Re: 727 explosion at Milan last night....
[Re: dustergirl340]
#2392356
10/24/17 02:51 PM
10/24/17 02:51 PM
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Joined: May 2015
Posts: 1,134 Lost in Time
Iowan
super stock
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super stock
Joined: May 2015
Posts: 1,134
Lost in Time
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I'm not sure why my trans has lasted so long but I was told from the start to roll through the water and do your burnout at the very edge of the water, get the slicks hot enough to dry when you roll forward. I have always started burn out in second. I did a dry hop and staged. No problem thousands of pass's.
Are drag radials that much different than slicks?
Have a great day Iowan
"obsolete is neat"
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Re: 727 explosion at Milan last night....
[Re: ProSport]
#2392497
10/24/17 07:31 PM
10/24/17 07:31 PM
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Joined: May 2004
Posts: 3,210 robin hood country
deaks
master
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master
Joined: May 2004
Posts: 3,210
robin hood country
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I've been emailing this guy about the blanket he offers, I saw his car at a car show. His blanket is not cheap, but it sounds like a perfect fitting piece that is bullet proof and covers everything. His email is chpenterprise@neo.rr.com Phone number is 330-584-8045.
I do not know him and I have not seen his blanket yet. Coming from Nottingham, England i'm curious to know why he calls himself Robin Hood. Lol
69 Dart GTS 440 mopar .590 cam, Edelbrock heads, 3200# best et 6.45, 106.78, 10.14, 132.88 mph, 1.47 60ft best 60ft 1.36
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Re: 727 explosion at Milan last night....
[Re: RHB]
#2392610
10/24/17 10:32 PM
10/24/17 10:32 PM
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Joined: Feb 2003
Posts: 991 Addison,IL
OUTLAWSSAA
super stock
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super stock
Joined: Feb 2003
Posts: 991
Addison,IL
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Sure glad to hear he is ok. I am the guy in NE. Ohio that DoubleD was referring too. When a transmission blows like this it is a literal BOMB! I have researched this problem for the last 2 years. All the engineers I have conversed with (all of the major ballistic material suppliers), all agreed that this is a extreme condition and would require some very serious material. I will say this: metal hood types allow parts to escape forwards (towards your feet) and backwards to the tail housing. Carbon fiber usually works "IF" you have Alum. drums. Steel drums can and do shatter carbon fiber. Billet drums are "NOT" the total solution! Using billet drums allows them to spin faster before exploding. Unfortunately since spinning faster they release even more energy than a stock drum. Therefore causing a even larger explosion. Something to think about. If that blanket costs you $400, then the manufacturer's cost was half or less than half of that to make a profit. Part of that half cost is packaging, buckles, strapping, an outside covering and labor to sew it together. So how much actual ballistic material are you really getting for your money???? Now go look at ballistic materials and their costs. You also have to know how much of it "layers" (there are many, many types of Kevlar and others) will pass the SFI test. Now go to the SFI Foundation site and look up what it takes to pass their test. Better yet go look up the military test standard they use (MIL-STD-662D-V50). If you would like to explore this subject further email me here. I beg to differ with you on the drum statement. There was a magazine article that covered the billet steel 4140 drum that Rick at A&A came out with. They tested it on some sort of a spin tester and I believe it went to 36,000rpm before they stopped it, and there was nothing,no cracks, no flaws, nothing. So even if your shifting at 10,000 and your sprage lets go, your still covered.
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Re: 727 explosion at Milan last night....
[Re: FurryStump]
#2392788
10/25/17 09:42 AM
10/25/17 09:42 AM
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Joined: Nov 2013
Posts: 595 Nashville, Tennessee
Tempest
mopar
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mopar
Joined: Nov 2013
Posts: 595
Nashville, Tennessee
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Asking this question again for clarification. If one does not have an aftermarket drum and LBA, will launching car in 2nd avoid (for the most part) this issue? if the trans has the capability of auto shift, no. Shifter in 2nd will still be in low. No I meant a manual VB in a high HP/TQ car. I don't know who built my trans, so I tend to launch it and do burnouts in 2nd. It's a pro street car with a lot of gear and a decent amount of stall. It leaves pretty good in 2nd, just wanted to confirm or not if this method reduces the possibility of this situation.
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Re: 727 explosion at Milan last night....
[Re: Tempest]
#2393165
10/26/17 12:22 AM
10/26/17 12:22 AM
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Joined: Jul 2006
Posts: 4,319 Puyallup, WA
StealthWedge67
master
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master
Joined: Jul 2006
Posts: 4,319
Puyallup, WA
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Asking this question again for clarification. If one does not have an aftermarket drum and LBA, will launching car in 2nd avoid (for the most part) this issue? if the trans has the capability of auto shift, no. Shifter in 2nd will still be in low. No I meant a manual VB in a high HP/TQ car. I don't know who built my trans, so I tend to launch it and do burnouts in 2nd. It's a pro street car with a lot of gear and a decent amount of stall. It leaves pretty good in 2nd, just wanted to confirm or not if this method reduces the possibility of this situation. Wait.... You Launch the car in 2nd??.... with a manual VB 727 ?? Why would you do that?
LemonWedge - Street heavy / Strip ready - 11.07 @ 120
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Re: 727 explosion at Milan last night....
[Re: dustergirl340]
#2393192
10/26/17 01:13 AM
10/26/17 01:13 AM
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Joined: Jan 2003
Posts: 2,763 Walton's Mountain, Pa
Steve1118
master
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master
Joined: Jan 2003
Posts: 2,763
Walton's Mountain, Pa
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I've purposely kept quiet on this post, but I'm one of the geezers who have been racing the same Hemi Dodge for almost 50 (48 years, actually) years with no incidents. In fact, I can only recall even seeing two incidents over those years, both caused by driver error.
I still use a "J" converter, a Cheetah VB. standard stuff. It was pounded into my head back in the day the cause for trans explosions, and to always check after a first gear drive line failure, or excessive spinning. The easiest way to check is to pull the driveshaft, put a driveshaft yoke into the rear of the trans, and spin it. It should only spin one way easily. If it spins both ways easily, the sprag is turned and it's got come apart. I have always started my burnouts in second, and then go to high. I use first gear only to put it on the trailer, or to pull it into the garage, or to leave the starting line where it's pulled second real quick. Not hard, just pay attention.
I can't help but notice that some of the cars on here who complain about it happening are dual purpose, street/strip cars. To me, that is probably a lot of their issue. Go out on the street, blow the tires off of it in low gear, take it the track, and then, pow. My guess is that in a lot of cases, that is what happened. I'm sure there are some explosions that are legitimate, but, to be frank, I've never seen one that didn't have an explanation for it. Now, I'm sure that there will be a pile of you on here who start arguing with me. That's OK, whatever. Do whatever you think is necessary. But, one can save themselves a lot of hassle and money by just doing it the right way.
But, when I hear guys saying how they are scared to drive one, that's a bit over the top. It's not like jumping into a combat zone with the 82nd Airborne. Just know what you are doing and pay attention. Not hard.
Of course, there were also the neutral starts we played with back in the late sixties, but, that's another story....Dick Oldfield and Ron Mancini can tell you all about them....
Last edited by Steve1118; 10/26/17 01:50 AM.
"Old age and treachery trumps youth and enthusiasm, every time!" East Central Director / Chrysler Power Magazine www.reasbeckracing.webs.com
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Re: 727 explosion at Milan last night....
[Re: dustergirl340]
#2393221
10/26/17 02:18 AM
10/26/17 02:18 AM
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Joined: May 2003
Posts: 13,185 aZLiViN
J_BODY
I Live Here
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I Live Here
Joined: May 2003
Posts: 13,185
aZLiViN
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having been around the results personally (friends car luckily), none of our rides hit the track after that without a steel drum and blanket or shield. If you are racing with a 727, you really don't want this to happen. We were fortunate that Chuck Lofgren was at the track that weekend and came by and educated us on the whole deal as we did not have a clue as to what happened (good ole pre internet days ) Prior to this happening I had been street racing for a couple years and track racing for only a couple. I had broken a ring gear when I had a 8.75 rear in my Mirada. Not knowing any better we simply threw in another gear set and went on our way.... got lucky. I'm proof like many that it doesn't happen every time.... but knowing what we all know now, it's not worth the risk IMHO.
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Re: 727 explosion at Milan last night....
[Re: Steve1118]
#2393296
10/26/17 11:51 AM
10/26/17 11:51 AM
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Joined: Jan 2003
Posts: 1,237 North Central, Indiana
Roughbird72
pro stock
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pro stock
Joined: Jan 2003
Posts: 1,237
North Central, Indiana
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I still use a "J" converter, a Cheetah VB. standard stuff. It was pounded into my head back in the day the cause for trans explosions, and to always check after a first gear drive line failure, or excessive spinning. The easiest way to check is to pull the driveshaft, put a driveshaft yoke into the rear of the trans, and spin it. It should only spin one way easily. If it spins both ways easily, the sprag is turned and it's got come apart.
Huh, didn't know that
72 Plymouth Roadrunner 11.08@123.25
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Re: 727 explosion at Milan last night....
[Re: Steve1118]
#2393397
10/26/17 03:34 PM
10/26/17 03:34 PM
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Joined: Jan 2003
Posts: 25,750 Rio Linda, CA
John_Kunkel
Too Many Posts
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Too Many Posts
Joined: Jan 2003
Posts: 25,750
Rio Linda, CA
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The easiest way to check is to pull the driveshaft, put a driveshaft yoke into the rear of the trans, and spin it. It should only spin one way easily. If it spins both ways easily, the sprag is turned and it's got come apart. Many sprag failures might seem to be sudden but they're usually preceded by flattening of the rollers. A sprag with several flattened rollers might pass the "turn it backwards" test (which is highly judgemental) but might still be in distress. The only way to positively judge the condition of the sprag is a periodic visual inspection. A lot of us old-timers used to abuse the sprag and never have a failure but there's a difference between doing it wrong and getting away with it and doing it right....I'm one of the lucky ones who did it wrong out of ignorance. No excuse in this day and age.
The INTERNET, the MISinformation superhighway
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Re: 727 explosion at Milan last night....
[Re: NANKET]
#2393537
10/26/17 09:42 PM
10/26/17 09:42 PM
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Joined: Feb 2016
Posts: 200 PA
Scully
enthusiast
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enthusiast
Joined: Feb 2016
Posts: 200
PA
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Like Steve 1118 says, watch what you are doing. Back in the day thats all we had, there was no LBA manual valve body. The was no updated drum that was reasonably priced, so nobody used them. Remember the 1980's! All the old days 727 racers are not limping around. I got my first B&M LBA manual valve body in 72, I think they started making them around 68.
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Re: 727 explosion at Milan last night....
[Re: dustergirl340]
#2395287
10/30/17 12:11 PM
10/30/17 12:11 PM
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Joined: Jan 2003
Posts: 2,763 Walton's Mountain, Pa
Steve1118
master
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master
Joined: Jan 2003
Posts: 2,763
Walton's Mountain, Pa
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Ah, the voice of reason from Brother Bob. Different applications call for different things. But, Torqueflites are good, good trans.
I'm still getting around OK, despite racing a torqueflite for all these years. Except for some arthritis and a little gout, the knees and feet still work OK. I spent many, many years watching Bagwell, Marshall, BG, and many other Hemi and Maxie SS cars make thousands of passes over the years with no issue by doing what I do. Don't forget, most of that stuff wasn't around back then. Make more HP, better chassis, and all and of course the demands are different. A blanket is like belts and harness, helmet, anything else. Should always be on there, just in case.
The problem I have with threads like this is that everything gets worked up so the average kid bracket racing his 440 Road Runner has the mindset of an infantryman going into a firefight.
It's not necessary. You've got kids scared to death, and spending money they don't have. So, they never get to the track. Some of the guys here are very free with others' money.
Just pay attention...do it the right way, and you won't have any problem. Get the right product for the application, use good parts. . If you have a dual purpose car with big HP, which seems to be the in thing, and you are running around laying tire in low gear all the time to impress the local kiddies, you'd better be careful. For what it's worth, the trans in my car is the same one BG did for me a long, long time ago. Change fluid, maintain, and pay attention. True in everything. Works everytime
Last edited by Steve1118; 10/30/17 12:20 PM.
"Old age and treachery trumps youth and enthusiasm, every time!" East Central Director / Chrysler Power Magazine www.reasbeckracing.webs.com
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Re: 727 explosion at Milan last night....
[Re: B G Racing]
#2395451
10/30/17 04:02 PM
10/30/17 04:02 PM
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Joined: Jan 2003
Posts: 25,750 Rio Linda, CA
John_Kunkel
Too Many Posts
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Too Many Posts
Joined: Jan 2003
Posts: 25,750
Rio Linda, CA
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If you insist on using a stock drum on anything above a mid ten second race car then I suggest you use the best shield you can find.
I wouldn't base drum selection on ET. A twelve-second car that is capable of 8000+ rpm on a free-wind overspeed can explode a stock drum.
The INTERNET, the MISinformation superhighway
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Re: 727 explosion at Milan last night....
[Re: John_Kunkel]
#2395892
10/31/17 08:16 AM
10/31/17 08:16 AM
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Joined: Mar 2006
Posts: 9,910 Eighty Four, PA
B G Racing
master
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master
Joined: Mar 2006
Posts: 9,910
Eighty Four, PA
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If you insist on using a stock drum on anything above a mid ten second race car then I suggest you use the best shield you can find.
I wouldn't base drum selection on ET. A twelve-second car that is capable of 8000+ rpm on a free-wind overspeed can explode a stock drum. We are not basing in on ET alone read all of the statement that includes proper technique and safty equipment.The last statement your quoting is a caution and suggestion.We all know what will happen if RPM is exceeded in low or second gear and the overrunning clutch fails(which it will)I learn a long time ago no one can guard against stupidity and if a person can't use common sence he should run a complete containment shield around himself for all the "what ifs" that can happen.If a person free winds a 12 second car it's because he has done something stupid. Respectfully Bob
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