The Ford Barn

Dak Rat · 09-30-2019, 07:50 AM

I have an Isky 77B cam installed in my 276" 8BA. Specs call for .014 both Int. & Exh. HOT. Since its not possible to adjust the clearance HOT in a FH, what would be the correct clearance to use? I'm thinking about .016, what say the experts?

40 Deluxe · 09-30-2019, 09:15 AM

Surely Isky knows better than to specify a "HOT" clearance spec for a flathead! Maybe should call them for clarification.

Pete · 09-30-2019, 05:26 PM

It is .011 and .013 cold.

CORRECTION: The ones I do are set at the above specs.
I got my masters from an original Isky cam with the red steel seal on it, in the mid 50's.

It is important to follow the manufacturer's installation instructions.
Deviating could void the warranty.

Dak Rat · 09-30-2019, 07:15 PM

Well, cam card says .014. Have e-mailed Isky, we'll see if they can provide the clearance for cold setting.

RalphM · 09-30-2019, 08:44 PM

Pete,
Is that .011 exhaust and .013 Intake?
I would think the clearance on the exhaust needs to be more than the intake due to the valve getting hotter and expanding more?

Pete · 09-30-2019, 08:54 PM

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The intake is ALWAYS given FIRST.

It is etched in stone.

Dak Rat · 10-01-2019, 07:49 AM

Got the answer from Isky--there was a misprint on the card that came with the cam. Clearance is .014 both Int. and exh. This is the COLD setting for the 77B cam.

Russ/40 · 10-01-2019, 11:48 AM

I bought the 77B 25 years ago, had the misprint then.

09-30-2019, 07:50 AM	#1
Dak Rat Senior Member Join Date: May 2010 Location: Minot, ND Posts: 217	Valve clearance Hot/Cold I have an Isky 77B cam installed in my 276" 8BA. Specs call for .014 both Int. & Exh. HOT. Since its not possible to adjust the clearance HOT in a FH, what would be the correct clearance to use? I'm thinking about .016, what say the experts?

09-30-2019, 09:15 AM	#2
40 Deluxe Senior Member Join Date: May 2010 Location: now Kuna, Idaho Posts: 3,779	Re: Valve clearance Hot/Cold Surely Isky knows better than to specify a "HOT" clearance spec for a flathead! Maybe should call them for clarification.

09-30-2019, 05:26 PM	#3
Pete Senior Member Join Date: May 2010 Location: Wa. Posts: 5,408	Re: Valve clearance Hot/Cold It is .011 and .013 cold. CORRECTION: The ones I do are set at the above specs. I got my masters from an original Isky cam with the red steel seal on it, in the mid 50's. It is important to follow the manufacturer's installation instructions. Deviating could void the warranty. Last edited by Pete; 10-01-2019 at 07:34 PM.

09-30-2019, 07:15 PM	#4
Dak Rat Senior Member Join Date: May 2010 Location: Minot, ND Posts: 217	Re: Valve clearance Hot/Cold Well, cam card says .014. Have e-mailed Isky, we'll see if they can provide the clearance for cold setting.

09-30-2019, 08:44 PM	#5
RalphM Senior Member Join Date: Nov 2015 Location: North Pole, Alaska Posts: 2,651	Re: Valve clearance Hot/Cold Pete, Is that .011 exhaust and .013 Intake? I would think the clearance on the exhaust needs to be more than the intake due to the valve getting hotter and expanding more?

09-30-2019, 08:54 PM	#6
Pete Senior Member Join Date: May 2010 Location: Wa. Posts: 5,408	Re: Valve clearance Hot/Cold Sponsored Links (Register now to hide all advertisements) The intake is ALWAYS given FIRST. It is etched in stone.

10-01-2019, 07:49 AM	#7
Dak Rat Senior Member Join Date: May 2010 Location: Minot, ND Posts: 217	Re: Valve clearance Hot/Cold Got the answer from Isky--there was a misprint on the card that came with the cam. Clearance is .014 both Int. and exh. This is the COLD setting for the 77B cam.

10-01-2019, 11:48 AM	#8
Russ/40 Senior Member Join Date: May 2010 Location: Santee, California Posts: 3,505	Re: Valve clearance Hot/Cold I bought the 77B 25 years ago, had the misprint then.