The Ford Barn

Ken/Alabama · 09-07-2018, 07:02 PM

Anyone have any specs on a Howard M12 cam? Got one in a engine I pulled today. It's pretty radical.

flatjack9 · 09-07-2018, 08:44 PM

Intake duration is 274 at .360 lift. Exhaust is 277 with .360 lift. Checked at .015 lift. 53 deg overlap with 112 deg lobe separation. Listed as a full race cam. I also have one, but haven't degreed it on my own.

Ken/Alabama · 09-07-2018, 08:47 PM

Thanks Jack.

flathead4rd · 09-08-2018, 02:51 PM

Jack. I have an Old Potvin cam in my 50. It's marked Potvin 415. I cannot find any information on it. Do you have any?

Ol' Ron · 09-08-2018, 03:48 PM

Most of the cam specs have little to do with the way an engine runs. The ramps and lift rate are an unknown here. However if the duration at .050" is listed, you'll have a better idea on how it will run in your application.

flatjack9 · 09-08-2018, 04:50 PM

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Quote:

Originally Posted by flathead4rd

Jack. I have an Old Potvin cam in my 50. It's marked Potvin 415. I cannot find any information on it. Do you have any?

Nothing on a 415.

Paul Bennett · 09-08-2018, 11:14 PM

Potvin:
and a small bunch more

flathead4rd · 09-10-2018, 08:27 AM

Thanks flatjack9 and Paul Bennett. It's quite lumpy and runs strong in a 286 CI flathead. I got it from Mark Kirby (motor city flathead) several years ago.

Ol' Ron · 09-10-2018, 08:59 AM

Not sure who's running Howard cams, but back in the Day the F9 was a very good track cam, and worked vert well on the street.

blucar · 09-10-2018, 12:00 PM

The Howard M8, classified as a 3/4 race cam in the mid '50's was a very popular cam for general street use, not to lumpy on the idle. I thought that I had an M8 in my 59AB, that is what I specified to the engine builder. Found out a few years ago that the cam in the engine is a Weber F1. It has always worked very well, a little lumpy on the idle, if the idle is set to low.

chap52 · 09-11-2018, 05:38 AM

Been running a Howard M-6 in my truck for years. Love it! Chap

Kahuna · 09-11-2018, 08:48 AM

Flathead4rd
Your Potvin 415 may be a Potvin 3/8 with a .415 gross lift.
Bored & Stroked may know for sure.
Potvin cams were/are powerful cams. I run a 425 in my engine
Jim

Tim Ayers · 09-11-2018, 09:04 AM

I think Howard's Cams are still in business. Might be worth Googling and giving them a call.

Tim Ayers · 09-11-2018, 09:05 AM

Quote:

Originally Posted by Kahuna

Flathead4rd
Your Potvin 415 may be a Potvin 3/8 with a .415 gross lift.
Bored & Stroked may know for sure.
Potvin cams were/are powerful cams. I run a 425 in my engine
Jim

According to my timing card, the 3/8ths has .375 gross lift.

chap52 · 09-11-2018, 12:56 PM

Here ya go... Chap

https://www.howardscams.com/

flatjack9 · 09-11-2018, 09:20 PM

Howard Cams is located right here in Oshkosh. They were bought by Competition Products. They do not have masters for any of the old grinds. They grind my cams for me.

Tim Ayers · 09-11-2018, 10:34 PM

Quote:

Originally Posted by flatjack9

Howard Cams is located right here in Oshkosh. They were bought by Competition Products. They do not have masters for any of the old grinds. They grind my cams for me.

Curious: I noticed the list "custom grinds" for flatheads. Do you give them the specs or do they recommend grinds from their list?

flatjack9 · 09-12-2018, 11:38 AM

Mostly give them the specs. Some have been incorporated into their recommendations.

Tim Ayers · 09-12-2018, 11:50 AM

Quote:

Originally Posted by flatjack9

Mostly give them the specs. Some have been incorporated into their recommendations.

OK, cool. Curious what the get for this service? Do they have blanks or do the regrind?

flatjack9 · 09-12-2018, 04:44 PM

They don't seem to be real keen on regrinds. Yes they do have new cores.

09-07-2018, 07:02 PM	#1
Ken/Alabama Senior Member Join Date: May 2010 Location: Alabama Posts: 3,260	Howard Cam Anyone have any specs on a Howard M12 cam? Got one in a engine I pulled today. It's pretty radical.

09-07-2018, 08:44 PM	#2
flatjack9 Senior Member Join Date: May 2010 Location: Oshkosh, Wi Posts: 4,527	Re: Howard Cam Intake duration is 274 at .360 lift. Exhaust is 277 with .360 lift. Checked at .015 lift. 53 deg overlap with 112 deg lobe separation. Listed as a full race cam. I also have one, but haven't degreed it on my own.

09-07-2018, 08:47 PM	#3
Ken/Alabama Senior Member Join Date: May 2010 Location: Alabama Posts: 3,260	Re: Howard Cam Thanks Jack.

09-08-2018, 02:51 PM	#4
flathead4rd Senior Member Join Date: May 2010 Location: Michigan Posts: 505	Re: Howard Cam Jack. I have an Old Potvin cam in my 50. It's marked Potvin 415. I cannot find any information on it. Do you have any?

09-08-2018, 03:48 PM	#5
Ol' Ron Senior Member Join Date: May 2010 Location: Chester Vt Posts: 8,860	Re: Howard Cam Most of the cam specs have little to do with the way an engine runs. The ramps and lift rate are an unknown here. However if the duration at .050" is listed, you'll have a better idea on how it will run in your application.

09-10-2018, 08:27 AM	#8
flathead4rd Senior Member Join Date: May 2010 Location: Michigan Posts: 505	Re: Howard Cam Thanks flatjack9 and Paul Bennett. It's quite lumpy and runs strong in a 286 CI flathead. I got it from Mark Kirby (motor city flathead) several years ago.

09-10-2018, 08:59 AM	#9
Ol' Ron Senior Member Join Date: May 2010 Location: Chester Vt Posts: 8,860	Re: Howard Cam Not sure who's running Howard cams, but back in the Day the F9 was a very good track cam, and worked vert well on the street.

09-10-2018, 12:00 PM	#10
blucar Senior Member Join Date: Jul 2010 Location: Ventura, CA Posts: 2,464	Re: Howard Cam The Howard M8, classified as a 3/4 race cam in the mid '50's was a very popular cam for general street use, not to lumpy on the idle. I thought that I had an M8 in my 59AB, that is what I specified to the engine builder. Found out a few years ago that the cam in the engine is a Weber F1. It has always worked very well, a little lumpy on the idle, if the idle is set to low. __________________ Bill.... 36 5 win cpe

09-11-2018, 05:38 AM	#11
chap52 Senior Member Join Date: Jun 2013 Location: Marana Arizona Posts: 1,776	Re: Howard Cam Been running a Howard M-6 in my truck for years. Love it! Chap

09-11-2018, 08:48 AM	#12
Kahuna Senior Member Join Date: May 2010 Location: NorCal Posts: 2,617	Re: Howard Cam Flathead4rd Your Potvin 415 may be a Potvin 3/8 with a .415 gross lift. Bored & Stroked may know for sure. Potvin cams were/are powerful cams. I run a 425 in my engine Jim

09-11-2018, 09:04 AM	#13
Tim Ayers Senior Member Join Date: May 2010 Location: NJ Posts: 6,181	Re: Howard Cam I think Howard's Cams are still in business. Might be worth Googling and giving them a call.

09-11-2018, 12:56 PM	#15
chap52 Senior Member Join Date: Jun 2013 Location: Marana Arizona Posts: 1,776	Re: Howard Cam Here ya go... Chap https://www.howardscams.com/

09-11-2018, 09:20 PM	#16
flatjack9 Senior Member Join Date: May 2010 Location: Oshkosh, Wi Posts: 4,527	Re: Howard Cam Howard Cams is located right here in Oshkosh. They were bought by Competition Products. They do not have masters for any of the old grinds. They grind my cams for me.

09-12-2018, 11:38 AM	#18
flatjack9 Senior Member Join Date: May 2010 Location: Oshkosh, Wi Posts: 4,527	Re: Howard Cam Mostly give them the specs. Some have been incorporated into their recommendations.

09-12-2018, 04:44 PM	#20
flatjack9 Senior Member Join Date: May 2010 Location: Oshkosh, Wi Posts: 4,527	Re: Howard Cam They don't seem to be real keen on regrinds. Yes they do have new cores.