Alfa Romeo Bulletin Board & Forums - View Single Post - Weber tuning with Lambda sensor
View Single Post
post #110 of (permalink) Old 08-05-2015, 05:37 PM
alfaparticle
Senior Member
Platinum Subscriber
 
alfaparticle's Avatar
 
Join Date: Oct 2004
Location: Columbia SC
Posts: 12,973
Emissions 40's vs Classic 45's

I posted several AFR curves while I was tuning my 40DCOE116/117's and they had an S shape. I have swapped them out for a pair of 45DCOE152's and here are comparison curves of WOT runs in 3rd gear. The black one is the best torque/HP with the emissions carbs. The brown one is with the 45's with 150 MJ/200 AC/F16 ET and stock accelerator jets. The red one is the same setup as the brown but with "0" accelerator pump bleed back valves. The difference in the shape of the curves is striking. I made no other changes to the engine.
Attached Images
 

Ed Prytherch
79 Spider
76 Suzuki GT500
2011 Jaguar XKR

A little government and a little luck are necessary in life, but only a fool trusts either of them. - P.J. O'Rourke
alfaparticle is offline  
 
 
For the best viewing experience please update your browser to Google Chrome