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Old 09-06-2015, 06:10 AM   #41
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1982 31' Airstream 310
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Quote:
Originally Posted by nrgtrakr View Post
Really dumb question ...
why not a diesel?
7.3/7.4 or 8.2?
I looked into a diesel replacement. The motors were really expensive, even with high mileage used motors. It would have dramatically increased the time required for the swap to custom fit everything. I would need to add a second fuel tank or switch the generator over to propane. As Hans said, I would have probably needed to change the rear end gearing to get into the correct RPM range for a diesel. I felt it was too much work, too expensive and would keep me away from enjoying camping trips for too long to justify the gains in fuel economy and torque. This was a big enough project with a direct bolt in replacement!
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Old 09-06-2015, 07:37 AM   #42
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Edelbrock 650

Quote:
Originally Posted by Hans 34.5 View Post
I think the Quadrajet is not going to give you the fuel needed as it is.
Your going from what was it 280 hp to 450. You may know all this.
Keep a eye on the plug color. It's going to be a fun MO to drive.
I'm running an Edelbrock 650 cfm on a 327 cui and it makes my pickup truck scream. It might be a tab bit to much but for the cam, heads, and intake combo it works well. The new aluminum heads greatly reduced the weight from the cast iron heads. IHMO, I'd stick with the stock exhaust manifolds. Less chance of warping and having to replace manifold exhaust gaskets.
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Old 09-07-2015, 07:03 AM   #43
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Beautiful!!! Is that the first 502 anybody has heard of being installed in a classic? Wish you the best of luck through the rest of the install!!

Mike
Check this full monty with a 502 on a Classic moho. I don't know who he is or if he's on the forums site. Well dressed with a few toys.

There's a link to a fourth section as well at the end of the final movie.





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Old 09-07-2015, 07:30 PM   #44
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Wow. I thought I was in deep!


1982 310 motorhome 454
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Old 09-08-2015, 06:51 PM   #45
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Does anyone have photos of the inner fenders on the front of their motorhome? I assume they should be closed in to improve airflow through the radiator and over the motor. My left side has an aluminum panel with a cutout to access the master cylinder from the wheel well. The panel blocks about 2/3 of the left wheel well, the rear 1/3 is open. The right side is completely open with no sign of mounting brackets that would indicate there used to be a panel there. I will probably build something to close that area off, it would be great to get some pictures to see what it should look like.
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Old 09-08-2015, 07:28 PM   #46
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Passenger side, made out of thin aluminum. I will take that panel off in a week from Saturday and could give you the dimensions. It appears to be made from trailer underbelly material
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Old 09-08-2015, 07:29 PM   #47
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drivers side made out of steel with master cyl access
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Old 09-09-2015, 08:21 AM   #48
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Thanks for the photos. My drivers side panel looks the same. I will have to build a passengers side panel. I can see the bolts along the top edge of yours, but I don't see any signs of a bracket to bolt to on mine. Guess I will be starting from scratch. If you have it off and can get measurements, I would appreciate it.
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Old 09-10-2015, 05:01 PM   #49
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Another photo to help you out Chiefair...
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Old 09-11-2015, 11:49 AM   #50
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Thanks for the photo. Interesting how different these two panels are. I found this on the web: http://truckroadservice.com/barth_at...2015983041.pdf. Just have to decide how fancy I am going to get.
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Old 09-11-2015, 12:09 PM   #51
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I like this panel.

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Originally Posted by chiefair View Post
Thanks for the photo. Interesting how different these two panels are. I found this on the web: http://truckroadservice.com/barth_at...2015983041.pdf. Just have to decide how fancy I am going to get.
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Old 09-13-2015, 06:13 PM   #52
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Finally started the 502 for the first time today! The excitement was short lived. The fuel line adapter I bought for the Holley has a bad flare and leaks fuel continually. Back to the speed shop on Monday for a replacement.


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Old 09-15-2015, 10:06 AM   #53
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Finally started the 502 for the first time today! The excitement was short lived. The fuel line adapter I bought for the Holley has a bad flare and leaks fuel continually. Back to the speed shop on Monday for a replacement.


1982 310 motorhome 454
Henniker New Hampshire
Sounds like your startup went better than my Argosy 454 startup did. After about 5 minutes of running a couple of my spark plug cables caught on fire and and melted!

Melted plug wire video at post #53
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Old 09-15-2015, 06:07 PM   #54
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Brad; not being mechanically I take it that the spark plug wires are not supposed to catch on fire?


Sent from my iPhone using Airstream Forums
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Old 09-15-2015, 06:35 PM   #55
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I am now waiting for the arrival of my 3rd fuel line adaptor. First two leaked on the flare. Still plenty of opportunity for a fire here!


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Old 09-15-2015, 06:41 PM   #56
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I built a cardboard template of the GM inner fender I found on the Barth website. It was nice but the frame mounting points were not going to be fun to get to. I made a new template based on the GM one but attached to the body like the photos that folks here provided. I'm pretty happy with the way it worked out. 
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Old 09-15-2015, 09:50 PM   #57
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Chief....Are you and Brad kin? The both of you should start up a shop together.

Cheers
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Old 09-16-2015, 05:39 AM   #58
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That's pretty high praise. I suspect Brad has forgotten more about these motor homes than I have learned in the year I have owned this one.


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Old 09-16-2015, 09:08 AM   #59
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That's pretty high praise. I suspect Brad has forgotten more about these motor homes than I have learned in the year I have owned this one.


1982 310 motorhome 454
Henniker New Hampshire
Wow! I didn't realize y'all could be so easily duped

Reminds me of the old W.C. Fields quote "If you can't dazzle them with brilliance, baffle them with bullshit."

I will say this, there is at least one major difference between Chiefair and myself. He actually seems to get stuff done. Most of my projects are just that, projects.

With all that being said thank you for the compliments

Brad
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Old 09-16-2015, 08:06 PM   #60
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Drove it down the road tonight! No grill or hood, doghouse off, but it does run and drive. Need to make a few adjustments but should be back in business by the end of the weekend.


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