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03-27-2010
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#21 |
 Join Date: Sep 2005
Location: Washington
Posts: 955
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Re: Camshafts almost done
my, what big lobes you have
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03-30-2010
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#22 |
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Join Date: Aug 2005
Location: Fishers, IN
Posts: 815
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Re: Camshafts almost done
First design was:
Intake 254@.050 .500" lift exhaust 240@.050 .465" lift Still tweaking the final specs... chasing an additional .020" intake lift  , and trying to find the right valve springs.Todd |
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03-30-2010
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#23 | |
Join Date: Dec 2003
Location: Chicagoland,IL
Posts: 2,679
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Re: Camshafts almost done
Quote:
Todd, the extra lift really worth the hassle? Does it pick up that much more CFM and finding a spring. Pete
__________________
'91 #1635 PoloGreen 350 LT5 11.09 @ 129.27 11.04 @ 128.86 474RWHP 400RWTQ http://www.youtube.com/watch?v=SFNFOhGGlR4 http://www.youtube.com/watch?v=ZlRIOMwaDYY https://sites.google.com/site/peteszr1garage |
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03-30-2010
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#24 | |
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Join Date: Aug 2005
Location: Fishers, IN
Posts: 815
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Re: Camshafts almost done
Quote:
Last edited by tpepmeie; 03-30-2010 at 03:14 PM. |
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04-01-2010
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#25 | |
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Join Date: Dec 2003
Location: Chicagoland,IL
Posts: 2,679
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Re: Camshafts almost done
Quote:
 Todd,all the work and effort you put into this motor i hope you see 750hp 20 CFM is plenty and worth it,at least for me it would be. Pete
__________________
'91 #1635 PoloGreen 350 LT5 11.09 @ 129.27 11.04 @ 128.86 474RWHP 400RWTQ http://www.youtube.com/watch?v=SFNFOhGGlR4 http://www.youtube.com/watch?v=ZlRIOMwaDYY https://sites.google.com/site/peteszr1garage |
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04-01-2010
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#26 |
 
Join Date: Aug 2006
Location: Edmonton, Alberta or Phoenix, Arizona
Posts: 2,741
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Re: Camshafts almost done
Try to get .020" more lift anyways, past where they turn the corner, if you can.
__________________
There are no limit's mans ingenuity, just as mans ingenuity will never conquer the forces & behavior of this planet...Smokey Y. |
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04-01-2010
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#27 |
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Join Date: Aug 2005
Location: Fishers, IN
Posts: 815
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Re: Camshafts almost done
Here's the headflow curve up to .550 lift. about 10 cfm from .450 to .500, another +10 to .550, then it flattens out, only 2 cfm gain to .600. I have to double check the retainer to valve guide clearance to see if we can go above .500.
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04-05-2010
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#28 | |
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Join Date: May 2007
Location: Chicagoland, IL
Posts: 9,709
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Re: Camshafts almost done
Quote:
Have you finalized an LSA you'll be installing cams at? |
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04-05-2010
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#29 |
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Join Date: Aug 2005
Location: Fishers, IN
Posts: 815
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Re: Camshafts almost done
I think I've decided to stop at .500" lift. Spent the better part of the afternoon clearancing one head for the big lobes. Not sure I want to do it all again, and I can see where even more interference lurks if I go to 520. If I had a nice grinder like some of you guys it would go loads faster... but I was stuck using a dremel
 . Wore out three bits to get through all that aluminum, and I only did one head.
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04-06-2010
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#30 |
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Join Date: May 2007
Location: Chicagoland, IL
Posts: 9,709
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Re: Camshafts almost done
How will that affect your final cam profile if not looking for that last 10cfm?
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