What sort of cam grinds are being used in OHV T engines that can use the different properties that a Rajo or Fontenac head have.
I am thinking that something like a Model A grind with better carburation would improve the performance greatly.
John
From Perth WA
Best camshaft for a Rajo OHV engine
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Topic author - Posts: 14
- Joined: Wed May 11, 2022 11:12 pm
- First Name: John
- Last Name: Rowe
- * REQUIRED* Type and Year of Model Ts owned: 1918 RHD Speedster
- Location: Perth, Western Australia
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- Posts: 5172
- Joined: Sun Jan 06, 2019 12:18 pm
- First Name: Steve
- Last Name: Tomaso
- * REQUIRED* Type and Year of Model Ts owned: 1914 Touring, 1919 Centerdoor, 1924 TT C-Cab Express, 1925 Racer
- Location: Longbranch, WA
- Board Member Since: 2001
Re: Best camshaft for a Rajo OHV engine
I installed one of Chaffin's "driver" regrinds in my BB Racer near 30 years ago - quite happy with the results & response !
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- Posts: 130
- Joined: Sun Feb 24, 2019 4:29 pm
- First Name: Chris
- Last Name: Rini
- * REQUIRED* Type and Year of Model Ts owned: 1923 roadster
- Location: Huntington Beach CA
Re: Best camshaft for a Rajo OHV engine
There are infinite possibilities of cam grinds. When you go looking, ask yourself if you're looking for speed or torque, and then consider what RPM range you want. There are cam grinders out there who can customize to your needs, and that'll probably give you more satisfying results than "oh, just throw X in."
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- Posts: 835
- Joined: Sun Jan 06, 2019 11:15 am
- First Name: Andrew
- Last Name: Clary
- * REQUIRED* Type and Year of Model Ts owned: 1914 Runabout 1926 Coupe. Mercury Speedster #1249
- Location: Usa
Re: Best camshaft for a Rajo OHV engine
There is a wide range of cam grinds. Unless you are an engineery kinda guy or have a lot of engine experience your best bet is to get real world feedback. FYI, Steve Is one of the guys I’d listen to.
Andy
Andy
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- Posts: 653
- Joined: Tue Jan 08, 2019 7:03 am
- First Name: Chad
- Last Name: Azevedo
- * REQUIRED* Type and Year of Model Ts owned: 1926 Boattail speedster, 1912 Tourabout project, 1927 Speedster (build), 1929 Buick (future T tow car)
- Location: Henderson, TN
- Board Member Since: 1999
Re: Best camshaft for a Rajo OHV engine
I'm pretty positive I have a stock A cam in mine with the lobes knocked off. I'm not positive due to the builders rip and I was a bit too young to remember (few weeks old) when it was assembled. So I'm going off of what I remember hearing. The lobes being cut down allow for offset rockers to make up for the lift and being cut down allows for longer duration. The trick or course is to put the T nose on the cut down A cam.
"Those who fail to plan, plan to fail"