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#1
12-04-2013, 01:46 PM
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compcams 252h
Does this cam look good for 60over pontiac 301 and with the 106 centerline can i install it straight up
Keyword Part # Grind # Search Camshafts Shop By Engine Components Merchandise Tech Support Forum Cam Recommendation Contact Us Warranty Registration Social Media CPG Nation Community Events Schedule Join Our Mailing List Charts, Graphs, & Specs Technical FAQ Technical Info Articles Instructions Camshaft Sounds Videos CamQuest™ Online Catalogs Online What's New About COMP Cams® Logo & Image Archive Contingency Program Sales Rep Sign-In Policies Site Map PERFORMANCE PARTNERS Select Language Powered by Translate Videos Contact Us Description Return to Store Item Part Number: 51-229-3 Grind Number: 252H Lifter Type: Hydraulic Lifter Engine Family: Pontiac 265-455 c.i. 8 cyl. 1955-1981 Description: Hydraulic-Smooth idle with fuel economy for 326 to 400. Strong torque. Best cam for 301. Cam Family: High Energy™ Hydraulic Flat Tappet Camshafts Specifications Intake Exhaust RPM Range: 800 to 4800 Valve Lash: Hyd. Hyd. Valve Timing: 0.018 Duration: 252 252 Lobe Separation: 110° Duration @ .050" Lift: 206 206 Intake Centerline: 106° Valve Lift: 0.425 0.425 Lobe Lift: 0.283 0.283 Valve Timing @ 0.018 Lift: Recommended Components Installation Notes (These notesapply to theabove recommended components with the trailing installation note numbers) Contact usvia email Return to StoreItem Exhaust Closes 12 ATDC Opens 60 BBDC Intake 20 Opens BTDC 52 Closes ABDC Component |
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#2
12-06-2013, 07:48 AM
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I do not know what the stock cam spec`s are, but for a mainly street 301 non turbo motor, that 252 cam is going to want to be above 2500 rpm to get into the bottom of its peak torque band. If you had 320 plus cid that would be a better fit.
What gears are in the back of the car?
__________________
Wernher Von Braun warned before his retirement from NASA back in 1972, that the next world war would be against the ETs! And he was not talking about 1/8 or 1/4 mile ETs! 1) 1940s 100% silver 4 cup tea server set. Two dry rotted 14 x 10 Micky Thompson slicks. 1) un-mailed in gift coupon from a 1972 box of corn flakes. Two pairs of brown leather flip flops, never seen more then 2 mph. Education is what your left with once you forget things! |
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#3
12-06-2013, 08:29 AM
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I went with a spec-5 (066) in mine which is a big step up from stock. you'll need to check your springs. stock cam only has .375 lift. it's tinny! anything over 200 at .050 is going to be a big change. I found the stock springs in mine were the same as some single spring SBC.
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#4
12-06-2013, 08:32 AM
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The lifters have a low band on them too. SBC maybe? I think normal pontiac lifters would work though.
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#5
12-06-2013, 11:23 AM
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The intake duration on the 1979 220hp TA 400cid motor was like 198' so if you ask me 206 duration is hot for that. Even if you had the gearing for it(like 3.90s) the motors power band with stock heads will be quite small and no fun to drive!
__________________
Wernher Von Braun warned before his retirement from NASA back in 1972, that the next world war would be against the ETs! And he was not talking about 1/8 or 1/4 mile ETs! 1) 1940s 100% silver 4 cup tea server set. Two dry rotted 14 x 10 Micky Thompson slicks. 1) un-mailed in gift coupon from a 1972 box of corn flakes. Two pairs of brown leather flip flops, never seen more then 2 mph. Education is what your left with once you forget things! |
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#6
12-07-2013, 12:55 PM
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My 1978 motors manual has 2 different cams for 301, a automatic and a stick cam
Lift on them ....stick = .377 auto = .364 Only valve timing shown is Intake opens before TDC.... stick =31`... auto = 27` Then you have to wonder how this timing is measured at .020 or .050 .005 or the slightest movement of a dial caliper Something to consider... the modern day fast ramp lobe profile on paper is going to appear bigger than it is installed in the engine, how many times have we heard X cam stopped producing X power way early in the power band, I was expecting more from X duration at .050... Answer is in the newer lobe profiles they produce torque earlier on than one would think .
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A man who falls for everything stands for nothing. Last edited by Formulas; 12-07-2013 at 01:09 PM. |
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#7
12-07-2013, 05:31 PM
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I would run the XE250 over that cam. New springs, of course. Run the 864 lifter, not the 852 that the other Pontiacs run. Get straight studs and poly locks.
Usually not a big fan of the smaller XE cams in the larger engines but, this is where we need to build cyl. pressure with small cubes, low compress, AND poor heads. |
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