OHV for Model A engine
- Thread starter kenparker
- Start date
jim1932
Well-known member
Jim Brierley
Well-known member
Does the Cook OHV run with a reconfigured cam/valve setup? Looks like the posted photos show the intake valves being smaller then the exhaust valves. Something's not right. Why go through all that modification and screw up the valve sizes.
As with any A/B engine, the stock cam is in the block so any stock or performance re-grind can be used. Most run re-grinds, why would you put a stock cam in a 4-port? My current turbo engine runs a 280* cam, I have run as much as 320* in previous configurations. Cooks originally had both valves the same size, this one and mine now have larger intakes than exhausts. They originally had 1928 Buick rocker arms, 1.25:1 ratio, as did Cragars.
As with any A/B engine, the stock cam is in the block so any stock or performance re-grind can be used. Most run re-grinds, why would you put a stock cam in a 4-port? My current turbo engine runs a 280* cam, I have run as much as 320* in previous configurations. Cooks originally had both valves the same size, this one and mine now have larger intakes than exhausts. They originally had 1928 Buick rocker arms, 1.25:1 ratio, as did Cragars.
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Jim Brierley
Well-known member
hardtimes, 7:1 or 7:1 or even 7:1, your choice.
jim1932
Well-known member
yes but what cam grind??
Sorry, I meant what cam grind do you recommend for your head, if running 1.7 intakes, headers and dual 81's?
AL in NY
Well-known member
Jim Brierley - I'm just saying it looks like on this head the exhaust valves are larger then the intakes unless the changed the cam design and reversed the location of the intake and exhaust valves, because any high performance modification I have ever seen, the intake valves were always larger than the exhaust valves. I just wanted to understand the head design.
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hardtimes
Well-known member
!johnneilson
Well-known member
Al,
In the pics shown, the valves are the same size. It may look smaller but no they are not. The period when these heads were designed did not use the larger intakes. In fact, they still used the cartridge fire design for the spark plugs. Most of the designs still followed the large chamber without any squish area. The Cook design I think was a good place to start as it attempts to create turbulence.
John
Mark.
kenparker
Well-known member
Here are pictures of the engine I refered to in my first post.
Cook OHV with twin strombergs. 39 transmission and Laycock Overdrive. She is butiful. Still working on a front brake issue and have not driven it yet.
Cook OHV with twin strombergs. 39 transmission and Laycock Overdrive. She is butiful. Still working on a front brake issue and have not driven it yet.
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RawhideKid
BANNED
Ya know, there is just something about a Swagelok plumbed car that makes me wonder why you would go to the AN fitting for the fuel when Swagelok has the SS braided lines that they will cut to fit? They also have off the shelf lengths and you just add your ferule to.
Definitely a sweet ride and I really hope you get that front brake problem fixed. If you have serious problems, why not give Randy Gross a jingle, he is one smart cookie. He sure knows his Model A brakes and got my Beast stoppin swell.
Hey, what/who's water pump is that, and what is it off of? Looks like something from a tractor or stand alone piece of farm equipment.
Definitely a sweet ride and I really hope you get that front brake problem fixed. If you have serious problems, why not give Randy Gross a jingle, he is one smart cookie. He sure knows his Model A brakes and got my Beast stoppin swell.
Hey, what/who's water pump is that, and what is it off of? Looks like something from a tractor or stand alone piece of farm equipment.
California Travieso
Well-known member
Rawhide,
I saw a video on YouTube that Charlie Yapp made of his Roof 101 Cyclone OHV conversion for the Model A engine. He had a similar water pump and he said it was a Model T accessory pump that works with the stock oil filler tube.
https://youtu.be/gxH-46x0tdw
David Serrano
hardtimes
Well-known member
Model T water pump. Well, Model T never came from Henry with a water pump. Aftermarket took care of that. Go to a swap meet and probably see several varieties of said pump. An old timer buddy uses one like pictured on his B and looks identical.
What I'd like to know is...what is that gen/alt looking thing and what's it from ?
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RawhideKid
BANNED
That is a Denso 35amp alternator. You can get them with self energizing that only require the one wire to the battery.
https://www.amazon.com/ALTERNATOR-E...881-64201/dp/B06X91FHND/?tag=atomicindus08-20
https://www.amazon.com/ALTERNATOR-E...881-64201/dp/B06X91FHND/?tag=atomicindus08-20
Offy 220
Junior Member
Hey Paul,
Good question. I know several guys, just local, who have MANY different kinds of A/B OHV heads. Some I've never heard of. Many are in museums, but not nearly as many as in personal collections. The personal collections may as well be in museums, as they , IMO, will not see the light of day while those guys live. Just talked with an OLD dude yesterday, who came to visit/talk shop. I ask him this very question. He says....after I die, my family will have them to deal with and probably will end up in a museum. I then ask him...what would have happened to guys like you, when you raced, if all of that equipment had not been available..silence.
HardTimes,
Years ago my dad worked with an older mechanic [they were both the same age] his name was Bill LaRosa [or Rosie] and his son Mike worked for the Ford plant in Pico Rivera.
I remember going to his house as a youngster and he had 4 bangers and OHV heads stacked in his garage. He also had a pre WW2 sprint car with a 4 port Riley. He didn't care too much for Strombergs but like a lot of the older generation he had a liking for Winfield carburators. Do you know if he is still around or what has happened to his 4 bangers and other rare equipment he had? I think he had about every "rare" head made back before the war.
Thanks,
Bruce [Offy 220]
pooch
Well-known member
Hey Paul,
Good question. I know several guys, just local, who have MANY different kinds of A/B OHV heads. Some I've never heard of. Many are in museums, but not nearly as many as in personal collections. The personal collections may as well be in museums, as they , IMO, will not see the light of day while those guys live. Just talked with an OLD dude yesterday, who came to visit/talk shop. I ask him this very question. He says....after I die, my family will have them to deal with and probably will end up in a museum. I then ask him...what would have happened to guys like you, when you raced, if all of that equipment had not been available..silence
Typical old farts,
They are worse than top choppers of pristine bodies..
When they die, they THINK their junk will end up in a museum.
In reality, it will go in a skip bin (dumpster to you Yanks) for sure.
If you cannot or will not use when you are alive, then spread it around to us who care about it now in the present....
In 30 years our fossil fuelled cars will be banned,
All electric.....we will all be dead, and the Model A will be but a memory.
Jim Brierley
Well-known member
Bill LaRosa is still around and active, restoring his engines, etc. Mike still lives at home and together they make the necessary castings, etc., to complete the engines. You should see hi collection now!