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post #1 of 16 Old 02-25-2006, 02:35 PM Thread Starter
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defueling

Hi new to the site

I am having a problem with my 7.3 defueling after 24psi of boost what can I do to correct this. I have a 2000 F-250 SD crew cab short bed.:burnout

:burnout
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post #2 of 16 Old 02-25-2006, 03:01 PM
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a boost relief valve should geterdone.

Bill
2000 f-250 4x4 ex cab 7.3 psd. diablo programmer, TS 6 pos. , 4" exhaust turbo back w/ 5" stacks, wicked wheel, HX cross over, zoodad mod, 6637 mod, boost pyro & trany on the a pilliar. 315/75/16 bfg mt's,.superwinch hub's, 6.0 trans cooler, banks trans command. sky jacker leveling kit


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post #3 of 16 Old 02-25-2006, 04:54 PM Thread Starter
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has anyone used on of the boost relifvalves on ther truck

:burnout
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post #4 of 16 Old 02-25-2006, 05:12 PM
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i've never had a defueling issue before. i'm sure some one here has used one of them valves before. maybe ramsmoker?

Bill
2000 f-250 4x4 ex cab 7.3 psd. diablo programmer, TS 6 pos. , 4" exhaust turbo back w/ 5" stacks, wicked wheel, HX cross over, zoodad mod, 6637 mod, boost pyro & trany on the a pilliar. 315/75/16 bfg mt's,.superwinch hub's, 6.0 trans cooler, banks trans command. sky jacker leveling kit


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post #5 of 16 Old 02-28-2006, 12:20 PM
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defueling

i have used the boost relief valve. actually its a pressure relief valve that goes in line to the map sensor. it fools the map sensor into believing that there is only 21-23 lbs. of boost being generated so it does not start defueling. i have used it before and after and have gotten 29 -30 lbs of boost after installing it 24 lbs before installing it. it works well but you still have to watch that u dont over boost ur truck. if your engine is old or you tow heavy loads ur boost may stay to high to keep the head gaskets from blowing.

2002 F450 PS 7.3 DUALLY PICKUP. AFE STAGE 2, BANKS BIG HOSS LEVEL 3, BANKS SIX GUN, BANKS BIGHEAD WASTEGATE, BANKS MONSTER EXHAUST W/POWER ELBOW, BANKS BILLET MULTI DISK TORQUE CONVERTER, BANKS TRANS COMMAND.AMSOIL BY-PASS FILTER, BOOST RELIEF VALVE, HP XOVER,CCV MOD,BALL BEARING TURBO,PUMP SHIM AND GAUGE, REBUILT TRANNY WITH ALL THE GOOD STUFF. TOWING 5TH WHEEL 14,000 LB. TOY HAULER.
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post #6 of 16 Old 02-28-2006, 01:27 PM
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Cool defueling

Relief valves are a must have. I also pulled the waste gate line off and plugged it. Ford vans don't have waste gates to start with. You can get the relief valves at defuser.com and blackclouddiesel.com. Cruz'n around on line I have seen other vendors. It won't be hard to find. All I have to do now is wait for Marc to nail me on the waste gate mod. Bill

The Ex -box. Total RSD system. See what happens when you let attorneys run your Country!!!! There's nothing wrong with a Democratic society, we just need to get rid of Democrats. 2001 Excursion. 2003 Cobra Terminator all pumped up. Now this is fuuuuuun.
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post #7 of 16 Old 02-28-2006, 10:31 PM
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do you think running 30 psi of boost will be hard on the stock turbo?
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post #8 of 16 Old 03-01-2006, 07:14 AM
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stock turbo

while a stock turbo can generate 30 lbs of boost it will be hard on it and may shorten its life span . its meant to run in th 15-19 area so im told.

2002 F450 PS 7.3 DUALLY PICKUP. AFE STAGE 2, BANKS BIG HOSS LEVEL 3, BANKS SIX GUN, BANKS BIGHEAD WASTEGATE, BANKS MONSTER EXHAUST W/POWER ELBOW, BANKS BILLET MULTI DISK TORQUE CONVERTER, BANKS TRANS COMMAND.AMSOIL BY-PASS FILTER, BOOST RELIEF VALVE, HP XOVER,CCV MOD,BALL BEARING TURBO,PUMP SHIM AND GAUGE, REBUILT TRANNY WITH ALL THE GOOD STUFF. TOWING 5TH WHEEL 14,000 LB. TOY HAULER.
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post #9 of 16 Old 03-06-2006, 04:21 PM Thread Starter
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I have a ported and polished turbo but i dont wont to shorten the life of my truck. So are you saying put the relif valve on my truck. I also have the waste gate un pluged.

:burnout
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post #10 of 16 Old 03-06-2006, 09:12 PM
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defueling

well to be honest with you i have tried all those tricks like unplugging the wastegate hose, using a relief valve and a few more to attain 30 lbs of boost. then i relized that i bought gale banks tuners so i would have safe gaurds built in and here i am trying to over ride them. it sure is nice to feel the engine come to life with out defueling when u reach 24 lbs. but i got scared that it would hurt the motor the more i pushed. call me a chicken but i went back to using no relief valve and having the waste gate open when its meant to. i cant afford to blow a head gasket or something worse just to feel a kick in the pants. i still use the big hoss, six gun, big head, and a ported housing but i let the safetys keep me from being my own worse enemy. i wish i could build this engine to handle the extra power i would like to give it but my pockets are running on empty lately . they say the older u get the wiser u get. dont believe it im a perfect example of a 48 yr old that never grew up.....lmao

2002 F450 PS 7.3 DUALLY PICKUP. AFE STAGE 2, BANKS BIG HOSS LEVEL 3, BANKS SIX GUN, BANKS BIGHEAD WASTEGATE, BANKS MONSTER EXHAUST W/POWER ELBOW, BANKS BILLET MULTI DISK TORQUE CONVERTER, BANKS TRANS COMMAND.AMSOIL BY-PASS FILTER, BOOST RELIEF VALVE, HP XOVER,CCV MOD,BALL BEARING TURBO,PUMP SHIM AND GAUGE, REBUILT TRANNY WITH ALL THE GOOD STUFF. TOWING 5TH WHEEL 14,000 LB. TOY HAULER.
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