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7.3L IDI Diesels (Not Power Strokes) Technical discussion of topics related to vehicles powered by the 7.3 Liter In-Direct Injection Navistar engines.

       
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Old 06-22-2007, 12:35 AM   #1 (permalink)
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More Air to motor

Hey yall,

I noticed that the air intake on my 92 7.3 is very restrictive, so i am fabricating a 4 inch diameter pipe running fro the air intake up through the front of the hood, just like ram air. Heres my question, could i just take off the old air filter setup and just run one filter on the end of the new air intake tube that I am making, or should I keep the old filter as well as the new one. I know that the new on the front of the hood is going to eats alot of carp, bugs, dust etc.
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Old 06-22-2007, 01:09 AM   #2 (permalink)
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Re: More Air to motor

Look at this change I made. Nice sucking sound. Check my post on 6/20 Soup Bowl Gone

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Old 06-22-2007, 02:06 PM   #3 (permalink)
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Re: More Air to motor

Does it make any difference to the power?
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Old 06-22-2007, 08:47 PM   #4 (permalink)
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Re: More Air to motor

are there any power gains
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Old 06-23-2007, 12:36 AM   #5 (permalink)
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Re: More Air to motor

Sure seemed like it to me, I can smoke the dual wheels now a little. A 200 mile trip got me 17MPG, thought that was pretty good. Will check the MPG after tune up ext week end.

OLDBULL [img]/ubbthreads/images/graemlins/smokin.gif[/img] [img]/ubbthreads/images/graemlins/smokin.gif[/img] [img]/ubbthreads/images/graemlins/warmsmile.gif[/img]
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Rebuilding engine. 92 F350 7.3 IDI CC LB 2WD Banks turbo US Gear O/U

1990 F350 XLT Lariat 7.3L IDI E4OD Dually 280K+ 2WD
Reman Promar Long Block 11/07
Reman IP - New Delphi Injectors -New Beru GP's 07/07 New radiator & hoses New WP
Dual Exhaust 3"X18" resonators frnt. of rear wheels
Soup bowl gone, 4" intake W/AZ filter
Cobra CB W/Weather Interrupt - Dual Trucker Antenna's
Blk. Grill W/Brush Guards - Fog lights - Rally driving Lights. GN 20K & Reese 16K 5er hitch

http://community.webshots.com/user/oldbull8?

Formally OLDBULL

Toys: 1984 Coachmen Leprechaun F350 Chassis 460CID 92K miles.
30 ft. Jayco Jay Designer 5th wheel.

Have AutoEnginuity W/Ford enhanced. Lima OH area.

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Old 06-23-2007, 09:02 AM   #6 (permalink)
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Re: More Air to motor

thanks, i am going to try and build one similar to your but mine is coming right out if the hood like ram air, i am cutting a hole in the hood and running the filter right up on top of the hood
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Old 07-05-2007, 01:12 PM   #7 (permalink)
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Re: More Air to motor

[ QUOTE ]
thanks, i am going to try and build one similar to your but mine is coming right out if the hood like ram air, i am cutting a hole in the hood and running the filter right up on top of the hood

[/ QUOTE ]

Make sure to post pictures when you're done. I just got my truck a couple weeks ago and am nearing mod time [img]/ubbthreads/images/graemlins/smile.gif[/img]
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Old 07-07-2007, 12:52 AM   #8 (permalink)
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Re: More Air to motor

Keep the " pouring rain " water out of the intake as you roll down the Highway @ 70 MPH [img]/ubbthreads/images/graemlins/eek.gif[/img] [img]/ubbthreads/images/graemlins/eek.gif[/img]
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Old 07-07-2007, 10:08 AM   #9 (permalink)
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Re: More Air to motor

Id be afraid to have any intake that is higher than the intake manifold. It doesn't take alot of water in the cylinder during the compression stroke to hydro lock the motor which could lead to bent puchrods, damage to heads, connecting rods, and crank.

The clearance from piston to head is the width of the head gasket, around ".070 IIRC.

Its easy for water to travel down a cowl intake, but harder if it has to climb.
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