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Would you run this for PV clearance
#2112931
07/18/16 11:54 PM
07/18/16 11:54 PM
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Joined: May 2005
Posts: 1,030
ohio
67mprfan
OP
super stock
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OP
super stock
Joined: May 2005
Posts: 1,030
ohio
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The red is the intake and the blue is the exhaust
71 demon stock stroke 440/indy ez-1 running 10.10 @ 132.14 mph in the 1/4 and 6.36 @ 107.46 mph in the 1/8 not in the same weekend but It did it then I sold it.
67 Belvedere that worked it's way in the 10's
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Re: Would you run this for PV clearance
[Re: justinp61]
#2112948
07/19/16 12:07 AM
07/19/16 12:07 AM
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Joined: May 2005
Posts: 1,030
ohio
67mprfan
OP
super stock
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OP
super stock
Joined: May 2005
Posts: 1,030
ohio
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I was never good at reading this type of caliper and I can always get great help on this site so I like to double check myself
71 demon stock stroke 440/indy ez-1 running 10.10 @ 132.14 mph in the 1/4 and 6.36 @ 107.46 mph in the 1/8 not in the same weekend but It did it then I sold it.
67 Belvedere that worked it's way in the 10's
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Re: Would you run this for PV clearance
[Re: 67mprfan]
#2112951
07/19/16 12:08 AM
07/19/16 12:08 AM
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Joined: Apr 2005
Posts: 1,505
TN
SCATPACK 1
pro stock
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pro stock
Joined: Apr 2005
Posts: 1,505
TN
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It looks like you are measuring in the wrong place. Measure the red clay at the thinnest point where the edge of the valve compresses the clay.
Old Geezer Racing
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Re: Would you run this for PV clearance
[Re: VernMotor]
#2112952
07/19/16 12:09 AM
07/19/16 12:09 AM
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Joined: May 2005
Posts: 1,030
ohio
67mprfan
OP
super stock
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OP
super stock
Joined: May 2005
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ohio
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Heck you could drive a truck though there !! I have always went by .100 exhaust and .080 intake Makes me wish I had a bigger cam now
71 demon stock stroke 440/indy ez-1 running 10.10 @ 132.14 mph in the 1/4 and 6.36 @ 107.46 mph in the 1/8 not in the same weekend but It did it then I sold it.
67 Belvedere that worked it's way in the 10's
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Re: Would you run this for PV clearance
[Re: 67mprfan]
#2113006
07/19/16 01:35 AM
07/19/16 01:35 AM
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Joined: Aug 2003
Posts: 43,269
Bend,OR USA
Cab_Burge
I Win
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I Win
Joined: Aug 2003
Posts: 43,269
Bend,OR USA
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I quit measuring V to P with a dial indicactor after .120 on both valves, that is plenty  Have you checked, degree, the cam yet? If not do that first and then recheck your valve to piston clearances and please let us know the differences,  If any are found 
Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
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Re: Would you run this for PV clearance
[Re: 67mprfan]
#2113057
07/19/16 07:04 AM
07/19/16 07:04 AM
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Joined: May 2005
Posts: 1,030
ohio
67mprfan
OP
super stock
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OP
super stock
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ohio
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Yes Cab this is after the cam was degreed
71 demon stock stroke 440/indy ez-1 running 10.10 @ 132.14 mph in the 1/4 and 6.36 @ 107.46 mph in the 1/8 not in the same weekend but It did it then I sold it.
67 Belvedere that worked it's way in the 10's
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Re: Would you run this for PV clearance
[Re: 67mprfan]
#2113063
07/19/16 08:28 AM
07/19/16 08:28 AM
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Joined: Dec 2006
Posts: 4,647
aotearoa
rebel
master
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master
Joined: Dec 2006
Posts: 4,647
aotearoa
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Or taller pistons
i measure my clearence on the piston, slicing into the clay if neccessary if i'm being extra vigilant.
Last edited by rebel; 07/19/16 08:53 AM.
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Re: Would you run this for PV clearance
[Re: SCATPACK 1]
#2113198
07/19/16 12:21 PM
07/19/16 12:21 PM
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Joined: Feb 2003
Posts: 1,942
Metro Detroit
OUTLAWD
top fuel
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top fuel
Joined: Feb 2003
Posts: 1,942
Metro Detroit
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It looks like you are measuring in the wrong place. Measure the red clay at the thinnest point where the edge of the valve compresses the clay.
Agreed, Unless I am seeing it wrong, shouldn't you be measuring here:
Faster, Faster until the thrill of speed overcomes the fear of death...
71 Swinger - slowly collecting dust/parts
66 Belv. II - just a streetcar
88 Mustang - turbo LS beater
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Re: Would you run this for PV clearance
[Re: SCATPACK 1]
#2113253
07/19/16 01:30 PM
07/19/16 01:30 PM
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Joined: Jun 2008
Posts: 3,916
usa
lewtot184
master
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master
Joined: Jun 2008
Posts: 3,916
usa
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It looks like you are measuring in the wrong place. Measure the red clay at the thinnest point where the edge of the valve compresses the clay.
this is what i was thinking.
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Re: Would you run this for PV clearance
[Re: 67mprfan]
#2113346
07/19/16 03:21 PM
07/19/16 03:21 PM
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Joined: Jan 2003
Posts: 14,513
So. Burlington, Vt.
fast68plymouth
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 14,513
So. Burlington, Vt.
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IMO, the clay method isn't accurate enough if the v/p clearance is questionably close.
Using a checking spring with an indicator on the retainer is really the only way to know what you really have.
The only thing I use the clay for is checking the radial clearance.
68 Satellite, 383 with stock 906’s, 3550lbs, 11.18@123
Dealer for Comp Cams/Indy Heads
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Re: Would you run this for PV clearance
[Re: Cab_Burge]
#2113626
07/19/16 10:08 PM
07/19/16 10:08 PM
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Joined: May 2005
Posts: 1,030
ohio
67mprfan
OP
super stock
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OP
super stock
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Posts: 1,030
ohio
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Well I thought I would double check myself today and this is before I cut it open to measure
71 demon stock stroke 440/indy ez-1 running 10.10 @ 132.14 mph in the 1/4 and 6.36 @ 107.46 mph in the 1/8 not in the same weekend but It did it then I sold it.
67 Belvedere that worked it's way in the 10's
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Re: Would you run this for PV clearance
[Re: Cab_Burge]
#2114000
07/20/16 01:11 PM
07/20/16 01:11 PM
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Joined: May 2005
Posts: 1,030
ohio
67mprfan
OP
super stock
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OP
super stock
Joined: May 2005
Posts: 1,030
ohio
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Wad that up so you can cut some 1/4 inch thick by 1/4 inch wide strips long enough to fit in both valve pockets on the pistons over towards the cylinder wall exhaust side and then rotate the motor through one complete valve cycle and use a dial caliper to measure the thickness of the clay on the pistons  I use the skinny part that you see coming out the bottom of the dial calipers when you spread them open next to the clay on the piston tops and push the calipers open say around .500 and the press the body of the caliper down until the base barely hits the clay and then look at that measuremnent Let us know what you find Okay I'll have to try again because I'm was getting frustrated with so much clearance to me it's like wasted power
71 demon stock stroke 440/indy ez-1 running 10.10 @ 132.14 mph in the 1/4 and 6.36 @ 107.46 mph in the 1/8 not in the same weekend but It did it then I sold it.
67 Belvedere that worked it's way in the 10's
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Re: Would you run this for PV clearance
[Re: 67mprfan]
#2114014
07/20/16 01:18 PM
07/20/16 01:18 PM
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Joined: May 2005
Posts: 1,030
ohio
67mprfan
OP
super stock
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OP
super stock
Joined: May 2005
Posts: 1,030
ohio
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Could there be anything from keeping the valves from opening all the way I just got the heads freshen up maybe springs are not right
71 demon stock stroke 440/indy ez-1 running 10.10 @ 132.14 mph in the 1/4 and 6.36 @ 107.46 mph in the 1/8 not in the same weekend but It did it then I sold it.
67 Belvedere that worked it's way in the 10's
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