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New best...The good, the bad, and the ugly. **UPDATE**
#1263385
07/07/12 12:13 PM
07/07/12 12:13 PM
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Joined: Jul 2006
Posts: 4,319
Puyallup, WA
StealthWedge67
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Puyallup, WA
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Was out for the first time of the season last night at Pacific: The Good: Car ran a new best and I dipped my toe in the 11-second streetcar pool. 11.92 @ 111+. It hit harder with the new converter and cut over a tenth off my previous best 60' @ 1.65 (previous best 1.78). As usual at the track, met nice people, and ran into a few friends, and had a great time.  The Bad: Could just be the heat (over 80 yesterday with heavy air). but it was down on MPH by about 1.5 from previous best. I was suprised with this, because one of the changes I made over the winter was a sealed fresh air system that I thought would be worth a couple of MPH. Maybe I just need to play with jetting (???).  The UGLY: Had to push the car onto the trailer..... last run resulted in a broken rear end. I just rebuilt this 8-3/4" in the fall, and it had been quiet and acting just fine until the fateful last run. launched and made it about 5 ft before BANG. Some of the guys that pushed me onto the trailer said they thought maybe it was just an axle because it wasnt making any ill sounds as they pushed it (???). I'll get it apart sometime soon and post the carnage. 
Last edited by GEnsrud; 07/30/12 01:32 AM.
LemonWedge - Street heavy / Strip ready - 11.07 @ 120
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Re: New best..... The good, the bad, and the ugly.
[Re: StealthWedge67]
#1263386
07/07/12 12:28 PM
07/07/12 12:28 PM
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Joined: Jun 2003
Posts: 52,972
Romeo MI
MR_P_BODY
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Master
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Posts: 52,972
Romeo MI
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Bummer on the bad part... congrats on the 60'... yes jetting is normal but if the air was bad that sure didnt help 
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Re: New best..... The good, the bad, and the ugly.
[Re: Thumperdart]
#1263389
07/07/12 03:18 PM
07/07/12 03:18 PM
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Joined: Jul 2006
Posts: 4,319
Puyallup, WA
StealthWedge67
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Puyallup, WA
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The ring and pinion and differential came from Dr. Diff. I think they're motive gear R&P, & and Eaton S-G unit. Pig is a 742, gears are 3.91's, axles are stock. Car weigh's about 3750.
LemonWedge - Street heavy / Strip ready - 11.07 @ 120
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Re: New best..... The good, the bad, and the ugly.
[Re: StealthWedge67]
#1263391
07/07/12 04:36 PM
07/07/12 04:36 PM
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Joined: Jun 2003
Posts: 52,972
Romeo MI
MR_P_BODY
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Master
Joined: Jun 2003
Posts: 52,972
Romeo MI
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Quote:
The ring and pinion and differential came from Dr. Diff. I think they're motive gear R&P, & and Eaton S-G unit. Pig is a 742, gears are 3.91's, axles are stock. Car weigh's about 3750.
I would say your buddies are right on a axle if they
didnt hear any clunking
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Re: New best..... The good, the bad, and the ugly.
[Re: Chris2581]
#1263393
07/07/12 06:28 PM
07/07/12 06:28 PM
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Joined: Aug 2003
Posts: 3,245
Between a rock & a hard place
cudadoug
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master
Joined: Aug 2003
Posts: 3,245
Between a rock & a hard place
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Most likely an axle, as said if there's no noise when rolling it around. Those axles were probably groaning with pain on each lauch at that weight...LOL! MAKE SURE you check the sprague in the trans (unless it's a bolt in). Don't ask me how I know... Don't be discouraged by the lack of gain by adding the fresh air. First thing unless the conditions were exact or you have weather station data you'll have to start from stratch. Also keep in mind that changing the torque converter can change the demands of the fuel system depending on the flash at the hit, shift point recovery and overall slippage. With two major changes since your last run you don't know what each one did/didn't do...all the more reason to start fresh with testing the fuel curve. Now get that rear apart and let's see what you broke!
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Re: New best..... The good, the bad, and the ugly.
[Re: StealthWedge67]
#1263395
07/07/12 09:17 PM
07/07/12 09:17 PM
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Joined: Jan 2003
Posts: 16,925
NC
440Jim
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 16,925
NC
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Quote:
...axles are stock. Car weigh's about 3750.
At that weight, it is hard on stock 8-3/4 axles. Some factory parts hold up better than others, but on my 3700 lb Cuda running about the same ET (but 1.55 sixty foots) it broke the stock axles the first summer. Now it has Moser's.
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Re: New best..... The good, the bad, and the ugly.
[Re: 383man]
#1263397
07/09/12 12:17 AM
07/09/12 12:17 AM
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Joined: Jan 2003
Posts: 6,266
Renton Washington
Triple Threat
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master
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Posts: 6,266
Renton Washington
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Good to see you Friday night, and sorry again about the broken parts. Hopefully it is just an axle and the trans survived as well.
MPH is probably a little down due to the air. It wasn't terrible, but not very good either for around here.
-Dustin
67 Dart, 9 second, 392" G3 Hemi
68 Barracuda 340 F/SA
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Re: New best..... The good, the bad, and the ugly.
[Re: Wicked49670dart]
#1263399
07/17/12 01:31 AM
07/17/12 01:31 AM
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Joined: Nov 2004
Posts: 3,517
pacific northwest
Stroker Scamp
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master
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pacific northwest
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did you get a chance to check it out yet?
footbrake N/A SB 408 Scamp 10.10 @ 132 street/strip
73 Duster 340 street strip 12.79 @ 105
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Re: New best..... The good, the bad, and the ugly.
[Re: Stroker Scamp]
#1263400
07/17/12 12:06 PM
07/17/12 12:06 PM
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Joined: Jul 2006
Posts: 4,319
Puyallup, WA
StealthWedge67
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Call me a P-O-S, but would you believe NO? My daughter is leaving for college in 2 weeks, and we're having a big send-off party. Every extra minute has been taken getting the yards and house ready, as well as spending time with her. The car will wait, She won't..... Time has been spent in order of priority lately. I'll post as soon as I get the chance. Thanks for checking in. 
LemonWedge - Street heavy / Strip ready - 11.07 @ 120
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Re: New best..... The good, the bad, and the ugly.
[Re: StealthWedge67]
#1263401
07/30/12 01:19 AM
07/30/12 01:19 AM
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Joined: Jul 2006
Posts: 4,319
Puyallup, WA
StealthWedge67
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Puyallup, WA
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well, I got the rear end apart today. No such luck with the axles... they were fine. It was the differenial (again). Side gears in the powerlock unit broke just like last year. Looks like I was extremely lucky though, as somehow there are pieces of gear laying in the housing but nothing got into the ring & pinion, so I should be able to re-use my 3.91's (if I choose to go with the 8-3/4 again???... I've got an offer for a Dana on the table as well.)
LemonWedge - Street heavy / Strip ready - 11.07 @ 120
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Re: New best..... The good, the bad, and the ugly.
[Re: Triple Threat]
#1263403
07/30/12 02:37 AM
07/30/12 02:37 AM
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Joined: Jul 2006
Posts: 4,319
Puyallup, WA
StealthWedge67
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Quote:
Quote:
I've got an offer for a Dana on the table as well.
Do it and don't look back, you'll never have to worry again.
If it was a B-body Dana, I'd call it a no brainer, but its a Dana 60-2 (smaller axle tubes) out of a Jeep pickup truck. A local moparts member offered it to me for a song, which is great! However, It would need to be narrowed and have new perches mounted, It needs the axles to be redrilled for mopar bolt pattern, and I would also have to shorten my drive line. I can't do any of those things myself, so I'd have to pay to have them done. I know it would be the right direction to go, but I just don't have the $1200 (approx.) it would cost.
I think that if I go with a Detroit Locker style diff in the 8-3/4" instead of the powerlock unit, it should be plenty strong to hold up to my car, and at less than half of what it would cost me to do the Dana. I don't know.... 
Last edited by GEnsrud; 07/30/12 03:27 AM.
LemonWedge - Street heavy / Strip ready - 11.07 @ 120
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on the breakage.........what gears and axles are you running?
Have you pulled it apart to verify what broke yet? Who set em up?
