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Old Oct 19, 2010 | 03:47 PM
  #1  
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Boost problems

Guys I think I'm having a boost problem. There are no leaks but i'm wondering if my up-pipes are dicked.

The situation is like going up a hill in 6th gear with my foot on the boards at say.... 1500-1800rpm she only builds like 10psi. I can only hit max boost above 2500. Once i hit 2500 rpm it's like somebody kicked the truck in the *** and it boogies.

How do I get moar boost? I don't see any up-pipe leaks and i don't hear any either. Turbo has no shaft play and fins look good. ?????

Can someone just take a video of their truck in top gear start at like 1200rpm and boot it too like 2000 so i can see whats supposed to happen. Maybe a run in a lower gear showing rpm vs boost would be helpful as well. Thanks!!!
 
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Old Oct 19, 2010 | 07:24 PM
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You are only going to build max boost at higher rpm's. Anyway here is a bump for you.
 
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Old Oct 19, 2010 | 07:42 PM
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^^^^agreed, 6th gear and 1500rpms is lugging, downshift, it'll build boost
 
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Old Oct 19, 2010 | 09:56 PM
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how much boost do you build at 1800rpm when you stomp it?
 
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Old Oct 19, 2010 | 11:28 PM
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not over 15. am i the only one here that hates treating this thing like a detroit???
 
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Old Oct 19, 2010 | 11:35 PM
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what should i get at say 1800rpms foot on the boards in the highest setting??
 
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Old Oct 19, 2010 | 11:51 PM
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Get it to 1800 rpm and then stomp it and run what ever you would normally run.
If you can have someone record the boost gauge and post it if you are able.
 
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Old Oct 20, 2010 | 09:06 AM
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ok, i'll do that hopefully tonight....
 
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Old Oct 21, 2010 | 02:04 AM
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OK, thought I'd show you what mine does. Keep in mind I peak 24#s of bost and then it starts fluttering 23 to 24.
F250 :: WOT Test video by visseroth - Photobucket
 
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Old Oct 21, 2010 | 07:59 AM
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Originally Posted by Visseroth
OK, thought I'd show you what mine does. Keep in mind I peak 24#s of bost and then it starts fluttering 23 to 24.
F250 :: WOT Test video by visseroth - Photobucket
thank you so much man, that is exactly the type of video i was looking for... i'm going to do the EXACT same thing in my truck. I'll video and post back. It looked like you started at about 1800rpm maybe around 55mph and ended at 75mph @ full boost around 2200rpm? I also assume that was top gear?

Thanks again!!! rep sent!
 
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Old Oct 21, 2010 | 06:25 PM
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Take a peek man... I only got to 21-22psi @ 75. Apparently my HTC EVO isn't that great at taking video, sorry for king blurrycam.

YouTube - 7.3 boost test
 
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Old Oct 21, 2010 | 11:10 PM
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Started at about 1600 rpm, ended at 2200 rpm. I know it's hard to see what is going on and yes, that was in 5th gear, I didn't shift, just left it in the drive gear.

But yea, looks like you're boosting just fine. At least from what I can see in the video. You can double check your up-pipes for soot just to be sure you don't have leaks, but seems like it's fine to me.
 
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Old Oct 21, 2010 | 11:12 PM
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Oh, and thanks for the reps, LOL
 
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Old Oct 22, 2010 | 02:16 AM
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I'd be happy with 22psi. Like Viss said looks good
 
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Old Oct 22, 2010 | 06:04 PM
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cool. just freaking out for no reason, i'm good at that!!! thanks guys!
 
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