[GlennCMC70]

where does the cooling air for the rad come from on 82-92 Camaros as delivered from the factory - front or bottom?

[1meanZ]

the common issue with the dual snorkel setup...and any carbed setup on a third gen is getting enough fresh air in. I saw a test "back in the day" of the 305HO car showing how cfm limited the OE dual snorkel setup was. With the short air filter/cleaner required for the low hood clearance, you can't really get enough air through to make power. I made a 30HP difference on the dyno going from my single snorkel setup to an open element. This was in my 82 Z28 T-10 that was swapped to a 350, made ~275RWHP with open element, wouldn't break 250RWHP with the single snorkel even with a "flipped lid".

You said the dual snorkel setup is CFM limited, but then you are comparing an open element to a SINGLE snorkel setup. Can you explain further here? Are you sure the base and lid are the same between the dual and single snorkel setups?

My experience wasn't that drastic. My 86 Camaro with a 355 roller motor made 310 RWHP with the dual snorkel setup....when I removed the air cleaner totally (open carb), it made an extra 12 RWHP. I also thought it would have made more of a difference, but was surprised by the results.

This is much more of the result I would expect. The dual snorkel intake setup was also offered by GM Performance Parts as part of the 350HO crate engine package. I have to assume from this that GM thought the intake was worth it or they woudn't have offered it, nor would they have spent the time and money in R&D and tooling to make a separate dual snorkel intake setup.

...and while you guys may show a gain with an open element air filter on the dyno, how much power do you lose sucking hot air from the engine bay all the time while driving...

[Todd]

the common issue with the dual snorkel setup...and any carbed setup on a third gen is getting enough fresh air in. I saw a test "back in the day" of the 305HO car showing how cfm limited the OE dual snorkel setup was. With the short air filter/cleaner required for the low hood clearance, you can't really get enough air through to make power. I made a 30HP difference on the dyno going from my single snorkel setup to an open element. This was in my 82 Z28 T-10 that was swapped to a 350, made ~275RWHP with open element, wouldn't break 250RWHP with the single snorkel even with a "flipped lid".

You said the dual snorkel setup is CFM limited, but then you are comparing an open element to a SINGLE snorkel setup. Can you explain further here? Are you sure the base and lid are the same between the dual and single snorkel setups?

The only dyno tests I had were between the single snorkel and the open element. I took it to the dyno with the single on it...and when it didn't make the power we wanted, we borrowed an open element to see what difference it would make. I eventually made my own dual snorkel from pieces of two singles... but the biggest difference was that the open element air cleaner was taller. They use the same filter on all 4bbl and TBI air cleaners. I do believe that the base is exactly the same. When I ran an open element on the street, it ran like a dog with all the hot air coming in.