Foretravel Owners' Forum

Foretravel Motorhome Forums => Foretravel Discussions => Topic started by: Saltfevr on November 10, 2017, 11:45:52 am

Title: DIY roof cold air intake
Post by: Saltfevr on November 10, 2017, 11:45:52 am
Saw this photo today on FB group,
  Age 50 and over rvers. Mebbe trying to limp her home?
Title: Re: DIY roof cold air intake
Post by: bobnkathy on November 10, 2017, 12:26:02 pm
I think this is someone who thinks this will help to keep his rig from overheating when climbing mountains.
Title: Re: DIY roof cold air intake
Post by: bdale on November 10, 2017, 12:49:02 pm
Snorkel for high water crossings?
Title: Re: DIY roof cold air intake
Post by: wolfe10 on November 10, 2017, 12:59:34 pm
Imagine the water you could scoop in off the roof in a rain storm.
Title: Re: DIY roof cold air intake
Post by: Pamela & Mike on November 10, 2017, 03:48:32 pm
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
Title: Re: DIY roof cold air intake
Post by: wolfe10 on November 10, 2017, 03:56:11 pm
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.
Title: Re: DIY roof cold air intake
Post by: Pamela & Mike on November 10, 2017, 04:01:08 pm
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
Title: Re: DIY roof cold air intake
Post by: John and Stacey on November 10, 2017, 04:19:26 pm
It is used for water injection during in-climate weather.
John
Title: Re: DIY roof cold air intake
Post by: Pamela & Mike on November 10, 2017, 07:09:27 pm
Here you go for those who ask, follow this link and look through the installation.  It also has a how to write up if you do a search.

http://www.foreforums.com/index.php?action=media;sa=item;in=559#viewitem

Mike
Title: Re: DIY roof cold air intake
Post by: nitehawk on November 10, 2017, 07:43:17 pm
Turbo turd shooter for tailgaters (gotta clear the towed, you know) :))
Title: Re: DIY roof cold air intake
Post by: Old phart phred on November 10, 2017, 08:26:15 pm
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.