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Old 11-13-2023, 03:04 PM   #1
Jeep09
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Default Motor City Flathead - Mark Kirby Camshaft Specs

Does anybody have experience with these cams, cant find out much on specs. Wondering about the MCF 3/4 & full race.
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Old 11-13-2023, 03:42 PM   #2
petehoovie
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Default Re: Motor City Flathead - Mark Kirby Camshaft Specs

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Does anybody have experience with these cams, cant find out much on specs. Wondering about the MCF 3/4 & full race.
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Old 11-13-2023, 03:44 PM   #3
mercman from oz
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Default Re: Motor City Flathead - Mark Kirby Camshaft Specs



Fancy looking Head from Motor City Flathead V8
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Old 11-13-2023, 05:10 PM   #4
joel
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Default Re: Motor City Flathead - Mark Kirby Camshaft Specs

Try Shadow Rods in Saginaw Mi. phone 989 754 1928
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Old 11-13-2023, 10:00 PM   #5
flatjack9
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Default Re: Motor City Flathead - Mark Kirby Camshaft Specs

3/4 intake 29 -72, exhaust 72-29, lift .370, duration 282. Full: intake 28-73, exhaust 73-29, lift .420, duration 282

Last edited by flatjack9; 11-16-2023 at 10:11 PM.
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Old 11-14-2023, 09:22 AM   #6
sidevalve8ba
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Default Re: Motor City Flathead - Mark Kirby Camshaft Specs

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Valve lash on the 3/4 grind is .012 in intake and .014 on exhaust.

I have been running the 3/4 grind in a 276" 8BA for years now. Nice lopey idle, pulls well throught the gears. I'm happy with it.

Last edited by sidevalve8ba; 11-14-2023 at 09:28 AM.
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Old 11-14-2023, 10:41 AM   #7
Krylon32
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Default Re: Motor City Flathead - Mark Kirby Camshaft Specs

You might give Goller's Hot Rods 419-428-2271 a call. Phil has been handling most of the Motor City parts since Mark Kirby passed away.
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Old 11-14-2023, 08:03 PM   #8
19Fordy
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Default Re: Motor City Flathead - Mark Kirby Camshaft Specs

Gee, I sure wish Mark Kirby was still with us.
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Old 11-15-2023, 07:47 AM   #9
sidevalve8ba
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Default Re: Motor City Flathead - Mark Kirby Camshaft Specs

I used to know who ground his cams but I have forgotten.
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Old 11-15-2023, 08:06 AM   #10
Tim Ayers
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Default Re: Motor City Flathead - Mark Kirby Camshaft Specs

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I used to know who ground his cams but I have forgotten.
Was it Tatum in Washington State?
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Old 11-15-2023, 10:37 AM   #11
V8 Bob
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Default Re: Motor City Flathead - Mark Kirby Camshaft Specs

Tatum was a competitive engine builder. IIRC, Crower ground most if not all MCF cams.
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Old 11-15-2023, 10:40 AM   #12
Tim Ayers
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Default Re: Motor City Flathead - Mark Kirby Camshaft Specs

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Tatum was a competitive engine builder. IIRC, Crower ground most if not all MCF cams.
Thanks. Crower makes sense.

I do recall Tatum offering cams and "special" grinds. I believe Dave and Mark were friends.
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Old 11-16-2023, 09:46 PM   #13
scicala
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Default Re: Motor City Flathead - Mark Kirby Camshaft Specs

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3/4 intake 29 -72, exhaust 72-29, lift .370, duration 282. Full: intake 28-73, exhaust 73-29, lift .420, duration 382
I assume that's a typo with the 382 duration on the full race cam. Should be 282.

Sal
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Old 11-16-2023, 10:10 PM   #14
flatjack9
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Default Re: Motor City Flathead - Mark Kirby Camshaft Specs

good catch. I'll make the change
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Old 11-16-2023, 10:36 PM   #15
Jeep09
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Default Re: Motor City Flathead - Mark Kirby Camshaft Specs

I got to confirm the camshaft is a stamped Crower , it’s labelled “6 39004”. The build sheet shows was built in 1994 by MCF
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Old 11-20-2023, 03:55 PM   #16
Jeep09
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Default Re: Motor City Flathead - Mark Kirby Camshaft Specs

Will this cam work in my application? In have an MCF cam, the full race version

Full: intake 28-73, exhaust 73-29, lift .420, duration 282..

2800 pound truck, 3.73 gears, Tremec 5 speed
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