Right now I have my air filter using 90* slow bend of PVC pipe. Im just wondering if its ok to put a short STRAIGHT ram air tube as far forward as possible until I hit the battery and the windsheilf washer fluid. Is straight bad? I do not have an MAF screen. I will also probably be closing off the filter with some plexiglass or some insulation.

Straight is good, Curve is bad.

are you using one of those Accel Kool Blue pipe things, or is it custom made?

PVC is bad for heat soak. I'd try to find something metal, then insulate. Are you talking about straight between the TB and the 90* bend? That'll be good for flow for sure.

what is heat soak? :?:

how much a substance absorbs heat. PVC will be harder to change the heat of than a pipe. If he had PVC and insulated it he would probably be fine.

when I had my pvc pipe it did not get nearly as hot as the metal pipe now. but i also sanded it down then painted it with hi temp paint, so maybe that did something?

i think plastic has a higher specific heat than most metals, so it will take more energy to heat it, though it will stay heated for a longer period of time.