Re: Change in valve lash and performance
[Re: 69CHARGERMD]
#2169972
10/07/16 11:14 PM
10/07/16 11:14 PM
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Joined: Sep 2015
Posts: 1,096 Australia
ozymaxwedge
super stock
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super stock
Joined: Sep 2015
Posts: 1,096
Australia
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Too many variables. Who knows it may go slower or faster but more than likely there will not be any difference.
1963 Plymouth Max Wedge 1971 Barracuda
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Re: Change in valve lash and performance
[Re: 69CHARGERMD]
#2170125
10/08/16 09:23 AM
10/08/16 09:23 AM
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Joined: Jan 2003
Posts: 8,030 Tulsa OK
Bad340fish
master
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master
Joined: Jan 2003
Posts: 8,030
Tulsa OK
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Be careful it might slow down!
68 Barracuda Formula S 340
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Re: Change in valve lash and performance
[Re: 69CHARGERMD]
#2170127
10/08/16 09:42 AM
10/08/16 09:42 AM
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Joined: Jan 2003
Posts: 4,852 KENTUCKY
69CHARGERMD
OP
master
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OP
master
Joined: Jan 2003
Posts: 4,852
KENTUCKY
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Thanks guys. The correct lash was .020 and unbeknownst to be I had it set at .025. I will see what it does at the "correct" setting for now. Didn't want any uncessary wear if the lash was too loose. Will see if it picks up or slows down. Thanks guys. Case of beer to Prosport if it picks up a 1/2 second. Lol. Thanks Bob.
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Re: Change in valve lash and performance
[Re: 69CHARGERMD]
#2170134
10/08/16 10:23 AM
10/08/16 10:23 AM
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Joined: Jan 2003
Posts: 8,030 Tulsa OK
Bad340fish
master
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master
Joined: Jan 2003
Posts: 8,030
Tulsa OK
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If it slows down 1/2 second Prosport has to send you a case of beer lol.
Good luck!
68 Barracuda Formula S 340
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Re: Change in valve lash and performance
[Re: 69CHARGERMD]
#2170497
10/08/16 07:17 PM
10/08/16 07:17 PM
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Joined: Jan 2003
Posts: 4,852 KENTUCKY
69CHARGERMD
OP
master
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OP
master
Joined: Jan 2003
Posts: 4,852
KENTUCKY
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Car picked up all around. Was running 6.42s last week similar air. 6.39 off the trailer. 6.40 second run. 60' seems a bit better. ππ
Last edited by 69CHARGERMD; 10/08/16 07:18 PM.
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Re: Change in valve lash and performance
[Re: Cab_Burge]
#2170533
10/08/16 08:41 PM
10/08/16 08:41 PM
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Joined: Dec 2004
Posts: 10,555 Rittman Ohio
fourgearsavoy
I Live Here
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I Live Here
Joined: Dec 2004
Posts: 10,555
Rittman Ohio
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I still don't understand why cam grinders specify such wide lash specs. I set mine at .012 so it's nice and quiet and it doesn't beat up the rockers and valves. Gus
64 Plymouth Savoy 493 Indy EZ's by Nick at Compu-Flow 5-Speed Richmond faceplate Liberty box Dana 60
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Re: Change in valve lash and performance
[Re: fourgearsavoy]
#2170583
10/08/16 09:56 PM
10/08/16 09:56 PM
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Joined: Jan 2005
Posts: 4,243 Charlotte, North Carolina
sgcuda
master
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master
Joined: Jan 2005
Posts: 4,243
Charlotte, North Carolina
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I still don't understand why cam grinders specify such wide lash specs. I set mine at .012 so it's nice and quiet and it doesn't beat up the rockers and valves. Gus I have seen lash go away when the engine cools down and hang the valves open when too tight. Not a lot, just enough to not allow the engine to start.
[image][/image]
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Re: Change in valve lash and performance
[Re: 69CHARGERMD]
#2170625
10/08/16 11:16 PM
10/08/16 11:16 PM
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Joined: Sep 2015
Posts: 1,096 Australia
ozymaxwedge
super stock
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super stock
Joined: Sep 2015
Posts: 1,096
Australia
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Well there you go,,, maybe I should put a little more time into my lash.
How do you guys go setting lash HOT ? Are you getting the temp right up, pulling plugs, covers, finding TDC firing and then starting the process ? I have always followed the Mopar chart, tdc set 1in 8out rotate 90deg ect. Buy the time you do all this it is half cold ???????
1963 Plymouth Max Wedge 1971 Barracuda
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Re: Change in valve lash and performance
[Re: 69CHARGERMD]
#2170671
10/09/16 12:05 AM
10/09/16 12:05 AM
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Joined: Sep 2015
Posts: 1,096 Australia
ozymaxwedge
super stock
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super stock
Joined: Sep 2015
Posts: 1,096
Australia
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Thanks Greg and old_racer .
1963 Plymouth Max Wedge 1971 Barracuda
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Re: Change in valve lash and performance
[Re: lockjaw-express]
#2170677
10/09/16 12:14 AM
10/09/16 12:14 AM
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Joined: Sep 2014
Posts: 4,457 Washington
madscientist
master
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master
Joined: Sep 2014
Posts: 4,457
Washington
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Greg All,
what would you set cold at with Aluminum block and Aluminum heads with a roller cam?
Mark Set it .010-.012 cold and check it hot. If it's still loose, tighten the cold lash to make up the difference. I've set some all aluminum stuff as tight as .004 cold.
Last edited by madscientist; 10/09/16 12:14 AM.
Just because you think it won't make it true. Horsepower is KING. To dispute this is stupid. C. Alston
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Re: Change in valve lash and performance
[Re: lockjaw-express]
#2170680
10/09/16 12:17 AM
10/09/16 12:17 AM
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Joined: Apr 2008
Posts: 373 sandwich IL
sublimehemi
enthusiast
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enthusiast
Joined: Apr 2008
Posts: 373
sandwich IL
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Mine grows .017 edelbrock hemi heads and world block so if lash Is .024 I set .007...some people here set at zero lash as it will get to .017 hot...be carful as to always warm up before you rev.
70 charger ,all aluminum 528 hemi 727 cope rmvb,680hp 670 tq,full sequential holley hp efi,full hotchkis tvs,qa1 k and lowers,borgeson steering box cass viper 11.75 with cass s-trac dana 3.54
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