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#1
12-16-2013, 05:58 PM
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2801 cam lobes good or bad?
2801 cam lobes good or bad? Thank you for your comments
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#2
12-16-2013, 07:57 PM
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First picture left most lobe looks a little rough to me.
__________________
Skip Fix 1978 Trans Am original owner 10.99 @ 124 pump gas 455 E heads, NO Bird ever! 1981 Black SE Trans Am stockish 6X 400ci, turbo 301 on a stand 1965 GTO 4 barrel 3 speed project 2004 GTO Pulse Red stock motor computer tune 13.43@103.4 1964 Impala SS 409/470ci 600 HP stroker project 1979 Camaro IAII Edelbrock head 500" 695 HP 10.33@132 3595lbs |
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#3
12-16-2013, 08:25 PM
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Without seeing it person, I hate to guess but it looks like you have some spalling on the lobes.
__________________
“It takes considerable knowledge just to realize the extent of your own ignorance.” Dr. Thomas Sowell |
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#4
12-16-2013, 10:17 PM
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I bought this camshaft to learn how degree a cam and too check out the quality of the cam. Some of lobes look like their are offset a little bit . And I was wondering if it would affect the lifter rotation or break in. Any thoughts on this would be are appreciated. thank you
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#5
12-16-2013, 10:26 PM
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Quote:
Your last post, just popped up as mine posted. The last batch of pic's, the cam looks like it's new??? Cam lobes of flat tappet cams are not flat on the lobe surfaces from front to back. The lobe surface is tapered, or tilted, being higher at the back, because the surface of the lifter is convex. The lifter contacts the cam lobe only on half the lifter, between the center of the lifter and it's outside edge. The lifter HAS to rotate in it's bore and across the cam lobe to operate correctly, if not you lose the cam... breaking in a flat tappet is not difficult (properly that is...) Roller cams have none of this baloney action going on........ I don't know your degree of knowledge, just trying to be helpful.
__________________
1977 Black Trans Am 180 HP Auto, essentially base model T/A. I'm the original owner, purchased May 7, 1977. Shut it off Shut it off Buddy, I just shut your Prius down... 
Last edited by 77 TRASHCAN; 12-16-2013 at 10:40 PM. |
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#6
12-16-2013, 10:32 PM
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To me that cam looks wiped out. The lobes look as though the lifters were scrubing bad on them. Looks as if that cam was run dry for a bit because of the spots on the lobes. Don't use the cam as it will eat up your lifter in a short time.
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#7
12-16-2013, 11:15 PM
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Sorry for the confusions the cam is brand new and still has some of the protectant on the lobes.
I was just wondering if is usable or not! As for my degree of knowledge i assembled couple engine and did some cam swaping back in 80's that work out good. but that's about's it. I'm looking to do a head & cam swap so i'm relearning. Thank you for your replies Mike |
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#8
12-17-2013, 02:10 AM
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That's what the last summit cam (2800) I installed looked like. They don't show up all shiny. That looks normal to me. It looks kinda dusty, so try to keep things clean.
__________________
"...ridge reamer and ring compressor? Do they have tools like that?" |
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#9
12-17-2013, 09:11 AM
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The offset on the lobe should not hurt anything since the lifter does not ride on the edge of the lobe.
__________________
1971 Pontiac GT-37 Car is a junk yard dog and maybe one day will be restored. 
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#10
12-17-2013, 10:22 AM
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Some new lobes have such thick treatment on them they look and feel pretty rough. So if new probably not a big deal.
__________________
Skip Fix 1978 Trans Am original owner 10.99 @ 124 pump gas 455 E heads, NO Bird ever! 1981 Black SE Trans Am stockish 6X 400ci, turbo 301 on a stand 1965 GTO 4 barrel 3 speed project 2004 GTO Pulse Red stock motor computer tune 13.43@103.4 1964 Impala SS 409/470ci 600 HP stroker project 1979 Camaro IAII Edelbrock head 500" 695 HP 10.33@132 3595lbs |
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#11
12-17-2013, 10:48 AM
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Never had a quality problem on a Summit cam, lube it , break it in and go happy
__________________
63 Catalina coupe 467 cid budget drag car 11's 1/4 , 7.3 1/8th pump gas n/a 66 Star Chief Executive 57k mile 69 Le Mans 2 dr HT 350 85k mile 15 sec 1/4 69 Firebird 400 Burgandy/Black 70 Olds Rallye 350 F85 4 speed 3.91's 70 Olds Cutlass Cruiser Red Wagon 350 101k miles 15 sec 1/4 12 sec w 455 74 Cheyenne Super C10 LWB Gen 6 454 w ZZ502 cam 3.07gear 13.1 1/4, 8.3 1/8 2020 RAM 1500 SLT 4x4 5.7 A8 Hemi 2007 Hummer H3 3.7 liter turd 2019 Chevy Spark petrol car 38 mpg |
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#12
12-17-2013, 12:00 PM
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Ok i guess i'm a little nervous about camshaft and lifter quality nowadays!
I was checking the camshaft and degreeing it in an old 400 i had on the engine stand. I was Compare the new camshaft to a old factory camshaft which i Pull out of the old 400 and the casting look alot better on the old camshaft. Thanks for your replies Mike |
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