Hot Rod Forum : Hotrodders Bulletin Board - View Single Post - Confused about carbs, need help!
View Single Post
  #30 (permalink)  
Old 01-18-2013, 08:35 PM
Last photo:
Join Date: May 2011
Location: PDX Oregon
Age: 40
Posts: 32
Wiki Edits: 0

Thanks: 7
Thanked 0 Times in 0 Posts
Originally Posted by cobalt327 View Post
The idle vacuum doesn't matter as to whether to use a vacuum secondary or DP carb. When you floor it, either way the vacuum drops off to nearly nothing, regardless if it has a small or big cam.

Heavier vehicles and/or higher (lower number) rear gear ratio equipped vehicles are generally easier to drive w/a vacuum secondary carb. Light vehicles w/low rear gears take to a DP like a duck to water and aren't as likely to bog on you.

Either will work (the DP requires a learning curve- think of it as the difference between an AT and a stick shift). But for the street most guys tend to like a vacuum secondary-type carb better than a DP, and the mileage will tend to be better as well.

There's a lot of trickery that goes into a race engine. Glad you know the cam in this engine. I guess it's the heads that nothing is known about and I confused the two. My mistake.

Good luck.
Ah yes, I think I got it!
Reply With Quote