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View Full Version : Cylinder Head Clearancing for High Lift Cams

Jagdpanzer
01-28-2017, 01:54 PM
Here are are few shots of the clearance machine work I had do to for the 0.500" lift intake cams going into this year's "winter project":

http://i540.photobucket.com/albums/gg333/pwasinger/Mobile%20Uploads/2017-01/461F7BB2-620F-4EB9-A221-9E4B88071BFE_zps3c29ibow.jpg (http://s540.photobucket.com/user/pwasinger/media/Mobile%20Uploads/2017-01/461F7BB2-620F-4EB9-A221-9E4B88071BFE_zps3c29ibow.jpg.html)

http://i540.photobucket.com/albums/gg333/pwasinger/Mobile%20Uploads/2017-01/339B3E1D-999C-431E-ACB6-3F49962720E7_zpsgoxupsrz.jpg (http://s540.photobucket.com/user/pwasinger/media/Mobile%20Uploads/2017-01/339B3E1D-999C-431E-ACB6-3F49962720E7_zpsgoxupsrz.jpg.html)

http://i540.photobucket.com/albums/gg333/pwasinger/Mobile%20Uploads/2017-01/F0665F26-F473-4E7B-B598-C70FAD0EC3E8_zpsaslkf0zn.jpg
(http://s540.photobucket.com/user/pwasinger/media/Mobile%20Uploads/2017-01/F0665F26-F473-4E7B-B598-C70FAD0EC3E8_zpsaslkf0zn.jpg.html)

http://i540.photobucket.com/albums/gg333/pwasinger/Mobile%20Uploads/2017-01/E22C393E-05EA-43DB-BA9A-9AE523BE22B4_zpsyvaq4yvc.jpg (http://s540.photobucket.com/user/pwasinger/media/Mobile%20Uploads/2017-01/E22C393E-05EA-43DB-BA9A-9AE523BE22B4_zpsyvaq4yvc.jpg.html)
ssrszz4
01-28-2017, 07:59 PM
Good work!

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Top Toy
01-29-2017, 08:29 PM
Pretty radical lift! Where did you get your cams made? Putting in after market pistons?

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oricale
02-02-2017, 10:35 PM
Very nice Phil!!!!

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alnukem
02-18-2017, 10:39 PM
That's pretty impressive!
ssrszz4
02-20-2017, 07:03 PM
What are the best cams to get for a stock lower end or is it best to stick to stock?

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XfireZ51
02-20-2017, 08:58 PM
What are the best cams to get for a stock lower end or is it best to stick to stock?

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That all depends on what you want out of the car. Are u porting th top end?
What kind of power are u looking for?
Hib Halverson
02-28-2017, 07:06 PM
Who makes LT5 cams with .500-in lift?

What size motor are they going into?

What's going to be the rev limit?
5ABI VT
03-03-2017, 11:09 PM
Where can I buy these cams lol :-D=D>
tpepmeie
03-04-2017, 07:51 AM
Where can I buy these cams lol :-D=D>

I have three sets available. Can be finished to any specification.

http://toddpepmeier.wixsite.com/pepmeierengines/product-page/camshafts
Hib Halverson
03-05-2017, 12:36 PM
What valve spring do you use with those cams?
tpepmeie
03-05-2017, 12:39 PM
Depends. On the mass of the valvetrain, rpm, and acceleration rates of the lobe. In my case, I used a Porsche spring (outer only). Phil used PSI I think.



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Hog
03-06-2017, 11:58 AM
And this is where one of the advantageous of the DOHC architecture comes into effect, esp. when comnparing an OHV SBC vs. a DOHC Chev engine. The lighter the valvetrain is, the less valve spring is needed, all else equal.