vacuum at redline

[flyinlow]

I was watching an engine tuning video. What ,if any ,vacuum guage reading should your passenger be seeing as the engine approaches it max rpm?

[elacruze]

1" + or - .5" depending on your combo/purpose/driving style.

Great article-

http://www.carcraft.com/techarticles/selecting_right_carb/index.html

[firefighter3931]

I was watching an engine tuning video. What ,if any ,vacuum guage reading should your passenger be seeing as the engine approaches it max rpm?

If the engine is pulling in excess of 1in hg of vacuum....the carb is technically too small (for max performance)

For a street car it's not a huge issue unless the carb is grossly undersized. 



Ron