Holley 20-12 Accelerator Pump Camshaft Assortment Kit
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So I obtained the eight pump cams as well as the two screws. Everything appeared to be in order until I began to examine the cameras more closely. I wanted to get my hands on the blue cam, so I ordered this kit. I begin to examine it more closely and notice that it is inscribed with the number 234 on it. I examine the black cam, which appears to be identical, and notice that it, too, has 234. The blue cam should be stamped with 427, according to the's I should have. Someone must have poured blue plastic into the black cam mold, resulting in two black cams of two different colors for me. I can't believe I'm about to ask for a refund on some plastic. It's a real drag.
These should come with a chart that shows which colors affect accelerator pump displacement. br>Had to look up information on the internet to figure out which color to try next to fix a flat spot on my Holley. br>Next, I'm going to try blue over my stock white. If you search the internet, you can find a resource that shows how many cc they produce and the pattern at various throttle positions. This ought to be included in the purchase price. br>Colors are off; I had to read some of the numbers to figure out which one was which, and not all of the numbers were numbered.
The only reason I didn't give it five stars is because Holley absolutely rips you off on price. br>br>However, I can't believe Amazon carries this stuff; they have a huge inventory, and I ALWAYS get it right away. Hello, Summit and JEGS. br>br> WAKE UP before I go to Amazon and buy that LS9 crate motor with Free Shipping. 'You have to give it to Jeff Bezos,' says the author. It's gotten to the point where I come here first to shop. br>br> Have I ever told you about how I bought induction motors for my home heaters on Amazon?.
Although there aren't many discernible differences in some of the cam profiles, I was able to increase the size of my two-barrel Holley carburetor (4. 3L GL- D Volvo Penta engine) to make my boat run like a champ. I was going through a rough patch. Until you rebuild the carb and change this, your idle acceleration will stutter. I was relieved that I didn't have to fiddle with the nozzles on my accelerator pump; That's how it worked!.
I was able to find the right cam for my Holley.
My Proform 650 is equipped with a blue cam.
This was a great solution.
On my Holley, I needed to replace a worn part. When the new part is installed, it makes a huge difference.
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