A good choice would be a replacement camshaft designed as a direct replacement for a stock 305. These cams often provide a slight performance boost without requiring extensive modifications to the rest of the engine. Look for a cam with these characteristics:
* Moderate duration: Don't go for anything overly aggressive in terms of intake and exhaust duration. Something in the low to mid 200's degrees duration at .050" lift is a good starting point.
* Moderate lift: Similarly, keep the lift relatively moderate. Something around .450"-.480" would be suitable.
* Proper lobe separation angle (LSA): The LSA is crucial for street-ability. A LSA around 110-114 degrees is common in milder replacement cams.
* Consider the intended use: If you primarily drive around town, a slightly milder cam is preferable. If you want more power for highway driving or occasional towing, a slightly more aggressive cam might be appropriate, but stick to the moderate guidelines above.
Where to find a suitable cam:
* Summit Racing: They have a vast selection and can filter by engine type and desired characteristics. Use their search filters to specify a 1991 Chevy 305.
* Jegs: Similar to Summit Racing, they have a wide range of options.
* Comp Cams: They're a reputable camshaft manufacturer, and their website might offer a recommendation based on your engine details.
Instead of searching for a specific part number, use the search filters on these websites focusing on a "mild street" or "stock replacement" cam for a 1991 Chevy 305. Read the descriptions carefully to ensure it's a suitable match for your engine and driving style.
Important Note: Before you buy any cam, confirm its suitability with an engine professional or use the manufacturer's online tools (if available) to ensure it matches your engine's specifics. Improper cam selection can lead to poor performance or damage.
