entropy
Moderator
Posts: 8671
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posted June 13, 2006 08:27 AM
quote:
Hi entropy , wat do u need the extra set of cams for ? building another motor ?? heehee
yep; and this time "doing it right" 
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NOS1290
Expert Class
Posts: 103
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posted June 13, 2006 12:16 PM
I'm sure you checked the cams carefully, but you need to put them in v-blocks and check for runout. They can only live with about .002 to .005 runout along the length before they start to bind up in the bearing saddle.
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osti33
Needs a job
Posts: 2973
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posted June 13, 2006 02:52 PM
quote:
Are you thinking about 86mm JE's, because I hear Entropy has an in with Noonan.
I do believe he got his custom thick top fatty slugs in just two weeks.
No. I think I am going to go with some 85mm JE's this time around.
Entropy knows/has an in with everyone!!
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osti33
Needs a job
Posts: 2973
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posted June 13, 2006 02:54 PM
quote:
I'm sure you checked the cams carefully, but you need to put them in v-blocks and check for runout. They can only live with about .002 to .005 runout along the length before they start to bind up in the bearing saddle.
Yep. I lucked out. Cams are fine.
Thanks for the heads up on the runout.
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Y2KZX12R
Needs a job
CompetitionCNC.com
Posts: 3762
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posted June 14, 2006 07:00 AM
Got your email..... Wow, not good. so what did the keeper grooves look like in the valves. also what did the keepers look like? (If you found them yet)
I would say so far it looks like over heated exhaust valves (depends if both exhaust valves show same signs of overheating. But less likely it could be a keeper failure, assuming the springs were still closing the valves and the valves wernt floating. But you will likely see signs of keeper failure on one, but not both, exhaust valves.
Whats the difference in seat and open pressures from muzzy springs and stock?
A seat could have come loose. Thats a tough one to tell because the seats popout quite often when this kind of damage starts to happen.
What "tuning" were you doing at the time? Detonation is all but impossable to hear on these engines when your wearing a helmet and at the end of the 1/4 mile.
Look very closely at the bottom of the damaged piston and compare it to the others. look for temperature trouble. If it was detonation then the others may (should) show some signs of it.
You wernt spraying it at the time of failure, were you?
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Y2KZX12R
CompetitionCNC.com
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harryzx-12
Needs a job
Posts: 3643
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posted June 14, 2006 09:43 AM
That's UGLY! Hope you get it sorted soon!
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"Life should NOT be a journey to the grave with the intention of arriving safely in an attractive and well preserved body, but rather to skid in sideways- Body thoroughly used up, totally worn out...Screaming "WOO HOO, What a Ride !!!"
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osti33
Needs a job
Posts: 2973
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posted June 14, 2006 03:00 PM
Y2K,
Keepers looked fine. I did find them all. Haven't checked the keeper groves on the valves yet. It is on my list of things to do. So far I have only been able to get one valve stem out of the head.
As far as spring pressure goes I think the Muzzy ones have almost twice as much seat pressure as the stockers. I did check them when I put them in but that was quite a while ago. I can't really remember for sure.
I'm pretty sure it wasn't detonation. All the other pistons look fine.
No spray. This motor has never been sprayed since I rebuilt it.
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rac4it
Needs a job
Bergie
Posts: 3009
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posted June 15, 2006 06:24 AM
who built it?
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Y2KZX12R
Needs a job
CompetitionCNC.com
Posts: 3762
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posted June 15, 2006 07:14 AM
Osti, find those valve ends, they will tell you alot. Its sounding more and more like a seat came loose.
Take some pics of the bottom of the pistons if you can. It would be nice to compare all 4 for heat.
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Y2KZX12R
CompetitionCNC.com
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osti33
Needs a job
Posts: 2973
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posted June 15, 2006 08:15 AM
 Edited By: osti33 on 15 Jun 2006 09:20
quote:
who built it?
I did.
Muzzy 1375 kit with a Carpenter head.
Same motor I was running at MIR at last years grudge race.
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osti33
Needs a job
Posts: 2973
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posted June 15, 2006 08:19 AM
quote:
Osti, find those valve ends, they will tell you alot. Its sounding more and more like a seat came loose.
Take some pics of the bottom of the pistons if you can. It would be nice to compare all 4 for heat.
I will check those keeper grooves. I will also take some pics of the piston bottoms and post them up.
I plan to split the cases this saturday or sunday. I will post pics then.
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dougmeyer
Needs a job
moderated
Posts: 2713
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posted June 15, 2006 07:35 PM
That's about the ugliest top end blowup I've ever seen. You sure you got the clutch in right away? Looks like you drove it all the way home...... !
I think, either a valve head came off or a seat fell out.
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osti33
Needs a job
Posts: 2973
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posted June 15, 2006 07:51 PM
Edited By: osti33 on 15 Jun 2006 21:21
Dr. Doug, I was hoping you would take a look at this thread.
I got the clutch pulled in as soon as I realized something was wrong. It may not have been right when things started going wrong but I would say pretty quick.
"Looks like you drove it all the way home." LMAO!! That is hilarious! Thanks Doug I needed a good laugh.
My first thought was also a valve seat. Didn't even think about the valve coming apart.
Maybe I'll find out more when I split the cases this weekend.
Thanks for adding your opinion Doug. Also thanks to everyone else who has helped me out with this. The membership here is great! 
Ryan
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blubyu
Expert Class
Posts: 209
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posted June 16, 2006 12:30 PM
Tagged Valve
Sorry to hear about the motor Osti...Damn...I was waiting for you to sell me that carpenter head too!!
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jaws12r
Novice Class
Posts: 45
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posted June 18, 2006 02:12 AM
quote:
Dr. Doug, I was hoping you would take a look at this thread.
I got the clutch pulled in as soon as I realized something was wrong. It may not have been right when things started going wrong but I would say pretty quick.
"Looks like you drove it all the way home." LMAO!! That is hilarious! Thanks Doug I needed a good laugh.
My first thought was also a valve seat. Didn't even think about the valve coming apart.
Maybe I'll find out more when I split the cases this weekend.
Thanks for adding your opinion Doug. Also thanks to everyone else who has helped me out with this. The membership here is great!
Ryan
Wats the verdict Osti ?? Do u think its the keepers ?? were they OEM or ......???
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osti33
Needs a job
Posts: 2973
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posted June 18, 2006 06:09 PM
Jaws,
I split the cases today. The wife unit has the camera and she is in Denver. I will post pics when she gets back. I think she gets home Wednesday.
I don't think it was the keepers and yes they were stock keepers. I agree with Doug. I think a seat came out or a head of a valve let go.
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entropy
Moderator
Posts: 8671
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posted June 19, 2006 03:41 AM
Ry,
how does the crank look??
cases: are the crank thrust surfaces OK??
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osti33
Needs a job
Posts: 2973
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posted June 19, 2006 10:09 AM
quote:
Ry,
how does the crank look??
cases: are the crank thrust surfaces OK??
Crank looks good. I was very happy about that. I think I am going to send to our buddy Dave and have him check it out anyways.
Cases also look good.
How is things at your place? I heard Houston has had a lot of flooding.
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TRNorBRN6001
Needs a job
Posts: 2021
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posted June 19, 2006 12:25 PM
Yeah, I heard about that. Hope all is well. Mo City / Sugarland area never realy seemed
to have flooding problems, but that might have changed.
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TFA 200MPH CLUB MEMBER!
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countersteer
Needs a job
Didn't read the owners manual
Posts: 2207
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posted June 19, 2006 12:33 PM
quote:
quote:
who built it?
I did.
Muzzy 1375 kit with a Carpenter head.
Same motor I was running at MIR at last years grudge race.
holy shit man
i have nightmares about that sort of thing... *knock on wood*
good luck with everything- sucks to happen this early in summer
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Scott
Long Island, New York
2006 ZX-14, 2003 ZX-12R
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Wideout
Expert Class
Posts: 300
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posted June 20, 2006 02:05 PM
quote:
How is things at your place? I heard Houston has had a lot of flooding.
We're fine out here in Mo City. Downtown Houston was pretty bad yesterday though. Today has been moderate to light. No ridin' til Thursday...
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osti33
Needs a job
Posts: 2973
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posted June 20, 2006 04:37 PM
quote:
quote:
How is things at your place? I heard Houston has had a lot of flooding.
We're fine out here in Mo City. Downtown Houston was pretty bad yesterday though. Today has been moderate to light. No ridin' til Thursday...
Glad you are keeping dry. 
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osti33
Needs a job
Posts: 2973
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posted June 20, 2006 04:39 PM
quote:
Are you thinking about 86mm JE's, because I hear Entropy has an in with Noonan.
I do believe he got his custom thick top fatty slugs in just two weeks.
TRNorBRN,
I just re-read this. Yes, I am going for the 86mm JE's. Not the 85's that I stated earlier. DUH!! Sorry about that.
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