Quote:
Originally Posted by Gordo2
Mr. Abbott (Performance Oriented) - highly recommended the book "Weber Carburetors Tuning Tips and Techniques" (by John Passini) as I was tuning and configuring my PMO's.
A good book if you want to delve into theory.
Passini comments frequently that each engine is different (even though they may be built to the same specs / same parts / for the same purpose) - the calculations provide a good starting point to configure the carbs.
For my engine (3.2L with DC Cams GT2-102) - the calculations lead me to buying / installing PMO 46's w/38 chokes. I worked with this config for quite a while trying to smooth out the idle/progression to main circuit transition - swapping idle jets, idle airs, mains etc. I ended up backing the chokes down to 36's which I believe helped the transition, without giving up much for performance (the dyno shows HP drops off at upper RPM - but I didn't notice in my every day driving).
Good luck.
|
I just bought 40IDT came with 32mm chokes and 36mm chokes (two sets of chokes) and PMO intakes, and PMO fuel regulator to put in my stock 911s 1975. Which main jet, idel jet and which emultion tube is best if I installed 36mm chokes?