Cannot Establish a Secure Connection

The Internet Browser you are using cannot establish a secure connection to SummitRacing.com or JavaScript is disabled which will prevent you from being able to Log In or Checkout. If JavaScript is enabled the problem is likely due to SSL 3.0 being your default SSL setting. This makes you vulnerable to the "POODLE exploit" and to ensure your security, it is not allowed on our site. Please change your browser security settings to not allow SSL 3.0 and check to make sure that JavaScript is enabled. You can also update your browser using these links.

Tech Answer

I have a long duration, high lift camshaft. There's so much fuel in the exhaust it will burn your eyes at idle. Is something wrong with my Holley carburetor?

The most common cause is an improperly rated power valve. A camshaft of this configuration requires more air and fuel for it to operate efficiently. This in turn requires adjusting the curb idle screw to obtain the same idle rpm that you had with the stock camshaft. If you are having a problem with the air/fuel mixture screws not making a difference, the curb idle screw has probably been turned in too far. This causes the throttle plates to open too far and uncover the idle slots, allowing fuel to bypass the idle circuit and start pulling from the transfer slot. To correct this problem, raise the secondary throttle plates a little with the secondary adjusting screw. This provides more airflow into the engine and will allow you to lower the primary throttle plates. Another method would be to drill a 1/64" to 1/8" hole in each of the primary throttle plates on the side closest to the transfer slot. This will allow extra airflow into the carburetor and also allow you to lower the primary throttle plates.

Back to Results

Expert Advice & News

Expert Advice

News

Free Catalog

Our famous Summit Racing catalog and specialty catalogs too!

Sign UpArrow

Get up to speed with special offers and event info!

Sign UpArrow

As Seen on TV

Featured products from your favorite shows!

View NowArrow

New Parts

Your headquarters for the hottest new products!

View NowArrow
Close