[brandx]

After spending hours upon end with double pump & vac sec carbs on my small ford its not hard to say which is better for street use. I have multiple carbs in dble & single pump in holley. The main problem with stumble in vac carbs is tuning. Most tuners dont spend enough time with the idle circuts. Although I have had good success with dbl pumps the vac carb still comes out on top for street use for me. I am still spending a lot of time with timing. To me the jury is still out on vac timing.