Throttle Body Airflow

[ukchris]

Car has Jenvey ITBs installed, I'm curious about airflow and its importance. As it stands there is a plastic cover over them, the entry at the left has a foam filter in it and basically juist points forward. While I'm no expert I was under the impression that good airflow is important, isn't this likely to impede the flow or is the entry point forward going to increase it? I have a set of little foam hats for the ITBs too, curious as to the pros and cons of the plastic shroud vs. individual foam "hats" if anyone has any thoughts to share.

 

http://www.usa7s.net/vb/attachment.php?attachmentid=13976&stc=1

[Dave W]

Foam filters are NOT very effective and a lot more restrictive when compared to your cotton filters. I would suggest that you add a short extension so you can pit up cold air in front of the rad and add a cotton filter. Dave W

[ukchris]

Thanks Dave, inside the entry there is a foam filter, are you suggesting removing it for cotton, I suppose even before extending it?

 

are the cotton filters anparticular “thing”? For example I have pool filter socks which are designed to catch cunnks prior to the filter, or am I looking for a specific fabric filter?

[Dave W]

You can not go wrong with a K&N cotton filter. They will last a life time and will flow about 50% more then a foam filter. I would look into locating the filter so it can draw in cold air, or fab a cold air box that ducts in cold air, if you can not extend the air intake tube forward so it is in front of the rad. Adding a cold air box on my Seven made a noticeable improvement. DaveW