carb pics......760-900-3895.....
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Re: Mark Williams Billet Caps for 8 3/4
[Re: dartman366]
#1893099
08/16/15 06:54 PM
08/16/15 06:54 PM
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Joined: Jan 2005
Posts: 2,540
Milwaukee WI
TRENDZ
master
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master
Joined: Jan 2005
Posts: 2,540
Milwaukee WI
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Aftermarket ring and pinions are ALL made from exactly the same stuff. Yet some rears shell teeth off like chiclets and some hardly ever break. What, you think 8.75 gears are made weaker than Danas, or that slight increase in ring gear size "fixes" the issue...........hell no. It's ALL about stuff moving that is not supposed to move. It's been pointed out several times, that 8.75s and Danas, as well as Fords have roughly the same diameter pinion shaft and there is little difference in ring gear diameters..............so, if you look at it from something resembling a rational thought process, that leaves only the CASE as the inherent problem. Most all cast rears have cast caps. Why don't the rest of them spit caps off? only real difference is the heat treat of that same material, as for the 8.75 they are a good diff for their intended purpose, but I changed to a D-60 after grenadeing my 8.75 and never looked back. Here... Rear End Technical Information Pro Gears and Street Gears Pro gears are made from 9310 and then heat treated. Itis a softer alloy than the 8620 Street gears. The softer 9310 alloy allows the gear to absorb higher impact loads that are generated in drag racing without developing cracks. A harder 8620 street gear could shatter under the same loads. As a side effect the "Pro" gears are not the best choice for street use as they will wear faster. Also available in the "Pro" gears is a large pinion with a 35 spline shaft for high powered applications. This requires a bearing change in the pinion support as well as a 35 spline pinion yoke. Gears termed 9-1/2" are also available for the 9" thirdmember. They offer a slight strength advantage over a standard 9" gear.
"use it 'till it breaks, replace as needed"
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Re: Mark Williams Billet Caps for 8 3/4
[Re: TRENDZ]
#1893109
08/16/15 07:04 PM
08/16/15 07:04 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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Aftermarket ring and pinions are ALL made from exactly the same stuff. Yet some rears shell teeth off like chiclets and some hardly ever break. What, you think 8.75 gears are made weaker than Danas, or that slight increase in ring gear size "fixes" the issue...........hell no. It's ALL about stuff moving that is not supposed to move. It's been pointed out several times, that 8.75s and Danas, as well as Fords have roughly the same diameter pinion shaft and there is little difference in ring gear diameters..............so, if you look at it from something resembling a rational thought process, that leaves only the CASE as the inherent problem. Most all cast rears have cast caps. Why don't the rest of them spit caps off? only real difference is the heat treat of that same material, as for the 8.75 they are a good diff for their intended purpose, but I changed to a D-60 after grenadeing my 8.75 and never looked back. Here... Rear End Technical Information Pro Gears and Street Gears Pro gears are made from 9310 and then heat treated. Itis a softer alloy than the 8620 Street gears. The softer 9310 alloy allows the gear to absorb higher impact loads that are generated in drag racing without developing cracks. A harder 8620 street gear could shatter under the same loads. As a side effect the "Pro" gears are not the best choice for street use as they will wear faster. Also available in the "Pro" gears is a large pinion with a 35 spline shaft for high powered applications. This requires a bearing change in the pinion support as well as a 35 spline pinion yoke. Gears termed 9-1/2" are also available for the 9" thirdmember. They offer a slight strength advantage over a standard 9" gear. Another thing with the 8 3/4.. they dont have many gear choices in the pro gears.. I've always used the street gear.. mainly due to the lack of pro gear choices but they have been holding fine due to being a light car.. I have the street gears in my Rampage also because its 90% street 
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Re: Mark Williams Billet Caps for 8 3/4
[Re: runnerrt]
#1893139
08/16/15 07:44 PM
08/16/15 07:44 PM
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Joined: Jan 2005
Posts: 2,540
Milwaukee WI
TRENDZ
master
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master
Joined: Jan 2005
Posts: 2,540
Milwaukee WI
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Good luck finding ANY ratio pro gears for an 8 3/4.
"use it 'till it breaks, replace as needed"
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Re: Mark Williams Billet Caps for 8 3/4
[Re: TRENDZ]
#1893143
08/16/15 07:46 PM
08/16/15 07:46 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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Good luck finding ANY ratio pro gears for an 8 3/4. I dont even bother...I have been running the street gears the whole time
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Re: Mark Williams Billet Caps for 8 3/4
[Re: TRENDZ]
#1893443
08/17/15 05:23 AM
08/17/15 05:23 AM
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Joined: Nov 2004
Posts: 6,890
North Alabama
Monte_Smith
master
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master
Joined: Nov 2004
Posts: 6,890
North Alabama
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Aftermarket ring and pinions are ALL made from exactly the same stuff. Yet some rears shell teeth off like chiclets and some hardly ever break. What, you think 8.75 gears are made weaker than Danas, or that slight increase in ring gear size "fixes" the issue...........hell no. It's ALL about stuff moving that is not supposed to move. It's been pointed out several times, that 8.75s and Danas, as well as Fords have roughly the same diameter pinion shaft and there is little difference in ring gear diameters..............so, if you look at it from something resembling a rational thought process, that leaves only the CASE as the inherent problem. Most all cast rears have cast caps. Why don't the rest of them spit caps off? only real difference is the heat treat of that same material, as for the 8.75 they are a good diff for their intended purpose, but I changed to a D-60 after grenadeing my 8.75 and never looked back. Here... Rear End Technical Information Pro Gears and Street Gears Pro gears are made from 9310 and then heat treated. Itis a softer alloy than the 8620 Street gears. The softer 9310 alloy allows the gear to absorb higher impact loads that are generated in drag racing without developing cracks. A harder 8620 street gear could shatter under the same loads. As a side effect the "Pro" gears are not the best choice for street use as they will wear faster. Also available in the "Pro" gears is a large pinion with a 35 spline shaft for high powered applications. This requires a bearing change in the pinion support as well as a 35 spline pinion yoke. Gears termed 9-1/2" are also available for the 9" thirdmember. They offer a slight strength advantage over a standard 9" gear. I think everyone knows this........so was there a point to this?
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Re: Mark Williams Billet Caps for 8 3/4
[Re: Monte_Smith]
#1893451
08/17/15 08:13 AM
08/17/15 08:13 AM
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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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Aftermarket ring and pinions are ALL made from exactly the same stuff. Yet some rears shell teeth off like chiclets and some hardly ever break. What, you think 8.75 gears are made weaker than Danas, or that slight increase in ring gear size "fixes" the issue...........hell no. It's ALL about stuff moving that is not supposed to move. It's been pointed out several times, that 8.75s and Danas, as well as Fords have roughly the same diameter pinion shaft and there is little difference in ring gear diameters..............so, if you look at it from something resembling a rational thought process, that leaves only the CASE as the inherent problem. Most all cast rears have cast caps. Why don't the rest of them spit caps off? only real difference is the heat treat of that same material, as for the 8.75 they are a good diff for their intended purpose, but I changed to a D-60 after grenadeing my 8.75 and never looked back. Here... Rear End Technical Information Pro Gears and Street Gears Pro gears are made from 9310 and then heat treated. Itis a softer alloy than the 8620 Street gears. The softer 9310 alloy allows the gear to absorb higher impact loads that are generated in drag racing without developing cracks. A harder 8620 street gear could shatter under the same loads. As a side effect the "Pro" gears are not the best choice for street use as they will wear faster. Also available in the "Pro" gears is a large pinion with a 35 spline shaft for high powered applications. This requires a bearing change in the pinion support as well as a 35 spline pinion yoke. Gears termed 9-1/2" are also available for the 9" thirdmember. They offer a slight strength advantage over a standard 9" gear. I think everyone knows this........so was there a point to this? No, not everyone knows. I've never ran or had the need to run pro gears so I didn't know what the difference. Don't be a dick.
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Re: Mark Williams Billet Caps for 8 3/4
[Re: runnerrt]
#1893458
08/17/15 09:34 AM
08/17/15 09:34 AM
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Joined: Jan 2005
Posts: 2,540
Milwaukee WI
TRENDZ
master
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master
Joined: Jan 2005
Posts: 2,540
Milwaukee WI
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Just pulling back the curtain.
"use it 'till it breaks, replace as needed"
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(come on! thats funny no matter who ya are!) 
