Done for the season...(Update) - Moparts Forums

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Re: Done for the season... [Re: Dads426] #837947 10/26/10 01:44 PM 10/26/10 01:44 PM
Joined: Jan 2003 Posts: 24,562 Brookeville, Md Mr.Yuck Not enough dumb comments...yet
Mr.Yuck Not enough dumb comments...yet Joined: Jan 2003 Posts: 24,562 Brookeville, Md	what do the say about an intake...lol I was running ISKY 8005A springs "Valve Springs, Dual, 1.530 in. Outside Diameter, 400 lbs./in. Rate, 1.160 in. Coil Bind Height" as advised by the cam maker. I doubt they lacked the spring pressure as mentioned above.

Re: Done for the season... [Re: Mr.Yuck] #837948 10/26/10 01:48 PM 10/26/10 01:48 PM
Joined: Jan 2003 Posts: 16,928 NC 440Jim I Live Here
440Jim I Live Here Joined: Jan 2003 Posts: 16,928 NC	Quote: I was running ISKY 8005A springs When the installed height is set correctly (1.87"), those springs are perfect for the job (135/360), IMO. Many people have run those springs with the MP 590 cam, and even slightly more aggressive cams. At least to 6800 rpm or so. 1993 Daytona, 5.50 at 130mph (1/8) 1.19 sixty ft (PG). Link to 572 B1 - Part 1

Re: Done for the season... [Re: 440Jim] #837949 10/26/10 01:52 PM 10/26/10 01:52 PM
Joined: Jan 2003 Posts: 24,562 Brookeville, Md Mr.Yuck Not enough dumb comments...yet
Mr.Yuck Not enough dumb comments...yet Joined: Jan 2003 Posts: 24,562 Brookeville, Md	Quote: Quote: I was running ISKY 8005A springs When the installed height is set correctly, those springs are perfect for the job (135/360), IMO. Many people have run those springs with the MP 590 cam, and even slightly more aggressive cams. At least to 6800 rpm or so. yeah mine were set...I was running a custom scott brown cam. 242/254 548/540 solid w/ 1.5 roller rockers. Had MAYBE 200 miles on the motor...zero runs. Wasted 2 brand new diamond pistons, hacked up on wall bad and buggered up one seat and possibly 2 guides as the ex valve bent as well. At least I was only doing maybe 2500 rpm.

Re: Done for the season... [Re: Dads426] #837950 10/26/10 02:09 PM 10/26/10 02:09 PM
Joined: May 2003 Posts: 2,414 St. Croix, US Virgin Islands D David_in_St_Croi top fuel
David_in_St_Croi top fuel D Joined: May 2003 Posts: 2,414 St. Croix, US Virgin Islands	Quote: Springs are Trick Flow with seat/open pressure spec'd for the cam (MP 590). I checked them before installation. Valves are Ferrea 6217 & 6250. Check the spring pressure now and compare to the original pressure. I lost an exhaust valve head to low spring pressure from tired springs. At least that was DRAM's conclusion. Our block was junk due to a crack at the bottom of the cylinder that went into the main bearing web. The Edelbrock heads were salvagable and now the RR has a nice 452 with a roller cam and plenty of spring pressure. Last edited by David_in_St_Croi; 10/26/10 05:29 PM. https://www.facebook.com/THENEWCDRA Proud member of the liberal scientific elite

Re: Done for the season... [Re: 440Jim] #837951 10/26/10 03:25 PM 10/26/10 03:25 PM
Joined: May 2007 Posts: 1,443 Maryland D Dads426 OP pro stock
Dads426 OP pro stock D Joined: May 2007 Posts: 1,443 Maryland	I don't think the MP 590 needs a lot of spring pressure, but what were the actual installed numbers? (130/330?). Check the spring to see if it is broke, and if not, the current pressures. Since it broke at the finish line, what was the max RPM? I'll have to look it up in the log when I get home. We had to shim the springs slightly to get the pressures up to spec. They were far from coil bind. I'll measure some when we get them off to see if they weakened. Ferrea wants the valve, spring, retainer and locks for analysis. Motor was shifted at 6000; through the traps at 6100. 2012 422 Allstars NSS Champion 2013 422 Allstars NSS Champion 2014 422 Allstars NSS Champion

Re: Done for the season... [Re: Dads426] #837952 10/26/10 07:08 PM 10/26/10 07:08 PM
Joined: Jan 2010 Posts: 311 Kingsville, Md grncpe enthusiast
grncpe enthusiast Joined: Jan 2010 Posts: 311 Kingsville, Md	Oh I forgot to mention.This must be a Maryland Mopar thing as Cindy Sharp in the Hustler Dart dropped a valve at Capitol last week @ the Jasper shootout...Real nasty broke a rod,cam,block,trans and everything else you can think of.... So it could be worse... My motor is out due to Cat rockers eating the shafts and sent metal through the whole motor.... Must be the Fall thing for the mopars anyway you may have seen her car before..Try to load a pic from Norwalk 6270176-60889_161366537206980_117386234938344_539523_2571636_n.jpg (60 downloads)

Re: Done for the season... [Re: grncpe] #837953 10/26/10 07:10 PM 10/26/10 07:10 PM
Joined: Feb 2004 Posts: 34,937 S.E. South Dakota ! bigdad Still Posting A Lot
bigdad Still Posting A Lot Joined: Feb 2004 Posts: 34,937 S.E. South Dakota !	Yuck, thats a sad sight to see .. Hope 2011 brings much better luck

Re: Done for the season... [Re: grncpe] #837954 10/26/10 08:32 PM 10/26/10 08:32 PM
Joined: Oct 2003 Posts: 842 Baltimore,MD Bill_LBSR super stock
Bill_LBSR super stock Joined: Oct 2003 Posts: 842 Baltimore,MD	Yeh saw the Hustler Dart at the Jasper shootout last week.......really good looking car LBSR

Re: Done for the season... [Re: grncpe] #837955 10/26/10 09:26 PM 10/26/10 09:26 PM
Joined: Jan 2003 Posts: 16,928 NC 440Jim I Live Here
440Jim I Live Here Joined: Jan 2003 Posts: 16,928 NC	Quote: Oh I forgot to mention.This must be a Maryland Mopar thing as Cindy Sharp in the Hustler Dart dropped a valve at Capitol last week @ the Jasper shootout... You guys are making me nervous. I am debating if I will do a teardown inspection/freshen this winter or run it another year. This motor has treated me very well and I don't want to lose any parts. I have at least two, maybe 3 more races I want to do this fall. 1993 Daytona, 5.50 at 130mph (1/8) 1.19 sixty ft (PG). Link to 572 B1 - Part 1

Re: Done for the season... [Re: Dads426] #837956 10/26/10 09:32 PM 10/26/10 09:32 PM
Joined: Jan 2003 Posts: 16,928 NC 440Jim I Live Here
440Jim I Live Here Joined: Jan 2003 Posts: 16,928 NC	Quote: Ferrea wants the valve, spring, retainer and locks for analysis. Motor was shifted at 6000; through the traps at 6100. It would take a really bad/broken spring at that low of rpm. My guess is harmonics or a bad fit on the retainer is what they are likely looking for. 1993 Daytona, 5.50 at 130mph (1/8) 1.19 sixty ft (PG). Link to 572 B1 - Part 1

Re: Done for the season... [Re: 440Jim] #837957 10/26/10 09:54 PM 10/26/10 09:54 PM
Joined: May 2007 Posts: 1,443 Maryland D Dads426 OP pro stock
Dads426 OP pro stock D Joined: May 2007 Posts: 1,443 Maryland	Pulled what's left of the exhaust stem, spring and intake valve & spring. Spring pressure is 125 closed (off 5 pounds from when it was installed). Open pressure is about 340 lbs (I didn't check open pressure when I assembled the heads). Both springs look fine, pressures are the same. Retainer fits well and I had spring cups to locate the springs (dual with no damper). These pressures are in line with what Mopar recommends, so I'm at a loss as to why it failed. I got an interesting email the the original mechanic on the car, Dave Reitz: "When we first went to fuel (Nitro) our machinist was big on bronze wall guides and we quickly found that they were too tight and seized." BTW, Nice Dart! 2012 422 Allstars NSS Champion 2013 422 Allstars NSS Champion 2014 422 Allstars NSS Champion

Re: Done for the season... [Re: Dads426] #837958 10/26/10 11:25 PM 10/26/10 11:25 PM
Joined: Feb 2006 Posts: 2,379 MD Kevins493 top fuel
Kevins493 top fuel Joined: Feb 2006 Posts: 2,379 MD	I took the head of the valve to school today and showed it to my mechanics of materials professor. He seems to think it was cracked.

Re: Done for the season... [Re: bigdad] #837959 10/27/10 10:22 AM 10/27/10 10:22 AM
Joined: Jan 2003 Posts: 24,562 Brookeville, Md Mr.Yuck Not enough dumb comments...yet
Mr.Yuck Not enough dumb comments...yet Joined: Jan 2003 Posts: 24,562 Brookeville, Md	Quote: Yuck, thats a sad sight to see .. Hope 2011 brings much better luck no doubt, ripped the wall too, pan was full of water. At least it didn't happen at 6k. It would have been a big mess to clean up.

Re: Done for the season... [Re: Mr.Yuck] #837960 10/27/10 03:29 PM 10/27/10 03:29 PM
Joined: May 2007 Posts: 1,443 Maryland D Dads426 OP pro stock
Dads426 OP pro stock D Joined: May 2007 Posts: 1,443 Maryland	Quote: no doubt, ripped the wall too, pan was full of water. At least it didn't happen at 6k. It would have been a big mess to clean up. That is why we have a diaper on the motor so Kevin won't have to wear one I'm leaning towards a stuck valve. When he was starting it that day the motor was spinning over like it had a low cylinder, maybe from a bent valve. Funny thing is, it ran its best ET the run before it let go. When we ran sprints we had a big problem with siezing exhaust valves in the alky motors. Ended up running them a little looser with no seals. 2012 422 Allstars NSS Champion 2013 422 Allstars NSS Champion 2014 422 Allstars NSS Champion

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