How does the 7.3 make boost???
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Tuned
Joined: Nov 2006
Posts: 296
Likes: 14
From: Jefferson, TX
How does the 7.3 make boost???
So i was driving down the road listening to the nice sound of the truck. Got to thinking about boost numbers and what to expect once I chip it. Then got curious about how the 7.3 regulates boost. If a chip produces more, how?? Is it just a function of fuel delivery and or timing??
Last edited by jtexfisher; Sep 19, 2011 at 05:43 PM. Reason: Better title. Wait a day and it'll be a totally different thread. :)
Thread Starter
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Tuned
Joined: Nov 2006
Posts: 296
Likes: 14
From: Jefferson, TX
The more I sit here and think about it it has to be a matter of how much fuel is being burned at a given RPM. Fuel burns, makes hot gas, lots of volume. The expanding gas heads out the exhaust pipe, going through the ????? side of the turbocharger, making it spin. So if a chip puts more fuel in, there's more gas produced, hence more turbo action. Then things that make sure you get your moneys worth come into play. Making sure the hot gas stays where it should, not shooting past boots or exhaust pipe leaks. And of course turbo veins that are not beat up (like mine) help quite a bit too.
I see 12ish with mine under a heavy load. So things could be worse.
I see 12ish with mine under a heavy load. So things could be worse.
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Tuned
Joined: Nov 2006
Posts: 296
Likes: 14
From: Jefferson, TX
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Hotshot
Joined: Jul 2003
Posts: 12,177
Likes: 40
From: Newport, WA
I have horrible up pipe and/or manifold leaks right now and I can make 32psi boost in a hurry. I know it would go higher if I didn't have so many leaks. Trouble is anything above 25 psi and you're just blowing hot air into the motor on a stock turbo because it's past its map and you run the risk of blowing the turbo up.
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