Re: Biggest Valve Size in Stock Aluminum Hemi Head
[Re: Husker1]
#1387181
02/14/13 05:25 AM
02/14/13 05:25 AM
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Joined: Jan 2011
Posts: 4,785
Utah and Alaska
astjp2
master
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master
Joined: Jan 2011
Posts: 4,785
Utah and Alaska
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My stageV have 2.3I and 1.9E with the 4.5 bore
1941 Taylorcraft
1968 Charger
1994 Wrangler
1998 Wrangler
2008 Kia Rio
2017 Jetta
I didn't do 4 years and 9 months of Graduate School to be called Mister!
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Re: Biggest Valve Size in Stock Aluminum Hemi Head
[Re: Dragula]
#1387183
02/14/13 03:09 PM
02/14/13 03:09 PM
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Joined: Oct 2011
Posts: 559
Idaho
LaRoy Engines
mopar
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mopar
Joined: Oct 2011
Posts: 559
Idaho
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Should the question be, What is the biggest valve/camshaft combination I can run? Playing with tappet lift, times the rocker arm ratio, during the overlap phase, was very interesting.
Last edited by heyoldguy; 02/14/13 03:12 PM.
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Re: Biggest Valve Size in Stock Aluminum Hemi Head
[Re: LaRoy Engines]
#1387184
02/14/13 03:49 PM
02/14/13 03:49 PM
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Joined: May 2004
Posts: 12,386
Taxes & Virus's R-US, NY
Dragula
I Live Here
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I Live Here
Joined: May 2004
Posts: 12,386
Taxes & Virus's R-US, NY
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Quote:
Should the question be, What is the biggest valve/camshaft combination I can run? Playing with tappet lift, times the rocker arm ratio, during the overlap phase, was very interesting.
Cam selection is cam selection...Bigger valve is more flow at lower lift regardless of cam. He will need as much flow as he can get with that many cubes, and I would suggest the full CNC port on the heads. Saved the money up front by buying stock heads, now its time to pony up for the flow the engine will need.
My experince on playing the cam game, got me a ton of worn out parts...Valve guides, the seats, lash caps, push rod tips, all kinds of stuff wears out rather quickly with high lift cams and some street miles on them...I should know!
Big cams and overlap are great, but it all depends on your intended purpose. Seems like Bullet cams is the way to go these days, I would call them with all the flow numbers.
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Re: Biggest Valve Size in Stock Aluminum Hemi Head
[Re: Dragula]
#1387185
02/14/13 10:09 PM
02/14/13 10:09 PM
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Joined: Jan 2003
Posts: 6,389
nielsville, minn.
quickd100
master
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master
Joined: Jan 2003
Posts: 6,389
nielsville, minn.
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Quote:
Quote:
Should the question be, What is the biggest valve/camshaft combination I can run? Playing with tappet lift, times the rocker arm ratio, during the overlap phase, was very interesting.
Cam selection is cam selection...Bigger valve is more flow at lower lift regardless of cam. He will need as much flow as he can get with that many cubes, and I would suggest the full CNC port on the heads. Saved the money up front by buying stock heads, now its time to pony up for the flow the engine will need.
My experince on playing the cam game, got me a ton of worn out parts...Valve guides, the seats, lash caps, push rod tips, all kinds of stuff wears out rather quickly with high lift cams and some street miles on them...I should know!
Big cams and overlap are great, but it all depends on your intended purpose. Seems like Bullet cams is the way to go these days, I would call them with all the flow numbers.
I agree, I called Bullet cams gave them all the engine/head flow info. I also told them I wanted some gentle lobes that wouldn't beat the valve train to death. They ground me a great cam, haven't had ANY problems and the motor make fantastic power and torque.Dave 
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