Camshaft Choice?? - Team Camaro Tech
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post #1 of 9 (permalink) Old Mar 9th, 19, 11:21 AM Thread Starter
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Camshaft Choice??

Hi All,

I have 69 air conditioned Camaro with BBC 427, M20, and 12 bolts 3.42 rear end. The engine has edelbrock aluminum heads, air gap intake, 750 DP Holley, and compression ratio 10:1. Car is for fun in the street and rarely strip. Both camshafts are Hydraulic flat tappet. First camshaft i have is the edelbrock 5062 and the second one is customed by G-Straub. Which one is stronger and does not shake the engine too much

Edelbrock specs are:

Basic Operating RPM Range: 2,500-6,500
Intake Duration at 050 inch Lift: 224
Exhaust Duration at 050 inch Lift: 232
Duration at 050 inch Lift: 224 int./232 exh.
Advertised Intake Duration: 302
Advertised Exhaust Duration: 304
Advertised Duration: 302 int./304 exh.
Intake Valve Lift with Factory Rocker Arm Ratio: 0.527 in.
Exhaust Valve Lift with Factory Rocker Arm Ratio: 0.553 in.
Valve Lift with Factory Rocker Arm Ratio: 0.527 int./0.553 exh.
Lobe Separation (degrees): 114

Straub's cam specs are:

Intake Exhaust
Duration @.050 220 228
Adv. Duration 270 282
Lobe Lift .3130 .3090
Valve Lift 1.7 Ratio .532 .525
Centerline 105 113
Open Close Open Close
Timing Events @ .050 5 35 47 1
Valve Lash (Hot) .000 .000
Lobe Separation: 109
Overlap: 6
Basic Operating RPM Range: 1600-6200
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post #2 of 9 (permalink) Old Mar 9th, 19, 11:40 AM
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Re: Camshaft Choice??

the custom grind has a better RPM range IMHO.

The Edelbrock doesn't come on until 2500rpm

I prefer cams with low/mid range power vs the high RPM ones. If it is all about the 1/4 mile...than the 1st cam
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post #3 of 9 (permalink) Old Mar 9th, 19, 06:01 PM
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Re: Camshaft Choice??

"Car is for fun in the street and rarely strip."

Easy choice. Go with #2.

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post #4 of 9 (permalink) Old Mar 9th, 19, 07:42 PM
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Re: Camshaft Choice??

I have a 327 with an RPM range similiar to your # 1 and it isn't really the greatest for the street. Go with choice # 2
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post #5 of 9 (permalink) Old Mar 10th, 19, 06:32 AM
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Re: Camshaft Choice??

#2 Especially if Straub recommended it. If not, call him.

69 COPO clone, 461" BBC 11.25:1 Compression
840 Rec Heads (2.25/1.88) AED 850 HO carb
Orig Exhaust Manifolds
Straub (Clay Smith) cam, 288/300 .600/.569 109.
TH400, 3500 stall, 4.11 12 bolt posi
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post #6 of 9 (permalink) Old Mar 10th, 19, 03:12 PM Thread Starter
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Re: Camshaft Choice??

I'll try #2.
Thanks guys
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post #7 of 9 (permalink) Old Mar 10th, 19, 05:05 PM
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Re: Camshaft Choice??

For what you're asking, I would be looking at grunt so maybe a 4x4 or RV type cam.
As for the "smooth" motor, a wider LSA will help.
I did a quick look and liked this one on a wider LSA 114

So, #2 would be my choice... Straub knows his stuff. I would go with his choice (as it looks like you are)

68 Camaro~LSx ~all motor
1.54 60'--6.95 @ 98.45 660'--10.96 @ 121.53
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post #8 of 9 (permalink) Old Mar 11th, 19, 06:58 AM
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Re: Camshaft Choice??

Go roller
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post #9 of 9 (permalink) Old Mar 14th, 19, 11:45 PM
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Re: Camshaft Choice??

Headers or manifolds? If manifolds you can only go so big before the overlap slows it down. Interestingly, something similar to a "modern" L78/LS6 grind (aka 114 LSA) would be one of the better choices with manifolds. If headers I'd tighten it up to 110-112. Also if manifolds the extra exhaust lift of the Eddy cam won't buy you much if anything.

Project: 67 RS, SS, L35, M20, J52, QJ Triple Black
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