So where does the heat go?

 

My guess is that it would stay in the exhaust itself, which is where it belongs. That is, if your turbo can handle it...

 

Good Point...Can the turbo handle the extra heat if in fact it stays in the gas? I have read on other manufacturers' claims (vishnu) that theirs will actually lower the EGT. Is it because there is an increase in velocity of exhaust and the heat is carried away quicker or because the other pips radiate the heat out...? Sooo many questions...sorry.

 

It does not increase EGTs and the turbo can handle it. There are hundreds in service with no heat related turbo failures. In fact, no turbo failures have been reported.

 

helix and will be gettign the pair of dp up soon

 

+1 helix flex

 

Flex joints disrupt exhaust flow.

 

I think removeing the cat in the upipe is what lowers egt's since cats are restrictive. When you have a catless upipe the exhaust gasses are able to flow away from the cylinders faster which decreases egt temps at the cylinders. I'm not sure but I would think the exhaust gasses entering the turbo would be cooler with a catless upipe since there isnt a hot a$$ cat in frount of it but dont quote me on that.

With a catless upipe you have a 0% chance of a piece of the cat breaking off and trashing your turbo so I would think a catless upipe is much safer than the oem one especially if your car is modded.

When you have a coated upipe it will help keep heat out of the engine bay and in the pipe. Since heat will help to increase velosity it should also help spool up, how much I dont know.

 

I'm almost positive #3 (passanger rear) is the closest cylinder to the upipe and I doubt the lack of a heat shield would cause any problems with that cylinder. If you are thinking about buying an upipe and you are still concerned about the heat issue buy a STI upipe since it has a heat shield. If you plan on doing a DP Speedmonkee has a heat shield with a chimney that is prety cool http://www.speedmonkee.com/.

 

Number 3 is right next to the uppipe, you're right. The rest is BS.

 

Before you pick an up-pipe you might want to consider that some companies package an up-pipe with their Turbo Manifolds. Gt-Spec, Fujitsubo and i think Invidia all have an up-pipe packaged. I got the Fujitsubo with my manifold. Havent put it on yet but it has a flex pipe and an o2 sensor bung. Also i dont know for sure but maybe someone else does. If you get some kind of engine management can you replace the O2 sensor with an EGT probe? Just curious. But shop around before you buy just the up-pipe.

 

misterx

The rest of what is BS? I'm guessing you're talking about the heat from an upipe causeing problems with cylinder 3.

Do you know if the coating on the crucial pipe lowers temps more than a pipe that has a heatshield?

 

I don't have figures on that, but as the pipe is coated on both sides I suspect lower temps.

 

Suspect? Thats a little thin. Can you explain why it being coated on both sides would make lower temps?

My reasoning is, the heat has to go somewhere. If it does not radiate out of the pipe, then that eliminates that option. Where does the heat go? If it's coated on the inside, then the pipe metal must not take much heat relatively, so then that eliminates that option. Where else is there for the heat to go? The cat is gone so there is no more static heat sitting around there. So we know that that makes the exhaust velocity increase since there is less restriction, well maybe not increase as much as it allows the exhaust to reach a fast velocity quicker. But at full boost and high rpms, the exhaust can only go so fast out of the pipe so there's where my concers are. Does the heat flow away better with the exhaust since heat does make for more velocity?

Can we get the makers of the pipe (crucial) to help us answer some of these questions?