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347 burning oil HELP!

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Old 07-01-2009, 10:53 PM
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agentsmith5150
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Default 347 burning oil HELP!

ok, so on startup i get a bit of blue smoke but not much. but when i rev it i get quite a bit.

http://www.youtube.com/watch?v=PgFHiLKmz70

the specs are
342 Eagle Stroker Kit,
30lb injectors
Doug Herbert Solid Roller Cam .624/.640,
AFR 205 Heads

when i went through the motor i replaced the piston rings, but never had the heads cleaned up. im guessing its the valve seals...

i ran a compression test and had 192-195 compression in all cylinders this has me scratching my head..the car is custom tuned..had it for a day or two..romped on it...pulled good..then started running funny..had loss of power (had a SHUDDERING feel to the motor under load worse at 2000rpm) there isnt any oil on any of the plugs. they all have a nice tanish color to them. and it takes some effort to start sometimes.
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Old 07-01-2009, 11:03 PM
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mjr46
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what did it dyno at??......as for the oil burn, depending on what springs are used it is often necessary to switch to a proper diameter valve seal ,with my custom cam and new springs came specific instructions to swap out the current valve seals that were on my afr heads to the viton ones supplied with my upgrade kit
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Old 07-02-2009, 11:13 AM
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agentsmith5150
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hmm.....i had no idea lol..off to the shop the heads go...ps. it made 498hp@ 6800rpm and 518tq@ 3300rpm it was on a dynojet tho...drivability was AWESOME after the custom tune...but now im afraid to drive it rofl. oh well..might as well get the heads cleaned up the right way.
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Old 07-02-2009, 11:15 AM
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this was with 108octane 50/50 with 91 btw.

on straight pump it made 443hp at 6800rpm and 451tq @ 3300rpm
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Old 07-02-2009, 10:50 PM
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tinman
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I'm also thinking that the valve seals have died.
Many times with a cam this high in lift, you need to shorten the valve guide in order to keep the valve seals ok...
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Old 07-02-2009, 10:59 PM
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mjr46
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Originally Posted by agentsmith5150
this was with 108octane 50/50 with 91 btw.

on straight pump it made 443hp at 6800rpm and 451tq @ 3300rpm
good deal, sounds good
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Old 07-03-2009, 04:00 PM
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agentsmith5150
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thanks for the help guys..heads are being pulled this weekend, and hopefully it'll be on the road soon
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Old 07-03-2009, 06:40 PM
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AdderMk2
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shouldnt have to pull the heads to do valve seals
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Old 07-03-2009, 08:41 PM
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mjr46
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rope trick or cylinders full of air and a valve spring tool and a few hours and all should be done
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Old 07-03-2009, 10:57 PM
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He'll be pulling heads if there isn't enough clearance between retainers and valve guides anyway.
I didn't post it yesterday but he should have .050 clearance there as a mininum.........
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