Re: [T3] ducting more air into the engine compartment for 42dcnf carbs

[Jim Adney <jadney@vwtype3.org>]

On 27 Aug 2008 at 8:58, David Guillory wrote:

> My engine is 1955cc with duel 42 dcnf webers, 110 cam, 75.1 compression. I
> believe that my carbs are not getting enough air at higher rpms and maybe at
> low too. My question is; How do I get more air into the engine compartment
> corectly? 

With all due respect, I believe you're barking up the wrong tree. Those carbs 
are plenty big, and with those carbs I don't think you can be using the stock 
air cleaner and ducting, so they must be completely open. There is no lack of 
air in the engine compartment.  

What are your symptoms and why do you suspect that they are caused by lack of 
air? Is it possible that your jetting is just too rich? That might seem like a 
"lack of air" but the solution is correct jetting.

Keep in mind that any aftermarket carb you buy will need to be rejetted after 
you put it on your engine. (Yes, I know, the people who sold you the carbs 
didn't tell you this. Sorry.)

PS: Thanks for changing the subject line to something appropriate, but you 
should also have deleted all the irrelevant verbage from the previous post.

-- 
Jim Adney
jadney@vwtype3.org
Madison, WI USA

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