The best hydraulic roller cam for a Chevy 350 depends on the engine’s roller compatibility, intended RPM range, and supporting parts. For a milder street setup, the COMP Cams 218/224 cam is aimed at TPI engines and calls for custom tuning. Speedmaster’s 218/224 option suits a street-and-strip build, while its 236/242 and 248/254 options offer longer duration. The COMP Cams Thumpr kit is a better fit for buyers seeking a pronounced idle and a cam-and-lifter package.
| Cam | Best For | Duration At .050 |
|---|---|---|
| COMP Cams Xtreme Energy 218/224 | TPI 305 or 350 builds | 218/224 degrees |
| Speedmaster 218/224 | Street-and-strip use | 218/224 degrees |
| Speedmaster 236/242 | More aggressive street-and-strip setup | 236/242 degrees |
| COMP Cams Big Mutha’ Thumpr kit | Very rough idle and a complete cam-and-lifter package | 243/257 degrees |
| COMP Cams Xtreme Energy 230/236 | Street machines with supporting upgrades | 230/236 degrees |
COMP Cams Xtreme Energy 218/224
This COMP Cams hydraulic roller cam is a targeted choice for a TPI 305 or 350 with upgraded exhaust. Its listed 218/224-degree duration at .050 inches, 112-degree lobe separation angle, and 1,500–5,500 RPM operating range describe a moderate performance profile within this group.
Best for: A TPI-equipped small-block build whose owner can arrange custom tuning. It was selected because the listing names TPI 305 and 350 applications and specifies an operating range. Caution: Custom tuning is required, and the listed application calls for upgraded exhaust.
Speedmaster Street/Strip 218/224
Speedmaster lists this cam for small-block Chevy engines from 265 through 400 cubic inches, including the 350. The 218/224-degree duration at .050 inches is paired with a street/strip powerband described as emphasizing mid-range torque and top-end pull. The hydraulic roller design is listed as having reduced friction and aggressive lobe profiles.
Best for: A street-and-strip build seeking a comparatively moderate duration option. It was selected for its stated small-block range and street/strip focus. Caution: The block must be roller-cam compatible, and lifters are sold separately; confirm the engine’s exact configuration before buying.
Speedmaster Street/Strip 236/242
This Speedmaster cam is listed for small-block Chevy engines from 265 to 400 cubic inches. Its 236/242-degree duration at .050 inches is longer than the 218/224 options above, making it the more aggressive comparison for a street/strip-oriented build. The listing describes strong mid-range torque and top-end pull.
Best for: Buyers comparing a more aggressive Speedmaster profile for a roller-compatible 350. It was selected because its stated displacement range includes the 350 and its duration sits between the milder and longest options in this roundup. Caution: Lifters are sold separately, and the block must be roller-cam compatible.
COMP Cams Big Mutha’ Thumpr Kit
This kit combines a COMP Cams 12-602-8 Big Mutha’ Thumpr camshaft with Redline Performance retro-fit link-bar roller lifters for listed SBC engines from 283 to 400 cubic inches. The specified profile is 243/257 degrees of duration at .050 inches, .531/.517-inch lift, and a 107-degree lobe separation angle. The listing describes a very rough, choppy idle.
Best for: A 350 build prioritizing an aggressive idle and a bundled cam-and-lifter setup. It was selected because the listed engine range includes the 350 and the kit includes retro-fit lifters. Caution: Its very rough idle and aggressive specifications make it a different choice from a milder street cam. The listing states a lifetime warranty applies if installed by a certified machinist.
COMP Cams Xtreme Energy 230/236
This COMP Cams cam has 230/236 degrees of duration at .050 inches, a 110-degree lobe separation angle, and a listed 2,200–5,800 RPM operating range. The product information describes it as a street-machine option but calls for an intake, headers, a stall converter, and suitable gears.
Best for: A street machine with the supporting parts to match its higher operating range. It was selected as a mid-to-aggressive COMP option between the 218/224 cam and the Thumpr kit. Caution: The listing specifies a 2,500-plus stall converter and supporting upgrades, so it is not the most straightforward choice for a stock-style combination.
Buying Guide: How To Choose A 350 Hydraulic Roller Cam
Does your 350 block support a roller cam?
Check the block and existing valvetrain before choosing a cam. The Speedmaster listings specifically require a roller-cam-compatible block. Some products are camshaft-only, while the Big Mutha’ Thumpr listing includes retro-fit link-bar lifters. Do not assume the parts in one listing are included with another.
How much duration should you consider?
Compare duration at .050 inches as one part of the selection, not as a complete prediction of engine behavior. The 218/224 options have shorter listed duration than the 230/236, 236/242, and 243/257 choices. Match the cam to the engine combination and intended use rather than choosing solely by the largest numbers.
What supporting parts or tuning are required?
Read each product’s requirements before choosing. The COMP 218/224 listing calls for custom tuning and upgraded exhaust for its stated TPI application. The COMP 230/236 listing calls for an intake, headers, stall converter, and gears. Confirm that the cam’s requirements fit the transmission, rear gearing, and engine parts in your build.
Should you choose a kit or a camshaft alone?
A camshaft-only listing may require separately sourced lifters, as the Speedmaster listings state. A kit can simplify parts selection by bundling specified components, but verify exactly what is included and whether the kit fits the block. Have a qualified engine builder confirm the full combination before installation.
Frequently Asked Questions
Will every hydraulic roller cam listed fit a Chevy 350?
No. Several listings include the 350 in their stated engine range, but block compatibility and the full engine setup still matter. Check the product details and confirm fitment for the specific block.
What does duration at .050 inches mean?
It is a common camshaft comparison measurement showing how long a valve is open at a specified tappet lift. Use it to compare listed profiles, while also considering lobe separation, lift, operating range, and required supporting parts.
Which option is listed for a TPI 350?
The COMP Cams Xtreme Energy 218/224 listing names a TPI 305 or 350 with upgraded exhaust and says custom tuning is required.
Do the Speedmaster camshafts include lifters?
No. The Speedmaster product details state that lifters are sold separately and that the block must be roller-cam compatible.
Which listed cam is described as having a very rough idle?
The COMP Cams Big Mutha’ Thumpr kit listing describes a very rough, choppy idle and specifies a 243/257-degree duration profile at .050 inches.