Straightened out my intake tubing

BlackVert said:

please believe me when i say i am not trying to be a jerk, but it seems obvious to me that the air will definately be hotter after going through a hot metal pipe than it would be going through a PVC pipe that does not get as hot.

can we agree about that?

to determine the difference, one would have to move the IAT sensor as close as possible to the throttle body on both the metal and PVC pipes and run some datalogs. i don't know if anyone has done that, but i'd be interested to see the results.

Click to expand...

I'm betting any factory IAT sensor isn't going to be anywhere sensitive, or accurate enough to pick up any temperature variances what so ever.

In theory it sounds good. PVC doesn't absorb as much heat as say aluminum, or steel, but....

It still does absorb a fair amount of heat, which does get transferred to the inside of the pipe and into the incoming air charge. Even if there's a 30-degree or so difference between the outside surface temperatures of the pipes, that doesn't mean it's going to translate into any measurable difference to the air temperature inside.

These were also the findings my dyno tuner had over years and years of back to back tuning on various combinations. I had the same concern when I built the intake pipe out of 3" and 4" mild steel exhaust tubing on my Cougar.

He told me strait out....."The time the air spends, inside that 14-inches or so of intake pipe is a fraction of a second at best. That's not enough saturation time to se any measurable change in air temperatures. You'll see better gains drawing the air from inside the fender and straitening the shot into the MAF meter (reducing the turbulance of the incoming air stream) than you would changing the intake pipe material."