Hi, I am looking for some input for a new carb. I have a 347 stroker in my car that is pushing approximately 400 hp and the carb I am running is a Holley 650 double pumper. I am looking to go to something that is a little more of a street carb but still has the balls to give me the power that I love to have. I am looking into getting a Holley Street Avenger 670. Does anyone have any experience with these? I can get it for a great price from a local shop and from what I have read they are easy to adjust and I should get alot better gas mileage when I am just cruising around. I am taking the weekend to decide and wanted to get some thoughts, ideas, opinions from any of you. Thank-you!!
i dont think the 670 will get significaly beter gas milage. the biggest factor on mpg is your foot. if you dont floor it every where and are light on giving it gas the double pumper will get just as good as mpg as a vac. secondary carb will. now if you heavy footed and like to accelerate faster than the rest of the people around you the vac secondary can save you a little bit of mpg because its not dumping the extra fuel that the double pumper does.
Edelbrock 1460/1470 with electric choke has the manners of an EFI car when it's tuned right, and it's easy to get tuned right. Starts right up the first time you turn the key, in any weather, transitions very smoothly, and it still gets the job done when you stand on it.
Spend the money on a wide band and Holley books. Learn to tune the carb by the wide band and books. Youll be happy you did.
