Rod/Cam Interference???Help!! - Team Camaro Tech
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post #1 of 3 (permalink) Old Mar 25th, 03, 04:14 PM Thread Starter
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Tom
 
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Join Date: Mar 2002
Location: New Lenox, IL USA
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Question

Need Help!!

I am doing my mockup assembly now and was fully expecting to have some clearance issues with #1,2,5 & 6 as many of you have indicated is typical with SB 400 and 5.7 rod combos. #1 cleared OK but I am not sure how much clearance I have yet but will verify the exact amount soon. My problem starts with #2 rod contacting the #1 intake lobe close to the peak of the lobe, is this correct. I don't think it have to do with cam/crank phasing as I lined up the dot on the crank gear at 12:00 and the dot on the cam gear at 6:00. Since I am only checking for adequate clearance I didn't think I needed to worry about degreeing the can in quite yet. This si a standard base circle cam as well......might I need to consider a small base circle cam instead?? Will a small base circle provide that much more clearance over a standard base circle?

The rods are Scat 4340 cap screw rods, it looks like I will need to grind .125 x 45* chamfer on the top corner to clear the cam. Does this sound right to you guys?

Tom


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post #2 of 3 (permalink) Old Mar 25th, 03, 04:37 PM
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Bill
 
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Sounds about right....start grinding. Shoot for around .050" clearance.
Hope this helps,

Bill Koustenis
Owner
Advanced Automotive Machine
Waldorf Md
1971 Chevelle "Heavy Chevy" original owner


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post #3 of 3 (permalink) Old Mar 25th, 03, 04:46 PM Thread Starter
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Tom
 
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Hey Bill!!

Everything has been balanced already......should I consider grinding the same amount off of all 8 rods in order to not mess with the balance work or is the amount to be removed typically not enough to worry about??

Better yet should I consider a small base circle cam and will one eliminate the need for any grinding? I was considering a new cam.

Tom

Tom


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