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Quick times=broken parts for me #1532722 11/12/13 08:29 PM 11/12/13 08:29 PM
Joined: Mar 2003 Posts: 1,632 Lubbock,TX D DavidDean OP top fuel
DavidDean OP top fuel D Joined: Mar 2003 Posts: 1,632 Lubbock,TX	I've just finishing fixing my broken stuff. A couple of weeks ago I headed to Dallas Raceway for the Door Car Only race.I was excited, the first TT netted a new best of 5.66 @ 120.5. The car lived up to its Thrill Ride name with a big wheelie and a 1.241 60'. The fun ended though as I attempted to qualify for the quick 16 on the next pass. When the car launched it wiped out more than 1/3 of the teeth on my super beefy 8 3/4.It had maybe 75? passes on that R & P. I figured the sprag was also shot. When I pulled my 904 I also found it had broken the input shaft as well as laying over the sprag.Alot of work later and I hope to make the leftover nationals race at Abilene after thanks giving.It's obviously time to retire the 8 3/4 and possibly put in a glide. I've also considered building a new 904 w/ a Protrans 2.28 low gear to try to calm the car down some more. I've got a lot invested in 904 junk. 7921971-bracketnationals.jpg (156 downloads)

Re: Quick times=broken parts for me [Re: DavidDean] #1532723 11/12/13 09:04 PM 11/12/13 09:04 PM
Joined: Nov 2009 Posts: 3,410 Belpre,Ohio C CHAPPER master
CHAPPER master C Joined: Nov 2009 Posts: 3,410 Belpre,Ohio	Engine fluids containment system...any build pics & pointers?? If you like drag racing, support your local track.

Re: Quick times=broken parts for me [Re: CHAPPER] #1532724 11/12/13 11:27 PM 11/12/13 11:27 PM
Joined: Jul 2004 Posts: 1,126 Abilene,Texas R ram87 super stock
ram87 super stock R Joined: Jul 2004 Posts: 1,126 Abilene,Texas	Might be time for a glide. I try to drag my tired old rear out to see you after Thanksgiving. I am working for Lowe's and never know my work schedule until the week before.

Re: Quick times=broken parts for me [Re: DavidDean] #1532725 11/12/13 11:50 PM 11/12/13 11:50 PM
Joined: Oct 2011 Posts: 3,036 bean town ....Ca W WHITEDART master
WHITEDART master W Joined: Oct 2011 Posts: 3,036 bean town ....Ca	was that a stock input or an after market one and do you think the rear end had some thing to do with it braking In the 8s N/A.with Brett miller W8's 5.07 at 133 at 2700lb

Re: Quick times=broken parts for me [Re: DavidDean] #1532726 11/13/13 09:00 AM 11/13/13 09:00 AM
Joined: Aug 2008 Posts: 4,068 Mo. racerx master
racerx master Joined: Aug 2008 Posts: 4,068 Mo.	Who's r&p u runing(ratio),was this with a stock housing w/bracing..Thax

Re: Quick times=broken parts for me [Re: WHITEDART] #1532727 11/13/13 10:22 AM 11/13/13 10:22 AM
Joined: May 2003 Posts: 13,187 aZLiViN J J_BODY I Live Here
J_BODY I Live Here J Joined: May 2003 Posts: 13,187 aZLiViN	Quote: was that a stock input or an after market one and do you think the rear end had some thing to do with it braking absolutely the rear braking had something to do with the input shaft breaking. Same shock on the system is what also kills the sprag. I was surprised to see David's car still running the 8.75 when I saw it at Vegas.

Re: Quick times=broken parts for me [Re: J_BODY] #1532728 11/13/13 12:26 PM 11/13/13 12:26 PM
Joined: Jan 2012 Posts: 2,639 Stuttgart, Arkansas rickseeman master
rickseeman master Joined: Jan 2012 Posts: 2,639 Stuttgart, Arkansas	I'm definitely not trying to be a smart a** here but an 8-3/4 in a 5 second car? A 904 in a 5 second car? You know better than to try that. God created Danas for a reason. 2011 Drag Pak Challenger

Re: Quick times=broken parts for me [Re: racerx] #1532729 11/13/13 12:32 PM 11/13/13 12:32 PM
Joined: Jan 2003 Posts: 74,992 U.S.S.A. JohnRR I Win
JohnRR I Win Joined: Jan 2003 Posts: 74,992 U.S.S.A.	Quote: Who's r&p u runing(ratio),was this with a stock housing w/bracing..Thax I'm sure it has all the tricks applied to the housing but in the end the weak link is the ring and pinion teeth, you can strengthen everything else it's still going to rip the teeth off those 2 gears at some point.

Re: Quick times=broken parts for me [Re: J_BODY] #1532730 11/13/13 12:42 PM 11/13/13 12:42 PM
Joined: Mar 2003 Posts: 1,632 Lubbock,TX D DavidDean OP top fuel
DavidDean OP top fuel D Joined: Mar 2003 Posts: 1,632 Lubbock,TX	Here's a pic of the belly pan. Most people on this site seem to favor a diaper. I like the pan its easier to fit, make and maintain the engine. A number of my top sportsman friends also use a simular pan. It follows the NHRA guidelines frame rail to frame rail trans housing to infront of the balancer. It has a screen in the bottom to hold the same pad as in a Jegs diaper. 2" + tall on the sides. My Bob's Profab K member made the installation possible.I just kept making cardboard patterns untill I had something that would work. My local chassis guy (Mike Carpenter)gave me lots of pointers and welded up the final design. Hey Lynn it would be great to see ya there! The input shaft was stock and so was the replacement I hope it'll stand up for a while.I would agree the rear breaking led to the input shaft breaking. The R&P was and is 3.91 ratio. I shift this motor about 6800 rpm. The rear has all the tricks you can have in an 8 3/4. Billet caps, back braced gusseted outside as well as inside. It's not an alunimium housing though. I looking at a dana 60 as a replacement. I'm trying to decide between a glide and and up dating my 904 w/ 2.28 1st gear. My 904 has some fairly nice stuff inside and its pretty fast. Hey Lynn it would be great to see ya there! 7922680-bellypanupperside.JPG (56 downloads) Last edited by DavidDean; 11/13/13 12:48 PM.

Re: Quick times=broken parts for me [Re: DavidDean] #1532731 11/13/13 01:30 PM 11/13/13 01:30 PM
Joined: Jan 2003 Posts: 5,484 SoCal Brian Hafliger master
Brian Hafliger master Joined: Jan 2003 Posts: 5,484 SoCal	David did you end up changing the block or ??? Brian Hafliger

Re: Quick times=broken parts for me [Re: Brian Hafliger] #1532732 11/13/13 01:56 PM 11/13/13 01:56 PM
Joined: Mar 2003 Posts: 1,632 Lubbock,TX D DavidDean OP top fuel
DavidDean OP top fuel D Joined: Mar 2003 Posts: 1,632 Lubbock,TX	I had Sunset repair the block and Ive routed water to the back of the heads and changed the tune up a little .So far so good

Re: Quick times=broken parts for me [Re: DavidDean] #1532733 11/13/13 02:11 PM 11/13/13 02:11 PM
Joined: Nov 2009 Posts: 3,410 Belpre,Ohio C CHAPPER master
CHAPPER master C Joined: Nov 2009 Posts: 3,410 Belpre,Ohio	Quote: Here's a pic of the belly pan. Most people on this site seem to favor a diaper. I like the pan its easier to fit, make and maintain the engine. A number of my top sportsman friends also use a simular pan. It follows the NHRA guidelines frame rail to frame rail trans housing to infront of the balancer. It has a screen in the bottom to hold the same pad as in a Jegs diaper. 2" + tall on the sides. My Bob's Profab K member made the installation possible.I just kept making cardboard patterns untill I had something that would work. My local chassis guy (Mike Carpenter)gave me lots of pointers and welded up the final design. Hey Lynn it would be great to see ya there! The input shaft was stock and so was the replacement I hope it'll stand up for a while.I would agree the rear breaking led to the input shaft breaking. The R&P was and is 3.91 ratio. I shift this motor about 6800 rpm. The rear has all the tricks you can have in an 8 3/4. Billet caps, back braced gusseted outside as well as inside. It's not an alunimium housing though. I looking at a dana 60 as a replacement. I'm trying to decide between a glide and and up dating my 904 w/ 2.28 1st gear. My 904 has some fairly nice stuff inside and its pretty fast. Hey Lynn it would be great to see ya there! thanks. If you like drag racing, support your local track.

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