Intake Runner Air Velocity Question

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The discussion centers on optimizing intake runner design for a 2-barrel intake system, particularly for a torque-focused engine. Key points include the importance of maintaining runner size for airflow efficiency and the potential benefits of smaller runners for increased air velocity. Participants discuss carburetor sizing, suggesting that a 250 CFM carb may be more suitable than a 350 CFM for the engine's needs. The impact of runner curvature on airflow is debated, with a consensus that minor variations won't significantly affect performance. Ultimately, the goal is to enhance horsepower while considering practical design constraints.
  • #31
..For carbs I'd check the Rochester 2G..

Look for earlier 2Gs because you will have more tune-ability.
 
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  • #32
fahlin
you need to get around more.:smile:
rochester doesn't sound too good.
sound expensive.
these Autolite 2100's are all over and
reasonable.
plus they're like working on half a holley.
gotta keep things simple to get the car to go sideways on demand.

Have A Nice Day!
 
  • #33
Yeah, all a 4V carb is just two 2V carbs. With all the circle track 'bomber' divisions or of the like, the 2G or 2GC are mandatory (maybe more if Fomoco and Mopar can run) unless the Holley 4211 is allowed. I have quite a few for my sisters race car that I got for close to zero. I have never played with Autolites, I know they are pretty plain looking compared to a Holley.

If you ever need to a 2V carb, check the local race track (mostly oval I am not sure if drag strips have a 2V classes) to see if they require a 2V carburetor to be ran in one of the classes, you could score a couple for a decent price from a racer. The hot rodding scene might be a few bucks higher if you are looking for the factory carbs of any type.
 
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