What compression is best for turbo?
What compression is best for turbo?
Today, the average high-performance street or strip turbocharged four-cylinder race engine sports a compression ratio of 9.5:1, with some even running compression ratios as high as 11.5:1 or more on alcohol or E85. Modern technology allows our racing generation to get the best of both worlds.
Do you need to lower compression for a turbo?
The lower temperatures allow you to run more ignition timing advance, which makes significantly more power than increasing the compression ratio in a turbo engine. Turbo engines run lower static compression ratios to increase the amount of power they can reliable generate on pump gas.
Can you cam and turbo an engine?
Because overlap needs to favor the intake side, turbo cams tend toward far less duration than in an NA application. See all 4 photos Normally aspirated, supercharged, and turbocharged engines have different intake/exhaust pressure-ratio characteristics, so cam timing must be adjusted accordingly.
Who owns cam motion?
Kip Fabre –
Kip Fabre – Owner – Cam Motion inc.
Can you turbo a big cam?
If your cam is matched well to the engine, you’ll be fine. But a turbocharger with a bad engine combo will still be a bad combo.
How is the camshaft of an engine designed?
Just like that calculus class you wished you didn’t have to take (or avoided altogether), the camshaft in your engine is largely based on the same mathematical rules. To allow more airflow into your engine, a camshaft is designed with a profile (or curve) that provides a specific amount lift to the valve.
When does the exhaust open on a camshaft?
Exhaust opening (EO) happens before bottom-dead center (BBDC) and exhaust closing (EC) after top-dead center (ATDC). These points can be checked by degreeing the cam in the engine by degreeing or simply referencing from the information on the cam card supplied with each new camshaft.
What is the valve lift for a camshaft?
For most small-blocks, the standard rocker ratio is 1.5:1, so, by multiplying a theoretical lobe lift of 0.370-inch x 1.5 rocker arm ratio, we achieve a valve lift of 0.555-inch lift (0.370 x 1.5 = 0.555). By replacing the standard rocker arm ratios with a higher-ratio rocker arm, you can add valve lift and some duration.
How does moving the camshaft affect the intake valve?
Moving the camshaft from its installed position affects all four opening and closing points; generally, the most important is intake closing. So by advancing the cam, the intake valve closes sooner. While this improves low-speed torque, it compromises top-end power.
What kind of camshaft does COMP Cams use?
0.652 int./0.652 exh. (1) These blower and turbo camshafts from COMP Cams are available in a variety of mild-to-aggressive styles. These cams work with your blower or turbo to help provide the most power possible.
Why are equalized pressures used in Turbo cams?
Although elevated from a naturally-aspirated application, the equalized pressures allow camshaft designers to apply some of the theories behind N/A camshafts to turbo cams.
Can a custom camshaft be used for a turbo?
However, a custom camshaft isn’t a magic wand that will somehow fix mismatched components, or an incorrect combination. There are quite a few options for turbo combinations on the shelf at Comp Cams, and unless you have a unique combination or set of operating parameters, chances are, a shelf cam option exists that would work well for you.
How does a comp CAM work with a blower?
These cams work with your blower or turbo to help provide the most power possible. Select your preferred location and we’ll note which parts are ready to be picked up TODAY. Camshaft, Mechanical Roller Tappet, Advertised Duration 300/308, Lift .652/.652, Chevy, Big Block, Each
