Altitude adjustment for Carbs Options

[Harpo]

Good morning everyone,

Exactly what is involved to adjust the carbs for an elevation change from 4800 to 500 feet.

Thanks

David

[larryM]

X2 above

it depends on what engine & carbs you are asking about

if you are asking for a 911 914-6 with webers, there are "tried & true" jetting specs all over the internet and in Bruce Anderson's & other's books applicable to a sea-level car (500' is close enuf)

if you are talking about a 914-4 with either webers or dellortos, get the VW performance books such Tomlinson's & ask on those VW forums - probably 3000 vw guys can tell you how to jet for a 4-cyl

if you are asking about Zeniths - say so - and post your question on the Pelican 911 Tech forum

- even better search that forum first for your specific setup, whatever it is

i can provide my weber 40-IDA jetting & venturi setup for a sixer determined via use of an 02 sensor and with reference to the above sources, - but don't reply here for the answer cuz i am not subscribed to the thread