New Worst! Kaboom! UPDATE X2 Added pictures of Head - Moparts Forums

Register Log In Moparts Forums Unlawfl's Race & Engine Tech New Worst! Kaboom! UPDATE X2 Added pictures of Head

Print Thread

Page 5 of 6

1

2

3

4

5

6

Re: New Worst! Kaboom! UPDATE Added pictures of Valve [Re: Triple Threat] #1306212 09/19/12 11:16 PM 09/19/12 11:16 PM
Joined: Jan 2003 Posts: 6,266 Renton Washington T Triple Threat OP master
Triple Threat OP master T Joined: Jan 2003 Posts: 6,266 Renton Washington	7386712-IMG_2698.JPG (308 downloads)

Re: New Worst! Kaboom! UPDATE Added pictures of Valve [Re: Triple Threat] #1306213 09/19/12 11:18 PM 09/19/12 11:18 PM
Joined: Jan 2003 Posts: 6,266 Renton Washington T Triple Threat OP master
Triple Threat OP master T Joined: Jan 2003 Posts: 6,266 Renton Washington	7386715-IMG_2692.JPG (268 downloads)

Re: New Worst! Kaboom! UPDATE Added pictures of Valve [Re: Triple Threat] #1306214 09/19/12 11:23 PM 09/19/12 11:23 PM
Joined: Aug 2003 Posts: 43,218 Bend,OR USA C Cab_Burge I Win
Cab_Burge I Win C Joined: Aug 2003 Posts: 43,218 Bend,OR USA	I think I would contact Manley on that for them to do a failure analysis on that valve Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)

Re: New Worst! Kaboom! UPDATE Added pictures of Valve [Re: Triple Threat] #1306215 09/19/12 11:26 PM 09/19/12 11:26 PM
Joined: Feb 2006 Posts: 2,379 MD Kevins493 top fuel
Kevins493 top fuel Joined: Feb 2006 Posts: 2,379 MD	Looking at the stem you can see very clear indications of crack propagation followed by ductile failure. There may have been a surface defect on the one side that caused it to crack, maybe from machining, etc..

Re: New Worst! Kaboom! UPDATE Added pictures of Valve [Re: Kevins493] #1306216 09/20/12 01:16 AM 09/20/12 01:16 AM
Joined: Aug 2003 Posts: 787 Eastern WA P ProStock1320 super stock
ProStock1320 super stock P Joined: Aug 2003 Posts: 787 Eastern WA	JB Weld it, you'll be fine... Seriously, I hate it for ya'. Put out the call for parts if you need some help.

Re: New Worst! Kaboom! UPDATE Added pictures of Valve [Re: ProStock1320] #1306217 09/20/12 01:44 AM 09/20/12 01:44 AM
Joined: Jul 2006 Posts: 4,319 Puyallup, WA S StealthWedge67 master
StealthWedge67 master S Joined: Jul 2006 Posts: 4,319 Puyallup, WA	WOW.... So sorry to see this post, Dustin! That sucks! not much more to say. My first thought: go big block. Build a low-deck 451 or 470. You'll go just as fast, and it'll be more durable. But I also realize you probably have a lot of small block stuff left over that would cut the cost of a new motor...... tough call. Where's the old 408 these days??? LemonWedge - Street heavy / Strip ready - 11.07 @ 120

Re: New Worst! Kaboom! UPDATE Added pictures of Valve [Re: StealthWedge67] #1306218 09/20/12 01:58 AM 09/20/12 01:58 AM
Joined: Jan 2003 Posts: 6,266 Renton Washington T Triple Threat OP master
Triple Threat OP master T Joined: Jan 2003 Posts: 6,266 Renton Washington	Quote: My first thought: go big block. Where's the old 408 these days??? My thought as well, but I have ZERO big block stuff. The old engine was a nothing special 340, cast piston, stock rod, stock crank. Its got well over 1000 passes on it and 5 years of abuse. I robbed the heads and other parts out of it to build this engine, so its not ready to go at all. I think its racing days are over, still runs great, but needs to go in a cruiser, not my car..... apparently i'm hard on stuff. -Dustin 67 Dart, 9 second, 392" G3 Hemi 68 Barracuda 340 F/SA

Re: New Worst! Kaboom! UPDATE Added pictures of Valve [Re: Triple Threat] #1306219 09/20/12 02:33 AM 09/20/12 02:33 AM
Joined: Aug 2004 Posts: 2,128 sweden S sshemi top fuel
sshemi top fuel S Joined: Aug 2004 Posts: 2,128 sweden	Really sorry to see it, what a mess!!

Re: New Worst! Kaboom! UPDATE Added pictures of Valve [Re: sshemi] #1306220 09/20/12 02:51 AM 09/20/12 02:51 AM
Joined: Jan 2003 Posts: 5,486 SoCal Brian Hafliger master
Brian Hafliger master Joined: Jan 2003 Posts: 5,486 SoCal	That really sucks!! Very sorry to see this. Brian Brian Hafliger

Re: New Worst! Kaboom! UPDATE Added pictures of Valve [Re: Brian Hafliger] #1306221 09/20/12 10:35 AM 09/20/12 10:35 AM
Joined: Mar 2007 Posts: 12,008 Finally a HUSKER again Moparnut426 I Live Here
Moparnut426 I Live Here Joined: Mar 2007 Posts: 12,008 Finally a HUSKER again	Is that a solid cam, Sorry Im caching on this late, really sucks for ya. Was there any signs of valve float?

Re: New Worst! Kaboom! UPDATE Added pictures of Valve [Re: Moparnut426] #1306222 09/20/12 12:41 PM 09/20/12 12:41 PM
Joined: Jan 2003 Posts: 6,266 Renton Washington T Triple Threat OP master
Triple Threat OP master T Joined: Jan 2003 Posts: 6,266 Renton Washington	Yep solid cam, 263/268@.050 .... Now its a "3/4 race" cam No signs of float really, when it got hotter in the summer It would occasionally miss slightly in high gear, that went away as the air got better again. I'll check that spring for pressure when I get a chance. Not really in the mood to touch it the last couple days. -Dustin 67 Dart, 9 second, 392" G3 Hemi 68 Barracuda 340 F/SA

Re: New Worst! Kaboom! UPDATE Added pictures of Valve [Re: Triple Threat] #1306223 09/20/12 01:22 PM 09/20/12 01:22 PM
Joined: Feb 2009 Posts: 1,532 off the grid 340B5 pro stock
340B5 pro stock Joined: Feb 2009 Posts: 1,532 off the grid	I do believe you've got a good shot at winning the winter carnage thread contest. Yeah, it's got a smallblock.

Re: New Worst! Kaboom! UPDATE Added pictures of Valve [Re: 340B5] #1306224 09/20/12 01:26 PM 09/20/12 01:26 PM
Joined: Jan 2003 Posts: 6,266 Renton Washington T Triple Threat OP master
Triple Threat OP master T Joined: Jan 2003 Posts: 6,266 Renton Washington	Quote: I do believe you've got a good shot at winning the winter carnage thread contest. For the sake of everyone else here, I sincerely hope I do.

Re: New Worst! Kaboom! UPDATE Added pictures of Valve [Re: Triple Threat] #1306225 09/20/12 01:31 PM 09/20/12 01:31 PM
Joined: Jan 2003 Posts: 42,714 Spokane Washington ScottSmith_Harms Mr Wizzard
ScottSmith_Harms Mr Wizzard Joined: Jan 2003 Posts: 42,714 Spokane Washington	Seems like it might have been old damage (the small crack) from an older mishap (over reved it maybe caught a piston and tweeked it a bit causing the crack a while ago?) and then it finally let go.

Re: New Worst! Kaboom! UPDATE Added pictures of Valve [Re: Kevins493] #1306226 09/20/12 01:58 PM 09/20/12 01:58 PM
Joined: Jan 2003 Posts: 16,928 NC 440Jim I Live Here
440Jim I Live Here Joined: Jan 2003 Posts: 16,928 NC	Quote: Looking at the stem you can see very clear indications of crack propagation followed by ductile failure. There may have been a surface defect on the one side that caused it to crack, maybe from machining, etc.. I think this illustrates what you are saying. 7387432-valve_stem_beachmarks.jpg (177 downloads)

Re: New Worst! Kaboom! UPDATE Added pictures of Valve [Re: Triple Threat] #1306227 09/20/12 07:33 PM 09/20/12 07:33 PM
Joined: Feb 2009 Posts: 1,532 off the grid 340B5 pro stock
340B5 pro stock Joined: Feb 2009 Posts: 1,532 off the grid	Quote: Quote: I do believe you've got a good shot at winning the winter carnage thread contest. For the sake of everyone else here, I sincerely hope I do. Definately sukz. The worst I've ever seen, and I've seen a few. Yeah, it's got a smallblock.

Re: New Worst! Kaboom! UPDATE Added pictures of Valve [Re: Triple Threat] #1306228 09/20/12 07:39 PM 09/20/12 07:39 PM
Joined: May 2004 Posts: 12,394 Taxes & Virus's R-US, NY Dragula I Live Here
Dragula I Live Here Joined: May 2004 Posts: 12,394 Taxes & Virus's R-US, NY	Too bad you weren't closer. I would work a deal with you on my W2 408 motor. It would be up to the task of 200 passes a year. Just pulled it because the hemi is done. I put about 8 passes on it as it was just built... Last edited by Dragula; 09/20/12 07:40 PM. '70 Cuda,...605 EFI Hemi Street Car (6.20 best pass, 1.33 60ft) https://www.youtube.com/watch?v=WYw6RA-k5Bk (6.25 at 108.75mph from inside car) https://www.youtube.com/watch?v=3zQEb9uxFng (6.25 at 108mph from outside car) https://www.youtube.com/watch?v=JCvfzsC4NgM (9.9) '66 Barracuda AWB Stretched nose Blown 440 Car in build stage '71 Duster Drag Car 400 Low Deck 512 best 6.002 at 115.44mph https://www.youtube.com/watch?v=Znuo3jMUXTk

Re: New Worst! Kaboom! UPDATE Added pictures of Valve [Re: Dragula] #1306229 09/20/12 08:03 PM 09/20/12 08:03 PM
Joined: Jul 2012 Posts: 153 Plant city fl 7 70Dart499 member
70Dart499 member 7 Joined: Jul 2012 Posts: 153 Plant city fl	Man, that sucks, I know how you feel, on my last car, I had a rod break in the lights, and it looked almost that bad! 1970 Dart Drag Car

Re: New Worst! Kaboom! UPDATE Added pictures of Valve [Re: 440Jim] #1306230 09/20/12 09:05 PM 09/20/12 09:05 PM
Joined: Feb 2006 Posts: 2,379 MD Kevins493 top fuel
Kevins493 top fuel Joined: Feb 2006 Posts: 2,379 MD	Quote: Quote: Looking at the stem you can see very clear indications of crack propagation followed by ductile failure. There may have been a surface defect on the one side that caused it to crack, maybe from machining, etc.. I think this illustrates what you are saying. Thanks Jim! that does a much better job than my explanation.

Re: New Worst! Kaboom! UPDATE Added pictures of Valve [Re: 70Dart499] #1306231 09/20/12 09:09 PM 09/20/12 09:09 PM
Joined: Jan 2007 Posts: 3,695 nc E emarine01 master
emarine01 master E Joined: Jan 2007 Posts: 3,695 nc	Its good to see you still have some humor,.... 3/4 cam .....

Page 5 of 6

1

2

3

4

5

6

Moderated by Al_Alguire, Hotwheelsjr, moparts, not_a_charger, RangerDan440, tboomer

Hop To

Powered by UBB.threads™ PHP Forum Software 7.7.1