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Old 11-23-2011, 10:39 AM   #183
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FWIW for future reference...registration in Montana is relatively easy, cheap, and I'm not aware of any smog restrictions...
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Old 11-23-2011, 11:39 AM   #184
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It's sad that the early airpumps were required to burn off excess fuel. The excess fuel (richer mixture) and lower compression ratio lower combustion temperatures. The lower combustion temperatures were required to reduce the NOx levels at the expense of performance and fuel economy. Removal of the smog equipment became common to get back to the performance and MPG of the origional 500 hp 454. The early 80 were the worst of the worst in smog equipment.

If it were my coach I'd retrofit the latest EFI 454 I could find into it. I realize that is beyound the scope of the average camper and most have to settle with restoring the origional smog gear to keep some bureaucrat with a clipboard and checklist happy.
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Old 11-23-2011, 01:52 PM   #185
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Agreed, Dakota.
Its not an ideal situation, but one Paula, I and others have to live with for the short term.
I actually have a complete engine, with TBI system in my storage from a 1990 Suburaban from exhausts, to air filter. Also have the Computer, and wiring harness. I could put that on if I want or need to.
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Old 11-23-2011, 03:44 PM   #186
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The Chevy techs told me that one reason that the 454's run so hot is because it was a way to lower emissions. Higher temps meant fewer unburnt hydrocarbons and the air pump worked better. Unfortunately it meant that MPG went down because the fuel was converted to heat energy instead of horsepower. "I'm from Washington and I'm here to help".
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Old 11-23-2011, 03:52 PM   #187
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My understanding is that the primary concern back in the 80 was NOx which is a product of high combustion temp/pressure. Air is injected into the heads and exhaust manifold to burn off the excess hydrocarbons. That causes a lot of extra heat that isn't doing anyone any good. Except those selling gas.
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Old 11-23-2011, 04:00 PM   #188
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I wish AS had better files, the folks we met in Cali (I don't think they're on the forum) had a 24, but it was a converted hearse, of which they told me, AS made a few of them. Maybe someone went out of the "last ride" biz and had yours converted to a conventional?
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Old 11-23-2011, 04:58 PM   #189
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I wish AS had better files, the folks we met in Cali (I don't think they're on the forum) had a 24, but it was a converted hearse, of which they told me, AS made a few of them. Maybe someone went out of the "last ride" biz and had yours converted to a conventional?
That's sorta creepy! I would think it would have had a big door somewhere.

http://www.viewrvs.com/a/airstream/1...4_hearse_b.php
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Old 11-23-2011, 05:11 PM   #190
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That's sorta creepy! I would think it would have had a big door somewhere.
It did, the whole stern opened-up in a big clamshell rear "exit" door.
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Old 11-23-2011, 10:35 PM   #191
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Don't think ours was a hearse

We have a molded shower in the rear bath......pretty sure it is original.....with the central vac and all.....doubt a hearse would have had that.....

will keep you posted on the smog saga....thanks for all the information.....p
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Old 11-25-2011, 08:05 PM   #192
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wondering, since my '89 has the TBI 454 motor, I'm still running at about 220 water temp. Doesn't seem like it's running hot though. Not sure about mileage, I'm still getting used to driving something that's 3 times larger than my daily driver. Took a neighbor's visiting family member out for a spin today after work. Guess I made a 'convert' to Airstream. His grin was even sillier looking than mine......
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Old 11-25-2011, 10:19 PM   #193
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Ours is a peanut

compared to your 34.5.......got a personalized plate....82 Ste P (1982 Suite P (for Paula).....Sweet P was taken as was Suite P but the 82 will tell everyone the year so that is really better anyway.....of course, I don't have her licensed other than the temp......but I am counting on it.....getting her smogged that is.....happy thanksgiving everyone. p
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Old 11-26-2011, 12:21 AM   #194
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Originally Posted by crazeevw View Post
wondering, since my '89 has the TBI 454 motor, I'm still running at about 220 water temp. Doesn't seem like it's running hot though. Not sure about mileage, I'm still getting used to driving something that's 3 times larger than my daily driver. Took a neighbor's visiting family member out for a spin today after work. Guess I made a 'convert' to Airstream. His grin was even sillier looking than mine......
Derek,

I used to worry that mine ran between 215 and 220, I noticed that my 2008 Silverado runs at the same temp. I also don't take these old gauges as gospel...if it doesn't smell hot, vapor lock when I stop, boil over, or is hard to start after I stop for a short break...it ain't too hot. From what I read here, and other places, it runs hot to help with emissions. Easy for me to say but I wouldn't worry.

Bill
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Old 11-27-2011, 02:03 PM   #195
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Hi Bill,
Thanks for responding. Always knew that stock gauges are unreliable at best. Just a generalization. Maybe one day I'll get rid of those and go with something better. Right now, I'd be happy with 9 new tires.....
Thanks, Derek
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Old 11-27-2011, 02:32 PM   #196
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You guys are right, the stock gauges were junk. I had my buddy measure the temp when we were north, 180 compared to my gauge at 210. Guess what gauge/sending unit gets replaced next?
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