Boost and Colder Temps Outside

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BavarianSlide
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Boost and Colder Temps Outside

Postby BavarianSlide » Thu Dec 16, 2010 1:08 pm

So my truck normally boosts around 45 psi during the summer weather. Now that it has become colder outside it is boosting up around 50 psi. I always knew that vehicles with forced induction run better in the cold, but I always thought this was due to their being a higher density of air when it is cold. Is that correct or is it just as simple as colder intake charge temps?
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Re: Boost and Colder Temps Outside

Postby Yoshi » Thu Dec 16, 2010 2:16 pm

Denser air in the same psi == more potential combustion.

Your boost gauge should still read 45psi though. Maybe your WG tech isn't up to par. Or your WG reads boost from the turbo and not the intake where your boost gauge is reading?
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Re: Boost and Colder Temps Outside

Postby BavarianSlide » Thu Dec 16, 2010 2:31 pm

My truck does not use a wastegate, and the line for the boost reading comes off of the manifold
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Re: Boost and Colder Temps Outside

Postby Yoshi » Thu Dec 16, 2010 3:19 pm

Oh, well then that makes perfect sense to me.
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Re: Boost and Colder Temps Outside

Postby BavarianSlide » Thu Dec 16, 2010 3:34 pm

Yea, then my next thought was...well if I removed the air filter and just ran the compressor wheel open would that remove enough restriction to let it create even more boost? Obviously not something I would do dail just an idea.
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Re: Boost and Colder Temps Outside

Postby Yoshi » Thu Dec 16, 2010 3:47 pm

It would help. But not really. If you want more boost, run an open down pipe.
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Re: Boost and Colder Temps Outside

Postby BavarianSlide » Thu Dec 16, 2010 4:01 pm

By open down pipe do you mean down pipe only and then just dump all the smoke into the undercarriage of the truck and coat everything lol. OR 4" down pipe no cats, no resonator, no muffler to 5" stacks...

I think the 5" stacks make it feel extremely hick like but they came with the truck and I have yet to change it to anything else.
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Re: Boost and Colder Temps Outside

Postby Yoshi » Thu Dec 16, 2010 4:06 pm

Whatever is the most free flowing. You can dump under the truck or whatever. At minimum, keep whatever the DP starts at and make it that all the way to the tail pipe. No muffler, no cat, no nothing, just pipe.
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Re: Boost and Colder Temps Outside

Postby M20_fever » Thu Dec 16, 2010 6:59 pm

I demand pics of the truck! What engine, Duramax, Powerstroke, Cummings?
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Re: Boost and Colder Temps Outside

Postby BavarianSlide » Fri Dec 17, 2010 1:42 am

1996 Dodge 2500 Cummins... I try to stick with the straight 6 :)
An older picture, was the only one I could find on the computer. I'll try to get a couple in the next few days here.
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Re: Boost and Colder Temps Outside

Postby M20_fever » Fri Dec 17, 2010 2:27 am

manual or auto? Do the 2500's come with the 46re auto? I just sold my '97 Ram 1500 for a Ford f250 Powerstroke because I couldn't trust it anymore after having to put 3 transmissions in it within 90k miles. Otherwise a great truck, but I work my trucks hard and I couldn't afford a trans rebuild every year.
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Re: Boost and Colder Temps Outside

Postby BavarianSlide » Fri Dec 17, 2010 3:04 am

I <3 Cummins but most of the times I hate dodge more lol. They are known for terrible transmissions. The transmission in my truck is auto and im pretty sure it is a 47RE and if it isn't it is a 47RH. There is about 9500 dollars worth of billet and labor in the transmission in my truck.
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Re: Boost and Colder Temps Outside

Postby M20_fever » Fri Dec 17, 2010 3:45 am

yeah, I found a guy, Dr. Evil or something, who was selling bullet proof 46RE's but I sure wasn't about to drop 3k for a trans to put in a truck with a 318 in it. I needed to move up to a 3/4 ton to handle my 8k lb trailer, and I couldn't be happier with my 7.3 Powerstroke. International knows how to make a mean diesel, except for the 6.0, lol.

The guy who hauled my trailer from California for me had a '96 2500 Ram DRW with the Cummings paired to their 6 speed manual, that thing was a beast. He had nearly 500k on the clock and had only changed the clutch once 30k miles before.
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Re: Boost and Colder Temps Outside

Postby pr0craztinazn » Fri Dec 17, 2010 1:42 pm

M20_fever wrote:I demand pics of the truck! What engine, Duramax, Powerstroke, Cummings?

M20_fever wrote:The guy who hauled my trailer from California for me had a '96 2500 Ram DRW with the Cummings paired to their 6 speed manual...

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Sorry... that was bothering me.

Your truck is suffering from boost creep. It happens... long as you aren't leaning out, and I guess you have an EGT/Pyrometer to keep an eye on exhaust temps so you can tell if its running lean or not, you are fine.
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Re: Boost and Colder Temps Outside

Postby M20_fever » Fri Dec 17, 2010 6:23 pm

Yeah, I know it's cummins, assume thats the pic you posted because it's not loading. I always type Cummings...must be the porn lover in me.
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