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Topic: DIY roof cold air intake (Read 1208 times) previous topic - next topic

DIY roof cold air intake

Saw this photo today on FB group,
  Age 50 and over rvers. Mebbe trying to limp her home?
Tom Shannon
Ham Radio W7OT
1996 u295 (SOLD)
2007 Kia Spectra Ex 5spd (kiki)
Now in Apt

Re: DIY roof cold air intake

Reply #1
I think this is someone who thinks this will help to keep his rig from overheating when climbing mountains.
Bob & Kathy
2007 Nimbus
Full Timers
Retired Charter Bus Owner/Operator

Re: DIY roof cold air intake

Reply #2
Snorkel for high water crossings?

Re: DIY roof cold air intake

Reply #3
Imagine the water you could scoop in off the roof in a rain storm.
Brett Wolfe
EX: 1993 U240
Moderator, ForeForum 2001-
Moderator Diesel RV Club 2002-
Moderator, FMCA Forum 2009-2020
Chairman FMCA Technical Advisory Committee 2011-2020

Re: DIY roof cold air intake

Reply #4
Somewhere here on the forum long ago there was a member that did something similar. It was a ram air system. There is even pics IIRC. I don't remember the amount of HP he claimed it increased his engine though.

Mike
Pamela & Mike 97 U 320

"It's not what happens to you, but how you react to it that matters."

Re: DIY roof cold air intake

Reply #5
As long as you don't have a restriction (high air filter minder reading), with a turbo engine, can't see it making that much difference.

Said another way, it is the turbo's job to "make air". If engine manufacturers specs show the same HP at 8,000' as at sea-level, doubt a "ram air system" would change intake manifold pressure (air).

Normally aspirated engines are another matter, but that is not what we have.

Would also be interesting to compare intake manifold temperatures before/after modification.  With the CAC doing this "air cooling thing" for a living, wonder if the main affect is a "feel good" vs mechanical advantage.
Brett Wolfe
EX: 1993 U240
Moderator, ForeForum 2001-
Moderator Diesel RV Club 2002-
Moderator, FMCA Forum 2009-2020
Chairman FMCA Technical Advisory Committee 2011-2020

Re: DIY roof cold air intake

Reply #6
wonder if the main affect is a "feel good" vs mechanical advantage.

Not to run down a member as to what they did but I agree.  Someone with a lot of time can find the old post and bring it back up so the newer members can see if it can help them out.

Mike
Pamela & Mike 97 U 320

"It's not what happens to you, but how you react to it that matters."

Re: DIY roof cold air intake

Reply #7
It is used for water injection during in-climate weather.
John
John and Stacey Smith
Motorcade NO: 11973
1997 U295 CSGI 40'..Build No. 5036     
920 Watts on the roof..CAT Power w/fuel Inj. Programmer
2021 GMC Sierra AT4 1500
EX..2015 Jeep Wrangler Sahara
Ex 1990 U280 RSAI 36'..Build No. 3638


Re: DIY roof cold air intake

Reply #9
Turbo turd shooter for tailgaters (gotta clear the towed, you know) :))
Nitehawk,  Demolition Lady, & our NEW master, Zippy the speeding BB cat.
1989 Grand Villa 36' ORED
Oshkosh chassis, 8.2 DD V8
2006 Saturn Vue AWD

 

Re: DIY roof cold air intake

Reply #10
Colder denser air would make a difference, if it's sucking hot Engine bay air for some reason. Had a t-bird turbo coupe and when it was in the teens or lower hot damn.
Old Phart Phred, EIEIO
89 GV ored 36' #3405 300 hp cat 3208 ATAAC side radiator, mountain tamer exhaust brake