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Flexible piping for intake

 
Old 02-28-2018, 01:41 PM
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Default Flexible piping for intake

Hey guys, I'm working on trying to optimize AITs/cooling in my car and I'm curious how bad this would be for flow:




I'm running a low mount C30-74 rotrex and the intake piping is EXTREMELY close to the header. Currently to make everything fit I have a metal pipe next to the header. It's never gotten hot enough to burn me, but I'm sure that it's doing a great job of heating the charge pre-compressor. I was thinking the flexible piping would be better at insulating the intake air from the exhaust, and I may be able to route it a little bit further from the exhaust so I can put some decent heat shielding between them.


Here's another angle on the intake pipe. Right now the lower rad hose is being pinched as well. Flexible hose would allow me to make the weird compound curve around everything, but I'm concerned about killing the flow to the compressor... Anyone have any input/data on this?



****. Just had another thought, this stuff might just collapse from the pressure drop at WOT

Any ideas/input is appreciated.
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Old 02-28-2018, 03:31 PM
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i dont see a problem with your current setup. besides the sharp 90 degree bend, which i would replace with a metal 45 degree piece, it looks fine.
and i dont really see any way to not have the intake next to the hot header.

that rubber/plastic flexible piping will melt. but you can use metal/aliminum flex pipes, like the one's for clothes drying machines. just get the good ones with thick metal, not the aluminum foil kind.

i doubt it will decrease the intake temps though.
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Old 02-28-2018, 03:33 PM
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You're better off adding a heat shield and maybe wrap the intake pipe in a thermal barrier material. I know it's frowned upon and potentially has long-term issues, but you will likely benefit from wrapping your header as well.
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Old 02-28-2018, 03:38 PM
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Originally Posted by borka View Post
that rubber/plastic flexible piping will melt. but you can use metal/aliminum flex pipes, like the one's for clothes drying machines. just get the good ones with thick metal, not the aluminum foil kind.
i doubt it will decrease the intake temps though.
That flexible hose is rated to over 480 F, the silicone couplers that are on there now are only rated to 350. The whole point of using the flexible piping is using something that won't conduct as much heat as metal. I also don't know which bend you're talking about. The bend off of the compressor has to be a 90, and then the other 90 is needed to bring the piping to a reasonable area for the filter. I may be able to use a 45 on the top of the pipe, but I'd consider that a relatively minor improvement.

My main concern is that I hit AITs of nearly 100 when it was barely 30 outside. Currently the intake is so close to the header that if I put a shield on it one of the two will likely be making contact. right now my finger doesn't even fit between the two.

I guess for now I'll double down on my ducting to the IC. I just want to consider all of the places I can make an improvement before I start making changes.
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Old 02-28-2018, 04:06 PM
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Wrap things and make heat shields. 70 over ambient will suck in the summer.
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Old 02-28-2018, 04:47 PM
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Originally Posted by ryansmoneypit View Post
Wrap things and make heat shields. 70 over ambient will suck in the summer.
Hopefully this and some more ducting will bring things back in line. Otherwise I may be running a really low redline for track...
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Old 02-28-2018, 04:54 PM
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VENT THAT HOOD OVER THE HEADER
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Old 02-28-2018, 04:56 PM
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Originally Posted by ryansmoneypit View Post
VENT THAT HOOD OVER THE HEADER
I'm pretty sure I have that taken care of

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Old 02-28-2018, 10:36 PM
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Nice
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Old 02-28-2018, 11:03 PM
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Wrap the header pipe that is closest to the intake piping, and squeeze a big heat shield covering the whole area in between that. even though stuff is contacting eachother, the wrap on the header will be an insulator, and heat shields need an insulator (usually air) to be effective.
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Old 02-28-2018, 11:51 PM
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I wonder how a rb header would make the fitment better
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Old 03-01-2018, 06:10 AM
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It's your intercooler setup that's most likely driving the high IAT's. Do you have sealed ducting on the inlet at least?
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Old 03-01-2018, 12:10 PM
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Originally Posted by Twibs415 View Post
I wonder how a rb header would make the fitment better
From what I have seen, it should be better, but I don't want to put a RB on a 1.6 (waste of $$). I'll buy one when I go 1.8

Originally Posted by Bronson M View Post
It's your intercooler setup that's most likely driving the high IAT's. Do you have sealed ducting on the inlet at least?
The inlet is not 100% sealed, but is pretty decent right now (LRB undertray). Linclonlogs is running the same intercooler setup and his intake temps are way more reasonable than mine. His charge piping is further from the exhaust (different SC mounting location) and he likely has better ducting. I'm gonna do a bunch of finishing duct work and see how that plays out. IATs drop fast out of boost, but I'd like them to stay down...
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