weber jetting HIGH ALTITUDE

[kanurys]

What experience do you guys and girls (any? haha) have with jetting a weber dgev for high altitude? I live at 6600 ft and will only be driving up, say to 14,000 max on 4x4 trips.

 

I can always go with the trial and error method, but I was wondering if there is anyone with this similar situation.

 

-Sesh

[Don_Quixpunch]

I got my jets from John at Aircooled.net. He's not so much a Subbie guy, but he is a Weber expert. If you get jets from him, let him know you talked to the guy with the red Brat and I'm still just a shade rich. HCs are at 2%. It passes emissions and is definitely acceptable, but if you can be even tighter on your jet sizes it's got to be a good thing.

[kanurys]

Don - Thanks for the response. I'll keep him in mind as I get to the tuning steps in my install. I read that the stock jetting is mostly only efficient at 0-4000 ft. so I'm sure I'll be playing with the jets over time.

[kanurys]

After a few months and the hitachi sucking more fuel and running more rough then ever, I decided to bite the bullet, get the high altitude jet kit and get that carb on there. I'll give the old rat's nest a little credit. It did consistently start at -5 deg F. But finally, it was failing. Onwards:

 

I'm starting to get the jetting right. This rig hasn't been over 10,000 ft. yet, and I'lll post when it gets there, but for now here's the jetting I have set up that makes the ea82 purr at 6,600 ft (keep in mind this is a well used EMPI Weber knock-off):

 

Primary Main Jet: 130

Secondary Main Jet: 140

Primary Air Corrector: 180

Secondary Air Corrector: 170

Primary Idle Jet: 65

Secondary Idle Jet: 55

 

I expect the secondary main to be a little rich when I get high , as well as the idle jets, but right now, it seems to run like a charm.

 

Thoughts, comments?

Edited March 6, 2010 by kanurys