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3180259 RV Cam? |
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Trader
AMC Addicted Joined: May/15/2018 Location: Ontario Status: Offline Points: 6909 |
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Posted: Nov/14/2018 at 6:40am |
I know from research that the 3180259 cam was an AMC "blank" and ground for purpose. There are many posts with different lifts and the separation is cast in the blank either 110, 112.
So just got a motor with one of these that isn't bad, just a little wear that a slight polish or regrind and nitrating would take care of. It's 110 separation, 1.390" base lobe and 1.700" max lift, intake and exhaust. That would put it at a 0.496" valve lift. Pretty high for a factory cam. Question, is this what AMC called an RV cam? Does anyone know the RV cam specs? Just some more information after some cleaning: - red paint between rear lobe and rear bearing - orange and white dots of paint on the rear of the cam - CU, C-26, D-26 cast in the middle - engraved behind the timing gear face, 1424 and 86-31-96 Thanks
Edited by Trader - Nov/15/2018 at 11:19am |
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Rebel327
AMC Nut Joined: Jan/26/2014 Location: Toledo Ohio Status: Offline Points: 358 |
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RV specs? 3/4 race specs?
Watching.... |
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ccowx
AMC Addicted Joined: Nov/03/2010 Location: Yukon Status: Offline Points: 3510 |
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The only cams I have heard of from AMC were the factory V8 Cams and the Group 19 cam. What was the application of this one? Very curious!
Thanks! Chris
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Trader
AMC Addicted Joined: May/15/2018 Location: Ontario Status: Offline Points: 6909 |
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Don't know the application but the engine was driven hard.
The 72 401 had been sitting for years is my understanding. Standard bore with hone marks still there, timing chain (well stretched) was silent roller type with steel gears - not nylon, pistons show little wear on the skirts but obvious valve contact on two. Main and rod bearings were down to copper on half and -0.010, will have to machine to -0.020. Block was painted gold, no sign of repaint from blue. I just bought the short block so have no other pieces.
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farna
Supporter of TheAMCForum Moderator Lost Dealership Project Joined: Jul/08/2007 Location: South Carolina Status: Offline Points: 19686 |
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I'd go to the Comp Cams site (or any cam maker site) and compare with their cam specs. The high lift tells me this wasn't likely an RV/towing cam though. They usually have more duration and not so high a lift. High lift is usually a racing type cam.
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Frank Swygert
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Trader
AMC Addicted Joined: May/15/2018 Location: Ontario Status: Offline Points: 6909 |
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Did that to some extent. Taking the 86-31-96 as a guess for the grind, 86+180=266 intake duration, 31 being overlap, 96+180=276 exhaust duration, I have not found a match. But the numbers do make sense if this is what they mean.
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