Quote:
Originally Posted by Stentor
Rod,
Based on conversations with various folks (e.g., Inglese, Pierce, Keith Craft) as well as calculations using information and algorithms from a variety of sources, the optimum choke/venturi size for Webers on my 511 ci FE is between 49 and 52. The 48 mm Webers would not accommodate this large of a choke (from what I've been told for a street car it's not practical to go above a 42 choke with 48 mm IDAs--as low-end performance will suffer).
Furthermore, the estimated HP loss from switching from a carb to 48 IDA Webers on my engine ranged from 60 HP to 150 HP (something on which I didn't want to compromise).
The good news is it looks like the 48 IDA FE manifold is going to work just fine with the Berg 58 mm IDAs.
I will keep folks posted.
Stentor
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Yes, please keep us posted. While I think the 48's would be enough for my 482, I wasn't aware that you have a 511. More cubes is definitely a good reason for the bigger IDA's. Thank you for sharing.