a dumb question, but i'm a newb to engines....

pyistazty · Post by **pyistazty** » Tue Jul 21, 2009 5:27 pm

my intake manifold....now, is that fucker plastic, or is that just a heat shield?

that an old picture of the engine btw, just most recent, hah...

Post by **racer12306** » Tue Jul 21, 2009 5:27 pm

yes it is plastic.

pyistazty · Post by **pyistazty** » Tue Jul 21, 2009 5:34 pm

thought so.../facepalm

Adionik · Post by **Adionik** » Tue Jul 21, 2009 5:38 pm

Our header is also plastic...

Post by **racer12306** » Tue Jul 21, 2009 5:39 pm

nothing wrong with the intake manifold being plastic

Danteneon · Post by **Danteneon** » Tue Jul 21, 2009 5:44 pm

Unless you want to port them

Post by **occasional demons** » Tue Jul 21, 2009 5:46 pm

Adionik wrote:Our header is also plastic...

Plastic = less thermal conductivity. Plastic = less weight. Plastic = good. For IM's anyways.

Post by **occasional demons** » Tue Jul 21, 2009 5:49 pm

Well, yes porting them may be a problem. But they do have a slight advantage of being "polished" from the factory. I haven't seen many cast IM's as smooth as the runners in a 2.0 plastic IM.

Adionik · Post by **Adionik** » Tue Jul 21, 2009 5:58 pm

Pretty hard to port match the IM to the head though...on a plastic manifold

I'm surprised they used plastic. Even shitty Hondas have cast manifolds.

esteinmaier · Post by **esteinmaier** » Tue Jul 21, 2009 6:15 pm

The plastic actually works pretty well, although they blow up at 28psi.

Post by **occasional demons** » Tue Jul 21, 2009 6:17 pm

Would that be a 1gn or 2gn IM?

Somehow, I can almost see a 1gn holding more boost.

esteinmaier · Post by **esteinmaier** » Tue Jul 21, 2009 6:21 pm

That's the pieces I could find. Grrtrude's stock manifold.

Post by **occasional demons** » Tue Jul 21, 2009 6:29 pm

Sweet Carnage!

I could see a 1gn plenum moving into the radiator, from the runners straightening before they cracked. (If the bottom brace wasn't attached.) But that's just my twisted imagination.