All these posts about apten porting, extruded upper intakes, cleaning intercoolers. All trying to improve air flow and cfm. The more you can get in there faster the more HP right?

Well ponder this.
You do all this work and your sending all that air smack into a flat wall at the floor of the intake manifold. The air now has to go allmost 180 degrees in the opposite direction to get to where the intake valve inlet and injectors are.

I know it is pressurized under boost and all just waiting for the valve to open but heck flow is flow.

Has anyone thought about polishing the floor of the intake plenum or adding a guide plate to smooth and direct the air back up to the valve port?

Sorry if this is an old topic?

 

The floor of the manifold is not the problem, it is already shaped correctly. The problem is after the air turns the corner and starts moving back up along side the intercooler and then has to turn and enter the port........That is were the turbulence is.
Dale
PS....good question

 

I think alot of people, like myself just want to mildy mod our L's. And the porting and cleaning is all part of the big puzzle. Every little bit helps.

Gary

 

I would love to have been in the room when the engineering dept was arguing with the production and accounting dept about where to draw the line on refinements.

I like to keep tabs on the motorcycle industry because they have to work so hard for every hp they get with there smaller cubic inches. But then again they are allmost double the RPM.

Here is a much debated device that is very simple and some swear by. Others think it is a ripp off.

http://www.atvprice.com/shopping/powernow/power_now.htm

Would be nice to find something this simple that would improve flow. With all the dyno tunning we do it would be interesting to do back to back testing.