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Old 08-07-2012, 04:57 PM   #29
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I guess being 1,000 overweight I'm not allowed to exceed 25 mph.

Cheers, Dan
I thought you said you lost some weight recently.
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Old 08-08-2012, 02:01 AM   #30
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Bkahler and gunner, your stories really start to explain more of this picture. I thought the Banks system would help a lot but it didn't help as much as I expected and the intake and especially the fuel pump could explain why. We've got the coach in the shop right now getting the rear fuel pump replaced and now I'm really looking forward to seeing the difference. I will report back. Thanks!
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Old 08-08-2012, 07:22 AM   #31
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bkahler, please advise where the extended air cleaner hose picks up the clean air and is it affected during heavy rains. There is not much room to put the hose out the front between the cruise control and the airconditioner compressor.
I'll try and snap a few pictures of the air intake on the 345 when I get hope this evening. We have never had any issue with heavy rains.

Brad
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Old 08-08-2012, 05:17 PM   #32
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Good feelback and discussion peeps!

My 454 has the Banks kit.
Someone replaced the Carb with an Edelbrock, and the stock airfilter base would not fit.
It had a pancake filter on it. I bet that pancake killed some power/economy by sucking hot, less dense air in.
Even so, I had no problem with power when I needed it on inclines on the freeway, and even pulled up over the continental divide at about 10,000'.
Best economy was nearly 8.5mpg on one leg.
I now have the Banks intake top and a unchopped stock lower restored and ready for when I swap the Quadrajet back on.


As Brad suggested, I will be extending the snorkle intake with a piece of trunking to maximising the cold air drawn in!

The plan is to also swap the stock cast iron intake at the same time with an Edelbrock Performer..
I am told this will add power/torque too..
Here is the rebuilt carb sitting on the intake..


My only concern is the under-doghouse clearance.... but I have a plan....
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Old 08-08-2012, 07:27 PM   #33
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bkahler, please advise where the extended air cleaner hose picks up the clean air and is it affected during heavy rains. There is not much room to put the hose out the front between the cruise control and the airconditioner compressor.
Here are some pics of the 1986 345 air feed hose from the front of the motorhome to the carburetor air filter inlet. This particular setup has a flat plate in front of the opening which I suppose is designed to keep water out.

On our 310 with the banks inlet it doesn't have that blocking the opening.

On our old winnebago I didn't use anything to block the opening either and never had a moisture problem.

Brad

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Old 08-08-2012, 09:29 PM   #34
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Banks cold-air inlet in front grill area

The set-up on my Banks is a bit different. Too dark right now to get any pix, but will post tomorrow.
Thanks, Derek
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Old 08-09-2012, 05:11 AM   #35
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Here are some pics of the 1986 345 air feed hose from the front of the motorhome to the carburetor air filter inlet. This particular setup has a flat plate in front of the opening which I suppose is designed to keep water out.

On our 310 with the banks inlet it doesn't have that blocking the opening.

On our old winnebago I didn't use anything to block the opening either and never had a moisture problem.

Brad

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Thanks for the pictures I will have to see what kind of clearances I have for routing a hose to the front.
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Old 08-09-2012, 09:50 AM   #36
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Thank too for those pics Brad...
I could not figure out where the snorkle of the filter went... I did not know it was going under the battery isolator bracket!
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Old 08-09-2012, 12:06 PM   #37
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Thank too for those pics Brad...
I could not figure out where the snorkle of the filter went... I did not know it was going under the battery isolator bracket!
Glad they helped.

Here are a couple of pictures of the Banks intake funnel on our 310. I don't care for the opening in the fitting on the right side and I'm assuming it was put there by Banks to keep moisture out of the carburetor. Personally I would prefer the ram air effect if it was blocked off. If any I would just make a very small hole for moisture to drain out of.

Brad

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Old 08-09-2012, 02:54 PM   #38
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Banks power pack

here's what I have on my '89. Brad, the photo you have of the inlet with plate directly in front of it, looks very similar, except there is an additional hose, going directly in front of the grill.
Seems they are similar, except for installer positioned my air intake a bit differently. Almost wondering if a rubber flap on back side of grill inlet wouldn't help with a more 'ram-air' effect? Realize there is the need of no water coming into carb, but that sort of travel of the incoming air, would that much rain get into the carb?
Thanks, Derek
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Old 08-09-2012, 03:10 PM   #39
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Derek,

Interesting differences in the air intake that Banks supplied. Ours was probably installed back in 86 when the motorhome was new so that might explain the difference between your arrangement and ours. Of course I'm referring to our 345.


Our 310 is the one that is like yours although it doesn't have the box where the hoses connect. Our hose comes straight from the carburetor to the front of the grille.

I do like your rubber flap idea. That would force more air towards the carburetor while still allowing the flap to open slightly to drain moisture off.

Brad
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Old 08-09-2012, 08:43 PM   #40
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Brad,
My guess for a rubber flap, I'm going to need to readjust the grill intake to look more like yours, since the 'dump' area for excess air is pointed downward......just my thought.
Thanks, Derek
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Old 08-10-2012, 10:17 AM   #41
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Brad,
My guess for a rubber flap, I'm going to need to readjust the grill intake to look more like yours, since the 'dump' area for excess air is pointed downward......just my thought.
Thanks, Derek
Derek,

There is nothing that says my intake is mounted properly. When we got the motorhome it was just hanging down in the grille area. I'm the one that tie wrapped it into place. I noticed on yours you have some sort of fastening system for it. Was that original with the Banks system or did you make it?

I have no idea if it should be sitting side to side or up and down.

If you could get better pictures of how yours mounts that would be great!

Thanks,

Brad
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Old 08-10-2012, 10:40 AM   #42
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The Banks manual has some good diagrams on page 7 for the mounting and fitting of the scoop...

Link to Manual...
http://assets.bankspower.com/manuals...340-v3-web.pdf
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