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Valve Lash Settings


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#1 kfitts

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Posted 18 September 2005 - 10:32 AM

O.K. Guys,

   I have installed Tim's Screamin’Banshee Cam.

I need to set the valve lash. Does anyone know what is the correct settings? (Hot & Cold)

Thanks
Kevin

88 Quest, FIP MPI, ED-IS-ON, T62, O Ring Wisco Block, Tial WG/BOV, Tim Cam, KDM 3" SX Fuel System





#2 jr_ss

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Posted 18 September 2005 - 01:48 PM

On a cold engine it should be .007in. Now that's on a stock cam so I'm not sure if it should be any different for the Screamin Banshee. I suggest contacting Tim and seeing if he has any recommendations, as it is his cam... But I would think the .007in is just fine...
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#3 kfitts

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Posted 18 September 2005 - 05:12 PM

Thanks jr_ss,

   I PM Tim,

    Just need to set them cold until I get it running. Then I can set them hot.
    It still will be awhile before I get it going. Waiting on my turbo and header. Also the Hurricane setup.

   Should run nice once its tuned.

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#4 Dcrasta

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Posted 19 September 2005 - 10:20 AM

Sure is a purdy car man smile.gif
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#5 kfitts

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Posted 19 September 2005 - 10:39 AM

Can't wait to get it painted.

Need to make sure it runs right first :wink:

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#6 Boosted_One

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Posted 19 September 2005 - 04:23 PM

Run .010 and .010 COLD
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#7 kfitts

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Posted 23 September 2005 - 10:10 AM

I got a reply from Tim,


Tim_C.
QUOTE
.006 intake
.008 exhaust

Typically, you always want to go .001-.002 tighter than factory spec on any mech cam install. With the exceptions being only a very large lift race cam. That can require .001-.002 looser than factory, with a bit more noise at idle.


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#8 Boosted_One

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Posted 23 September 2005 - 03:51 PM

QUOTE (kfitts)
I got a reply from Tim,


Tim_C.
QUOTE

.006 intake
.008 exhaust

Typically, you always want to go .001-.002 tighter than factory spec on any mech cam install. With the exceptions being only a very large lift race cam. That can require .001-.002 looser than factory, with a bit more noise at idle.


I run tims cam...


.010 and .010 run very well.
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#9 Sonypete

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Posted 26 September 2005 - 11:14 PM

I found something funny when doing my valve lash... well only when I just crank the engine over a bit to get the lobes 180 degrees from the rocker arms instead of setting TDC or BDC. But when the lobe on the cam gets almost 90 degrees from the rocker arm it measures allot looser then when the lobe on the cam is 180 degrees, facing away from the rocker arm.

Why is that??

Ohhh yea just to make sure when you adjust the valve lash you want the lobe pointing 180 degrees away from the rocker arm right??

#10 kfitts

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Posted 27 September 2005 - 06:45 AM

Thanks guys for the info.

BTW:
FIP likes .008 & .008 Hot

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#11 ALANFROMPDX

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Posted 27 September 2005 - 12:28 PM

I agree with Tim.
.006 intake
.008 exhaust

But there are always guys that can run something other than recommended that works.

You will be better served contacting Tim and working with him to dial this cam in.

My cams are regrinds and as far as I know his are not.
It is always best to work with the cam provider just incase something isn't right with the cam.
Some like 8/8 some 6/8 and some 10/10 but you gotta start with what is recommended.

#12 kfitts

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Posted 28 September 2005 - 08:12 AM

Your right!

Thanks

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#13 Sonypete

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Posted 28 September 2005 - 03:19 PM

QUOTE
I found something funny when doing my valve lash... well only when I just crank the engine over a bit to get the lobes 180 degrees from the rocker arms instead of setting TDC or BDC. But when the lobe on the cam gets almost 90 degrees from the rocker arm it measures allot looser then when the lobe on the cam is 180 degrees, facing away from the rocker arm.

Why is that??

Ohhh yea just to make sure when you adjust the valve lash you want the lobe pointing 180 degrees away from the rocker arm right??



No reponses  :roll:  without checking for TDC or BDC cna I just point the cam lobes away from rocker arm and be okay adjusting them at that point farthest from the lobe??

#14 Dcrasta

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Posted 28 September 2005 - 04:30 PM

Follow the firing order at TDC on compression both valves are as closed as they are gonna be.
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#15 Sonypete

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Posted 28 September 2005 - 05:10 PM

Hmm well the thing is I have no tools where I am at to turn the engine over manually while looking at it. I unplug the distributor and just tap the key to crnak it over till the lob of the cam is farthest away from the rocker arm.

Is this an okay method?? Just want to make sure thats the lobe to rocker position it needs to be at for valve lash adjusting. smile.gif

#16 Boosted_One

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Posted 28 September 2005 - 05:42 PM

You go TDC#1 and then TDC#4 to set the valves. So get your marker lined up on the crank pulley at "0" then rotate the pulley clockwise again till you get to "0" again on the crank pulley.

One rotation at "0" is TDC#1 and the other rotation at 360* is TDC#4


There's a diagram I use in a Haynes manual as to the sequence.

Laymans way feel the rockers with no tension on them @ the respective TDC cycle. Those ones with out tension on them are the ones you set.

Obviously remember the intakes are on 1 side and the exhaust on another when you set the clearance. wink.gif
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#17 Sonypete

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Posted 28 September 2005 - 08:25 PM

QUOTE
You go TDC#1 and then TDC#4 to set the valves.

Okay I'll remeber that for next time I have to set my valve lash.

For the meantime so I can feel safe about my recent valve lash adjustings, when your at TDC and adjusting the rocker arm does the cam lobe face directly opposite of the rocker arm??

#18 Sonypete

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Posted 28 September 2005 - 08:26 PM

QUOTE
You go TDC#1 and then TDC#4 to set the valves.

Okay I'll remeber that for next time I have to set my valve lash.

For the meantime so I can feel safe about my recent valve lash adjustings, when your at TDC and adjusting the rocker arm does the cam lobe face directly opposite of the rocker arm??

#19 Boosted_One

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Posted 29 September 2005 - 06:31 AM

you want freeplay off the cam lobe to set lash.

Which way it faces I can't tell you off hand.

I am almost tempted to scan that nice diagram I have... smile.gif
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#20 jr_ss

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Posted 29 September 2005 - 09:03 AM

As long as you have free play to adjust the lash setting yuo should be alright. I just used common sense and made sure the valves I adjusted had no tension on them at all. My "tapping" quieted right down after I was through. Now I just want to get rid of the mech. altogether and go full hydra/roller....
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