Journey with Confidence RV GPS App RV Trip Planner RV LIFE Campground Reviews RV Maintenance Take a Speed Test Free 7 Day Trial ×

Thread Tools Search this Thread Display Modes
Old 08-07-2017, 07:06 PM   #1
propstrike's Avatar
1981 28' Airstream 280
Pierre , South Dakota
Join Date: Nov 2003
Posts: 64
Dog too big for the House

With the 502, the doghouse bumps the air cleaner. ARGH!

It's been a long and winding road, but true to it's soul, this project is still throwing me challenges to overcome. Worst part is trying to fix the issues, long distance. The Vegas diesel shop that is doing most of the work is as frustrated with me as I am with them. A big truck shop, lowering itself to work on my gasser. I'm sure they're a good group of mechs, but they like the bigger stuff.

So, now that the engine is in, the new fuel tank and pumps are in, and it's got about 1/2 mile drive time on it, they tried to close the doghouse. Clunk. The air cleaner held the dog house up by 1/2 inch.

Any pics out there, of the doghouse uncovered? Anyone recover, rebuild or otherwise tear apart their doghouse, and have the pics to share? I'm looking to modify, by about an inch, the top of the cover. Since it's hinged, raising the whole thing won't work, right? If I can prep even a temporary fix, just to get it home, would work. Once it's here, I plan to weld up a new doghouse cage and cover plates. Maybe I'll cut a hole on top for the carb, and install an intake trumpet, set right between the two front seats! LOL!!!! I could put cup holders on each side of it !

I've looked at going with a shorter intake manifold. The only one that shaves off an inch of deck height is a single plenum set up, not meant for lower RPM work. The single deck works best for the high RPM/high flow big blocks??? Not suitable for the low RPM/high torque of the HT-502.

The Holley carb is probably not any taller than other carb models. The air cleaner is a pancake style, not much to shave off, there.

So close to driving it away.... straight to the Airstream shop, for new front spring replacements. Wanna get rid of the front airbags. The rears will be shot, too. They know I'm coming, get their parts sourcing guy warmed up! Ball joints, rod ends, brakes, too. Kills me to pay someone else to do those things, but I'm not going over the Sierra Nevadas until I know I stop, coming down the other side.

Then it's north, to the new place in South Dakota. Where I can start tackling the rest.

So... any pics of a doghouse, or other words of wisdom to lower the air cleaner by an inch, would be greatly appreciated!!

propstrike is offline   Reply With Quote
Old 08-07-2017, 08:11 PM   #2
Rivet Master
weirdstuff's Avatar
2018 23' International
Currently Looking...
Join Date: Oct 2013
Posts: 1,209
I guess you're talking about something technical. HOWEVER...I clicked on this thread, hoping to see photos of a really really large, cute dog!!
weirdstuff is offline   Reply With Quote
Old 08-07-2017, 08:47 PM   #3
Rivet Master
1989 34.5' Airstream 345
Ebro , Fla Panhandle
Join Date: Jul 2013
Posts: 1,212
I wonder if you can find a snorkel to put on top of the carb to move the air cleaner to the side or front somewhere there is more room for it.

Interested in performance report on the new big dog.

Cheers Richard
tevake is offline   Reply With Quote
Old 08-07-2017, 10:11 PM   #4
Rivet Master
PKI's Avatar
Currently Looking...
Walnut Creek , California
Join Date: May 2015
Posts: 3,951
Agree - snorkel - low profile custom aluminum fabricated air transition on carb - oval tube and flex hose to air box with high quality paper filter to clean the air.

Temp system will work until you can configure an efficient configuration that looks good. Take care to not create a backfire hazard with your assembly.

Good luck - Pat
PKI is offline   Reply With Quote
Old 08-07-2017, 11:25 PM   #5
Rivet Master
Currently Looking...
Mantua , Ohio
Join Date: Jul 2005
Posts: 7,062
Blog Entries: 2
What's a 502?
xrvr is offline   Reply With Quote
Old 08-08-2017, 12:40 AM   #6
Rivet Master
2014 20' Flying Cloud
Sag Harbor , New York
Join Date: Jun 2015
Posts: 17,538
Probably the motorhome's engine size?

OTRA15 is offline   Reply With Quote
Old 08-08-2017, 01:53 AM   #7
Keen amature
martin300662's Avatar

1975 20' Argosy 20
Chestfield , Kent
Join Date: Mar 2014
Posts: 3,477
Take a look at Brad's Argosy thread that shows his install of a snorkel/remote air filter, but also Chiefair's thread on his 502 swap.

But a word of advice from someone that has gone through this....your motorhome is a truck, anything mechanical go to a Chevy truck shop, the Airstream guys will know nothing about motorhome mechanicals asking them to work on suspension/steering worse than asking a regular auto shop.
martin300662 is offline   Reply With Quote
Old 08-08-2017, 07:49 AM   #8
Rivet Master
bkahler's Avatar

1974 20' Argosy 20
Richmond , Kentucky
Join Date: Jan 2003
Posts: 9,044
Like Martin said, take a look at my rebuild thread starting at post # 860. I totally rebuilt my doghouse from the floor up.

To get you by you might be able to use a low profile air plenum. I have it's taller brother on my 454. You'll need to add the intake hose and remote filter and you can see examples of that as well in my thread.

Good luck!

Air forums # 1674
1974 20' Argosy Motor Home
1975 24' Argosy Motor Home
1974 31' Excella trailer (parting out, as of 4/1/2015 I have wheels & windows left to sell)
bkahler is offline   Reply With Quote
Old 08-08-2017, 08:35 AM   #9
Rivet Master
Mollysdad's Avatar

2017 26' Flying Cloud
Tampa , Florida
Join Date: Feb 2017
Posts: 7,138
Blog Entries: 1
How about a lower profile air cleaner, like used on street rods?
Attached Thumbnails
Click image for larger version

Name:	0e2a688b1d79f3e4fc91ee1f3bb624f9.jpg
Views:	757
Size:	93.3 KB
ID:	291649  
Attached Images
Mollysdad is offline   Reply With Quote
Old 08-08-2017, 07:17 PM   #10
2 Rivet Member
2007 25' Safari
Attleboro , Massachusetts
Join Date: Aug 2011
Posts: 70
different height air cleaners are available from stock car racing suppliers like or you were closer I have a carton full of different size air cleaner housings and filters
romeb is offline   Reply With Quote
Old 08-10-2017, 10:18 PM   #11
3 Rivet Member
1969 31' Sovereign
1982 28' Airstream 280
Edmonton , Alberta
Join Date: Dec 2016
Posts: 190
Take to a welding shop down the road have a bump up installed half a day of shop rate it's $20 of material Change it when you get home or plan a nice bump up and pay for a couple hrs extra. Buying different carbs, intakes or other stuff I'd think would be more.

I have friends that are welders that could get that done in an hr
Swillv8 is offline   Reply With Quote

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

Similar Threads
Thread Thread Starter Forum Replies Last Post
Either the AS is too big or the TV is too small Jim Lee On The Road... 18 12-07-2014 08:21 AM
How big is too big? unit13 All Argosy Trailers 3 05-16-2011 09:28 AM
How big is too big? Newbie Ponderings... mattlyon Our Community 22 08-15-2010 08:32 PM

Featured Campgrounds

Reviews provided by


This website is not affiliated with or endorsed by the Airstream, Inc. or any of its affiliates. Airstream is a registered trademark of Airstream Inc. All rights reserved. Airstream trademark used under license to Social Knowledge LLC.

All times are GMT -6. The time now is 09:36 AM.

Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2023, Jelsoft Enterprises Ltd.