I first thought this would be remedied by adjusting the idle mixture on the carb, but the idle quality didn't improve too much (I set idle mixture with a vacuum gauge, adjusting to get a maximum reading).
An advantage of not drinking is that I'm always super sober.). When I first fired the engine, I set the timing to about about 4 btdc while out of the car (while I'm not saying I'm not incapable of setting up the cam or timing gear or distributor wrong, I will say that I was very conscious and sober and deliberate about getting this right, and checked everything three times. And if it is a bit more torquey than horsepowery, that's fine (actually, preferred).įor those of you who feel more information would be helpful, I will describe what I have experienced so far with this hodge-podge, shoestring-budget assembly: no burnouts or 1/4 mile runs- I just need to get around town. Is it my lack of tuning skills? Or is it the cam? It could just be that this is an unholy marriage of parts, compounded by my lack of insight and meager budget. After 10 or 15 minutes on the road, it gets pretty hot. My problem is that the engine as assembled pings when I stomp on it, even though it idles smooth.
Visually comparing the old 327 cam to the marine 305 cam, I could tell the the ramp angle on lobes of the 305 is considerably steeper, which I think will lead to more aggressive opening and closing. That's fine, because I believe that will improve low-end torque and also mean a smoother idle compared to a hotter cam with a smaller lobe separation angle. I know that marine engines are cammed with less overlap. Will using a cam from a sbc intended for marine use be a problem for me in my El Camino? I have done some research, but I can't find a definitive answer. I made sure to keep the lifters in order so that they are properly paired with the correct cam lobes. Like I said, I had a reasonably low-mile/hour cam from a bad, HO 305 (225 HP, factory quadrajet, it has a tag on it says Volvo Penta AQ225E NO CU62799). Here are the details to what I am working with: 1964 327, 0.030 over, 1963 327 heads 1.72/1.50, GM squarebore intake with 1964 Rochester 4Jet carb (predating the Quadrajet), Jacobs electronic iginition. Many thought that was awful luck, but I preferred to think of it as the perfect opportunity to finally use some extra heads I had on the shelf, and recycle cam, lifters and timing set from a High Output Marine 305 that I was given a few months ago (in El Paso, nobody winterizes. Recently, I had the pleasure of experiencing a sunken valve seat on a many-mile 327, with original heads (non-hardened seats).
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