: Blown out converter, update...



willsctsv
05-25-05, 02:35 PM
Billy Boat has my header with the high flow cat that I some how blew out.:banghead:
There replacing it and said it got too hot, and that's why it blew.

Isn't the converter made to withstand extreme temps?
My engine has no mods, how can this happen? And only to one side. The passenger side is fine.:hmm:

When taking off the header I had to remove the spark plugs and they look perfect!:hmm:
No signs of detonation, nothing worn or burnt looking. Weird..
Well, I'll get a tune and make sure the A/F ratios are on point.
Hopefully this is just a freak and isolated incident.

wildwhl
05-25-05, 02:40 PM
will-

I would guess that your exhaust mods, and intake mods? have leaned things out a bit. Normally, the STFT and LTFT's in the PCM can take care of minor variations, but you're likely outside of that range.

Good news is a custom tune will give you some missing HP :) not to mention improved reliability.

StealthV might be able to give you more information on this.

Good luck.

WW

CVP33
05-25-05, 09:13 PM
I received my BB Headers today. All I can say is they are AS ADVERTISED! Perfect workmanship, truly works of art. I dry humped the left one for roughly 10 minutes. Wife caught me so I played it off like I was buffing it.

Now about that Stealth V custom tune. BB exhaust with X-pipe, Headers, Lingenfelter CAI with homemade MAF to TB pipe. Now that's the ticket!

thebigjimsho
05-25-05, 09:33 PM
Now you know how wrapping headers CAN hurt your cats. Wrapping is fine for headers with no cats, but you're messing with heat dissipation and that can be a problem. Did you mention to B&B that you wrapped your headers? I'm guessing they'd frown upon it.

StealthV
05-25-05, 09:44 PM
Interesting hypothesis: header wrap = melted cat

Will, did you purchase your car new? The stock tune, even with the mods you have, is all about thermal management to prevent things like melted cats.

Have you cleaned your MAF of possible K&N oil contamination?


Now about that Stealth V custom tune. BB exhaust with X-pipe, Headers, Lingenfelter CAI with homemade MAF to TB pipe. Now that's the ticket!
Urby gained 19.5 HP on the dyno today with a Stealth tune and I purposely left a bunch on the table in his tune. Patience young Skywalker; your power awaits. :)

CVP33
05-25-05, 09:47 PM
Urby gained 19.5 HP on the dyno today with a Stealth tune and I purposely left a bunch on the table in his tune. Patience young Skywalker; your power awaits. :)

StealthV, we've talked about this. You know I like to be called padawan. Damnit man don't make me air this crap out in public.

StealthV
05-25-05, 09:57 PM
My sincerest apologies. :worship: Padawan

http://hunterwalthour.com/imImages/padawan(1)-361px-Aug-22-2004-11-54-13.jpg

lawfive
05-25-05, 10:08 PM
I received my BB Headers today. All I can say is they are AS ADVERTISED! Perfect workmanship, truly works of art. I dry humped the left one for roughly 10 minutes.

You gotta dry hump the right one for 10 minutes, too. Otherwise they'll be out of balance and you'll run lean on one side, rich on the other.

Best to do it before the install.

CVP33
05-25-05, 10:24 PM
You gotta dry hump the right one for 10 minutes, too. Otherwise they'll be out of balance and you'll run lean on one side, rich on the other.

Best to do it before the install.

Just finished. Man are my arms tired. :histeric:

willsctsv
05-25-05, 10:47 PM
Alright you hijackers, we turned my thread into porn!
Well, I sent the header to them in wrapped formation. Dennis did not mention anything about the wrap being a problem, and apparently Billy took a look at the header also.
Maybe they were inspecting for evidence of Nitrous, like over juicing or something..

Keep in mind some people have there headers coated that give the same effect as wrapping. I still never heard of this, and I'm sure Billy did not either, that is why I sent the header to them like that. Like I said, no mention from B&B about the wrap.

Also, the cat's are made to withstand extreme temps. Wrapping or not the heat that travels out of the head has got to be blow torch hot. The cat had to be faulty.
I need to hump it when i get it back, that may help...
Stealth the car was purchased new, 45 miles.

Stealth, I'm gonna need that tune, Are you testing out different configurations on a car with my mods?

StealthV
05-25-05, 11:16 PM
Tune in June shall you have. (I'm not the Yoda-speak master like CVP33)

TheHylandr
05-25-05, 11:32 PM
(I'm not the Yoda-spank master like CVP33)

:histeric: :rofl:

urbanski
05-26-05, 09:21 AM
seriously....i don't know why you need to wrap stainless headers
i have NO heat issues, in fact with my FFV intake my intake air temps are AMBIENT, and I have EFILive logs to prove that. Yesterday on the dyno my IAT was max 100F.
Stainless headers don't need jack, that's why you pay extra.

ssmith100
05-26-05, 09:31 AM
Hey Urb,

Hopefully Rick can set us up with about the same tune since we are both in Texas and will have close to the same mods. It's going to be a little while for me though. This new house is killing me. The wife has gone crazy !!!!!!!!!!!!!!!!!!!!!! May have to get a second job stocking at Walmart at night:D

Shane

urbanski
05-26-05, 09:34 AM
tell me about wives and new houses dude LOL

Dooman
05-26-05, 10:22 AM
Ha! You nailed it there! I work 2 jobs to "get away" from the whole crazy house of mine. "We need the money" I tell her... For my new car maybe...

thebigjimsho
05-26-05, 12:56 PM
Alright you hijackers, we turned my thread into porn!
Well, I sent the header to them in wrapped formation. Dennis did not mention anything about the wrap being a problem, and apparently Billy took a look at the header also.
Maybe they were inspecting for evidence of Nitrous, like over juicing or something..

Keep in mind some people have there headers coated that give the same effect as wrapping. I still never heard of this, and I'm sure Billy did not either, that is why I sent the header to them like that. Like I said, no mention from B&B about the wrap.

Also, the cat's are made to withstand extreme temps. Wrapping or not the heat that travels out of the head has got to be blow torch hot. The cat had to be faulty.
I need to hump it when i get it back, that may help...
Stealth the car was purchased new, 45 miles.

Stealth, I'm gonna need that tune, Are you testing out different configurations on a car with my mods?Well, I'm not making up the problems presented by wrapped headers. I didn't have much time but I did find this site.

http://www.sandersonheaders.com/main.php?p=troubleshooting&l=techmenu

willsctsv
05-26-05, 03:27 PM
Jim thanks for that link, interesting reading.:thumbsup:

I just spoke to Mike at B&B, and asked his opinion on this. He believes the lean condition in the engine for extended periods of time(like a track day) caused the cat to fail. He doesn't believe the wrap made the difference. He said the cats are made to withstand 1400 degrees.
IMO, I believe anyone adding headers to there V should get a tune before driving the car at WOT for 20-30 minutes straight.:eek:
I will install the header this weekend and get a Dyno tune from Carteck in NJ next week sometime. I'll post the before and After #'s with a/f ratios and other helpful info.. Also considering a Cam!:sneaky:
Thanks again for the research Jim!:thumbsup:

sefa01
05-26-05, 03:46 PM
Jim thanks for that link, interesting reading.:thumbsup:

I just spoke to Mike at B&B, and asked his opinion on this. He believes the lean condition in the engine for extended periods of time(like a track day) caused the cat to fail. He doesn't believe the wrap made the difference. He said the cats are made to withstand 1400 degrees.
IMO, I believe anyone adding headers to there V should get a tune before driving the car at WOT for 20-30 minutes straight.:eek:
I will install the header this weekend and get a Dyno tune from Carteck in NJ next week sometime. I'll post the before and After #'s with a/f ratios and other helpful info.. Also considering a Cam!:sneaky:
Thanks again for the research Jim!:thumbsup:Will:

The tune may be the key. As you know, I've put more than 10 track days on the V with headers and high-flo cats (from TPIS, which were the only ones with headers a year ago) and have had no problems. True, mine aren't wrapped. But it may be the tune I got from Cartek, who put the headers, cats, and B&B exhaust on at the same time.

BTW, are you set for the PDE day at Pocono June 17? If you thought your temperatures were high at The Glen, think what they'll be when you're going 15-20 mph on a much longer backstretch at Pocono.

willsctsv
05-26-05, 06:14 PM
Hey Steve,
I'm set up for Poconos on the 17th, New tires are on the Horizon( GSD3's or Dunlops), Dyno Tune, and some Hawk Pads. Also a simple custom ram air set up for that long staright :sneaky: .
What were your Dyno #'s?

My tires were at 29PSI cold and were going up to 45-50 after the 20 min. run. I would of never believed the tires could increase in pressure so much. The temps both days hit 80. If its going to be a hot one on the 17th I wonder what those tires are gonna hit?:eek:

GNSCOTT
05-26-05, 07:03 PM
Isn't this the 2nd car this has happened to? I remember seeing pictures of one blown out after he had a very sub par day at the track.

willsctsv
05-26-05, 09:24 PM
I had the pic's of the blown cat after the track day. I'm rebuilding now. Someone else posted the same thing happened to them with the stock cats, but the guy never posted anything about it again.

I believe running a bit lean around town or a 1/4 mile sprint won't blow a cat.
But, pushing the car to 5k or 6k rpm for 20 minutes on a track can over heat the material in the cat and cause it to fall apart.
TUNE, Tune, Tune, after the headers are installed, especially if you are going to push the car on a track. In real world driving you could never simulate what we put the cars through on a track, so if i didn't track the car i believe this would of never happened.