I have a 1991 Camaro with a 355ci Super rammed, LT-4 hot cammed, etc. engine (Most of you know the rundown)and noticed the other day that the rubber hose/duct collapses when I rev the throttle. I have K&N filters and "ram air" boxes by Dwayne, it seems as though it should breath well enough to not be sucking the hose shut. Any advice on how to fix the situation? I will not mount a K&N directly to the throttle body, and don't wish to fab up some type of pipe over next to the battery, I would rather keep the factory intake location. Has this happened to any of you? Thanks in advance!

 

You may have plugged the K&N and need to clean it. I think Kevin is running one of Dwayne's ram air boxes, and the down side to them is that the stock air box makes the air change direction and dumps some of the debris that gets sucked in. Dwayne's boxes don't change the direction of airflow, so everything goes to the filter. I think Don told me that Kevin was cleaning his K&Ns weekly.

 

"Listen to the man" he's right.( K&N might be great for some but don't get me started)
You are pulling so much air in it can't get through those filters. That causes a vacuum that sucks the rubber hose in.

Don>>>

 

I donno if I should give away 1 of Kevins racing tips on this one. But Don told me a story about the K&N.. He should rem. =) Don sha'll ya give away your secret.

 

You could always make a reinforcement similar to the spring inside the radiator hoses out of wire coat hangers.

 

I wonder what it be like to borrow your brain for a week hehe.

 

Its no secret. Everyone knows I pull the K&N air filters at the track, and its worth anywhere from 0.5 MPH to 2.0 MPH every time.

Jason, I've never noticed my air box doing that...
Sorry I cant help.

 

my first thought would be to get more hose....like that of a radiator hose and more of the hose you are using now....

augment the two where the radiator hose (a much thicker hose less likely to collapse even under sever vacuum)is in the center like so:
...._____________
====_____________====
............^
............^ this is thicker hose......which will withstand higher vacuum pressures

or get just thicker hose period with similar diameter hole....so that it may fit with no or minimal augmentation with your airbox/TB

 

The answer is not to get a stronger hose, or reinforce the existing hose. The engine is trying to breath, but it is suffocating from a plugged up filter. It needs to get air into the engine, not a bigger space for vaccuum.