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Old 01-06-2006, 06:24 PM   #1
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Question Air Pump Disconnection

I am wondering if I can disconnect the air pumps on my 1989 370LE. It has a Ford 460 engine, and there is a single belt that does nothing but drive the two pumps. Has anyone else done that? Is there any problem with taking the belt off if all it does is run the pumps? I've heard of people disconnecting air pumps, but have never done so personally. It does seem it would give the engine a slight amount of relief, however small, but I don't want to do anything to mess up the engine performance either. Looking for some of you who may have experience with this.

Thanks,

Tim
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Old 01-06-2006, 06:46 PM   #2
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Tim. They are an important part of the emission system and without them it might mess up your fuel system and you will not pass an emission inspection.
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Old 01-06-2006, 06:55 PM   #3
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Originally Posted by Nye Thatcher
Tim. They are an important part of the emission system and without them it might mess up your fuel system and you will not pass an emission inspection.
Nye,

We don't have emission inspections in Virginia except to visually see if catalytic converters are there (my MoHo never had any), and that one doesn't have dual exhaust unless the vehicle was originally equipped with that (of course, mine did). I'm not trying to pollute any worse, however. Just curious, what type of trouble might I get with the fuel system? My coach is a carbed Ford 460 - very primitive by modern standards. No fuel injection, electronics (except ignition), nor most of the other engine controls on newer vehicles. Also, has no catalytic converters, since it was exempt at the time of manufacture. Again, I'm not trying to mess up the environment any further, and I certainly don't want to mess up the fuel system. What kind of problems will disconnecting cause?

Thanks for the help,

Tim
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Old 01-06-2006, 07:11 PM   #4
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Tim,
I've did it on my 454 when I replaced the exhaust with headers. Here is a link you might find useful: http://www.airforums.com/forum...s-19876-3.html

The only changes were improved performance and better mileage. I rebuilt the carb around the same time (to stock) and saw only improvements.
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Old 01-06-2006, 07:43 PM   #5
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Originally Posted by swebster
Tim,
I've did it on my 454 when I replaced the exhaust with headers. Here is a link you might find useful: http://www.airforums.com/forum...s-19876-3.html

The only changes were improved performance and better mileage. I rebuilt the carb around the same time (to stock) and saw only improvements.
In your link are you saying you took off all the tubing that seems to run all over the place, including two hoses that go into the air cleaner housing? If so, did you blank all the resulting holes, and if you did, how did you do that? Would I accomplish the same result if I left everything where it is and just disconnected the pumps from their drive belts? I'd really like to get some of that heat out of there, especially since there really is no serious attempt with these older classics to control pollution. My exhaust manifolds (stock Ford) have been redone (broken bolts - new gaskets) at least twice since 2001, and I have only 16,000 miles for the entire 17 year life of the vehicle. I looked at after market headers, but my engine compartment is too narrow. Apparently, the 370 with the Ford 460 is a little tighter than the ones with Chevy engines.

Tim
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Old 01-06-2006, 08:33 PM   #6
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Well I'm not familiar with the AIR system on the Fords. I think disconnecting them will give you a little less resistance on the accessories, but the real benefit for me came when I removed all of that "junk" from the exhaust ports.

I took out all of the tubing. I only had one 1" opening on side the air cleaner (outside of the element) so I just left it open. I suppose I would probably pop rivet some sheet stock in there if it bothered me.

I really wanted to clean up the engine (it looks more like a muscle car engine now - basic with a big old carb on it) and less that engine breath.

BTW - It's hard to image less clearance in there.
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Old 01-06-2006, 08:59 PM   #7
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(Quote)BTW - It's hard to image less clearance in there.__________________
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I agree absolutely! I dropped a portable phone from inside my coach today while I had the dog house cover off. Amazingly, it actually made it to the ground . I had earlier dropped a much smaller fuel filter box in there, and couldn't find it for two days.

Tim
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Old 01-08-2006, 09:40 PM   #8
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Amazingly, it actually made it to the ground
Tim
It's worse when it doesn't make it through. I spent about twenty minutes once looking for a 9/16" open end wrench once only to find it sitting in the front frame crossmember. I still can't figure out how it got there!
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Old 01-09-2006, 07:13 AM   #9
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Tim, see my post http://www.airforums.com/forum...air-18943.html
If you're concerned about doghouse temps you can use the mod that Clubmaxx did on his coach, not an AS. He used ducted hose from the area in front of the rad. His main concern was to cool the starter. Positive ventalation is a good thing.
Giving the engine more to breathe is a great way to boost power. More air better combustion.
Like Stephen said I'm not a Ford guy either. How much intake air capacity do you have. Chevy's with the single horn aircleaner intake just cry out for this easy to make mod.
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Old 01-09-2006, 11:36 AM   #10
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Originally Posted by GlenCoombe
Tim, see my post http://www.airforums.com/forum...air-18943.html
If you're concerned about doghouse temps you can use the mod that Clubmaxx did on his coach, not an AS. He used ducted hose from the area in front of the rad. His main concern was to cool the starter. Positive ventalation is a good thing.
Giving the engine more to breathe is a great way to boost power. More air better combustion.
Like Stephen said I'm not a Ford guy either. How much intake air capacity do you have. Chevy's with the single horn aircleaner intake just cry out for this easy to make mod.
Glen,

Thanks. I followed that air intake modification when you posted it. Very interesting. I'm not a Ford guy either, but with this 370, I don't have much choice. The air cleaner housing actually has two intakes, one on either side, and the one on the right side actually goes out almost to the front grill. I'm planning to start by extending that one to the grill to take advantage of the air as it comes in the front. Short of spending money I don't have right now, that's about all I can do. Heat hasn't been a major problem yet, but we'll see this summer. I have a large double auxiliary electric fan that was put right in front of the radiator to push air directly across the core. I've switched it so I can control when it runs. Haven't even needed it yet, but I'm sure I'll use it this summer. Those fans also keep air moving past the engine and therefore down and out of the doghouse. Maybe later, I'll see about running another duct like the one in that project. Thanks for your interest and help.

Best,

Tim
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Old 01-09-2006, 02:28 PM   #11
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Tim.............

I talked to the Banks people at the Tampa show last year about installing their header system. They told me it won't fit on the 370's because of the way the Gillig frame is designed. He didn't think they had any plans to provide for this in the future.

Let me know if you do any of the removals you've mentioned above.
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Old 01-09-2006, 02:33 PM   #12
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Quote:
Originally Posted by Nick Danger
Tim.............

I talked to the Banks people at the Tampa show last year about installing their header system. They told me it won't fit on the 370's because of the way the Gillig frame is designed. He didn't think they had any plans to provide for this in the future.

Let me know if you do any of the removals you've mentioned above.
That's the story I got a year ago when I was considering the change. I'm probably going to wait a little on removing the life-support from the air pumps, but I still may disconnect the belt that drives the two pumps just to see if it runs with a little less effort. Not that it's straining now.

Tim
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Old 01-09-2006, 03:18 PM   #13
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Hmmm. Jegs sells header flanges and tubing kits. Know any good welders in your area who can make up a set of custom headers for the 370?
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Old 01-09-2006, 04:18 PM   #14
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Originally Posted by swebster
Hmmm. Jegs sells header flanges and tubing kits. Know any good welders in your area who can make up a set of custom headers for the 370?
No right off hand, but I have a shop that would know who does that kind of thing. I'll check. First, I've still got all the heater hoses to replace since most of it is 17 years old . That includes almost 2 20' pieces to the auxiliary heater. Not leaking, but I don't want to test the life span of rubber hoses on a vacation. Also, still replacing all the filters, etc., checking to see if I've actually stopped a hydraulic leak from one of the stabilizer hoses , and then I hope to put a Gear Vendors over/under to help with that 5.29 rear axle at highway speeds . Next, I'll look at a structure to cover this thing . Then, if I'm not in debtor's prison , I'll look at getting some custom headers made. Does this order of events sound about right?

Thanks for the help, as always.

Best, Tim
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