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#61
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Quote:
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"I only ride 'em, I don't know what makes 'em work." |
#62
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Check for excess pushrod rub on the guide plates. Too much will chirp and keep oil from coming out the rocker hole.
Clay |
#63
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Wilco.
__________________
"I only ride 'em, I don't know what makes 'em work." |
#64
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Thanks for the tip Jim. I tired this last night, but it didn't get the flow back. I'm trying to find time this weekend to pull the intake manifold and see what I see.
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"I only ride 'em, I don't know what makes 'em work." |
#65
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Line up the timing marks for zero advance with the rotor not pointing to #1 cylinder (overlap). Using a straight edge tell us if the intake or exhaust lifter is higher and using feller gauges by how much.
Stan
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Stan Weiss/World Wide Enterprises Offering Performance Software Since 1987 http://www.magneticlynx.com/carfor/carfor.htm David Vizard & Stan Weiss' IOP / Flow / Induction Optimization - Cam Selection Software http://www.magneticlynx.com/DV Download FREE 14 Trial IOP / Flow Software http://www.magneticlynx.com/DV/Flow_..._Day_Trial.php Pontiac Pump Gas List http://www.magneticlynx.com/carfor/pont_gas.htm Using PMD Block and Heads List http://www.magneticlynx.com/carfor/pont_pmd.htm |
#66
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Will do.
__________________
"I only ride 'em, I don't know what makes 'em work." |
#67
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Was the cam degreed during the build? Cam timing can be off considerably even with new timing components. If a degree wheel was not used there is no guarantee that the cam is installed as intended by the grind.
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The Following User Says Thank You to Dynoking For This Useful Post: | ||
#68
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Unfortunately, it was not degreed by the builder. He just installed it “dot to dot.”
__________________
"I only ride 'em, I don't know what makes 'em work." |
#69
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Quote:
But lets discuss the problem Having Owned and built Pontiac 350's. and have 2 here now with 46 heads, I can tell you for a fact that a '73 #46 head has around 97 CC chamber, Not 81 cc as you mentioned "as cast". The 400 engine with a 46 head has as smallest a 89 cc chamber. IF the 46 heads were milled as much as you say, your exhaust would hit the block and the intake would not fit unless it was severely angle milled to fit as well. So, your Static CR is probably around 8.6 and your dynamic around 7.6. This is about right for that motor and year. A set of 1970 # 11 heads would spruce that right up! ( 80 cc) A 71 stock 350 2bbl had 250 HP, but it has 350 Torque ( way more than a chevy 350 2bbl) |
#70
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In the end 350 cubic inches, is 350 cubic inches, no matter who manufactured it in the beginning. It should do the same work as a 350 chevy, olds, or buick street engine does.
It's not a handicap that Pontiac made it in the beginning, even though some people would have you believe that. From what has come to light, I believe that the rebuild was compromised from the beginning. Get it all sorted out, and it should run as good as any other GM 350. |
The Following 2 Users Say Thank You to Sirrotica For This Useful Post: | ||
#71
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In Fact, my point was that a Pontiac 350 is Better than a Chevy of the same era due mostly to Torque at low RPM
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#72
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Quote:
Another issue you have is your actual compression. The only way to know this is to CC your heads, Measure the installed piston height, actual deck height, and compressed head gasket thickness. Then do the math. Only after you have the actual compression ratio the proper cam can be selected. All GM engines regardless of manufacture with an advertised CR of 8-8.5:1 are actually closer to 7-7:5:1 as assembled. |
#73
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Quote:
Stan
__________________
Stan Weiss/World Wide Enterprises Offering Performance Software Since 1987 http://www.magneticlynx.com/carfor/carfor.htm David Vizard & Stan Weiss' IOP / Flow / Induction Optimization - Cam Selection Software http://www.magneticlynx.com/DV Download FREE 14 Trial IOP / Flow Software http://www.magneticlynx.com/DV/Flow_..._Day_Trial.php Pontiac Pump Gas List http://www.magneticlynx.com/carfor/pont_gas.htm Using PMD Block and Heads List http://www.magneticlynx.com/carfor/pont_pmd.htm |
#74
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Quote:
__________________
"I only ride 'em, I don't know what makes 'em work." |
#75
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Quote:
__________________
"I only ride 'em, I don't know what makes 'em work." |
#76
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FWIW, these are advertised as made in USA on the website. The reality, not so much...
__________________
"I only ride 'em, I don't know what makes 'em work." |
The Following User Says Thank You to FlyJS41 For This Useful Post: | ||
#77
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Quote:
I could not agree with more with your post! http://forums.maxperformanceinc.com/...7&postcount=66 http://forums.maxperformanceinc.com/...6&postcount=85
__________________
"No replacement for displacement!" GTOAA--https://www.gtoaa.org/ Last edited by 1968GTO421; 11-05-2020 at 10:28 PM. Reason: typo |
#78
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I just built and installed a P350 in my 84 C10 and love the power and mostly the torque, but like you I have a couple of lifters ticking even after resetting them 4 times. I will just run it as is till it breaks. With my tuned Q-jet it will roast the tires. The build is this: .040 bore, cast flattop pistons, Summit 2800 cam and lifters, 240 CFM 670 heads, 1.5 RR, exhaust manifolds with dual 2 1/4" pipes out the back, P4B edelbrock intake, 700r-4 trans with 2500 stall converter, 3.42 rear gears.
Steve
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67 Firebird 3440 lbs, Pump gas 537 IA2, tiger heads, 4.86 rear, 32 x 17.5's, full interior, 4 mufflers, street shape 1.36 60', 6.11@113.42 1/8 mi. 5.67@123 on small shot. |
#79
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Quote:
Stan
__________________
Stan Weiss/World Wide Enterprises Offering Performance Software Since 1987 http://www.magneticlynx.com/carfor/carfor.htm David Vizard & Stan Weiss' IOP / Flow / Induction Optimization - Cam Selection Software http://www.magneticlynx.com/DV Download FREE 14 Trial IOP / Flow Software http://www.magneticlynx.com/DV/Flow_..._Day_Trial.php Pontiac Pump Gas List http://www.magneticlynx.com/carfor/pont_gas.htm Using PMD Block and Heads List http://www.magneticlynx.com/carfor/pont_pmd.htm |
#80
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Provided I'm taking the measurement correctly (a small machinist ruler over the top of the valves), there is no gap.
__________________
"I only ride 'em, I don't know what makes 'em work." |
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