quote:Originally posted by Corey Price:
The picture in this thread interested me. It appears that with the Cain manifold, the 48 IDF's sit under the engine screen with air cleaners. I love the look of Weber carbs but never really liked the idea of running without an air cleaner.
Jack D. also posted about potential fire hazards if Weber carbs are used with air cleaners due to fuel reversion. I think you'd have to set up the engine for this by choosing or having a custom low-overlap cam made specifically for this.
In my experience the carbs don't even like having screens over them. The difference with and without is very noticible.
Also, I may be wrong again, but I haven't seen IDF's larger then 32's. Have you seen 48 IDF's?
If you look at some of the '60s muscle car tests, it was very common to pick up a few 10ths by taking off the air cleaner assembly.
To me it feels like you easily are picking up something like 80 to 100 hp in a 1/4 mile run.
All carbs like to run around naked.